void CShadowVolumeSceneNode::createShadowVolume(const core::vector3df& light)
{
SShadowVolume* svp = 0;
// builds the shadow volume and adds it to the shadow volume list.
if (ShadowVolumes.size() > ShadowVolumesUsed)
{
// get the next unused buffer
svp = &ShadowVolumes[ShadowVolumesUsed];
svp->set_used(0);
}
else
{
ShadowVolumes.push_back(SShadowVolume());
svp = &ShadowVolumes.getLast();
}
svp->reallocate(IndexCount*5);
++ShadowVolumesUsed;
const u32 faceCount = IndexCount / 3;
if (faceCount * 6 > Edges.size())
Edges.set_used(faceCount*6);
u32 numEdges = 0;
const core::vector3df ls = light * Infinity; // light scaled
//if (UseZFailMethod)
// createZFailVolume(faceCount, numEdges, light, svp);
//else
// createZPassVolume(faceCount, numEdges, light, svp, false);
// the createZFailVolume does currently not work 100% correctly,
// so we create createZPassVolume with caps if the zfail method
// is used
createZPassVolume(faceCount, numEdges, light, svp, UseZFailMethod);
for (u32 i=0; i<numEdges; ++i)
{
core::vector3df &v1 = Vertices[Edges[2*i+0]];
core::vector3df &v2 = Vertices[Edges[2*i+1]];
core::vector3df v3(v1 - ls);
core::vector3df v4(v2 - ls);
// Add a quad (two triangles) to the vertex list
if (svp->size() < svp->allocated_size()-5)
{
svp->push_back(v1);
svp->push_back(v2);
svp->push_back(v3);
svp->push_back(v2);
svp->push_back(v4);
svp->push_back(v3);
}
}
}
void CShadowVolumeSceneNode::createShadowVolume(const core::vector3df& light, bool isDirectional)
{
SShadowVolume* svp = 0;
core::aabbox3d<f32>* bb = 0;
// builds the shadow volume and adds it to the shadow volume list.
if (ShadowVolumes.size() > ShadowVolumesUsed)
{
// get the next unused buffer
svp = &ShadowVolumes[ShadowVolumesUsed];
svp->set_used(0);
bb = &ShadowBBox[ShadowVolumesUsed];
}
else
{
ShadowVolumes.push_back(SShadowVolume());
svp = &ShadowVolumes.getLast();
ShadowBBox.push_back(core::aabbox3d<f32>());
bb = &ShadowBBox.getLast();
}
svp->reallocate(IndexCount*5);
++ShadowVolumesUsed;
// We use triangle lists
Edges.set_used(IndexCount*2);
u32 numEdges = 0;
numEdges=createEdgesAndCaps(light, svp, bb);
// for all edges add the near->far quads
for (u32 i=0; i<numEdges; ++i)
{
const core::vector3df &v1 = Vertices[Edges[2*i+0]];
const core::vector3df &v2 = Vertices[Edges[2*i+1]];
const core::vector3df v3(v1+(v1 - light).normalize()*Infinity);
const core::vector3df v4(v2+(v2 - light).normalize()*Infinity);
// Add a quad (two triangles) to the vertex list
#ifdef _DEBUG
if (svp->size() >= svp->allocated_size()-5)
os::Printer::log("Allocation too small.", ELL_DEBUG);
#endif
svp->push_back(v1);
svp->push_back(v2);
svp->push_back(v3);
svp->push_back(v2);
svp->push_back(v4);
svp->push_back(v3);
}
}
