/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2Glass::RenderScene()
{
if (PVRShellIsKeyPressed(PVRShellKeyNameLEFT)) m_iEffect -= 1;
if (PVRShellIsKeyPressed(PVRShellKeyNameRIGHT)) m_iEffect += 1;
m_iEffect = (m_iEffect + g_iNumEffects) % g_iNumEffects;
UpdateScene();
DrawIntoParaboloids(PVRTVec3(0, 0, 0));
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Draw the ball
DrawBall();
// Draw the balloons
DrawBalloons(&m_DefaultProgram, m_mProjection, m_mView, m_mModels, 2);
// Draw the skybox
DrawSkybox();
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("Glass", g_aszEffectNames[m_iEffect], ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3ShadowMapping::RenderScene()
{
Update();
// Bind the frame buffer object
glBindFramebuffer(GL_FRAMEBUFFER, m_uiFrameBufferObject);
// Clear the screen and depth buffer so we can render from the light's view
glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT);
// Set the current viewport to our texture size but leave a one pixel margin.
// As we are clamping to the edge of the texture when shadow mapping, no object
// should be rendered to the border, otherwise stretching artefacts might occur
// outside of the coverage of the shadow map.
glViewport(1, 1, m_ui32ShadowMapSize-2, m_ui32ShadowMapSize-2);
// Since we don't care about colour when rendering the depth values to
// the shadow-map texture, we disable color writing to increase speed.
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
// Cull the front faces, so that only the backfaces are rendered into the shadowmap
glCullFace(GL_FRONT);
// Draw everything that we would like to cast a shadow
RenderSceneWithEffect(INDEX_RENDERSHADOW, m_mLightProjection, m_mLightView);
// Set the culling mode for the normal rendering
glCullFace(GL_BACK);
// Turn colour buffer writes back on again
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
// Restore our normal viewport size to our screen width and height
glViewport(0, 0,PVRShellGet(prefWidth),PVRShellGet(prefHeight));
//Invalidate the framebuffer attachments we don't need to avoid unnecessary copying to system memory
const GLenum attachment = GL_COLOR_ATTACHMENT0;
glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, &attachment);
glBindFramebuffer(GL_FRAMEBUFFER, m_i32OriginalFbo);
// Clear the colour and depth buffers, we are now going to render the scene again from scratch
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Load the shadow shader. This shader requires additional parameters; texProjMatrix for the depth buffer
// look up and the light direction for diffuse light (the effect is a lot nicer with the addition of the
// diffuse light).
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_uiShadowMapTexture);
glActiveTexture(GL_TEXTURE0);
RenderSceneWithEffect(INDEX_RENDERSCENE, m_mProjection, m_mView);
m_Print3D.DisplayDefaultTitle("ShadowMap", "", ePVRTPrint3DSDKLogo);
m_Print3D.Print3D(5.0f, 90.0f, 1.0f, 0xFFFFFFFF, "Bias: %f", m_fBias);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3AlphaTest::RenderScene()
{
// Clear color and z buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Set texture
glBindTexture(GL_TEXTURE_2D, m_uiTexture);
/*
Draw the left cube using alpha blending
*/
glUseProgram(m_TexShaderProgram.uiId);
glEnable(GL_BLEND);
// Setup blending for transparency
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// Calculate the model matrix for the left cube
PVRTMat4 mModel = PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += .005f;
mModel.preTranslate(0.6f, 0, 0);
// Calculate the model view projection (MVP) matrix and pass it to the shader
PVRTMat4 mMVP = m_mViewProj * mModel;
glUniformMatrix4fv(m_TexShaderProgram.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.ptr());
// Draw left cube
DrawModel();
/*
Draw the right cube using alpha test.
*/
glUseProgram(m_DiscardShaderProgram.uiId);
glDisable(GL_BLEND);
// Set alpha test to discard fragments with an alpha value of less than 0.2
glUniform1f(m_DiscardShaderProgram.uiAlphaRefLoc, 0.2f);
// Calculate the model matrix for the right cube
mModel.preTranslate(-1.2f, 0, 0);
// Calculate the model view projection (MVP) matrix and pass it to the shader
mMVP = m_mViewProj * mModel;
glUniformMatrix4fv(m_DiscardShaderProgram.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.ptr());
// Draw right cube
DrawModel();
// Display the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("AlphaTest", "", ePVRTPrint3DSDKLogo);
m_Print3D.Print3D(10.0f, 10.0f, 1.0f, 0xFFFF00FF, "Alpha Blend");
m_Print3D.Print3D(60.0f, 10.0f, 1.0f, 0xFFFF00FF, "Alpha Test");
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2Fog::RenderScene()
{
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Keyboard input (cursor to change fog function)
if (PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
m_eFogMode = EFogMode((m_eFogMode + eNumFogModes - 1) % eNumFogModes);
}
if (PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
m_eFogMode = EFogMode((m_eFogMode + 1) % eNumFogModes);
}
// Use the loaded shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind texture
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiTexture);
// Set uniforms
glUniform1i(m_ShaderProgram.uiFogFuncLoc, m_eFogMode);
// Rotate and translate the model matrix
PVRTMat4 mModel = PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += PVRT_PI / 90;
mModel.preTranslate(0, 0, 500 * cos(m_fPositionZ) - 450);
m_fPositionZ += (2*PVRT_PI)*0.0008f;
// Feed Projection and Model View matrices to the shaders
PVRTMat4 mModelView = m_mView * mModel;
PVRTMat4 mMVP = m_mProjection * mModelView;
glUniformMatrix4fv(m_ShaderProgram.uiModelViewLoc, 1, GL_FALSE, mModelView.ptr());
glUniformMatrix4fv(m_ShaderProgram.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.ptr());
// Pass the light direction transformed with the inverse of the ModelView matrix
// This saves the transformation of the normals per vertex. A simple dot3 between this direction
// and the un-transformed normal will allow proper smooth shading.
PVRTVec3 vMsLightDir = (PVRTMat3(mModel).inverse() * PVRTVec3(1, 1, 1)).normalized();
glUniform3fv(m_ShaderProgram.uiLightDirLoc, 1, vMsLightDir.ptr());
/*
Now that the model-view matrix is set and the materials ready,
call another function to actually draw the mesh.
*/
DrawMesh(0);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("Fog", "", ePVRTPrint3DLogoIMG);
m_Print3D.Print3D(0.3f, 7.5f, 0.75f, PVRTRGBA(255,255,255,255), "Fog Mode: %s", g_FogFunctionList[m_eFogMode]);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3TextureStreaming::RenderScene()
{
// Clears the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Time based animation and locks the app to 60 FPS.
// Uses the shell function PVRShellGetTime() to get the time in milliseconds.
unsigned long ulTime = PVRShellGetTime();
unsigned long ulDeltaTime = ulTime - m_ulTimePrev;
m_ulTimePrev = ulTime;
m_fFrame += (float)ulDeltaTime * (60.0f/1000.0f);
m_fBandScroll += (float)ulDeltaTime * (60.0f/1000.0f) * c_fBandScrollSpeed;
if(m_fFrame > m_Scene.nNumFrame - 1)
m_fFrame = 0.0f;
if(m_fBandScroll > 1.0f)
m_fBandScroll = -c_fBandWidth;
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
m_Scene.SetFrame(m_fFrame);
// Setup the main camera
PVRTVec3 vFrom, vTo(0.0f), vUp(0.0f, 1.0f, 0.0f);
float fFOV;
// Camera nodes are after the mesh and light nodes in the array
int i32CamID = m_Scene.pNode[m_Scene.nNumMeshNode + m_Scene.nNumLight + c_ui32Camera].nIdx;
// Get the camera position, target and field of view (fov)
if(m_Scene.pCamera[i32CamID].nIdxTarget != -1) // Does the camera have a target?
fFOV = m_Scene.GetCameraPos( vFrom, vTo, c_ui32Camera); // vTo is taken from the target node
else
fFOV = m_Scene.GetCamera( vFrom, vTo, vUp, c_ui32Camera); // vTo is calculated from the rotation
float fTargetAspect = 960.0f/640.0f;
float fAspect = (float)PVRShellGet(prefWidth) / (float)PVRShellGet(prefHeight);
fFOV *= fTargetAspect / fAspect;
PVRTMat4 mView = PVRTMat4::LookAtRH(vFrom, vTo, vUp);
PVRTMat4 mProjection = PVRTMat4::PerspectiveFovRH(fFOV, (float)PVRShellGet(prefWidth)/(float)PVRShellGet(prefHeight), c_fCameraNear,
c_fCameraFar, PVRTMat4::OGL, bRotate);
PVRTMat4 mViewProjection = mProjection * mView;
DrawPODScene(mViewProjection);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("Texture Streaming", c_pszDescription, ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
++m_i32Frame;
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occurred
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevant OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2FilmTV::RenderScene()
{
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
// Enable the vertex attribute arrays
glEnableVertexAttribArray(VERTEX_ARRAY);
glEnableVertexAttribArray(NORMAL_ARRAY);
// Render everything from the mini-camera's point of view if we have the FBOs
CalcMiniCameraView();
if(m_bFBOsCreated)
{
// Setup the Viewport to the dimensions of the texture
glViewport(0, 0, m_i32TexSize, m_i32TexSize);
glBindFramebuffer(GL_FRAMEBUFFER, m_uiFbo[m_i32CurrentFBO]);
DrawPODScene(m_MiniCamViewProj, false);
if(m_bDiscard) // Was GL_EXT_discard_framebuffer supported?
{
/*
Give the drivers a hint that we don't want the depth and stencil information stored for future use.
Note: This training course doesn't have any stencil information so the STENCIL_ATTACHMENT enum
is used for demonstrations purposes only and will be ignored by the driver.
*/
const GLenum attachments[] = { GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT };
m_Extensions.glDiscardFramebufferEXT(GL_FRAMEBUFFER, 2, attachments);
}
glBindFramebuffer(GL_FRAMEBUFFER, m_i32OriginalFB);
// Render everything
// Setup the Viewport to the dimensions of the screen
glViewport(0, 0, PVRShellGet(prefWidth), PVRShellGet(prefHeight));
}
DrawPODScene(m_ViewProjection, true);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("FilmTV", "", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
// Swap the FBO that we want to render to
m_i32CurrentFBO = 1 - m_i32CurrentFBO;
++m_i32Frame;
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2MultiThreading::RenderScene()
{
// Render the loading screen while we wait for resources to load.
if(bLoading)
{
// Render the animated loading scene.
RenderLoadingScene(iFrame++);
/*
Check if the resources are still being loaded.
This is performed by querying EGL to determine if a sync object has been signalled.
*/
EnterCriticalSection(&handles.mutex);
if(handles.eglSync != EGL_NO_SYNC_KHR)
{
// Perform a non-blocking poll to check if the shared egl sync object has been signalled.
EGLint status = eglClientWaitSyncKHR(handles.eglDisplay, handles.eglSync, 0, 0);
if(status == EGL_CONDITION_SATISFIED_KHR)
{
// Destroy the egl sync object as soon as we aware of it's signal status.
if(eglDestroySyncKHR(handles.eglDisplay, handles.eglSync) != EGL_TRUE)
{
PVRShellSet(prefExitMessage, "eglDestroySyncKHR returned unexpected EGL_FALSE.\n");
return false;
}
bLoading = false;
}
else if(status == EGL_FALSE)
{
PVRShellSet(prefExitMessage, "eglClientWaitSyncKHR returned unexpected EGL_FALSE.\n");
return false;
}
}
LeaveCriticalSection(&handles.mutex);
}
else
{
glEnable(GL_DEPTH_TEST);
// Render the pre-loaded scene
RenderCubeScene(iFrame++);
glDisable(GL_DEPTH_TEST);
}
print3D.DisplayDefaultTitle("MultiThreading", "", ePVRTPrint3DSDKLogo);
print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2ProceduralTextures::RenderScene()
{
if (!HandleInput())
{ return false; }
glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_ui32ColourSplineTexture);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_FnTexture);
glDisable(GL_CULL_FACE);
glDisable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glUseProgram(m_auiShaderProgramId[m_uiVisualisation]);
const float fIndex = m_uiGenerator / (float)(NUM_GENERATORS - 1);
glUniform1f(m_aiColourSplineIndices[m_uiGenerator], fIndex);
glEnableVertexAttribArray(VERTEX_ARRAY);
glEnableVertexAttribArray(TEXTURE_ARRAY);
// Pass the vertex data
GLfloat pfVertices[] = { -1.0f, -1.0f, 0.0f, 1.0f, -1.0f, 0.0f, 1.0f, 1.0f, 0.0f, -1.0f, 1.0f, 0.0f };
glVertexAttribPointer(VERTEX_ARRAY, 3, GL_FLOAT, GL_FALSE, 0, pfVertices);
// Pass the texture coordinates data
GLfloat pfTexCoord[] = { 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f };
glVertexAttribPointer(TEXTURE_ARRAY, 2, GL_FLOAT, GL_FALSE, 0, pfTexCoord);
unsigned short indices[] = { 0, 1, 3, 1, 2, 3 };
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
glDisableVertexAttribArray(VERTEX_ARRAY);
glDisableVertexAttribArray(TEXTURE_ARRAY);
glUseProgram(0);
m_Print3D.DisplayDefaultTitle("OpenGL ES Compute Shader Procedural Textures", NULL, ePVRTPrint3DSDKLogo);
m_Print3D.Print3D(1.0f, 80.0f, 1.0f, 0xFFFFFFFF, "Metric: %s", m_pProceduralTextures->GetModeDescription((eGenerator)m_uiGenerator));
m_Print3D.Print3D(1.0f, 90.0f, 1.0f, 0xFFFFFFFF, "Evaluator: %s", c_szVisualisationsDescriptions[m_uiVisualisation]);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occurred
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevant OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2ParallaxBumpMap::RenderScene()
{
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind textures
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiBaseTex);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_uiNormalMap);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, m_uiHeightMap);
// Calculate the model matrix
PVRTMat4 mModel = PVRTMat4::Scale(g_CubeScale);
mModel *= PVRTMat4::Translation(g_CubeTranslation);
mModel *= PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += PVRT_PI / 450;
// Set the Model View matrix
PVRTMat4 mMV = m_mView * mModel;
glUniformMatrix4fv(m_ShaderProgram.auiLoc[eModelViewMatrix], 1, GL_FALSE, mMV.ptr());
// Set the ModelViewIT Matrix
PVRTMat4 mMIT = mMV.transpose();
mMIT = mMIT.inverseEx();
PVRTMat3 mMIT3x3 = PVRTMat3(mMIT);
glUniformMatrix3fv(m_ShaderProgram.auiLoc[eNormal], 1, GL_FALSE, mMIT3x3.ptr());
// Set model view projection matrix
PVRTMat4 mMVP = m_mViewProj * mModel;
glUniformMatrix4fv(m_ShaderProgram.auiLoc[eModelViewProj], 1, GL_FALSE, mMVP.ptr());
// Set light position in eye space
PVRTVec4 vEyeSpaceLightPos = m_mView * g_LightPos;
glUniform3fv(m_ShaderProgram.auiLoc[eLightEyeSpacePos], 1, vEyeSpaceLightPos.ptr());
DrawMesh(0);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("Parallax Bumpmap", "", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3ComplexLighting::RenderScene()
{
// Clears the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Keyboard input (cursor to change light)
if (PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
m_eLightType = ELightType((m_eLightType + eNumLightTypes - 1) % eNumLightTypes);
}
if (PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
m_eLightType = ELightType((m_eLightType + 1) % eNumLightTypes);
}
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind texture
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiTexture);
glUniform1i(m_ShaderProgram.uiLightSelLoc, m_eLightType);
// Rotate and Translation the model matrix
PVRTMat4 mModel = PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += PVRT_PI / 150;
// Set model view projection matrix
PVRTMat4 mModelView = m_mView * mModel;
PVRTMat4 mMVP = m_mProjection * mModelView;
glUniformMatrix4fv(m_ShaderProgram.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.ptr());
// Set model view matrix
glUniformMatrix4fv(m_ShaderProgram.uiModelViewLoc, 1, GL_FALSE, mModelView.ptr());
// Set model view inverse transpose matrix
PVRTMat3 mModelViewIT = PVRTMat3(mModelView).inverse().transpose();
glUniformMatrix3fv(m_ShaderProgram.uiModelViewITLoc, 1, GL_FALSE, mModelViewIT.ptr());
DrawMesh(0);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("ComplexLighting", c_aszLightTypeList[m_eLightType], ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2FastTnL::RenderScene()
{
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind texture
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiTexture);
/*
Now that the uniforms are set, call another function to actually draw the mesh.
*/
DrawMesh(0);
// Rotate the model matrix
PVRTMat4 mModel = PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += 0.02f;
// Calculate model view projection matrix
PVRTMat4 mMVP = m_mViewProj * mModel;
// Feeds Projection Model View matrix to the shaders
glUniformMatrix4fv(m_ShaderProgram.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.ptr());
/*
The inverse of a rotation matrix is the transposed matrix
Because of v * M = transpose(M) * v, this means:
v * R == inverse(R) * v
So we don't have to actually invert or transpose the matrix
to transform back from world space to model space
*/
PVRTVec3 vMsLightDir = (PVRTVec3(1, 1, 1) * PVRTMat3(mModel)).normalized();
glUniform3fv(m_ShaderProgram.uiLightDirLoc, 1, vMsLightDir.ptr());
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("FastTnL", "", ePVRTPrint3DLogoIMG);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3PerturbedUvs::RenderScene()
{
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind textures
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiReflectTex);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_uiNormalTex);
// Rotate and translate the model matrix
PVRTMat4 mModel;
mModel = PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += PVRT_PI / 210;
// Set model view projection matrix
PVRTMat4 mModelView, mMVP;
mModelView = m_mView * mModel;
mMVP = m_mProjection * mModelView;
glUniformMatrix4fv(m_ShaderProgram.auiLoc[eMVPMatrix], 1, GL_FALSE, mMVP.ptr());
// Set eye position in model space
PVRTVec4 vEyePosModel;
vEyePosModel = mModelView.inverse() * PVRTVec4(0, 0, 0, 1);
glUniform3fv(m_ShaderProgram.auiLoc[eEyePosModel], 1, &vEyePosModel.x);
/*
Now that the uniforms are set, call another function to actually draw the mesh.
*/
DrawMesh(0);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("PerturbedUvs", "", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3Bumpmap::RenderScene()
{
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind textures
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiBaseTex);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_uiNormalMap);
// Calculate the model matrix
PVRTMat4 mModel = PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += PVRT_PI / 150;
// Set model view projection matrix
PVRTMat4 mMVP = m_mViewProj * mModel;
glUniformMatrix4fv(m_ShaderProgram.auiLoc[eMVPMatrix], 1, GL_FALSE, mMVP.ptr());
// Set light position in model space
/*
The inverse of a rotation matrix is the transposed matrix
Because of v * M = transpose(M) * v, this means:
v * R == inverse(R) * v
So we don't have to actually invert or transpose the matrix
to transform back from world space to model space
*/
PVRTVec4 vMsLightPos = PVRTVec4(50, 20, 40, 1) * mModel;
glUniform3fv(m_ShaderProgram.auiLoc[eLightPos], 1, &vMsLightPos.x);
DrawMesh(0);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("Bumpmap", "", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occurred
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevant OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2Shaders::RenderScene()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Keyboard input (cursor to change shaders and meshes)
if (PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
m_nCurrentShader--;
if(m_nCurrentShader<0) m_nCurrentShader=(g_numShaders-1);
}
if (PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
m_nCurrentShader++;
if(m_nCurrentShader>(g_numShaders-1)) m_nCurrentShader=0;
}
if (PVRShellIsKeyPressed(PVRShellKeyNameDOWN))
{
m_nCurrentSurface--;
if(m_nCurrentSurface<0) m_nCurrentSurface=(g_numSurfaces-1);
ComputeSurface(m_nCurrentSurface);
}
if (PVRShellIsKeyPressed(PVRShellKeyNameUP))
{
m_nCurrentSurface++;
if(m_nCurrentSurface>(g_numSurfaces-1)) m_nCurrentSurface=0;
ComputeSurface(m_nCurrentSurface);
}
// Draw the mesh
ComputeViewMatrix();
DrawModel();
// Display screen info
m_Print3D.DisplayDefaultTitle("Shaders", NULL, ePVRTPrint3DSDKLogo);
m_Print3D.Print3D(0.3f, 7.5f, 0.75f, 0xFFFFFFFF, "Shader: %s\nMesh: %s", g_ShaderList[m_nCurrentShader], g_SurfacesList[m_nCurrentSurface]);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2ParticleSystem::RenderScene()
{
HandleInput();
UpdateParticles();
UpdateFramerateCounter();
float time_delta = PVRShellGetTime() / 10000.0f;
PVRTVec3 vFrom = PVRTVec3((float) sin(time_delta) * 50.0f, 30.0f, (float) cos(time_delta) * 50.0f);
m_mView = PVRTMat4::LookAtRH(vFrom, PVRTVec3(0.0f, 5.0f, 0.0f), PVRTVec3(0.0f, 1.0f, 0.0f));
m_mViewProjection = m_mProjection * m_mView;
// Clear colour and depth buffers
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Enables depth testing
glEnable(GL_DEPTH_TEST);
// Render floor
RenderFloor();
for (unsigned int i=0; i < g_cuiNumSpheres; i++)
RenderSphere(g_caSpheres[i].aPosition, g_caSpheres[i].fRadius);
// Render particles
RenderParticles();
// Display info text.
char lower_buffer[64];
unsigned int numParticles = m_pParticleSystem->GetNumberOfParticles();
sprintf(lower_buffer, "No. of Particles: %d", numParticles);
m_Print3D.DisplayDefaultTitle("Particle System", NULL, ePVRTPrint3DSDKLogo);
m_Print3D.Print3D(2.0f, 90.0f, 1.0f, 0xFFFFFFFF, "No. of Particles: %d", numParticles);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3CellShading::RenderScene()
{
// Clears the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use the loaded shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind textures
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiShadingTex);
// Calculate the model matrix
PVRTMat4 mModel = PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += PVRT_PI / 210;
// Set model view projection matrix
PVRTMat4 mMVP = m_mViewProj * mModel;
glUniformMatrix4fv(m_ShaderProgram.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.ptr());
// Set eye position in model space
PVRTVec4 vMsEyePos = PVRTVec4(0, 0, 125, 1) * mModel;
glUniform3fv(m_ShaderProgram.uiEyePosLoc, 1, vMsEyePos.ptr());
// transform directional light from world space to model space
PVRTVec3 vMsLightDir = PVRTVec3(PVRTVec4(1, 2, 1, 0) * mModel).normalized();
glUniform3fv(m_ShaderProgram.uiLightDirLoc, 1, vMsLightDir.ptr());
DrawMesh(0);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("CellShading", "", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2RenderToTexture::RenderScene()
{
/* vary the branch angles on the fractal sinusoidally */
m_fAngle = (float)(sin(0.25*PVRT_PIf*(float)(m_ui32Framenum)/256.0f))* 70.0f;
/* largeish prime number in the angular frequency here, so the motion's not obviously periodic */
m_fAngle2 = (float)(sin((79.0f/256.0f)*2.0*PVRT_PIf*(float)(m_ui32Framenum)/256.0f))*100.0f + 30.0f;
/* Convert the angles to radians. */
m_fAngle *= 0.017453f;
m_fAngle2 *= 0.017453f;
/* Increase the frame count */
if(PVRShellGetTime() - m_ui32Time > 10)
{
m_ui32Time = PVRShellGetTime();
m_ui32Framenum += 2;
if(m_ui32Framenum > 20000)
m_ui32Framenum = 0;
}
// Disable depth test and culling as we don't need it
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
// Draw the RenderToTexture
if(!DrawScreen())
return false;
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("Render to Texture", "Using FBO", ePVRTPrint3DLogoIMG);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLESParticles::RenderScene()
{
int i;
PVRTMat4 mRotY;
// Clear colour and depth buffers
myglClearColor(f2vt(0.0f), f2vt(0.0f), f2vt(0.0f), f2vt(1.0f));
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Enables depth testing
glEnable(GL_DEPTH_TEST);
// Modify per-frame variables controlling the particle mouvements.
float fSpeedCtrl = (float) (PVRTFSIN(m_fRot*0.01f)+1.0f)/2.0f;
float fStopNo = 0.8f;
float fStep = 0.1f;
if(fSpeedCtrl > fStopNo)
fStep = 0.0f;
// Generate particles as needed.
if((m_i32NumParticles < (int) g_ui32MaxParticles) && (fSpeedCtrl <= fStopNo))
{
int num_to_gen = (int) (RandPositiveFloat()*(g_ui32MaxParticles/100.0));
if(num_to_gen == 0)
num_to_gen = 1;
for(i = 0; (i < num_to_gen) && (m_i32NumParticles < (int) g_ui32MaxParticles); ++i)
SpawnParticle(&m_Particles[m_i32NumParticles++]);
}
// Build rotation matrix around axis Y.
mRotY = PVRTMat4::RotationY(f2vt((m_fRot2*PVRT_PIf)/180.0f));
for(i = 0; i < m_i32NumParticles; ++i)
{
// Transform particle with rotation matrix
m_sParticleVTXPSBuf[i].x = VERTTYPEMUL(mRotY.f[ 0], m_Particles[i].m_fPosition.x) +
VERTTYPEMUL(mRotY.f[ 4], m_Particles[i].m_fPosition.y) +
VERTTYPEMUL(mRotY.f[ 8], m_Particles[i].m_fPosition.z) +
mRotY.f[12];
m_sParticleVTXPSBuf[i].y = VERTTYPEMUL(mRotY.f[ 1], m_Particles[i].m_fPosition.x) +
VERTTYPEMUL(mRotY.f[ 5], m_Particles[i].m_fPosition.y) +
VERTTYPEMUL(mRotY.f[ 9], m_Particles[i].m_fPosition.z) +
mRotY.f[13];
m_sParticleVTXPSBuf[i].z = VERTTYPEMUL(mRotY.f[ 2], m_Particles[i].m_fPosition.x) +
VERTTYPEMUL(mRotY.f[ 6], m_Particles[i].m_fPosition.y) +
VERTTYPEMUL(mRotY.f[10], m_Particles[i].m_fPosition.z) +
mRotY.f[14];
m_sParticleVTXPSBuf[i].fSize = m_Particles[i].m_fSize;
m_sNormalColour[i].r = vt2b(m_Particles[i].m_fColour.x);
m_sNormalColour[i].g = vt2b(m_Particles[i].m_fColour.y);
m_sNormalColour[i].b = vt2b(m_Particles[i].m_fColour.z);
m_sNormalColour[i].a = (unsigned char)255;
m_sReflectColour[i].r = vt2b(VERTTYPEMUL(m_Particles[i].m_fColour.x, g_fFactor));
m_sReflectColour[i].g = vt2b(VERTTYPEMUL(m_Particles[i].m_fColour.y, g_fFactor));
m_sReflectColour[i].b = vt2b(VERTTYPEMUL(m_Particles[i].m_fColour.z, g_fFactor));
m_sReflectColour[i].a = (unsigned char)255;
}
glBindBuffer(GL_ARRAY_BUFFER, m_i32VertVboID);
glBufferData(GL_ARRAY_BUFFER, sizeof(SVtxPointSprite)*m_i32NumParticles, m_sParticleVTXPSBuf,GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, m_i32ColAVboID);
glBufferData(GL_ARRAY_BUFFER, sizeof(SColors)*m_i32NumParticles, m_sNormalColour,GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, m_i32ColBVboID);
glBufferData(GL_ARRAY_BUFFER, sizeof(SColors)*m_i32NumParticles, m_sReflectColour,GL_DYNAMIC_DRAW);
// clean up render states
glDisable(GL_BLEND);
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
// Draw floor.
// Save modelview matrix
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
myglRotate(f2vt(-m_fRot), f2vt(0.0f), f2vt(1.0f), f2vt(0.0f));
// setup render states
glDisable(GL_LIGHTING);
glEnable(GL_TEXTURE_2D);
glDisable(GL_CULL_FACE);
glEnable(GL_BLEND);
// Set texture and texture environment
glBindTexture(GL_TEXTURE_2D, m_ui32FloorTexName);
glBlendFunc(GL_ONE, GL_ONE);
// Render floor
RenderFloor();
// clean up render states
glDisable(GL_BLEND);
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
glPopMatrix();
// Render particles reflections.
// set up render states
glDisable(GL_LIGHTING);
glEnable(GL_TEXTURE_2D);
glDepthFunc(GL_ALWAYS);
glDisable(GL_CULL_FACE);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
myglTexEnv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBindTexture(GL_TEXTURE_2D, m_ui32TexName);
// Set model view matrix
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
myglScale(f2vt(1.0f), f2vt(-1.0f), f2vt(1.0f));
myglTranslate(f2vt(0.0f), f2vt(0.01f), f2vt(0.0f));
glEnable(GL_POINT_SPRITE_OES);
if(((int)(m_i32NumParticles * 0.5f)) > 0)
RenderParticle(((int)(m_i32NumParticles*0.5f)),true);
glPopMatrix();
// Render particles.
// Sets the model view matrix
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
if(m_i32NumParticles > 0)
RenderParticle(m_i32NumParticles,false);
glPopMatrix();
glDisable(GL_POINT_SPRITE_OES);
PVRTVec3 Force = PVRTVec3(f2vt(0.0f), f2vt(0.0f), f2vt(0.0f));
Force.x = f2vt(1000.0f*(float)PVRTFSIN(m_fRot*0.01f));
for(i = 0; i < m_i32NumParticles; ++i)
{
/*
Move the particle.
If the particle exceeds its lifetime, create a new one in its place.
*/
if(m_Particles[i].Step(f2vt(fStep), Force))
SpawnParticle(&m_Particles[i]);
}
// clean up render states
glDisable(GL_BLEND);
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
// Increase rotation angles
m_fRot += 1;
m_fRot2 = m_fRot + 36;
// Unbinds the vertex buffer if we are using OpenGL ES 1.1
glBindBuffer(GL_ARRAY_BUFFER, 0);
// Display info text.
m_Print3D.DisplayDefaultTitle("Particles", "Using point sprites", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occurred
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevant OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLESPVRScopeRemote::RenderScene()
{
CPPLProcessingScoped PPLProcessingScoped(m_psSPSCommsData,
__FUNCTION__, static_cast<unsigned int>(strlen(__FUNCTION__)), m_i32FrameCounter);
if(m_psSPSCommsData)
{
// mark every N frames
if(!(m_i32FrameCounter % 100))
{
char buf[128];
const int nLen = sprintf(buf, "frame %u", m_i32FrameCounter);
m_bCommsError |= !pplSendMark(m_psSPSCommsData, buf, nLen);
}
// Check for dirty items
m_bCommsError |= !pplSendProcessingBegin(m_psSPSCommsData, "dirty", static_cast<unsigned int>(strlen("dirty")), m_i32FrameCounter);
{
unsigned int nItem, nNewDataLen;
const char *pData;
while(pplLibraryDirtyGetFirst(m_psSPSCommsData, &nItem, &nNewDataLen, &pData))
{
PVRShellOutputDebug("dirty item %u %u 0x%08x\n", nItem, nNewDataLen, pData);
switch(nItem)
{
case 0:
if(nNewDataLen == sizeof(SSPSCommsLibraryTypeFloat))
{
const SSPSCommsLibraryTypeFloat * const psData = (SSPSCommsLibraryTypeFloat*)pData;
m_fMinThickness = psData->fCurrent;
}
break;
case 1:
if(nNewDataLen == sizeof(SSPSCommsLibraryTypeFloat))
{
const SSPSCommsLibraryTypeFloat * const psData = (SSPSCommsLibraryTypeFloat*)pData;
m_fMaxVariation = psData->fCurrent;
}
break;
}
}
}
m_bCommsError |= !pplSendProcessingEnd(m_psSPSCommsData);
}
if (m_psSPSCommsData)
{
m_bCommsError |= !pplSendProcessingBegin(m_psSPSCommsData, "draw", static_cast<unsigned int>(strlen("draw")), m_i32FrameCounter);
}
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Loads the projection matrix
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(m_mProjection.f);
// Specify the modelview matrix
PVRTMat4 mModel;
SPODNode& Node = m_Scene.pNode[0];
m_Scene.GetWorldMatrix(mModel, Node);
// Rotate and Translate the model matrix
m_fAngleY += (2*PVRT_PIf/60)/7;
// Set model view projection matrix
PVRTMat4 mModelView;
mModelView = m_mView * PVRTMat4::RotationY(m_fAngleY) * mModel;
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(mModelView.f);
/*
Load the light direction from the scene if we have one
*/
// Enables lighting. See BasicTnL for a detailed explanation
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
// Set light direction
PVRTVec4 vLightDirModel;
vLightDirModel = mModel.inverse() * PVRTVec4(1, 1, 1, 0);
glLightfv(GL_LIGHT0, GL_POSITION, (float*)&vLightDirModel.x);
// Enable the vertex position attribute array
glEnableClientState(GL_VERTEX_ARRAY);
// bind the texture
glBindTexture(GL_TEXTURE_2D, m_uiTexture);
/*
Now that the model-view matrix is set and the materials are ready,
call another function to actually draw the mesh.
*/
DrawMesh(Node.nIdx);
// Disable the vertex positions
glDisableClientState(GL_VERTEX_ARRAY);
if (m_psSPSCommsData)
{
m_bCommsError |= !pplSendProcessingEnd(m_psSPSCommsData);
m_bCommsError |= !pplSendProcessingBegin(m_psSPSCommsData, "Print3D", static_cast<unsigned int>(strlen("Print3D")), m_i32FrameCounter);
}
// Displays the demo name using the tools. For a detailed explanation, see the example IntroducingPVRTools
if(m_bCommsError)
{
m_Print3D.DisplayDefaultTitle("PVRScopeRemote", "Remote APIs\n\nError:\n PVRScopeComms failed\n Is PVRPerfServer connected?", ePVRTPrint3DSDKLogo);
m_bCommsError = false;
}
else
m_Print3D.DisplayDefaultTitle("PVRScopeRemote", "Remote APIs", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
if (m_psSPSCommsData)
{
m_bCommsError |= !pplSendProcessingEnd(m_psSPSCommsData);
}
// send counters
m_anCounterReadings[eCounter] = m_i32FrameCounter;
m_anCounterReadings[eCounter10] = m_i32Frame10Counter;
if(m_psSPSCommsData)
{
m_bCommsError |= !pplCountersUpdate(m_psSPSCommsData, m_anCounterReadings);
}
// update some counters
++m_i32FrameCounter;
if(0 == (m_i32FrameCounter / 10) % 10)
{
m_i32Frame10Counter += 10;
}
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3IntroducingPOD::RenderScene()
{
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
/*
Calculates the frame number to animate in a time-based manner.
Uses the shell function PVRShellGetTime() to get the time in milliseconds.
*/
unsigned long ulTime = PVRShellGetTime();
if(m_ulTimePrev > ulTime)
m_ulTimePrev = ulTime;
unsigned long ulDeltaTime = ulTime - m_ulTimePrev;
m_ulTimePrev = ulTime;
m_fFrame += (float)ulDeltaTime * g_fDemoFrameRate;
if (m_fFrame > m_Scene.nNumFrame - 1) m_fFrame = 0;
// Sets the scene animation to this frame
m_Scene.SetFrame(m_fFrame);
/*
Get the direction of the first light from the scene.
*/
PVRTVec4 vLightDirection;
vLightDirection = m_Scene.GetLightDirection(0);
// For direction vectors, w should be 0
vLightDirection.w = 0.0f;
/*
Set up the view and projection matrices from the camera
*/
PVRTMat4 mView, mProjection;
PVRTVec3 vFrom, vTo(0.0f), vUp(0.0f, 1.0f, 0.0f);
float fFOV;
// Setup the camera
// Camera nodes are after the mesh and light nodes in the array
int i32CamID = m_Scene.pNode[m_Scene.nNumMeshNode + m_Scene.nNumLight + g_ui32Camera].nIdx;
// Get the camera position, target and field of view (fov)
if(m_Scene.pCamera[i32CamID].nIdxTarget != -1) // Does the camera have a target?
fFOV = m_Scene.GetCameraPos( vFrom, vTo, g_ui32Camera); // vTo is taken from the target node
else
fFOV = m_Scene.GetCamera( vFrom, vTo, vUp, g_ui32Camera); // vTo is calculated from the rotation
// We can build the model view matrix from the camera position, target and an up vector.
// For this we use PVRTMat4::LookAtRH()
mView = PVRTMat4::LookAtRH(vFrom, vTo, vUp);
// Calculate the projection matrix
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
mProjection = PVRTMat4::PerspectiveFovRH(fFOV, (float)PVRShellGet(prefWidth)/(float)PVRShellGet(prefHeight), g_fCameraNear, g_fCameraFar, PVRTMat4::OGL, bRotate);
/*
A scene is composed of nodes. There are 3 types of nodes:
- MeshNodes :
references a mesh in the pMesh[].
These nodes are at the beginning of the pNode[] array.
And there are nNumMeshNode number of them.
This way the .pod format can instantiate several times the same mesh
with different attributes.
- lights
- cameras
To draw a scene, you must go through all the MeshNodes and draw the referenced meshes.
*/
for (unsigned int i = 0; i < m_Scene.nNumMeshNode; ++i)
{
SPODNode& Node = m_Scene.pNode[i];
// Get the node model matrix
PVRTMat4 mWorld;
mWorld = m_Scene.GetWorldMatrix(Node);
// Pass the model-view-projection matrix (MVP) to the shader to transform the vertices
PVRTMat4 mModelView, mMVP;
mModelView = mView * mWorld;
mMVP = mProjection * mModelView;
glUniformMatrix4fv(m_ShaderProgram.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.f);
// Pass the light direction in model space to the shader
PVRTVec4 vLightDir;
vLightDir = mWorld.inverse() * vLightDirection;
PVRTVec3 vLightDirModel = *(PVRTVec3*)&vLightDir;
vLightDirModel.normalize();
glUniform3fv(m_ShaderProgram.uiLightDirLoc, 1, &vLightDirModel.x);
// Load the correct texture using our texture lookup table
GLuint uiTex = 0;
if(Node.nIdxMaterial != -1)
uiTex = m_puiTextureIDs[Node.nIdxMaterial];
glBindTexture(GL_TEXTURE_2D, uiTex);
/*
Now that the model-view matrix is set and the materials are ready,
call another function to actually draw the mesh.
*/
DrawMesh(i);
}
// Display the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("IntroducingPOD", "", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3AlphaBlend::RenderScene()
{
// Do our clear
glClear(GL_COLOR_BUFFER_BIT);
// Use the loaded shader program
glUseProgram(m_ShaderProgram.uiId);
// Draws the background
glDisable(GL_BLEND);
DrawQuad(-1, -1, +1, +1, m_uiTexBackground);
/*
Prepares to draw the different blend modes, activate blending.
Now we can use glBlendFunc() to specify the blending mode wanted.
*/
glEnable(GL_BLEND);
// Prepares the variables used to divide the screen in NUM_BLEND x NUM_BLEND rectangles
float fX1 = -1;
float fX2 = +1;
float fY1 = -1;
float fY2 = +.85f;
float fPosX = fX1;
float fPosY = fY1;
float fMarginX = .25f;
float fMarginY = .25f;
float fBlockWidth = ((fX2-fX1) - fMarginX * 3.0f) * 0.5f;
float fBlockHeight= ((fY2-fY1) - fMarginY * 3.0f) * 0.5f;
//Position and draw the first quad (Transparency)
fPosY = fY2 - fBlockHeight - fMarginY;
fPosX += fMarginX;
//Set up the blend function for this quad
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
DrawQuad(fPosX, fPosY, fPosX + fBlockWidth, fPosY + fBlockHeight, m_uiTexForeground);
//Draw the text for this quad to the screen.
m_Print3D.Print3D(18,12, 0.6f, 0xff00ffff, "Transparency");
m_Print3D.Print3D(7,16, 0.6f, 0xff00ffff, "(SRC_ALPHA, 1 - SRC_ALPHA)");
//Position and draw the second quad (Additive)
fPosX += fMarginX + fBlockWidth;
glBlendFunc(GL_ONE, GL_ONE);
DrawQuad(fPosX, fPosY, fPosX + fBlockWidth, fPosY + fBlockHeight, m_uiTexForeground);
m_Print3D.Print3D(66,12, 0.6f, 0xff00ffff, "Additive");
m_Print3D.Print3D(64,16, 0.6f, 0xff00ffff, "(ONE, ONE)");
//Position and draw the third quad (Modulate)
fPosX = fX1 + fMarginX;
fPosY -= fMarginY + fBlockHeight;
glBlendFunc(GL_DST_COLOR, GL_ZERO);
DrawQuad(fPosX, fPosY, fPosX + fBlockWidth, fPosY + fBlockHeight, m_uiTexForeground);
m_Print3D.Print3D(22,52, 0.6f, 0xff00ffff, "Modulate");
m_Print3D.Print3D(14,56, 0.6f, 0xff00ffff, "(DST_COLOR, ZERO)");
//Position and draw the fourth quad (Modulate X 2)
fPosX += fMarginX + fBlockWidth;
glBlendFunc(GL_DST_COLOR, GL_SRC_COLOR);
DrawQuad(fPosX, fPosY, fPosX + fBlockWidth, fPosY + fBlockHeight, m_uiTexForeground);
m_Print3D.Print3D(64,52, 0.6f, 0xff00ffff, "Modulate X2");
m_Print3D.Print3D(53,56, 0.6f, 0xff00ffff, "(DST_COLOR, SRC_COLOR)");
/* Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools */
m_Print3D.DisplayDefaultTitle("AlphaBlend", "", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLESEvilSkull::RenderScene()
{
unsigned int i;
float fCurrentfJawRotation, fCurrentfBackRotation;
float fFactor, fInvFactor;
// Update Skull Weights and Rotations using Animation Info
if(m_i32Frame > g_fExprTime)
{
m_i32Frame = 0;
m_i32BaseAnim = m_i32TargetAnim;
++m_i32TargetAnim;
if(m_i32TargetAnim > 6)
{
m_i32TargetAnim = 0;
}
}
fFactor = float(m_i32Frame) / g_fExprTime;
fInvFactor = 1.0f - fFactor;
m_fSkullWeights[0] = (m_fExprTable[0][m_i32BaseAnim] * fInvFactor) + (m_fExprTable[0][m_i32TargetAnim] * fFactor);
m_fSkullWeights[1] = (m_fExprTable[1][m_i32BaseAnim] * fInvFactor) + (m_fExprTable[1][m_i32TargetAnim] * fFactor);
m_fSkullWeights[2] = (m_fExprTable[2][m_i32BaseAnim] * fInvFactor) + (m_fExprTable[2][m_i32TargetAnim] * fFactor);
m_fSkullWeights[3] = (m_fExprTable[3][m_i32BaseAnim] * fInvFactor) + (m_fExprTable[3][m_i32TargetAnim] * fFactor);
fCurrentfJawRotation = m_fJawRotation[m_i32BaseAnim] * fInvFactor + (m_fJawRotation[m_i32TargetAnim] * fFactor);
fCurrentfBackRotation = m_fBackRotation[m_i32BaseAnim] * fInvFactor + (m_fBackRotation[m_i32TargetAnim] * fFactor);
// Update Base Animation Value - FrameBased Animation for now
++m_i32Frame;
// Update Skull Vertex Data using Animation Params
for(i = 0; i < m_Scene.pMesh[eSkull].nNumVertex * 3; ++i)
{
m_pMorphedVertices[i]= f2vt(m_pAVGVertices[i] + (m_pDiffVertices[0][i] * m_fSkullWeights[0]) \
+ (m_pDiffVertices[1][i] * m_fSkullWeights[1]) \
+ (m_pDiffVertices[2][i] * m_fSkullWeights[2]) \
+ (m_pDiffVertices[3][i] * m_fSkullWeights[3]));
}
// Buffer Clear
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Render Skull and Jaw Opaque with Lighting
glDisable(GL_BLEND); // Opaque = No Blending
glEnable(GL_LIGHTING); // Lighting On
// Set skull and jaw texture
glBindTexture(GL_TEXTURE_2D, m_ui32Texture[1]);
// Enable and set vertices, normals and index data
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
// Render Animated Jaw - Rotation Only
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
myglMultMatrix(m_mView.f);
myglTranslate(f2vt(0),f2vt(-50.0f),f2vt(-50.0f));
myglRotate(f2vt(-fCurrentfJawRotation), f2vt(1.0f), f2vt(0.0f), f2vt(0.0f));
myglRotate(f2vt(fCurrentfJawRotation) - f2vt(30.0f), f2vt(0), f2vt(1.0f), f2vt(-1.0f));
RenderJaw();
glPopMatrix();
// Render Morphed Skull
glPushMatrix();
myglRotate(f2vt(fCurrentfJawRotation) - f2vt(30.0f), f2vt(0), f2vt(1.0f), f2vt(-1.0f));
RenderSkull();
// Render Eyes and Background with Alpha Blending and No Lighting
glEnable(GL_BLEND); // Enable Alpha Blending
glDisable(GL_LIGHTING); // Disable Lighting
// Disable the normals as they aren't needed anymore
glDisableClientState(GL_NORMAL_ARRAY);
// Render Eyes using Skull Model Matrix
DrawQuad(-30.0f ,0.0f ,50.0f ,20.0f , m_ui32Texture[0]);
DrawQuad( 33.0f ,0.0f ,50.0f ,20.0f , m_ui32Texture[0]);
glPopMatrix();
// Render Dual Texture Background with different base color, rotation, and texture rotation
glPushMatrix();
glDisable(GL_BLEND); // Disable Alpha Blending
myglColor4(f2vt(0.7f+0.3f*((m_fSkullWeights[0]))), f2vt(0.7f), f2vt(0.7f), f2vt(1.0f)); // Animated Base Color
myglTranslate(f2vt(10.0f), f2vt(-50.0f), f2vt(0.0f));
myglRotate(f2vt(fCurrentfBackRotation*4.0f),f2vt(0),f2vt(0),f2vt(-1.0f)); // Rotation of Quad
// Animated Texture Matrix
glActiveTexture(GL_TEXTURE0);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
myglTranslate(f2vt(-0.5f), f2vt(-0.5f), f2vt(0.0f));
myglRotate(f2vt(fCurrentfBackRotation*-8.0f), f2vt(0), f2vt(0), f2vt(-1.0f));
myglTranslate(f2vt(-0.5f), f2vt(-0.5f), f2vt(0.0f));
// Draw Geometry
DrawDualTexQuad (0.0f ,0.0f ,-100.0f ,300.0f, m_ui32Texture[3], m_ui32Texture[2]);
// Disable Animated Texture Matrix
glActiveTexture(GL_TEXTURE0);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
// Make sure to disable the arrays
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
// Reset Colour
myglColor4(f2vt(1.0f), f2vt(1.0f), f2vt(1.0f), f2vt(1.0f));
// Display info text
m_Print3D.DisplayDefaultTitle("EvilSkull", "Morphing.", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2ShadowMapping::RenderScene()
{
//rotate light position
m_fLightAngle += 0.01f;
m_vLightPosition.x = m_fLightDistance * (float) cos(m_fLightAngle);
m_vLightPosition.z = m_fLightDistance * (float) sin(m_fLightAngle);
m_vLightDirection.x = -m_vLightPosition.x;
m_vLightDirection.z = -m_vLightPosition.z;
SetUpMatrices();
glEnable(GL_DEPTH_TEST);
// Bind the frame buffer object
glBindFramebuffer(GL_FRAMEBUFFER, m_uiFrameBufferObject);
if(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE)
{
// Clear the screen and depth buffer so we can render from the light's view
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Set the current viewport to our texture size
glViewport(0, 0, m_ui32ShadowMapSize, m_ui32ShadowMapSize);
// Since we don't care about colour when rendering the depth values to
// the shadow-map texture, we disable color writing to increase speed.
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
// Enable the simple shader for the light view pass. This render will not be shown to the user
// so only the simplest render needs to be implemented
glUseProgram(m_SimpleShaderProgram.uiId);
// Set the light projection matrix
glUniformMatrix4fv(m_SimpleShaderProgram.uiProjectionMatrixLoc, 1, GL_FALSE, m_LightProjection.f);
// Render the world according to the light's view
DrawScene(m_LightView);
// We can turn color writing back on since we already stored the depth values
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
// Restore our normal viewport size to our screen width and height
glViewport(0, 0,PVRShellGet(prefWidth),PVRShellGet(prefHeight));
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// Clear the colour and depth buffers, we are now going to render the scene again from scratch
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Load the shadow shader. This shader requires additional parameters; texProjMatrix for the depth buffer
// look up and the light direction for diffuse light (the effect is a lot nicer with the additon of the
// diffuse light).
glUseProgram(m_ShadowShaderProgram.uiId);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiShadowMapTexture);
glUniformMatrix4fv(m_ShadowShaderProgram.uiProjectionMatrixLoc, 1, GL_FALSE, m_Projection.f);
PVRTMat4 mViewInv, mTextureMatrix, mMatrix;
mViewInv = m_View.inverse();
// We need to calculate the texture projection matrix. This matrix takes the pixels from world space to previously rendered light projection space
//where we can look up values from our saved depth buffer. The matrix is constructed from the light view and projection matrices as used for the previous render and
//then multiplied by the inverse of the current view matrix.
mTextureMatrix = m_BiasMatrix * m_LightProjection * m_LightView * mViewInv;
glUniformMatrix4fv(m_ShadowShaderProgram.uiTexProjMatrixLoc, 1, GL_FALSE, mTextureMatrix.f);
DrawSceneWithShadow(m_View);
// Re-enable the simple shader to draw the light source object
glUseProgram(m_SimpleShaderProgram.uiId);
SPODNode& Node = m_Scene.pNode[1];
PVRTMat4 mWorld, mModelView;
m_Scene.GetWorldMatrix(mWorld, Node);
mWorld.f[12] = m_vLightPosition.x;
mWorld.f[13] = m_vLightPosition.y;
mWorld.f[14] = m_vLightPosition.z;
mModelView = m_View * mWorld;
glUniformMatrix4fv(m_SimpleShaderProgram.uiModelViewMatrixLoc, 1, GL_FALSE, mModelView.f);
glUniformMatrix4fv(m_SimpleShaderProgram.uiProjectionMatrixLoc, 1, GL_FALSE, m_LightProjection.f);
DrawMesh(1);
m_Print3D.DisplayDefaultTitle("ShadowMap", "", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3Refraction::RenderScene()
{
// Keyboard input (cursor to change Reflection Flag)
if (PVRShellIsKeyPressed(PVRShellKeyNameLEFT) || PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
m_bSpecular = !m_bSpecular;
}
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_Background.Draw(m_uiTexture);
// Enable backface culling and depth test
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind textures
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiTexture);
// Calculate the model matrix
PVRTMat4 mRotX, mRotY, mModel;
mRotX = PVRTMat4::RotationX(m_fAngleX);
mRotY = PVRTMat4::RotationY(m_fAngleY);
mModel = mRotX * mRotY;
m_fAngleX += PVRT_PI / 111;
m_fAngleY += PVRT_PI / 150;
// Set model view projection matrix
PVRTMat4 mModelView, mMVP;
mModelView = m_mView * mModel;
mMVP = m_mProjection * mModelView;
glUniformMatrix4fv(m_ShaderProgram.auiLoc[eMVPMatrix], 1, GL_FALSE, mMVP.ptr());
// Set light direction in model space
PVRTVec4 vLightDirModel;
vLightDirModel = mModelView.inverse() * PVRTVec4(0.57735f, 0.57735f, 0.57735f, 0);
glUniform3fv(m_ShaderProgram.auiLoc[eLightDirModel], 1, &vLightDirModel.x);
// Set eye position in model space
PVRTVec4 vEyePosModel;
vEyePosModel = mModelView.inverse() * PVRTVec4(0, 0, 0, 1);
glUniform3fv(m_ShaderProgram.auiLoc[eEyePosModel], 1, &vEyePosModel.x);
// Set specular flag
glUniform1i(m_ShaderProgram.auiLoc[eSpecular], m_bSpecular);
// Set rotation flag
glUniform1i(m_ShaderProgram.auiLoc[eRotate], m_bRotate);
/*
Now that the uniforms are set, call another function to actually draw the mesh.
*/
DrawMesh(0);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("Refraction", m_bSpecular ? "Specular reflection: on" : "Specular reflection: off", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occurred
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevant OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES3Skybox2::RenderScene()
{
unsigned int i, j;
// Clears the colour and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/*
Calculates the frame number to animate in a time-based manner.
Uses the shell function PVRShellGetTime() to get the time in milliseconds.
*/
unsigned long iTime = PVRShellGetTime();
if(!bPause)
{
// Calculate the model view matrix turning around the balloon
ComputeViewMatrix();
if(iTime > m_iTimePrev)
{
float fDelta = (float) (iTime - m_iTimePrev) * g_fFrameRate;
m_fFrame += fDelta;
fDemoFrame += fDelta;
fBurnAnim += fDelta * 0.02f;
if(fBurnAnim >= 1.0f)
fBurnAnim = 1.0f;
}
}
m_iTimePrev = iTime;
/* KeyBoard input processing */
if(PVRShellIsKeyPressed(PVRShellKeyNameACTION1))
bPause=!bPause;
if(PVRShellIsKeyPressed(PVRShellKeyNameACTION2))
fBurnAnim = 0.0f;
/* Keyboard Animation and Automatic Shader Change over time */
if(!bPause && (fDemoFrame > 500 || (m_i32Effect == 2 && fDemoFrame > 80)))
{
if(++m_i32Effect >= (int) g_ui32NoOfEffects)
{
m_i32Effect = 1;
m_fFrame = 0.0f;
}
fDemoFrame = 0.0f;
fBurnAnim = 0.0f;
}
/* Change Shader Effect */
if(PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
if(++m_i32Effect >= (int) g_ui32NoOfEffects)
m_i32Effect = 1;
fDemoFrame = 0.0f;
fBurnAnim = 0.0f;
m_fFrame = 0.0f;
}
if(PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
if(--m_i32Effect < 1)
m_i32Effect = g_ui32NoOfEffects - 1;
fDemoFrame = 0.0f;
fBurnAnim = 0.0f;
m_fFrame = 0.0f;
}
/* Change Skybox Texture */
if(PVRShellIsKeyPressed(PVRShellKeyNameUP))
{
for(i = 0; i < g_ui32NoOfEffects; ++i)
ChangeSkyboxTo(m_ppEffects[i], m_ui32TextureIDs[4]);
fBurnAnim = 0.0f;
}
if(PVRShellIsKeyPressed(PVRShellKeyNameDOWN))
{
for(i = 0; i < g_ui32NoOfEffects; ++i)
ChangeSkyboxTo(m_ppEffects[i], m_ui32TextureIDs[3]);
fBurnAnim = 0.0f;
}
/* Setup Shader and Shader Constants */
int location;
glDisable(GL_CULL_FACE);
DrawSkybox();
glEnable(GL_CULL_FACE);
m_ppEffects[m_i32Effect]->Activate();
for(i = 0; i < m_Scene.nNumMeshNode; i++)
{
SPODNode* pNode = &m_Scene.pNode[i];
// Gets pMesh referenced by the pNode
SPODMesh* pMesh = &m_Scene.pMesh[pNode->nIdx];
// Gets the node model matrix
PVRTMat4 mWorld, mWORLDVIEW;
mWorld = m_Scene.GetWorldMatrix(*pNode);
mWORLDVIEW = m_mView * mWorld;
glBindBuffer(GL_ARRAY_BUFFER, m_aiVboID[i]);
const CPVRTArray<SPVRTPFXUniform>& Uniforms = m_ppEffects[m_i32Effect]->GetUniformArray();
for(j = 0; j < Uniforms.GetSize(); ++j)
{
switch(Uniforms[j].nSemantic)
{
case ePVRTPFX_UsPOSITION:
{
glVertexAttribPointer(Uniforms[j].nLocation, 3, GL_FLOAT, GL_FALSE, pMesh->sVertex.nStride, pMesh->sVertex.pData);
glEnableVertexAttribArray(Uniforms[j].nLocation);
}
break;
case ePVRTPFX_UsNORMAL:
{
glVertexAttribPointer(Uniforms[j].nLocation, 3, GL_FLOAT, GL_FALSE, pMesh->sNormals.nStride, pMesh->sNormals.pData);
glEnableVertexAttribArray(Uniforms[j].nLocation);
}
break;
case ePVRTPFX_UsUV:
{
glVertexAttribPointer(Uniforms[j].nLocation, 2, GL_FLOAT, GL_FALSE, pMesh->psUVW[0].nStride, pMesh->psUVW[0].pData);
glEnableVertexAttribArray(Uniforms[j].nLocation);
}
break;
case ePVRTPFX_UsWORLDVIEWPROJECTION:
{
PVRTMat4 mMVP;
/* Passes the model-view-projection matrix (MVP) to the shader to transform the vertices */
mMVP = m_mProjection * mWORLDVIEW;
glUniformMatrix4fv(Uniforms[j].nLocation, 1, GL_FALSE, mMVP.f);
}
break;
case ePVRTPFX_UsWORLDVIEW:
{
glUniformMatrix4fv(Uniforms[j].nLocation, 1, GL_FALSE, mWORLDVIEW.f);
}
break;
case ePVRTPFX_UsWORLDVIEWIT:
{
PVRTMat4 mWORLDVIEWI, mWORLDVIEWIT;
mWORLDVIEWI = mWORLDVIEW.inverse();
mWORLDVIEWIT= mWORLDVIEWI.transpose();
PVRTMat3 WORLDVIEWIT = PVRTMat3(mWORLDVIEWIT);
glUniformMatrix3fv(Uniforms[j].nLocation, 1, GL_FALSE, WORLDVIEWIT.f);
}
break;
case ePVRTPFX_UsVIEWIT:
{
PVRTMat4 mViewI, mViewIT;
mViewI = m_mView.inverse();
mViewIT = mViewI.transpose();
PVRTMat3 ViewIT = PVRTMat3(mViewIT);
glUniformMatrix3fv(Uniforms[j].nLocation, 1, GL_FALSE, ViewIT.f);
}
break;
case ePVRTPFX_UsLIGHTDIREYE:
{
PVRTVec4 vLightDirectionEyeSpace;
// Passes the light direction in eye space to the shader
vLightDirectionEyeSpace = m_mView * PVRTVec4(1.0,1.0,-1.0,0.0);
glUniform3f(Uniforms[j].nLocation, vLightDirectionEyeSpace.x, vLightDirectionEyeSpace.y, vLightDirectionEyeSpace.z);
}
break;
case ePVRTPFX_UsTEXTURE:
{
// Set the sampler variable to the texture unit
glUniform1i(Uniforms[j].nLocation, Uniforms[j].nIdx);
}
break;
}
}
location = glGetUniformLocation(m_ppEffects[m_i32Effect]->GetProgramHandle(), "myEyePos");
if(location != -1)
glUniform3f(location, vCameraPosition.x, vCameraPosition.y, vCameraPosition.z);
//set animation
location = glGetUniformLocation(m_ppEffects[m_i32Effect]->GetProgramHandle(), "fAnim");
if(location != -1)
glUniform1f(location, fBurnAnim);
location = glGetUniformLocation(m_ppEffects[m_i32Effect]->GetProgramHandle(), "myFrame");
if(location != -1)
glUniform1f(location, m_fFrame);
if(g_bBlendShader[m_i32Effect])
{
glEnable(GL_BLEND);
// Correct render order for alpha blending through culling
// Draw Back faces
glCullFace(GL_FRONT);
location = glGetUniformLocation(m_ppEffects[m_i32Effect]->GetProgramHandle(), "bBackFace");
glUniform1i(location, 1);
DrawMesh(pMesh);
glUniform1i(location, 0);
glCullFace(GL_BACK);
}
else
{
location = glGetUniformLocation(m_ppEffects[m_i32Effect]->GetProgramHandle(), "bBackFace");
if(location != -1)
glUniform1i(location, 0);
glDisable(GL_BLEND);
}
/* Everything should now be setup, therefore draw the mesh*/
DrawMesh(pMesh);
glBindBuffer(GL_ARRAY_BUFFER, 0);
for(j = 0; j < Uniforms.GetSize(); ++j)
{
switch(Uniforms[j].nSemantic)
{
case ePVRTPFX_UsPOSITION:
{
glDisableVertexAttribArray(Uniforms[j].nLocation);
}
break;
case ePVRTPFX_UsNORMAL:
{
glDisableVertexAttribArray(Uniforms[j].nLocation);
}
break;
case ePVRTPFX_UsUV:
{
glDisableVertexAttribArray(Uniforms[j].nLocation);
}
break;
}
}
}
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
if(!bPause)
m_Print3D.DisplayDefaultTitle("Skybox2", "", ePVRTPrint3DSDKLogo);
else
m_Print3D.DisplayDefaultTitle("Skybox2", "Paused", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2PVRScopeRemote::RenderScene()
{
CPPLProcessingScoped PPLProcessingScoped(m_psSPSCommsData,
__FUNCTION__, static_cast<unsigned int>(strlen(__FUNCTION__)), m_i32FrameCounter);
if(m_psSPSCommsData)
{
// mark every N frames
if(!(m_i32FrameCounter % 100))
{
char buf[128];
const int nLen = sprintf(buf, "frame %u", m_i32FrameCounter);
m_bCommsError |= !pplSendMark(m_psSPSCommsData, buf, nLen);
}
// Check for dirty items
m_bCommsError |= !pplSendProcessingBegin(m_psSPSCommsData, "dirty", static_cast<unsigned int>(strlen("dirty")), m_i32FrameCounter);
{
unsigned int nItem, nNewDataLen;
const char *pData;
bool bRecompile = false;
while(pplLibraryDirtyGetFirst(m_psSPSCommsData, &nItem, &nNewDataLen, &pData))
{
PVRShellOutputDebug("dirty item %u %u 0x%08x\n", nItem, nNewDataLen, pData);
switch(nItem)
{
case 0:
delete [] m_pszFragShader;
m_pszFragShader = new char [nNewDataLen+1];
strncpy(m_pszFragShader, (char*)pData, nNewDataLen);
m_pszFragShader[nNewDataLen] = 0;
bRecompile = true;
break;
case 1:
delete [] m_pszVertShader;
m_pszVertShader = new char [nNewDataLen+1];
strncpy(m_pszVertShader, (char*)pData, nNewDataLen);
m_pszVertShader[nNewDataLen] = 0;
bRecompile = true;
break;
case 2:
if(nNewDataLen == sizeof(SSPSCommsLibraryTypeFloat))
{
const SSPSCommsLibraryTypeFloat * const psData = (SSPSCommsLibraryTypeFloat*)pData;
m_fMinThickness = psData->fCurrent;
}
break;
case 3:
if(nNewDataLen == sizeof(SSPSCommsLibraryTypeFloat))
{
const SSPSCommsLibraryTypeFloat * const psData = (SSPSCommsLibraryTypeFloat*)pData;
m_fMaxVariation = psData->fCurrent;
}
break;
}
}
if(bRecompile)
{
CPVRTString ErrorStr;
glDeleteProgram(m_ShaderProgram.uiId);
glDeleteShader(m_uiVertShader);
glDeleteShader(m_uiFragShader);
if (!LoadShaders(&ErrorStr, m_pszFragShader, m_pszVertShader))
{
PVRShellOutputDebug("%s", ErrorStr.c_str());
}
}
}
m_bCommsError |= !pplSendProcessingEnd(m_psSPSCommsData);
}
if (m_psSPSCommsData)
{
m_bCommsError |= !pplSendProcessingBegin(m_psSPSCommsData, "draw", static_cast<unsigned int>(strlen("draw")), m_i32FrameCounter);
}
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind texture
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiTexture);
// Rotate and Translation the model matrix
PVRTMat4 mModel;
mModel = PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += (2*PVRT_PI/60)/7;
// Set model view projection matrix
PVRTMat4 mModelView, mMVP;
mModelView = m_mView * mModel;
mMVP = m_mProjection * mModelView;
glUniformMatrix4fv(m_ShaderProgram.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.ptr());
// Set light direction in model space
PVRTVec4 vLightDirModel;
vLightDirModel = mModel.inverse() * PVRTVec4(1, 1, 1, 0);
glUniform3fv(m_ShaderProgram.uiLightDirLoc, 1, &vLightDirModel.x);
// Set eye position in model space
PVRTVec4 vEyePosModel;
vEyePosModel = mModelView.inverse() * PVRTVec4(0, 0, 0, 1);
glUniform3fv(m_ShaderProgram.uiEyePosLoc, 1, &vEyePosModel.x);
/*
Set the iridescent shading parameters
*/
// Set the minimum thickness of the coating in nm
glUniform1f(m_ShaderProgram.uiMinThicknessLoc, m_fMinThickness);
// Set the maximum variation in thickness of the coating in nm
glUniform1f(m_ShaderProgram.uiMaxVariationLoc, m_fMaxVariation);
/*
Now that the uniforms are set, call another function to actually draw the mesh.
*/
DrawMesh(0);
if (m_psSPSCommsData)
{
m_bCommsError |= !pplSendProcessingEnd(m_psSPSCommsData);
m_bCommsError |= !pplSendProcessingBegin(m_psSPSCommsData, "Print3D", static_cast<unsigned int>(strlen("Print3D")), m_i32FrameCounter);
}
// Displays the demo name using the tools. For a detailed explanation, see the example IntroducingPVRTools
if(m_bCommsError)
{
m_Print3D.DisplayDefaultTitle("PVRScopeRemote", "Remote APIs\n\nError:\n PVRScopeComms failed\n Is PVRPerfServer connected?", ePVRTPrint3DSDKLogo);
m_bCommsError = false;
}
else
m_Print3D.DisplayDefaultTitle("PVRScopeRemote", "Remote APIs", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
if (m_psSPSCommsData)
{
m_bCommsError |= !pplSendProcessingEnd(m_psSPSCommsData);
}
// send counters
m_anCounterReadings[eCounter] = m_i32FrameCounter;
m_anCounterReadings[eCounter10] = m_i32Frame10Counter;
if(m_psSPSCommsData)
{
m_bCommsError |= !pplCountersUpdate(m_psSPSCommsData, m_anCounterReadings);
}
// update some counters
++m_i32FrameCounter;
if(0 == (m_i32FrameCounter / 10) % 10)
{
m_i32Frame10Counter += 10;
}
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2AnisotropicLighting::RenderScene()
{
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Keyboard input (cursor to change render mode)
if (PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
m_eRenderMode = ERenderMode((m_eRenderMode + eNumRenderModes - 1) % eNumRenderModes);
}
if (PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
m_eRenderMode = ERenderMode((m_eRenderMode + 1) % eNumRenderModes);
}
// Rotate the model matrix
PVRTMat4 mModel = PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += 0.02f;
// Calculate model view projection matrix
PVRTMat4 mMVP = m_mViewProj * mModel;
if (m_eRenderMode == eTexLookup)
{
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiTexture);
glUseProgram(m_FastShader.uiId);
glUniformMatrix4fv(m_FastShader.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.ptr());
/*
The inverse of a rotation matrix is the transposed matrix
Because of v * M = transpose(M) * v, this means:
v * R == inverse(R) * v
So we don't have to actually invert or transpose the matrix
to transform back from world space to model space
*/
PVRTVec3 vMsEyePos = PVRTVec3(PVRTVec4(0, 0, 150, 1) * mModel);
glUniform3fv(m_FastShader.uiMsEyePosLoc, 1, vMsEyePos.ptr());
PVRTVec3 vMsLightDir = PVRTVec3(PVRTVec4(1, 1, 1, 1) * mModel).normalized();
glUniform3fv(m_FastShader.uiMsLightDirLoc, 1, vMsLightDir.ptr());
}
else
{
glUseProgram(m_SlowShader.uiId);
glUniformMatrix4fv(m_SlowShader.uiMVPMatrixLoc, 1, GL_FALSE, mMVP.ptr());
PVRTVec3 vMsEyeDir = PVRTVec3(PVRTVec4(0, 0, 150, 1) * mModel).normalized();
glUniform3fv(m_SlowShader.uiMsEyeDirLoc, 1, vMsEyeDir.ptr());
PVRTVec3 vMsLightDir = PVRTVec3(PVRTVec4(1, 1, 1, 1) * mModel).normalized();
glUniform3fv(m_SlowShader.uiMsLightDirLoc, 1, vMsLightDir.ptr());
}
/*
Now that the uniforms are set, call another function to actually draw the mesh.
*/
DrawMesh(0);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("AnisotropicLighting", "", ePVRTPrint3DLogoIMG);
m_Print3D.Print3D(0.3f, 7.5f, 0.75f, PVRTRGBA(255,255,255,255), c_aszRenderModes[m_eRenderMode]);
m_Print3D.Flush();
return true;
}
/*******************************************************************************
* Function Name : RenderScene
* Returns : true if no error occured
* Description : Main rendering loop function of the program. The shell will
* call this function every frame.
*******************************************************************************/
bool OGLESVase::RenderScene()
{
PVRTMat4 RotationMatrix, RotateX, RotateY;
// Increase rotation angles
m_fAngleX += VERTTYPEDIV(PVRT_PI, f2vt(100.0f));
m_fAngleY += VERTTYPEDIV(PVRT_PI, f2vt(150.0f));
if(m_fAngleX >= PVRT_PI)
m_fAngleX -= PVRT_TWO_PI;
if(m_fAngleY >= PVRT_PI)
m_fAngleY -= PVRT_TWO_PI;
// Clear the buffers
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Setup the vase rotation
// Calculate rotation matrix
RotateX = PVRTMat4::RotationX(m_fAngleX);
RotateY = PVRTMat4::RotationY(m_fAngleY);
RotationMatrix = RotateY * RotateX;
// Modelview matrix
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
myglTranslate(f2vt(0.0f), f2vt(0.0f), f2vt(-200.0f));
myglMultMatrix(RotationMatrix.f);
// Draw the scene
// Use PVRTools to draw a background image
m_Background.Draw(m_uiBackTex);
// Enable client states
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
// Enable depth test
glEnable(GL_DEPTH_TEST);
// Draw vase outer
glBindTexture(GL_TEXTURE_2D, m_pui32Textures[m_Scene.pNode[eVase].nIdxMaterial]);
DrawReflectiveMesh(m_Scene.pNode[eVase].nIdx, &RotationMatrix);
// Draw glass
glEnable(GL_BLEND);
glBindTexture(GL_TEXTURE_2D, m_pui32Textures[m_Scene.pNode[eGlass].nIdxMaterial]);
// Pass 1: only render back faces (model has reverse winding)
glFrontFace(GL_CW);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
DrawMesh(m_Scene.pNode[eGlass].nIdx);
// Pass 2: only render front faces (model has reverse winding)
glCullFace(GL_FRONT);
DrawMesh(m_Scene.pNode[eGlass].nIdx);
// Disable blending as it isn't needed
glDisable(GL_BLEND);
// Disable client states
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
// Display info text
m_Print3D.DisplayDefaultTitle("Vase", "Translucency and reflections.", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}
/*******************************************************************************
* Function Name : RenderScene
* Returns : true if no error occured
* Description : Main rendering loop function of the program. The shell will
* call this function every frame.
*******************************************************************************/
bool OGLESSkinning::RenderScene()
{
// Increase the frame number
m_fFrame += 0.3f;
while(m_fFrame > m_Scene.nNumFrame-1)
m_fFrame -= m_Scene.nNumFrame-1;
// Modify the transformation matrix if it is needed
bool bRebuildTransformation = false;
if(PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
m_fAngle -= 0.03f;
if(m_fAngle < PVRT_TWO_PIf)
m_fAngle += PVRT_TWO_PIf;
bRebuildTransformation = true;
}
if(PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
m_fAngle += 0.03f;
if(m_fAngle > PVRT_TWO_PIf)
m_fAngle -= PVRT_TWO_PIf;
bRebuildTransformation = true;
}
if(PVRShellIsKeyPressed(PVRShellKeyNameUP))
{
m_fDistance -= 10.0f;
if(m_fDistance < -500.0f)
m_fDistance = -500.0f;
bRebuildTransformation = true;
}
if(PVRShellIsKeyPressed(PVRShellKeyNameDOWN))
{
m_fDistance += 10.0f;
if(m_fDistance > 200.0f)
m_fDistance = 200.0f;
bRebuildTransformation = true;
}
if(bRebuildTransformation)
m_mTransform = PVRTMat4::Translation(0,0, m_fDistance) * PVRTMat4::RotationY(m_fAngle);
// Clear the depth and frame buffer
glClearColor(0.6f, 0.8f, 1.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Set Z compare properties
glEnable(GL_DEPTH_TEST);
// Disable Blending
glDisable(GL_BLEND);
// Calculate the model view matrix
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(m_mView.f);
// Draw the model
DrawModel();
// Print text on screen
m_Print3D.DisplayDefaultTitle("Skinning", "", ePVRTPrint3DSDKLogo);
// Flush all Print3D commands
m_Print3D.Flush();
return true;
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occured
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevent OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLESIntroducingPFX::RenderScene()
{
// Clears the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use the loaded effect
m_pEffect->Activate();
/*
Calculates the frame number to animate in a time-based manner.
Uses the shell function PVRShellGetTime() to get the time in milliseconds.
*/
int iTime = PVRShellGetTime();
int iDeltaTime = iTime - m_iTimePrev;
m_iTimePrev = iTime;
m_fFrame += (float)iDeltaTime * DEMO_FRAME_RATE;
if (m_fFrame > m_Scene.nNumFrame-1)
m_fFrame = 0;
// Sets the scene animation to this frame
m_Scene.SetFrame(m_fFrame);
{
PVRTVec3 vFrom, vTo, vUp;
VERTTYPE fFOV;
vUp.x = 0.0f;
vUp.y = 1.0f;
vUp.z = 0.0f;
// We can get the camera position, target and field of view (fov) with GetCameraPos()
fFOV = m_Scene.GetCameraPos(vFrom, vTo, 0) * 0.4f;
/*
We can build the world view matrix from the camera position, target and an up vector.
For this we use PVRTMat4LookAtRH().
*/
m_mView = PVRTMat4::LookAtRH(vFrom, vTo, vUp);
// Calculates the projection matrix
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
m_mProjection = PVRTMat4::PerspectiveFovRH(fFOV, (float)PVRShellGet(prefWidth)/(float)PVRShellGet(prefHeight), CAM_NEAR, CAM_FAR, PVRTMat4::OGL, bRotate);
}
/*
A scene is composed of nodes. There are 3 types of nodes:
- MeshNodes :
references a mesh in the pMesh[].
These nodes are at the beginning of the pNode[] array.
And there are nNumMeshNode number of them.
This way the .pod format can instantiate several times the same mesh
with different attributes.
- lights
- cameras
To draw a scene, you must go through all the MeshNodes and draw the referenced meshes.
*/
for (int i=0; i<(int)m_Scene.nNumMeshNode; i++)
{
SPODNode* pNode = &m_Scene.pNode[i];
// Gets pMesh referenced by the pNode
SPODMesh* pMesh = &m_Scene.pMesh[pNode->nIdx];
glBindBuffer(GL_ARRAY_BUFFER, m_aiVboID[i]);
// Gets the node model matrix
PVRTMat4 mWorld;
mWorld = m_Scene.GetWorldMatrix(*pNode);
PVRTMat4 mWorldView;
mWorldView = m_mView * mWorld;
for(unsigned int j = 0; j < m_nUniformCnt; ++j)
{
switch(m_psUniforms[j].nSemantic)
{
case eUsPOSITION:
{
glVertexAttribPointer(m_psUniforms[j].nLocation, 3, GL_FLOAT, GL_FALSE, pMesh->sVertex.nStride, pMesh->sVertex.pData);
glEnableVertexAttribArray(m_psUniforms[j].nLocation);
}
break;
case eUsNORMAL:
{
glVertexAttribPointer(m_psUniforms[j].nLocation, 3, GL_FLOAT, GL_FALSE, pMesh->sNormals.nStride, pMesh->sNormals.pData);
glEnableVertexAttribArray(m_psUniforms[j].nLocation);
}
break;
case eUsUV:
{
glVertexAttribPointer(m_psUniforms[j].nLocation, 2, GL_FLOAT, GL_FALSE, pMesh->psUVW[0].nStride, pMesh->psUVW[0].pData);
glEnableVertexAttribArray(m_psUniforms[j].nLocation);
}
break;
case eUsWORLDVIEWPROJECTION:
{
PVRTMat4 mWVP;
/* Passes the world-view-projection matrix (WVP) to the shader to transform the vertices */
mWVP = m_mProjection * mWorldView;
glUniformMatrix4fv(m_psUniforms[j].nLocation, 1, GL_FALSE, mWVP.f);
}
break;
case eUsWORLDVIEWIT:
{
PVRTMat4 mWorldViewI, mWorldViewIT;
/* Passes the inverse transpose of the world-view matrix to the shader to transform the normals */
mWorldViewI = mWorldView.inverse();
mWorldViewIT = mWorldViewI.transpose();
PVRTMat3 WorldViewIT = PVRTMat3(mWorldViewIT);
glUniformMatrix3fv(m_psUniforms[j].nLocation, 1, GL_FALSE, WorldViewIT.f);
}
break;
case eUsLIGHTDIREYE:
{
// Reads the light direction from the scene.
PVRTVec4 vLightDirection;
PVRTVec3 vPos;
vLightDirection = m_Scene.GetLightDirection(0);
vLightDirection.x = -vLightDirection.x;
vLightDirection.y = -vLightDirection.y;
vLightDirection.z = -vLightDirection.z;
/*
Sets the w component to 0, so when passing it to glLight(), it is
considered as a directional light (as opposed to a spot light).
*/
vLightDirection.w = 0;
// Passes the light direction in eye space to the shader
PVRTVec4 vLightDirectionEyeSpace;
vLightDirectionEyeSpace = m_mView * vLightDirection;
glUniform3f(m_psUniforms[j].nLocation, vLightDirectionEyeSpace.x, vLightDirectionEyeSpace.y, vLightDirectionEyeSpace.z);
}
break;
case eUsTEXTURE:
{
// Set the sampler variable to the texture unit
glUniform1i(m_psUniforms[j].nLocation, m_psUniforms[j].nIdx);
}
break;
}
}
/*
Now that the model-view matrix is set and the materials ready,
call another function to actually draw the mesh.
*/
DrawMesh(pMesh);
glBindBuffer(GL_ARRAY_BUFFER, 0);
for(unsigned int j = 0; j < m_nUniformCnt; ++j)
{
switch(m_psUniforms[j].nSemantic)
{
case eUsPOSITION:
{
glDisableVertexAttribArray(m_psUniforms[j].nLocation);
}
break;
case eUsNORMAL:
{
glDisableVertexAttribArray(m_psUniforms[j].nLocation);
}
break;
case eUsUV:
{
glDisableVertexAttribArray(m_psUniforms[j].nLocation);
}
break;
}
}
}
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("IntroducingPFX", "", ePVRTPrint3DLogoIMG);
m_Print3D.Flush();
return true;
}