void App::Render(const delta_t dt, const delta_t elapsed)
{
// clear buffer and save matrix state
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// position camera
mat4 camera;
cameraFrame.GetCameraMatrix(camera);
mv.PushMatrix(camera);
// create point light
vec4 vLightPos(sin(elapsed) * 10, 5, -8 + (cos(elapsed) * 15), 1);
vec4 vLightEyePos;
vec4 vAmbientColor(0.1f, 0.1f, 0.1f, 1);
vec4 vDiffuseColor(1, 1, 1, 1);
vec4 vSpecularColor(1, 1, 1, 1);
// use smoothstep to animate the cube movement
static float xPos;
xPos = ((float)sin(elapsed * 3.1) + 1.0f) / 2.0f;
xPos = (xPos) * (xPos) * (3.0f - 2.0f * (xPos));
xPos = (-1.5f * xPos) + (1.5f * (1.0f - xPos));
// copy uniform information to shader
GL_DEBUG(glUseProgram(phongShader));
vLightEyePos = mv.Transform(vLightPos);
GL_DEBUG(glUniformMatrix3fv(locNM , 1, GL_FALSE, transform.GetNormalMatrix() ));
GL_DEBUG(glUniformMatrix4fv(locMV , 1, GL_FALSE, transform.GetModelView() ));
GL_DEBUG(glUniformMatrix4fv(locMVP, 1, GL_FALSE, transform.GetMVP() ));
GL_DEBUG(glUniform4fv(locAmbient, 1, &vAmbientColor[0]));
GL_DEBUG(glUniform4fv(locDiffuse, 1, &vDiffuseColor[0]));
GL_DEBUG(glUniform4fv(locSpecular, 1, &vSpecularColor[0]));
GL_DEBUG(glUniform3fv(locLightPos, 1, &vLightEyePos[0]));
GL_DEBUG(glUniform1i(locTexture, 0));
// render the floor
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, baseTexture);
base.Draw();
// transform modelview to rotate cube
mv.PushMatrix();
mat4 cubePos = translate(mat4(), vec3(xPos, -0.5f, -15.f));
cubePos = rotate(cubePos, 100.0f * (float)sin(elapsed), vec3(1.0f, 0.0f, 0.0f));
cubePos = rotate(cubePos, 20.0f * (float)elapsed, vec3(0.0f, 1.0f, 0.0f));
mv.MultMatrix(cubePos);
// copy uniform information to shader for cube
vLightEyePos = mv.Transform(vLightPos);
GL_DEBUG(glUniform3fv(locLightPos, 1, &vLightEyePos[0]));
GL_DEBUG(glUniformMatrix3fv(locNM , 1, GL_FALSE, transform.GetNormalMatrix() ));
GL_DEBUG(glUniformMatrix4fv(locMV , 1, GL_FALSE, transform.GetModelView() ));
GL_DEBUG(glUniformMatrix4fv(locMVP, 1, GL_FALSE, transform.GetMVP() ));
glBindTexture(GL_TEXTURE_2D, cubeTexture);
// render geometry
cube.Draw();
mv.PopMatrix();
// draw cube at light position
mv.PushMatrix();
cubePos = translate(mat4(), vLightPos.xyz());
mv.MultMatrix(cubePos);
vLightEyePos = mv.Transform(vLightPos);
GL_DEBUG(glUniform3fv(locLightPos, 1, &vLightEyePos[0]));
GL_DEBUG(glUniformMatrix3fv(locNM , 1, GL_FALSE, transform.GetNormalMatrix() ));
GL_DEBUG(glUniformMatrix4fv(locMV , 1, GL_FALSE, transform.GetModelView() ));
GL_DEBUG(glUniformMatrix4fv(locMVP, 1, GL_FALSE, transform.GetMVP() ));
glBindTexture(GL_TEXTURE_2D, cubeTexture);
cube.Draw();
mv.PopMatrix();
// draw a stationary cube
mv.PushMatrix();
cubePos = translate(mat4(), vec3(-5, 0, 0));
cubePos = rotate(cubePos, 45.0f, vec3(1, 0, 0));
mv.MultMatrix(cubePos);
vLightEyePos = mv.Transform(vLightPos);
GL_DEBUG(glUniform3fv(locLightPos, 1, &vLightEyePos[0]));
GL_DEBUG(glUniformMatrix3fv(locNM , 1, GL_FALSE, transform.GetNormalMatrix() ));
GL_DEBUG(glUniformMatrix4fv(locMV , 1, GL_FALSE, transform.GetModelView() ));
GL_DEBUG(glUniformMatrix4fv(locMVP, 1, GL_FALSE, transform.GetMVP() ));
glBindTexture(GL_TEXTURE_2D, cubeTexture);
cube.Draw();
mv.PopMatrix();
mv.PopMatrix();
// update blur frame textures
blurTimer += (float)dt;
if (blurTimer > BLUR_FRAME_DELAY)
{
// save frame buffer to pbo
glBindBuffer(GL_PIXEL_PACK_BUFFER, pbo);
glReadPixels(0, 0, g_App.GetWidth(), g_App.GetHeight(), GL_RGB, GL_UNSIGNED_BYTE, NULL);
glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
// save pixel buffer to texture and increment frame index
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo);
glActiveTexture(GL_TEXTURE0 + GetBlurFrame0());
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, g_App.GetWidth(), g_App.GetHeight(), 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
// reset iterator variables
blurTimer = 0;
AdvanceBlurFrame();
}
// use stored blur textures to generate frame
if (blurEnabled && moveBlur)
{
// render quad to the screen
mat4 ortho = glm::ortho(0.0f, (float)g_App.GetWidth(), 0.0f, (float)g_App.GetHeight());
glDisable(GL_DEPTH_TEST);
glUseProgram(blurShader);
glUniformMatrix4fv(locBlurMVP, 1, GL_FALSE, value_ptr(ortho));
glUniform1i(glGetUniformLocation(blurShader, "blurFrame0"), GetBlurFrame0());
glUniform1i(glGetUniformLocation(blurShader, "blurFrame1"), GetBlurFrame1());
glUniform1i(glGetUniformLocation(blurShader, "blurFrame2"), GetBlurFrame2());
glUniform1i(glGetUniformLocation(blurShader, "blurFrame3"), GetBlurFrame3());
screen.Draw();
glEnable(GL_DEPTH_TEST);
}
}
void VCoronaManager::RenderCorona (VCoronaCandidate& coronaCandidate, VTextureObject*& pTexture)
{
#ifdef SUPPORTS_CORONAS
VCoronaComponent *pCorona = coronaCandidate.m_pCorona;
VisRenderContext_cl* pContext = VisRenderContext_cl::GetCurrentContext();
VisLightSource_cl* pLight = (VisLightSource_cl*)pCorona->GetOwner();
hkvVec3 vLightPos(hkvNoInitialization);
pLight->GetVirtualPosition(vLightPos, pContext);
hkvVec3 vEyePos(hkvNoInitialization);
pContext->GetCamera()->GetPosition(vEyePos);
hkvVec3 vDir = pContext->GetCamera()->GetDirection();
// Corona texture
VTextureObject *pTex = pCorona->GetCoronaTexture();
if (pTex == NULL)
return;
if (pTexture != pTex)
{
pTexture = pTex;
Vision::RenderLoopHelper.BindMeshTexture(pTexture,0);
}
// Get light color
VColorRef color = pLight->GetColor();
hkvVec3 vDist = vLightPos - vEyePos;
float fEyeDist = vDir.dot(vDist);
//determine if camera is in light cone if the light is directional
float fDirectionalDampening = 1.0f;
if ( pLight->GetType() == VIS_LIGHT_SPOTLIGHT && pCorona->GetOnlyVisibleInSpotLight() )
{
fDirectionalDampening = 0.0f;
float fConeAngle = pLight->GetProjectionAngle();
float fConeLength = pLight->GetRadius();
hkvVec3 fConeDirection = pLight->GetDirection();
fConeDirection.normalize();
hkvVec3 vLightEyeDist = vEyePos - vLightPos;
//#2 check if the camera is inside the angle of the cone
float cosinusAngle = (vLightEyeDist/vLightEyeDist.getLength()).dot(fConeDirection);
float fDegree = hkvMath::acosDeg(cosinusAngle);
float normRadius = fDegree / (fConeAngle/2.0f);
if (normRadius < 1.0f)
{
//hardcoded falloff. For better performance, we avoid sampling the projection texture here.
const float fEpsilon = 64.0f/256.0f;
const float fQuadFactor = 1.0f/fEpsilon - 1.0f;
fDirectionalDampening = 1.0f / (1.0f + fQuadFactor*normRadius*normRadius);
// scale the function so that the value is exactly 0.0 at the edge and 1.0 in the center
fDirectionalDampening = (fDirectionalDampening - fEpsilon) / (1.0f - fEpsilon);
}
}
// Fog params
float fFogDampening = 1.0f;
if (pLight->GetType() != VIS_LIGHT_DIRECTED && Vision::World.IsLinearDepthFogEnabled())
{
const VFogParameters &fog = Vision::World.GetFogParameters();
float fFogStart = fog.fDepthStart;
float fFogEnd = fog.fDepthEnd;
float fFogFactor = (fFogEnd > fFogStart) ? ((fEyeDist - fFogStart) / (fFogEnd - fFogStart)) : 0.f;
fFogDampening = 1.0f - hkvMath::clamp(fFogFactor, 0.0f, 1.0f);
}
// Get corona rotation
float fRotation = 0.0f;
hkvVec4 vRotation(1.0f, 0.0f, 0.0f, 1.0f);
if (pCorona->CoronaFlags & VIS_CORONASCALE_ROTATING)
{
fRotation = hkvMath::mod (fEyeDist * 0.5f, 360.f);
vRotation.x = hkvMath::cosDeg (fRotation);
vRotation.y = -hkvMath::sinDeg (fRotation);
vRotation.z = -vRotation.y;
vRotation.w = vRotation.x;
}
// Texture dimensions
int iSizeX, iSizeY, depth;
pTex->GetTextureDimensions(iSizeX, iSizeY, depth);
hkvVec4 vScale(0.0f, 0.0f, 0.0f, 0.0f);
int iMainWidth, iMainHeight, iWidth, iHeight;
pContext->GetSize(iWidth, iHeight);
VisRenderContext_cl::GetMainRenderContext()->GetSize(iMainWidth, iMainHeight);
// Preserve texture aspect ratio
int iTexHeight = pTex->GetTextureHeight();
int iTexWidth = pTex->GetTextureWidth();
// Perspective scaling
// This scaling ensures roughly the same size on 720p as the old implementation.
vScale.z = iTexWidth * pCorona->CoronaScaling * 0.25f;
vScale.w = iTexHeight * pCorona->CoronaScaling * 0.25f;
// Screen-space scaling
// This scaling ensures roughly the same size on 720p as the old implementation.
const float fScaleFactor = pCorona->CoronaScaling * iMainHeight / 11.0f;
vScale.x = ((float)iTexWidth / 128.0f) * fScaleFactor * (float(iWidth) / float(iMainWidth));
vScale.y = ((float)iTexHeight / 128.0f) * fScaleFactor * (float(iHeight) / float(iMainHeight));
vScale.x *= 2.0f / iWidth;
vScale.y *= 2.0f / iHeight;
// Scale by visibility
if (pCorona->CoronaFlags & VIS_CORONASCALE_VISIBLEAREA)
{
vScale.x *= coronaCandidate.m_fCurrentVisibility;
vScale.y *= coronaCandidate.m_fCurrentVisibility;
vScale.z *= coronaCandidate.m_fCurrentVisibility;
vScale.w *= coronaCandidate.m_fCurrentVisibility;
}
VCompiledShaderPass* pShader = m_spCoronaTechnique->GetShader(0);
VShaderConstantBuffer *pVertexConstBuffer = pShader->GetConstantBuffer(VSS_VertexShader);
// xyz = worldspace position, w = 1.0 if VIS_CORONASCALE_DISTANCE is true, otherwise zero.
pVertexConstBuffer->SetSingleParameterF("coronaPosition", vLightPos.x, vLightPos.y, vLightPos.z, (pCorona->CoronaFlags & VIS_CORONASCALE_DISTANCE) ? 1.0f : 0.0f);
// xyz = light color, w = corona visibility.
pVertexConstBuffer->SetSingleParameterF("coronaColor", color.r/255.0f, color.g/255.0f, color.b/255.0f, coronaCandidate.m_fCurrentVisibility * fFogDampening * fDirectionalDampening);
// xyzw = 2x2 rotation matrix. float2x2 is not supported in shader model 2, so a float4 is used and multiplication is done manually in the shader.
pVertexConstBuffer->SetSingleParameterF("coronaRotation", vRotation.x, vRotation.y, vRotation.z, vRotation.w);
// xy = screen-space scaling. zw = view-space scaling.
pVertexConstBuffer->SetSingleParameterF("coronaScale", vScale.x, vScale.y, vScale.z, vScale.w);
Vision::RenderLoopHelper.RenderMeshes(pShader, VisMeshBuffer_cl::MB_PRIMTYPE_TRILIST, 0, 2, 6);
#endif
}
