OSG_BASE_DLLMAPPING
bool intersect(const FrustumVolume &frustum, const Volume &vol,
FrustumVolume::PlaneSet &inplanes)
{
Pnt3f min, max;
vol.getBounds(min, max);
const Plane *frust = frustum.getPlanes();
FrustumVolume::PlaneSet mask = 0x1;
// check the box against the 6 planes, adjust the inplanes set
// accordingly
for(Int32 i = 0; i < 6; i++, mask <<= 1)
{
if((inplanes & mask) != 0)
continue;
if(frust[i].isOutHalfSpace(min, max))
return false;
if(frust[i].isInHalfSpace(min, max))
inplanes |= mask;
}
return true;
}
void Camera::getFrustum(FrustumVolume& result, const Viewport& p)
{
Matrix mv,prt,pr;
getProjection (pr , p.getPixelWidth(), p.getPixelHeight());
getProjectionTranslation(prt, p.getPixelWidth(), p.getPixelHeight());
getViewing (mv , p.getPixelWidth(), p.getPixelHeight());
pr.mult(prt);
pr.mult(mv );
result.setPlanes(pr);
}
/*! Calculate the frustum of this camera's visible area (w,h instead port).
*/
void Camera::getFrustum(FrustumVolume& result,
UInt32 width, UInt32 height)
{
Matrix mv,prt,pr;
getProjection (pr , width, height);
getProjectionTranslation(prt, width, height);
getViewing (mv , width, height);
pr.mult(prt);
pr.mult(mv );
result.setPlanes(pr);
}
OSG_BASE_DLLMAPPING
bool intersect(const SphereVolume &sphere, const FrustumVolume &frustum)
{
const Plane *frust = frustum.getPlanes();
//check the center of the sphere with each plane of the frustum
for(Int32 i = 0; i < 6; i++)
{
if(frust[i].distance(sphere.getCenter()) < -sphere.getRadius())
return false;
}
return true;
}
OSG_BASE_DLLMAPPING
bool intersect(const CylinderVolume &cylinder, const FrustumVolume &frustum)
{
Pnt3f min, max;
cylinder.getBounds(min, max);
const Plane *frust = frustum.getPlanes();
// check each point of the box to the 6 planes
for(Int32 i = 0; i < 6; i++)
{
if(frust[i].isOutHalfSpace(min, max))
return false;
}
return true;
}
OSG_BEGIN_NAMESPACE
OSG_BASE_DLLMAPPING bool
operator ==(const FrustumVolume &lhs, const FrustumVolume &rhs)
{
return ((static_cast<const Volume &>(lhs) == rhs ) &&
(lhs.getPlanes()[0] == rhs.getPlanes()[0]) &&
(lhs.getPlanes()[1] == rhs.getPlanes()[1]) &&
(lhs.getPlanes()[2] == rhs.getPlanes()[2]) &&
(lhs.getPlanes()[3] == rhs.getPlanes()[3]) &&
(lhs.getPlanes()[4] == rhs.getPlanes()[4]) &&
(lhs.getPlanes()[5] == rhs.getPlanes()[5]));
}
void ShaderShadowMapEngine::handleDirectionalLightEnter(
DirectionalLight *dirL, RenderAction *ract, SSMEngineData *data)
{
RenderPartition *parentPart = ract ->getActivePartition();
FrustumVolume camFrust = parentPart->getFrustum ();
Matrix matEyeToWorld (parentPart->getCameraToWorld());
Matrix matWorldToLight;
Matrix matEyeToLight;
calcDirectionalLightMatrices(matWorldToLight, matEyeToLight,
dirL, matEyeToWorld );
// place light camera outside the scene bounding box:
// - project camera frustum and scene bounding box into a
// coordinate system where the directional light shines
// along the -z axis.
// - compute 2 AABBs that contain the projected frustum and
// scene BB
// - width and height of the ortho projection are determined from
// the frustum AABB, while near and far are determined by the
// scene AABB (offscreen objects cast shadows into the view volume)
Pnt3f camVerts [10];
Pnt3f sceneVerts[10];
const Matrix &matSceneToWorld = ract->topMatrix ();
BoxVolume sceneBB = ract->getActNode()->getVolume();
camFrust.getCorners(camVerts [0], camVerts [1],
camVerts [2], camVerts [3],
camVerts [4], camVerts [5],
camVerts [6], camVerts [7] );
sceneBB .getCorners(sceneVerts[0], sceneVerts[1],
sceneVerts[2], sceneVerts[3],
sceneVerts[4], sceneVerts[5],
sceneVerts[6], sceneVerts[7] );
camVerts [8].setValues(TypeTraits<Real32>::getMax(),
TypeTraits<Real32>::getMax(),
TypeTraits<Real32>::getMax() );
camVerts [9].setValues(TypeTraits<Real32>::getMin(),
TypeTraits<Real32>::getMin(),
TypeTraits<Real32>::getMin() );
sceneVerts[8].setValues(TypeTraits<Real32>::getMax(),
TypeTraits<Real32>::getMax(),
TypeTraits<Real32>::getMax() );
sceneVerts[9].setValues(TypeTraits<Real32>::getMin(),
TypeTraits<Real32>::getMin(),
TypeTraits<Real32>::getMin() );
for(UInt32 i = 0; i < 8; ++i)
{
matWorldToLight.mult(camVerts [i], camVerts [i]);
matSceneToWorld.mult(sceneVerts[i], sceneVerts[i]);
matWorldToLight.mult(sceneVerts[i], sceneVerts[i]);
camVerts [8][0] = osgMin(camVerts [8][0], camVerts [i][0]);
camVerts [9][0] = osgMax(camVerts [9][0], camVerts [i][0]);
camVerts [8][1] = osgMin(camVerts [8][1], camVerts [i][1]);
camVerts [9][1] = osgMax(camVerts [9][1], camVerts [i][1]);
sceneVerts[8][0] = osgMin(sceneVerts[8][0], sceneVerts[i][0]);
sceneVerts[9][0] = osgMax(sceneVerts[9][0], sceneVerts[i][0]);
sceneVerts[8][1] = osgMin(sceneVerts[8][1], sceneVerts[i][1]);
sceneVerts[9][1] = osgMax(sceneVerts[9][1], sceneVerts[i][1]);
sceneVerts[8][2] = osgMin(sceneVerts[8][2], sceneVerts[i][2]);
sceneVerts[9][2] = osgMax(sceneVerts[9][2], sceneVerts[i][2]);
}
// these points are the corners of the ortho shadow view volume
Pnt3f lightMin(osgMax(camVerts[8][0], sceneVerts[8][0]),
osgMax(camVerts[8][1], sceneVerts[8][1]),
-sceneVerts[9][2]);
Pnt3f lightMax(osgMin(camVerts[9][0], sceneVerts[9][0]),
osgMin(camVerts[9][1], sceneVerts[9][1]),
-sceneVerts[8][2]);
// enlarge by 2% in x, y, z direction
lightMin[0] -= (lightMax[0] - lightMin[0]) * 0.01f;
lightMin[1] -= (lightMax[1] - lightMin[1]) * 0.01f;
lightMin[2] -= (lightMax[2] - lightMin[2]) * 0.01f;
lightMax[0] += (lightMax[0] - lightMin[0]) * 0.01f;
lightMax[1] += (lightMax[1] - lightMin[1]) * 0.01f;
lightMax[2] += (lightMax[2] - lightMin[2]) * 0.01f;
Matrix matLightProj;
Matrix matLightProjTrans;
MatrixOrthogonal(matLightProj,
lightMin[0], lightMax[0],
lightMin[1], lightMax[1],
lightMin[2], lightMax[2] );
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 (_dirFPCode );
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, dirL);
ract->useNodeList(false );
// undo override
part->overrideMaterial(NULL,
ract->getActNode ( ) );
}
this->popPartition(ract);
}
// visibility levels
bool RenderPartition::pushVisibility(Node * const pNode)
{
if(getFrustumCulling() == false)
return true;
FrustumVolume::PlaneSet inplanes = _visibilityStack.back();
if(inplanes == FrustumVolume::P_ALL)
{
_visibilityStack.push_back(inplanes);
return true;
}
Color3f col;
bool result = true;
FrustumVolume frustum = _oFrustum;
BoxVolume vol = pNode->getVolume();
// don't mess with infinite volumes
if(vol.isInfinite() == false)
{
pNode->updateVolume();
vol = pNode->getVolume();
#if 1
vol.transform(topMatrix());
#else
// not quite working
Matrix m = topMatrix();
m.invert();
frustum.transform(m);
#endif
}
if(_oDrawEnv.getStatCollector() != NULL)
{
_oDrawEnv.getStatCollector()->getElem(statCullTestedNodes)->inc();
}
if(intersect(frustum, vol, inplanes) == false)
{
result = false;
col.setValuesRGB(1,0,0);
if(_oDrawEnv.getStatCollector() != NULL)
{
_oDrawEnv.getStatCollector()->getElem(statCulledNodes)->inc();
}
}
else
{
if(inplanes == FrustumVolume::P_ALL)
{
col.setValuesRGB(0,1,0);
}
else
{
col.setValuesRGB(0,0,1);
}
}
if(getVolumeDrawing())
{
dropVolume(this, pNode, col);
}
_visibilityStack.push_back(inplanes);
return result;
}
/*! \ingroup GrpSystemDrawablesGeometryFunctions
Draw the given FrustumVolume using direct OpenGL calls by intersecting
near/far with the pairwise intersection of left/right and top/bottom.
*/
OSG_SYSTEMLIB_DLLMAPPING
void OSG::drawVolume(const FrustumVolume &volume)
{
Line lines[4];
// calc the intersection lines between left/right/bottom/top
if(volume.getLeft().intersect(volume.getTop(), lines[0]) == false)
{
FWARNING(("drawVolume(Frustum): left & top parallel ?!?\n"));
return;
}
if(volume.getLeft().intersect(volume.getBottom(), lines[1]) == false)
{
FWARNING(("drawVolume(Frustum): left & bottom parallel ?!?\n"));
return;
}
if(volume.getRight().intersect(volume.getTop(), lines[2]) == false)
{
FWARNING(("drawVolume(Frustum): right & top parallel ?!?\n"));
return;
}
if(volume.getRight().intersect(volume.getBottom(), lines[3]) == false)
{
FWARNING(("drawVolume(Frustum): right & bottom parallel ?!?\n"));
return;
}
// calc the intersection points
Pnt3f pnts[8];
if(volume.getNear().intersectInfinite(lines[0], pnts[0]) == false)
{
FWARNING(("drawVolume(Frustum): near & left/top parallel ?!?\n"));
return;
}
if(volume.getFar().intersectInfinite(lines[0], pnts[1]) == false)
{
FWARNING(("drawVolume(Frustum): far & left/top parallel ?!?\n"));
return;
}
if(volume.getNear().intersectInfinite(lines[1], pnts[2]) == false)
{
FWARNING(("drawVolume(Frustum): near & left/bottom parallel ?!?\n"));
return;
}
if(volume.getFar().intersectInfinite(lines[1], pnts[3]) == false)
{
FWARNING(("drawVolume(Frustum): far & left/bottom parallel ?!?\n"));
return;
}
if(volume.getNear().intersectInfinite(lines[2], pnts[4]) == false)
{
FWARNING(("drawVolume(Frustum): near & right/top parallel ?!?\n"));
return;
}
if(volume.getFar().intersectInfinite(lines[2], pnts[5]) == false)
{
FWARNING(("drawVolume(Frustum): far & right/top parallel ?!?\n"));
return;
}
if(volume.getNear().intersectInfinite(lines[3], pnts[6]) == false)
{
FWARNING(("drawVolume(Frustum): near & right/bottom parallel ?!?\n"));
return;
}
if(volume.getFar().intersectInfinite(lines[3], pnts[7]) == false)
{
FWARNING(("drawVolume(Frustum): far & right/bottom parallel ?!?\n"));
return;
}
// got the points, draw them
glBegin(GL_LINE_LOOP);
glVertex3fv(pnts[0].getValues());
glVertex3fv(pnts[1].getValues());
glVertex3fv(pnts[3].getValues());
glVertex3fv(pnts[2].getValues());
glVertex3fv(pnts[6].getValues());
glVertex3fv(pnts[7].getValues());
glVertex3fv(pnts[5].getValues());
glVertex3fv(pnts[4].getValues());
glEnd();
glBegin(GL_LINES);
glVertex3fv(pnts[0].getValues());
glVertex3fv(pnts[2].getValues());
glVertex3fv(pnts[1].getValues());
glVertex3fv(pnts[5].getValues());
glVertex3fv(pnts[3].getValues());
glVertex3fv(pnts[7].getValues());
glVertex3fv(pnts[4].getValues());
glVertex3fv(pnts[6].getValues());
glEnd();
return;
}
/*! Calculate the vertices (\a intVerts) and center (\a intCenter) of
the intersection of \a fA and \a fB.
*/
void TrapezoidalShadowMapEngine::intersectFrusta(
const FrustumVolume &fA, const FrustumVolume &fB,
std::vector<Pnt3r> &intVerts, Pnt3r &intCenter)
{
const Plane *planes[12];
intVerts.clear ( );
intVerts.reserve(16);
for(UInt32 i = 0; i < 6; ++i)
{
planes[i ] = &(fA.getPlanes()[i]);
planes[6 + i] = &(fB.getPlanes()[i]);
}
// take all combinations of 3 planes -- but avoid choosing planes
// we know to be parallel (i.e. near and far of the same frustum), or
// that are known to intersect outside the frustum (i.e top/bottom,
// left/right).
for(UInt32 i = 0; i < 12; ++i)
{
// choose initial value of j such that it avoids near and far of fA
for(UInt32 j = osgMax<UInt32>(2, i + 1); j < 12; ++j)
{
// near/far are parallel,
// left/right always intersect outside the frustum,
// top/bottom always intersect outside the frustum
if((i == 6 && j == 7) ||
(i == 2 && j == 3) || (i == 8 && j == 9) ||
(i == 4 && j == 5) || (i == 10 && j == 11) )
continue;
Line intLine;
if(planes[i]->intersect(*planes[j], intLine) == false)
continue;
for(UInt32 k = j + 1; k < 12; ++k)
{
// near/far are parallel,
// left/right always intersect outside the frustum,
// top/bottom always intersect outside the frustum
if((j == 6 && k == 7) ||
(j == 2 && k == 3) || (j == 8 && k == 9) ||
(j == 4 && k == 5) || (j == 10 && k == 11) )
continue;
Pnt3r intPoint;
if(planes[k]->intersectInfinite(intLine, intPoint) == false)
continue;
bool intPointValid = true;
// check the intersection point against all planes to ensure
// it is in both frusta
for(UInt32 m = 0; m < 12; ++m)
{
// intPoint is the intersection of planes i, j, k, so
// we don't have to test against those
if(m == i || m == j || m == k)
continue;
if(planes[m]->isInHalfSpace(intPoint) == false)
{
intPointValid = false;
break;
}
}
if(intPointValid == true)
{
intCenter += intPoint.subZero();
intVerts.push_back(intPoint);
}
}
}
}
intCenter /= intVerts.size();
}
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 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);
}
bool Line::intersect(const FrustumVolume &frustum ,
Real &enter ,
Real &exit ) const
{
const Real inf = 2u << 16;
Pnt3r enter_point = _pos + _dir * 0.f;
Pnt3r exit_point = _pos + _dir * inf;
face faces[6];
const Plane *planes = frustum.getPlanes();
Line lines[2];
//ln[0] - intersection of right and top planes
planes[3].intersect(planes[4], lines[0]);
//ln[1] - left and bottom
planes[2].intersect(planes[5], lines[1]);
Pnt3r pointA;
Pnt3r pointB;
if(!planes[0].intersectInfinite(lines[0],pointA))
std::cout << "This should never happen (A)!!!!";
if(!planes[1].intersectInfinite(lines[1],pointB))
std::cout << "This should never happen (B)!!!!";
faces[0].point = pointA;
faces[0].inner_vector = pointB - pointA;
faces[1].point = pointB;
faces[1].inner_vector = pointA - pointB;
faces[2].point = pointB;
faces[2].inner_vector = pointA - pointB;
faces[3].point = pointA;
faces[3].inner_vector = pointB - pointA;
faces[4].point = pointA;
faces[4].inner_vector = pointB - pointA;
faces[5].point = pointB;
faces[5].inner_vector = pointA - pointB;
for(Int32 i = 0; i < 6; i++)
{
faces[i].inner_normal=planes[i].getNormal();
if(faces[i].inner_normal.dot(faces[i].inner_vector) < 0.f)
faces[i].inner_normal=-faces[i].inner_normal;
Vec3r test_enp = enter_point - faces[i].point;
Vec3r test_exp = exit_point - faces[i].point;
Real value_enp = test_enp.dot(faces[i].inner_normal);
Real value_exp = test_exp.dot(faces[i].inner_normal);
if(value_enp < 0.f && value_exp < 0.f)
return false;
if(value_enp > 0.f && value_exp < 0.f)
planes[i].intersect(*this, exit_point );
if(value_enp < 0.f && value_exp > 0.f)
planes[i].intersect(*this, enter_point);
}
Real a;
if((a = (enter_point - _pos).dot(_dir)) != 0.f)
{
enter = (enter_point - _pos).dot(enter_point - _pos) / a;
}
else
{
enter = 0.f;
}
if((a = (exit_point - _pos).dot(_dir)) != 0.f)
{
exit = (exit_point - _pos).dot(exit_point - _pos) / a;
}
else
{
enter = 0.f;
}
return true;
}
