void ShaderShadowMapEngine::handleSpotLightEnter(
SpotLight *spotL, RenderAction *ract, SSMEngineData *data)
{
RenderPartition *parentPart = ract->getActivePartition();
// Real cosSpotCutOff = osgCos(spotL->getSpotCutOff());
Matrix matEyeToWorld (parentPart->getCameraToWorld());
Matrix matWorldToLight;
Matrix matEyeToLight;
calcSpotLightMatrices(matWorldToLight, matEyeToLight,
spotL, matEyeToWorld );
Real32 lightNear;
Real32 lightFar;
calcPointLightRange(spotL, 0.001f,
parentPart->getNear(), parentPart->getFar(),
lightNear, lightFar );
if(getShadowNear() != 0.f)
{
lightNear = getShadowNear();
}
if(getShadowFar() != 0.f)
{
lightFar = getShadowFar();
}
Matrix matLightProj;
Matrix matLightProjTrans;
MatrixPerspective(matLightProj,
spotL->getSpotCutOff(), 1.f,
lightNear, lightFar );
updateShadowTexImage (data);
updateShadowTexBuffers(data);
updateRenderTargets (data);
Int32 shadowTexUnit = (this->getForceTextureUnit() > 0) ?
this->getForceTextureUnit() : 7;
ShaderProgram *shadowFP = this->getShadowFragmentProgram();
if(shadowFP == NULL)
{
ShaderProgramUnrecPtr newShadowFP = ShaderProgram::createLocal();
newShadowFP->setShaderType(GL_FRAGMENT_SHADER);
newShadowFP->setProgram (_spotFPCode );
newShadowFP->addUniformVariable("SSME_matEyeToLight", matEyeToLight);
newShadowFP->addUniformVariable("SSME_matLightProj", matLightProj );
newShadowFP->addUniformVariable("SSME_texShadow", shadowTexUnit);
this->setShadowFragmentProgram(newShadowFP);
shadowFP = newShadowFP;
}
else
{
shadowFP->updateUniformVariable("SSME_matEyeToLight", matEyeToLight);
shadowFP->updateUniformVariable("SSME_matLightProj", matLightProj );
}
commitChanges();
this->pushPartition(ract);
{
RenderPartition *part = ract->getActivePartition( );
Window *win = ract->getWindow ( );
FrameBufferObject *target = data->getRenderTargets (0);
Background *back = data->getBackground ( );
part->setRenderTarget(target);
part->setWindow (win );
part->calcViewportDimension(0.f, 0.f, 1.f, 1.f,
target->getWidth (),
target->getHeight() );
part->setupProjection(matLightProj, matLightProjTrans);
part->setupViewing (matWorldToLight );
part->setNear (parentPart->getNear());
part->setFar (parentPart->getFar ());
part->calcFrustum ( );
part->setBackground (back );
// force material for shadow map generation
part->overrideMaterial(data->getLightPassMaterials(0),
ract->getActNode ( ) );
this->recurseFrom(ract, spotL);
ract->useNodeList(false );
// undo override
part->overrideMaterial(NULL,
ract->getActNode ( ) );
}
this->popPartition(ract);
}
void ShaderShadowMapEngine::handlePointLightEnter(
PointLight *pointL, RenderAction *ract, SSMEngineData *data)
{
RenderPartition *parentPart = ract->getActivePartition();
Matrix matEyeToWorld(parentPart->getCameraToWorld());
Matrix matLightProj;
Real32 lightNear;
Real32 lightFar;
calcPointLightRange(pointL, 0.001f,
parentPart->getNear(), parentPart->getFar(),
lightNear, lightFar );
MatrixPerspective(matLightProj, Pi / 4.f, 1.f,
lightNear, lightFar );
Matrix matWorldToLight;
Matrix matEyeToLight;
calcPointLightMatrices(matWorldToLight, matEyeToLight,
pointL, matEyeToWorld );
updatePointLightShadowTexImage (data);
updatePointLightShadowTexBuffers(data);
updatePointLightRenderTargets (data);
Int32 shadowTexUnit = (this->getForceTextureUnit() > 0) ?
this->getForceTextureUnit() : 7;
ShaderProgram *shadowFP = this->getShadowFragmentProgram();
if(shadowFP == NULL)
{
ShaderProgramUnrecPtr newShadowFP = ShaderProgram::createLocal();
newShadowFP->setShaderType(GL_FRAGMENT_SHADER);
newShadowFP->setProgram (_pointFPCode );
newShadowFP->addUniformVariable("SSME_matEyeToLight", matEyeToLight);
newShadowFP->addUniformVariable("SSME_matLightProj", matLightProj );
newShadowFP->addUniformVariable("SSME_texShadow", shadowTexUnit);
this->setShadowFragmentProgram(newShadowFP);
shadowFP = newShadowFP;
}
else
{
shadowFP->updateUniformVariable("SSME_matEyeToLight", matEyeToLight);
shadowFP->updateUniformVariable("SSME_matLightProj", matLightProj );
}
commitChanges();
// schedule rendering of cube faces
for(UInt16 i = 0; i < 6; ++i)
{
Matrix matWorldToLightFace(matWorldToLight);
matWorldToLightFace.multLeft(_matCubeFaceInv[i]);
this->pushPartition(ract);
{
RenderPartition *part = ract->getActivePartition( );
Window *win = ract->getWindow ( );
FrameBufferObject *target = data->getRenderTargets (i);
Background *back = data->getBackground ( );
part->setRenderTarget(target);
part->setWindow (win );
part->calcViewportDimension(0.f, 0.f, 1.f, 1.f,
target->getWidth (),
target->getHeight() );
part->setupProjection(matLightProj, Matrix::identity());
part->setupViewing (matWorldToLightFace );
part->setNear (parentPart->getNear());
part->setFar (parentPart->getFar ());
part->calcFrustum ( );
part->setBackground (back );
// force material for shadow map generation
part->overrideMaterial(data->getLightPassMaterials(0),
ract->getActNode ( ) );
this->recurseFrom(ract, pointL);
ract->useNodeList(false );
// undo override
part->overrideMaterial(NULL,
ract->getActNode ( ) );
}
this->popPartition(ract);
}
}
void TrapezoidalShadowMapEngine::handlePointLightEnter(
PointLight *pointL, RenderAction *ract, TSMEngineData *data)
{
RenderPartition *parentPart = ract->getActivePartition();
Matrixr matEyeToWorld(parentPart->getCameraToWorld());
Matrixr matLightProj;
Real shadowNear = (getShadowNear() != 0.f ?
getShadowNear() :
parentPart->getNear() );
Real shadowFar = (getShadowFar () != 0.f ?
getShadowFar () :
parentPart->getFar() );
Inherited::calcPointLightRange(
pointL, 0.01f,
shadowNear, shadowFar, shadowNear, shadowFar);
MatrixPerspective(matLightProj, Pi / 4.f, 1.f,
shadowNear, shadowFar );
Matrixr matWorldToLight;
Matrixr matEyeToLight;
MFMatrixr mfMatNT;
mfMatNT.resize(6);
Inherited::calcPointLightMatrices(matWorldToLight, matEyeToLight,
pointL, matEyeToWorld );
Inherited::updatePointLightShadowTexImage (data);
Inherited::updatePointLightShadowTexBuffers(data);
Inherited::updatePointLightRenderTargets (data);
Int32 shadowTexUnit = (this->getForceTextureUnit() >= 0) ?
this->getForceTextureUnit() : 7;
ShaderProgram *shadowFP = this->getShadowFragmentProgram();
if(shadowFP == NULL)
{
ShaderProgramUnrecPtr newShadowFP = ShaderProgram::createLocal();
newShadowFP->setShaderType(GL_FRAGMENT_SHADER);
newShadowFP->setProgram (_pointFPCode );
newShadowFP->addUniformVariable("TSME_matEyeToLight", matEyeToLight);
newShadowFP->addUniformVariable("TSME_matLightProj", matLightProj );
newShadowFP->addUniformVariable("TSME_matNT", mfMatNT );
newShadowFP->addUniformVariable("TSME_texShadow", shadowTexUnit);
newShadowFP->addUniformVariable("TSME_texShadowSizeInv",
Vec2f(1.f / getWidth (),
1.f / getHeight() ) );
this->setShadowFragmentProgram(newShadowFP);
shadowFP = newShadowFP;
}
else
{
shadowFP->updateUniformVariable("TSME_matEyeToLight", matEyeToLight);
shadowFP->updateUniformVariable("TSME_matLightProj", matLightProj );
}
const FrustumVolume &eyeFrust = parentPart->getFrustum();
for(UInt16 faceIdx = 0; faceIdx < 6; ++faceIdx)
{
Matrixr matWorldToLightFace (matWorldToLight );
matWorldToLightFace.multLeft(_matCubeFaceInv[faceIdx]);
Matrixr matLightFull(matWorldToLightFace);
matLightFull.multLeft(matLightProj);
FrustumVolume lightFrust;
Matrixr matNT;
lightFrust.setPlanes(matLightFull);
bool matNTValid =
calcTrapezoidalTransform(mfMatNT[faceIdx],
matEyeToWorld, matLightFull,
eyeFrust, lightFrust );
if(matNTValid == false)
{
// setup a minimal partition to clear the cube face
commitChanges();
this->pushPartition(ract,
RenderPartition::CopyNothing,
RenderPartition::SimpleCallback);
{
RenderPartition *part = ract->getActivePartition( );
Window *win = ract->getWindow ( );
FrameBufferObject *target = data->getRenderTargets (faceIdx);
Background *back = data->getBackground ( );
part->setSetupMode(RenderPartition::ViewportSetup |
RenderPartition::BackgroundSetup );
part->setRenderTarget(target);
part->setWindow (win );
part->calcViewportDimension(0.f, 0.f, 1.f, 1.f,
target->getWidth (),
target->getHeight() );
part->setBackground(back);
RenderPartition::SimpleDrawCallback emptyCubeFaceDraw =
boost::bind(
&TrapezoidalShadowMapEngine::emptyCubeFaceDrawFunc,
this, _1);
part->dropFunctor(emptyCubeFaceDraw);
}
this->popPartition(ract);
}
else
{
updateLightPassMaterial(data, faceIdx, mfMatNT[faceIdx]);
commitChanges();
this->pushPartition(ract);
{
RenderPartition *part = ract->getActivePartition( );
Window *win = ract->getWindow ( );
FrameBufferObject *target = data->getRenderTargets (faceIdx);
Background *back = data->getBackground ( );
part->setRenderTarget(target);
part->setWindow (win );
part->calcViewportDimension(0.f, 0.f, 1.f, 1.f,
target->getWidth (),
target->getHeight() );
part->setupProjection(matLightProj, Matrixr::identity());
part->setupViewing (matWorldToLightFace );
part->setNear (parentPart->getNear());
part->setFar (parentPart->getFar ());
part->setFrustum (lightFrust );
part->setBackground (back );
part->overrideMaterial(data->getLightPassMaterials(faceIdx),
ract->getActNode ( ) );
this->recurseFrom(ract, pointL);
ract->useNodeList(false );
part->overrideMaterial(NULL,
ract->getActNode ( ) );
}
this->popPartition(ract);
}
}
shadowFP->updateUniformVariable("TSME_matNT", mfMatNT);
}
void TrapezoidalShadowMapEngine::handleSpotLightEnter(
SpotLight *spotL, RenderAction *ract, TSMEngineData *data)
{
RenderPartition *parentPart = ract->getActivePartition();
Matrixr matEyeToWorld(parentPart->getCameraToWorld());
Matrixr matWorldToLight;
Matrixr matEyeToLight;
Inherited::calcSpotLightMatrices(matWorldToLight, matEyeToLight,
spotL, matEyeToWorld );
Matrixr matLightProj;
Matrixr matLightFull(matWorldToLight);
Real shadowNear = (getShadowNear() != 0.f ?
getShadowNear() :
parentPart->getNear() );
Real shadowFar = (getShadowFar () != 0.f ?
getShadowFar () :
parentPart->getFar() );
Inherited::calcPointLightRange(
spotL, 0.01f,
shadowNear, shadowFar, shadowNear, shadowFar);
MatrixPerspective(matLightProj,
spotL->getSpotCutOff(), 1.f,
shadowNear, shadowFar );
matLightFull.multLeft(matLightProj);
Inherited::updateShadowTexImage (data);
Inherited::updateShadowTexBuffers(data);
Inherited::updateRenderTargets (data);
const FrustumVolume &eyeFrust = parentPart->getFrustum();
FrustumVolume lightFrust;
Matrixr matNT;
lightFrust.setPlanes(matLightFull);
bool matNTValid = calcTrapezoidalTransform(matNT,
matEyeToWorld, matLightFull,
eyeFrust, lightFrust );
if(matNTValid == false)
return;
// Real cosSpotCutOff = osgCos(spotL->getSpotCutOff());
Int32 shadowTexUnit = (this->getForceTextureUnit() >= 0) ?
this->getForceTextureUnit() : 7;
ShaderProgram *shadowFP = this->getShadowFragmentProgram();
if(shadowFP == NULL)
{
ShaderProgramUnrecPtr newShadowFP = ShaderProgram::createLocal();
newShadowFP->setShaderType(GL_FRAGMENT_SHADER);
newShadowFP->setProgram (_spotFPCode );
newShadowFP->addUniformVariable("TSME_matEyeToLight", matEyeToLight);
newShadowFP->addUniformVariable("TSME_matLightProj", matLightProj );
newShadowFP->addUniformVariable("TSME_matNT", matNT );
newShadowFP->addUniformVariable("TSME_texShadow", shadowTexUnit);
newShadowFP->addUniformVariable("TSME_texShadowSizeInv",
Vec2f(1.f / getWidth (),
1.f / getHeight() ) );
this->setShadowFragmentProgram(newShadowFP);
shadowFP = newShadowFP;
}
else
{
shadowFP->updateUniformVariable("TSME_matEyeToLight", matEyeToLight);
shadowFP->updateUniformVariable("TSME_matLightProj", matLightProj );
shadowFP->updateUniformVariable("TSME_matNT", matNT );
}
updateLightPassMaterial(data, 0, matNT);
commitChanges();
this->pushPartition(ract);
{
RenderPartition *part = ract->getActivePartition( );
Window *win = ract->getWindow ( );
FrameBufferObject *target = data->getRenderTargets (0);
Background *back = data->getBackground ( );
part->setRenderTarget(target);
part->setWindow (win );
part->calcViewportDimension(0.f, 0.f, 1.f, 1.f,
target->getWidth (),
target->getHeight() );
part->setupProjection(matLightProj, Matrixr::identity());
part->setupViewing (matWorldToLight );
part->setNear (parentPart->getNear());
part->setFar (parentPart->getFar ());
part->setFrustum (lightFrust );
part->setBackground (back );
part->overrideMaterial(data->getLightPassMaterials(0),
ract->getActNode ( ) );
this->recurseFrom(ract, spotL);
ract->useNodeList(false );
part->overrideMaterial(NULL,
ract->getActNode ( ) );
}
this->popPartition(ract);
}
void VRShadowEngine::setupCamera(Light *pLight,
LightTypeE eType,
RenderAction *pAction,
EngineDataPtr pEngineData)
{
if(eType == Directional)
{
DirectionalLight *pDLight =
dynamic_cast<DirectionalLight *>(pLight);
MatrixCameraUnrecPtr pCam =
dynamic_cast<MatrixCamera *>(pEngineData->getCamera());
if(pCam == NULL)
{
pCam = MatrixCamera::createLocal();
pEngineData->setCamera(pCam);
}
Vec3f diff;
Pnt3f center;
Matrix transMatrix;
Node *pNode = pAction->getActNode();
// tmpDir = DirectionalLightPtr::dcast(_lights[i]);
diff = (pNode->getVolume().getMax() -
pNode->getVolume().getMin());
Real32 sceneWidth = diff.length() * 0.5f;
// Not final values. May get tweaked in the future
Real32 sceneHeight = diff.length() * 0.5f;
pNode->getVolume().getCenter(center);
Vec3f lightdir = pDLight->getDirection();
if(pLight->getBeacon() != NULL)
{
Matrix m = pLight->getBeacon()->getToWorld();
m.mult(lightdir, lightdir);
}
MatrixLookAt(transMatrix,
center + lightdir,
center,
Vec3f(0,1,0));
transMatrix.invert();
Matrix proMatrix;
proMatrix.setIdentity();
MatrixOrthogonal( proMatrix,
-sceneWidth, sceneWidth, -sceneHeight,
sceneHeight, -sceneWidth, sceneWidth);
pCam->setProjectionMatrix(proMatrix );
pCam->setModelviewMatrix (transMatrix);
}
else if(eType == Point)
{
PointLight *pPLight = dynamic_cast<PointLight *>(pLight);
MatrixCameraUnrecPtr pCam =
dynamic_cast<MatrixCamera *>(pEngineData->getCamera());
if(pCam == NULL)
{
pCam = MatrixCamera::createLocal();
pEngineData->setCamera(pCam);
}
Real32 angle;
Vec3f dist;
Pnt3f center;
Vec3f diff;
Matrix transMatrix;
Node *pNode = pAction->getActNode();
pNode->getVolume().getCenter(center);
Pnt3f lightpos = pPLight->getPosition();
if(pLight->getBeacon() != NULL)
{
Matrix m = pLight->getBeacon()->getToWorld();
m.mult(lightpos, lightpos);
}
MatrixLookAt(transMatrix,
lightpos,
center,
Vec3f(0,1,0));
transMatrix.invert();
diff = (pNode->getVolume().getMax() -
pNode->getVolume().getMin());
dist = lightpos - center;
angle = atan((diff.length() * 0.5) / dist.length());
Matrix proMatrix;
proMatrix.setIdentity();
MatrixPerspective( proMatrix,
2.f * angle,
1,
pAction->getActivePartition()->getNear(),
pAction->getActivePartition()->getFar ());
pCam->setProjectionMatrix(proMatrix );
pCam->setModelviewMatrix (transMatrix);
}
}