/*!****************************************************************************
@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 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 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 RenderLoadingScene
@Input iFrame
@Description Renders an animated loading screen.
******************************************************************************/
void OGLES2MultiThreading::RenderLoadingScene(int iFrame)
{
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
float fHW = PVRShellGet(prefWidth) / 2.0f;
float fHH = PVRShellGet(prefHeight) / 2.0f;
PVRTMat4 mxProjection = PVRTMat4::Ortho(-fHW, fHH, fHW, -fHH, -1.0f, 1.0f, PVRTMat4::OGL, bRotate);
/*
Clears the color buffer.
*/
glClear(GL_COLOR_BUFFER_BIT);
// Actually use the created program
glUseProgram(handles.uiLoadProgram);
// First gets the location of that variable in the shader using its name
int i32MVPLocation = glGetUniformLocation(handles.uiLoadProgram, "myPMVMatrix");
int i32ColLocation = glGetUniformLocation(handles.uiLoadProgram, "myCol");
for(int iCircleIdx = 0; iCircleIdx < c_iNumCircles; ++iCircleIdx)
{
int iProg = iFrame+iCircleIdx*4;
float fScale = (0.75f + cos(iProg * 0.1f) * 0.25f);
float fY = sin(iProg * 0.1f) * 25.0f;
// Then passes the matrix to that variable
PVRTMat4 mxMVP = mxProjection * PVRTMat4::Translation(-175.0f + iCircleIdx * 50.0f, fY, 0.0f) * PVRTMat4::Scale(fScale,fScale,1.0f);
glUniformMatrix4fv(i32MVPLocation, 1, GL_FALSE, mxMVP.ptr());
// Pass the colour
glUniform3f(i32ColLocation, c_vCircleCols[iCircleIdx].x, c_vCircleCols[iCircleIdx].y, c_vCircleCols[iCircleIdx].z);
// Draw the loading circle
glBindBuffer(GL_ARRAY_BUFFER, handles.uiLoadVbo);
glEnableVertexAttribArray(VERTEX_ARRAY);
glVertexAttribPointer(VERTEX_ARRAY, 3, GL_FLOAT, GL_FALSE, 0, 0);
// Submit
glDrawArrays(GL_TRIANGLE_FAN, 0, c_iNumCirclePoints+2);
glDisableVertexAttribArray(VERTEX_ARRAY);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
float fW;
loadingText.SetProjection(mxProjection);
ELoadingProgress eProgress = eProgress_Init;
EnterCriticalSection(&handles.mutex);
eProgress = g_eProgress;
LeaveCriticalSection(&handles.mutex);
loadingText.MeasureText(&fW, NULL, 1.0f, c_pszLoadingProgress[eProgress]);
loadingText.Print3D(-fW*0.5f, -50.0f, 1.0f, 0xFFFFFFFF, c_pszLoadingProgress[eProgress]);
loadingText.Flush();
}
/*!****************************************************************************
@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 RenderTitle
@Input fFadeAmount
@Description Draws the title text.
*****************************************************************************/
void OGLES2IntroducingPrint3D::RenderTitle(float fFadeAmount)
{
unsigned int uiCol = (((unsigned int)(fFadeAmount * 255)) << 24) | 0x00FFFF;
float fW = PVRShellGet(prefWidth) * 0.5f;
float fH = PVRShellGet(prefHeight) * 0.5f;
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
/*
Print3D can optionally be provided with user-defined projection and modelview matrices
which allow custom layout of text. Here we are just providing a projection matrix
so that text can be placed in viewport coordinates, rather than the default, more
abstract coordinate system of 0.0-100.0.
*/
PVRTMat4 mProjection = PVRTMat4::Ortho(-fW, fH, fW, -fH, -1.0f, 1.0f, PVRTMat4::OGL, bRotate);
m_IntroText.SetProjection(mProjection);
/*
Using the MeasureText() method provided by Print3D, we can determine the bounding-box
size of a string of text. This can be useful for justify text centrally, as we are
doing here.
*/
float fLine1W = 0.0f;
float fLine2W = 0.0f;
m_IntroText.MeasureText(&fLine1W, NULL, 1.0f, "introducing");
m_IntroText.MeasureText(&fLine2W, NULL, 1.0f, "print3d");
/*
Display some text.
Print3D() function allows to draw text anywhere on the screen using any colour.
Param 1: Position of the text along X
Param 2: Position of the text along Y
Param 3: Scale of the text
Param 4: Colour of the text (0xAABBGGRR format)
Param 5: Formatted string (uses the same syntax as printf)
...
*/
m_IntroText.Print3D(-fLine1W*0.5f, 50.0f, 1.0f, uiCol, "introducing");
m_IntroText.Print3D(-fLine2W*0.5f, 0.0f, 1.0f, uiCol, "print3d");
// Tells Print3D to do all the pending text rendering now
m_IntroText.Flush();
}
void RudeText::Print(float x, float y, float scale, unsigned int color, const char * const pszFormat, ...)
{
va_list args;
char text[512];
va_start(args, pszFormat);
vsprintf(text, pszFormat, args);
va_end(args);
gTextPrint.Print3D(x, y, scale, color, text);
}
/*!****************************************************************************
@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 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 and relevant OS events.
The user has access to these events through an abstraction
layer provided by PVRShell.
******************************************************************************/
bool OGLES3EdgeDetection::RenderScene()
{
// Declares world orientation variables.
PVRTMat4 mWorld, mMVP;
// Updates the current time.
m_ulCurrentTime=PVRShellGetTime();
#ifdef SHOW_MAX_FPS
//Updates and checks framerate.
m_iFrameCount+=1;
if (m_ulCurrentTime-m_ulPreviousTimeFPS>=1000)
{
m_fFPS=(GLfloat)m_iFrameCount/(GLfloat)(m_ulCurrentTime-m_ulPreviousTimeFPS)*1000.0f;
m_ulPreviousTimeFPS=m_ulCurrentTime;
m_iFrameCount=0;
}
// Display fps data
m_Print3D.Print3D(2.0f, 10.0f, 0.75f, 0xff0000ff, "%i fps", (int)m_fFPS);
#endif
// Time dependant updates for the rotational velocity of the scene.
m_fAngleY += 0.0002f*PVRT_PI*(m_ulCurrentTime-m_ulPreviousTimeAngle);
m_ulPreviousTimeAngle=PVRShellGetTime();
// Render to our texture (bracketed for viewing convenience)
{
// Use the first shader program to perform the initial render of the mask.
glUseProgram(m_PreShader.uiId);
// Bind render-to-texture frame buffer and set the viewPort
glBindFramebuffer(GL_FRAMEBUFFER, m_uiFramebufferObject);
if(m_i32TexWidth != m_i32WinWidth || m_i32TexHeight != m_i32WinHeight)
glViewport(0, 0, m_i32TexWidth, m_i32TexHeight);
#if defined(__PALMPDK__)
// Enable writing to the alpha channel again as usually it is disabled so
// we don't blend with the video layer on webOS devices.
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
#endif
// Clear the color and depth buffer of our FBO
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Rotates the scene and sets the model-view-projection matrix
mWorld = PVRTMat4::RotationY(m_fAngleY);
mMVP = m_mR2TProjection * m_mR2TView * mWorld;
// Send the view matrix information to the shader.
glUniformMatrix4fv(m_PreShader.auiLoc[eMVPMatrix], 1, GL_FALSE, mMVP.f);
// Enable vertex attribute array
glEnableVertexAttribArray(eVERTEX_ARRAY);
//Enable depth testing and culling.
glEnable(GL_DEPTH_TEST);
glFrontFace(GL_CCW);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
// Draw our models by looping through each mesh as defined by nNumMesh.
for (unsigned int i=0; i<m_Scene.nNumMeshNode; i++)
{
DrawMesh(i);
}
// Unbind the VBO and index buffer.
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
//Invalidate the framebuffer attachments we don't need to avoid unnecessary copying to system memory
const GLenum attachment = GL_DEPTH_ATTACHMENT;
glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, &attachment);
}
// Bind the original frame buffer to draw to screen and set the Viewport.
glBindFramebuffer(GL_FRAMEBUFFER, m_i32OriginalFramebuffer);
if(m_i32TexWidth != m_i32WinWidth || m_i32TexHeight != m_i32WinHeight)
glViewport(0, 0, m_i32WinWidth, m_i32WinHeight);
// Clear the color and depth buffers for the screen.
glClear(GL_COLOR_BUFFER_BIT);
// Uses PVRShell input handling to update the line width in the edge detection shaders.
if (PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
m_fLineWidth++;
if (m_fLineWidth>10) m_fLineWidth=10;
}
if (PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
m_fLineWidth--;
if (m_fLineWidth<1) m_fLineWidth=1;
}
// Uses PVRShell input to choose which post shader program to use for post processing.
// Loops through all shaders defined in EPostShaders
if (PVRShellIsKeyPressed(PVRShellKeyNameUP))
{
if (m_uiShaderID==eNumPostShaders-1) m_uiShaderID=0;
else m_uiShaderID++;
}
else if (PVRShellIsKeyPressed(PVRShellKeyNameDOWN))
{
if (m_uiShaderID==0) m_uiShaderID=eNumPostShaders-1;
else m_uiShaderID--;
}
// Sets the shader based on the shader ID value, and sets the line width each frame (as it can change);
glUseProgram(m_PostShaders[m_uiShaderID].uiId);
glUniform2f(m_PostShaders[m_uiShaderID].auiLoc[ePixelSize],m_fLineWidth/(float)m_i32TexWidth,m_fLineWidth/(float)m_i32TexHeight);
/* Note: We do not need to pass any projection data to these shaders as they are used only to render a texture to a
full screen quad which is parallel with the viewport. The model meshes have already been positioned in the previous
shader and now only exist as a 2D image.*/
// Enable texture attribute array
glEnableVertexAttribArray(eTEXCOORD_ARRAY);
// Draw the fullscreen quad to render the screen to.
DrawQuad();
// Disable the vertex and texture attribute arrays
glDisableVertexAttribArray(eTEXCOORD_ARRAY);
glDisableVertexAttribArray(eVERTEX_ARRAY);
// Print the demo title, current post shader's name and the line width if applicable
m_Print3D.DisplayDefaultTitle("Edge Detection", "", ePVRTPrint3DSDKLogo);
m_Print3D.Print3D(5,80,1,0xff885500,g_aszPostShaderNames[m_uiShaderID]);
if (!strcmp(c_aszPostShaderDefines[m_uiShaderID][0],"EDGE_DETECTION"))
m_Print3D.Print3D(5,90,0.7f,0xff000055,"Line Width = %i", (int)m_fLineWidth);
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 OGLESIntroducingPVRTools::RenderScene()
{
// Clears the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Binds the loaded texture
glBindTexture(GL_TEXTURE_2D, m_uiTexture);
// Use the loaded shader program
glUseProgram(m_ShaderProgram.uiId);
/*
Creates the Model View Projection (MVP) matrix using the PVRTMat4 class from the tools.
The tools contain a complete set of functions to operate on 4x4 matrices.
*/
PVRTMat4 mMVP = PVRTMat4::Identity();
if(PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen)) // If the screen is rotated
mMVP = PVRTMat4::RotationZ(-1.57f);
/*
Pass this matrix to the shader.
The .m field of a PVRTMat4 contains the array of float used to
communicate with OpenGL ES.
*/
glUniformMatrix4fv(m_ShaderProgram.auiLoc[eMVPMatrix], 1, GL_FALSE, mMVP.ptr());
/*
Draw a triangle.
Please refer to the training course IntroducingPVRShell for a detailed explanation.
*/
// Bind the VBO
glBindBuffer(GL_ARRAY_BUFFER, m_ui32Vbo);
// Pass the vertex data
glEnableVertexAttribArray(VERTEX_ARRAY);
glVertexAttribPointer(VERTEX_ARRAY, 3, GL_FLOAT, GL_FALSE, m_ui32VertexStride, 0);
// Pass the texture coordinates data
glEnableVertexAttribArray(TEXCOORD_ARRAY);
glVertexAttribPointer(TEXCOORD_ARRAY, 2, GL_FLOAT, GL_FALSE, m_ui32VertexStride, (void*) (sizeof(GLfloat) * 3) /* Uvs start after the position */);
// Draws a non-indexed triangle array
glDrawArrays(GL_TRIANGLES, 0, 3);
/*
Display some text.
Print3D() function allows to draw text anywhere on the screen using any color.
Param 1: Position of the text along X (from 0 to 100 scale independent)
Param 2: Position of the text along Y (from 0 to 100 scale independent)
Param 3: Scale of the text
Param 4: Colour of the text (0xAABBGGRR format)
Param 5: Formated string (uses the same syntax as printf)
*/
m_Print3D.Print3D(8.0f, 30.0f, 1.0f, 0xFFAA4040, "example");
/*
DisplayDefaultTitle() writes a title and description text on the top left of the screen.
It can also display the PVR logo (ePVRTPrint3DLogoPVR), the IMG logo (ePVRTPrint3DLogoIMG) or both (ePVRTPrint3DLogoPVR | ePVRTPrint3DLogoIMG).
Set this last parameter to NULL not to display the logos.
*/
m_Print3D.DisplayDefaultTitle("IntroducingPVRTools", "Description", ePVRTPrint3DLogoIMG);
// Tells Print3D to do all the pending text rendering now
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 OGLESFur::RenderScene()
{
// Reset the states that print3D changes
glDisable(GL_CULL_FACE);
glEnable(GL_FOG);
glEnable(GL_LIGHT0);
glEnable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
// User input
bool bNewPage = false;
if(PVRShellIsKeyPressed(PVRShellKeyNameSELECT))
m_bPause = !m_bPause;
if(PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
if(--m_i32WndPage < 0)
m_i32WndPage = 5;
bNewPage = true;
}
if(PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
if(++m_i32WndPage > 5)
m_i32WndPage = 0;
bNewPage = true;
}
if(bNewPage)
{
switch(m_i32WndPage)
{
case 0:
m_bViewMode = false;
m_i32FurShellNo = 7;
break;
case 1:
m_bViewMode = true;
m_i32FurShellNo = 0;
break;
case 2:
m_bViewMode = true;
m_i32FurShellNo = 1;
break;
case 3:
m_bViewMode = true;
m_i32FurShellNo = 2;
break;
case 4:
m_bViewMode = true;
m_i32FurShellNo = 7;
break;
case 5:
m_bViewMode = false;
m_i32FurShellNo = 7;
break;
}
// Since the number of fur shells has changed, update them
UpdateFurShells();
}
// Clear
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Animation
DoAnimation();
// View matrix
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(m_mView.f);
// Enable the vertex and normal arrays
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
// Begin Scene
if(!m_bViewMode)
DrawEnvironment();
// Draw the Duck
DrawDuck();
// Display Paused if the app is paused
if(m_bPause)
m_Print3D.Print3D(78.0f, 2.0f, 1.0f, PVRTRGBA(255,255,255,255), "Paused");
// Disable the normals before our drawing of the print3D content
glDisableClientState(GL_NORMAL_ARRAY);
char szDesc[256];
snprintf(szDesc, 256, "Displaying %d shells", m_i32FurShellNo);
// Display the IMG logo
m_Print3D.DisplayDefaultTitle("Fur", szDesc, 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 OGLES2Iridescence::RenderScene()
{
// Keyboard input (cursor up/down to change thickness variation)
if (PVRShellIsKeyPressed(PVRShellKeyNameUP))
{
m_fMaxVariation += 1.0f;
}
else if (PVRShellIsKeyPressed(PVRShellKeyNameDOWN))
{
m_fMaxVariation = PVRT_MAX(0.0f, m_fMaxVariation - 1.0f);
}
// Keyboard input (cursor left/right to change minimum thickness)
if (PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
m_fMinThickness += 1.0f;
}
else if (PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
m_fMinThickness = PVRT_MAX(0.0f, m_fMinThickness - 1.0f);
}
// 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);
m_Print3D.Print3D(2.0f, 10.0f, 0.75f, 0xffffffff, "Minimum Thickness:");
m_Print3D.Print3D(2.0f, 15.0f, 0.75f, 0xffffffff, "%8.0f nm", m_fMinThickness);
m_Print3D.Print3D(2.0f, 20.0f, 0.75f, 0xffffffff, "Maximum Variation:");
m_Print3D.Print3D(2.0f, 25.0f, 0.75f, 0xffffffff, "%8.0f nm", m_fMaxVariation);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("Iridescence", "", ePVRTPrint3DLogoIMG);
m_Print3D.Flush();
return true;
}
/*!***************************************************************************
@Function RenderText
@Description Draws the 3D text and scrolls in to the screen.
*****************************************************************************/
void OGLES2IntroducingPrint3D::RenderText()
{
float fAspect = (float)PVRShellGet(prefWidth) / (float)PVRShellGet(prefHeight);
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
// Calculate the frame delta.
unsigned long ulNow = PVRShellGetTime();
if(m_ulPrevFrameT == 0) m_ulPrevFrameT = ulNow;
float fDT = (ulNow - m_ulPrevFrameT) * 0.001f;
m_ulPrevFrameT = ulNow;
// Calculate the FPS scale.
float fFPSScale = fDT / c_fTargetFPS;
// Move the text. Progressively speed up.
float fSpeedInc = 0.0f;
if(m_fTextOffset > 0.0f)
fSpeedInc = m_fTextOffset / TEXT_END_Y;
m_fTextOffset += (0.75f + (1.0f * fSpeedInc)) * fFPSScale;
if(m_fTextOffset > TEXT_END_Y)
m_fTextOffset = TEXT_START_Y;
PVRTMat4 mProjection = PVRTMat4::PerspectiveFovRH(0.7f, fAspect, 1.0f, 2000.0f, PVRTMat4::OGL, bRotate);
PVRTMat4 mScale = PVRTMat4::Scale(PVRTVec3(1.0f, -1.0f, 1.0f));
PVRTMat4 mCamera = PVRTMat4::LookAtRH(PVRTVec3(0.0f, -900.0f, 700.0f), PVRTVec3(0.0f,-200.0f,0.0f), PVRTVec3(0.0f,1.0f,0.0f));
PVRTMat4 mTrans = PVRTMat4::Translation(PVRTVec3(0.0f, m_fTextOffset, 0.0f));
PVRTMat4 mModelView = mCamera * mTrans;
float fStrWidth = 0.0f;
/*
Print3D can optionally be provided with user-defined projection and model-view matrices
which allow custom layout of text. Here we are proving both a projection and model-view
matrix. The projection matrix specified here uses perspective projection which will
provide the 3D effect. The model-view matrix positions the the text in world space
providing the 'camera' position and the scrolling of the text.
*/
m_CentralText.SetProjection(mProjection);
m_CentralText.SetModelView(mModelView);
/*
The previous method (RenderTitle()) explains the following functions in more detail
however put simply, we are looping the entire array of loaded text which is encoded
in UTF-8. Print3D batches this internally and the call to Flush() will render the
text to the frame buffer. We are also fading out the text over a certain distance.
*/
float fPos, fFade;
unsigned int uiCol;
for(unsigned int uiIndex = 0; uiIndex < m_TextLines.GetSize(); ++uiIndex)
{
fPos = (m_fTextOffset - (uiIndex * 36.0f));
fFade = 1.0f;
if(fPos > TEXT_FADE_START)
{
fFade = PVRTClamp(1.0f - ((fPos - TEXT_FADE_START) / (TEXT_FADE_END - TEXT_FADE_START)), 0.0f, 1.0f);
}
uiCol = (((unsigned int)(fFade * 255)) << 24) | 0x00FFFF;
m_CentralText.MeasureText(&fStrWidth, NULL, 1.0f, (const char*)m_TextLines[uiIndex]);
m_CentralText.Print3D(-(fStrWidth*0.5f), -(uiIndex * 36.0f), 1.0f, uiCol, (const char*)m_TextLines[uiIndex]);
}
m_CentralText.Flush();
}
/*!****************************************************************************
@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 OGLES2Refraction::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", "", ePVRTPrint3DLogoIMG);
m_Print3D.Print3D(0.3f, 7.5f, 0.75f, PVRTRGBA(255,255,255,255), "Specular reflection: %s", (m_bSpecular) ? "on" : "off" );
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 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 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 OGLES2IntroducingPrint3D::RenderScene()
{
// Clears the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
unsigned long ulCurrentTime = PVRShellGetTime() - m_ulStartTime;
// Draw star background
m_BG.Draw(m_uiStarTex);
// Render the 'Introducing Print3D' title for the first n seconds.
if(ulCurrentTime < INTRO_TIME)
{
float fFadeAmount = 1.0f;
// Fade in
if(ulCurrentTime < INTRO_FADE_TIME)
{
fFadeAmount = ulCurrentTime / (float)INTRO_FADE_TIME;
}
// Fade out
else if(ulCurrentTime > INTRO_TIME - INTRO_FADE_TIME)
{
fFadeAmount = 1.0f - ((ulCurrentTime - (INTRO_TIME - INTRO_FADE_TIME)) / (float)INTRO_FADE_TIME);
}
RenderTitle(fFadeAmount);
}
// Render the 3D text.
else
{
RenderText();
}
/*
Here we are passing in a wide-character string to Print3D function. This allows
Unicode to be compiled in to string-constants, which this code snippet
demonstrates.
Because we are not setting a projection or a model-view matrix the default projection
matrix is used.
*/
unsigned int uiTitleLang = (unsigned int) ((ulCurrentTime / 1000) / (TITLE_TIME / 1000)) % eLang_Size;
unsigned int uiNextLang = (uiTitleLang + 1) % eLang_Size;
unsigned int ulModTime = (unsigned int) ulCurrentTime % TITLE_TIME;
float fTitlePerc = 1.0f;
float fNextPerc = 0.0f;
if(ulModTime > TITLE_TIME - TITLE_FADE_TIME)
{
fTitlePerc = 1.0f - ((ulModTime - (INTRO_TIME - INTRO_FADE_TIME)) / (float)INTRO_FADE_TIME);
fNextPerc = 1.0f - fTitlePerc;
}
unsigned int uiTitleCol = (((unsigned int)(fTitlePerc * 255)) << 24) | 0xFFFFFF;
unsigned int uiNextCol = (((unsigned int)(fNextPerc * 255)) << 24) | 0xFFFFFF;
m_TitleText.Print3D(0, 0, 1, uiTitleCol, c_pwzTitles[uiTitleLang]);
m_TitleText.Print3D(0, 0, 1, uiNextCol, c_pwzTitles[uiNextLang]);
m_TitleText.Flush();
/*
DisplayDefaultTitle() writes a title and description text on the top left of the screen.
It can also display the PVR logo (ePVRTPrint3DLogoPowerVR), the IMG logo (ePVRTPrint3DLogoIMG) or both (ePVRTPrint3DLogoPowerVR | ePVRTPrint3DLogoIMG)
which is what we are using the function for here.
Set this last parameter to NULL not to display the logos.
Passing NULL for the first two parameters will not display any text.
*/
m_Print3D.DisplayDefaultTitle(NULL, NULL, ePVRTPrint3DSDKLogo);
// Tells Print3D to do all the pending text rendering now
m_Print3D.Flush();
return true;
}
