bool CSTLMeshWriter::writeMeshASCII(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
{
// write STL MESH header
file->write("solid ",6);
const core::stringc name(SceneManager->getMeshCache()->getMeshName(mesh));
file->write(name.c_str(),name.size());
file->write("\n\n",2);
// write mesh buffers
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* buffer = mesh->getMeshBuffer(i);
if (buffer)
{
const u32 indexCount = buffer->getIndexCount();
for (u32 j=0; j<indexCount; j+=3)
{
writeFace(file,
buffer->getPosition(buffer->getIndices()[j]),
buffer->getPosition(buffer->getIndices()[j+1]),
buffer->getPosition(buffer->getIndices()[j+2]));
}
file->write("\n",1);
}
}
file->write("endsolid ",9);
file->write(name.c_str(),name.size());
return true;
}
void CTriangleSelector::updateFromMesh(const IMesh* mesh) const
{
if (!mesh)
return;
u32 meshBuffers = mesh->getMeshBufferCount();
u32 triangleCount = 0;
BoundingBox.reset(0.f, 0.f, 0.f);
for (u32 i = 0; i < meshBuffers; ++i)
{
IMeshBuffer* buf = mesh->getMeshBuffer(i);
u32 idxCnt = buf->getIndexCount();
const u16* indices = buf->getIndices();
for (u32 index = 0; index < idxCnt; index += 3)
{
core::triangle3df& tri = Triangles[triangleCount++];
tri.pointA = buf->getPosition(indices[index + 0]);
tri.pointB = buf->getPosition(indices[index + 1]);
tri.pointC = buf->getPosition(indices[index + 2]);
BoundingBox.addInternalPoint(tri.pointA);
BoundingBox.addInternalPoint(tri.pointB);
BoundingBox.addInternalPoint(tri.pointC);
}
}
}
bool CSTLMeshWriter::writeMeshASCII(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
{
// write STL MESH header
file->write("solid ",6);
const core::stringc name(SceneManager->getMeshCache()->getMeshFilename(mesh));
file->write(name.c_str(),name.size());
file->write("\n\n",2);
// write mesh buffers
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* buffer = mesh->getMeshBuffer(i);
if (buffer)
{
const u16 indexCount = buffer->getIndexCount();
switch(buffer->getVertexType())
{
case video::EVT_STANDARD:
{
video::S3DVertex* vtx = (video::S3DVertex*)buffer->getVertices();
for (u32 j=0; j<indexCount; j+=3)
writeFace(file,
vtx[buffer->getIndices()[j]].Pos,
vtx[buffer->getIndices()[j+1]].Pos,
vtx[buffer->getIndices()[j+2]].Pos);
}
break;
case video::EVT_2TCOORDS:
{
video::S3DVertex2TCoords* vtx = (video::S3DVertex2TCoords*)buffer->getVertices();
for (u32 j=0; j<indexCount; j+=3)
writeFace(file,
vtx[buffer->getIndices()[j]].Pos,
vtx[buffer->getIndices()[j+1]].Pos,
vtx[buffer->getIndices()[j+2]].Pos);
}
break;
case video::EVT_TANGENTS:
{
video::S3DVertexTangents* vtx = (video::S3DVertexTangents*)buffer->getVertices();
for (u32 j=0; j<indexCount; j+=3)
writeFace(file,
vtx[buffer->getIndices()[j]].Pos,
vtx[buffer->getIndices()[j+1]].Pos,
vtx[buffer->getIndices()[j+2]].Pos);
}
break;
}
file->write("\n",1);
}
}
file->write("endsolid ",9);
file->write(name.c_str(),name.size());
return true;
}
CPlanarShadow::CPlanarShadow(scene::ISceneNode*parent, scene::ISceneManager *mgr, IMesh *mesh, float divisor)
: ISceneNode(parent, mgr, -1), Vertices(0), Indices(0), SceneManager(mgr), Divisor(divisor), enableDepth(false)
{
s32 i;
s32 totalVertices = 0;
s32 totalIndices = 0;
s32 bufcnt = mesh->getMeshBufferCount();
IMeshBuffer* b;
for (i=0; i<bufcnt; ++i)
{
b = mesh->getMeshBuffer(i);
totalIndices += b->getIndexCount();
totalVertices += b->getVertexCount();
}
Vertices = new core::vector3df[totalVertices];
Indices = new u16[totalIndices];
int indStart = 0, vtxNow = 0;
for (i=0; i < bufcnt; ++i)
{
b = mesh->getMeshBuffer(i);
u16* buff = b->getIndices();
for (int o = 0; o < b->getIndexCount(); o++)
{
Indices[indStart++] = buff[o] + vtxNow;
}
vtxNow += b->getVertexCount();
}
VertexCount = totalVertices;
IndexCount = totalIndices;
buildMesh(mesh);
}
void CTriangleSelector::updateFromMesh(const IMesh* mesh) const
{
if (!mesh)
return;
u32 meshBuffers = mesh->getMeshBufferCount();
u32 triangleCount = 0;
for (u32 i = 0; i < meshBuffers; ++i)
{
IMeshBuffer* buf = mesh->getMeshBuffer(i);
u32 idxCnt = buf->getIndexCount();
const u16* indices = buf->getIndices();
switch (buf->getVertexType())
{
case video::EVT_STANDARD:
{
video::S3DVertex* vtx = (video::S3DVertex*)buf->getVertices();
for (u32 index = 0; index < idxCnt; index += 3)
{
core::triangle3df & tri = Triangles[triangleCount++];
tri.pointA = vtx[indices[index + 0]].Pos;
tri.pointB = vtx[indices[index + 1]].Pos;
tri.pointC = vtx[indices[index + 2]].Pos;
}
}
break;
case video::EVT_2TCOORDS:
{
video::S3DVertex2TCoords* vtx = (video::S3DVertex2TCoords*)buf->getVertices();
for (u32 index = 0; index < idxCnt; index += 3)
{
core::triangle3df & tri = Triangles[triangleCount++];
tri.pointA = vtx[indices[index + 0]].Pos;
tri.pointB = vtx[indices[index + 1]].Pos;
tri.pointC = vtx[indices[index + 2]].Pos;
}
}
break;
case video::EVT_TANGENTS:
{
video::S3DVertexTangents* vtx = (video::S3DVertexTangents*)buf->getVertices();
for (u32 index = 0; index < idxCnt; index += 3)
{
core::triangle3df & tri = Triangles[triangleCount++];
tri.pointA = vtx[indices[index + 0]].Pos;
tri.pointB = vtx[indices[index + 1]].Pos;
tri.pointC = vtx[indices[index + 2]].Pos;
}
}
break;
}
}
}
//-----------------------------------------------------------------------
// e x t r a c t T r i a n g l e s
//-----------------------------------------------------------------------
btTriangleMesh* TMeshShape::extractTriangles(IMesh* mesh,
bool removeDupVertices)
{
vector3df p1, p2, p3;
// 32 bit indices, 3 component vertices - allows for use in decomposition.
btTriangleMesh* triMesh = new btTriangleMesh(true, false);
u32 bufCount = mesh->getMeshBufferCount();
for(u32 i=0;i<bufCount;i++)
{
IMeshBuffer* mbuf = mesh->getMeshBuffer(i);
void* vp = mbuf->getVertices();
E_VERTEX_TYPE vtype = mbuf->getVertexType();
S3DVertex *vstd = (S3DVertex*) vp;
S3DVertex2TCoords *v2t = (S3DVertex2TCoords*) vp;
S3DVertexTangents *vtan = (S3DVertexTangents*)vp;
const u16* ip = mbuf->getIndices();
u32 ic = mbuf->getIndexCount();
u32 fi = 0;
while(fi < ic)
{
S3DVertex *v1,*v2,*v3;
switch(vtype)
{
case EVT_2TCOORDS:
v1 = &v2t[ip[fi++]];
v2 = &v2t[ip[fi++]];
v3 = &v2t[ip[fi++]];
break;
case EVT_TANGENTS:
v1 = &vtan[ip[fi++]];
v2 = &vtan[ip[fi++]];
v3 = &vtan[ip[fi++]];
break;
default:
v1 = &vstd[ip[fi++]];
v2 = &vstd[ip[fi++]];
v3 = &vstd[ip[fi++]];
break;
}
p1 = v1->Pos;
p2 = v2->Pos;
p3 = v3->Pos;
btVector3 b1(p1.X, p1.Y, p1.Z);
btVector3 b2(p2.X, p2.Y, p2.Z);
btVector3 b3(p3.X, p3.Y, p3.Z);
triMesh->addTriangle(b1,b2,b3,removeDupVertices);
}
}
return triMesh;
}
bool CSTLMeshWriter::writeMeshBinary(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
{
// write STL MESH header
file->write("binary ",7);
const core::stringc name(SceneManager->getMeshCache()->getMeshName(mesh));
const s32 sizeleft = 73-name.size(); // 80 byte header
if (sizeleft<0)
file->write(name.c_str(),73);
else
{
char* buf = new char[80];
memset(buf, 0, 80);
file->write(name.c_str(),name.size());
file->write(buf,sizeleft);
delete [] buf;
}
u32 facenum = 0;
for (u32 j=0; j<mesh->getMeshBufferCount(); ++j)
facenum += mesh->getMeshBuffer(j)->getIndexCount()/3;
file->write(&facenum,4);
// write mesh buffers
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* buffer = mesh->getMeshBuffer(i);
if (buffer)
{
const u32 indexCount = buffer->getIndexCount();
const u16 attributes = 0;
for (u32 j=0; j<indexCount; j+=3)
{
const core::vector3df& v1 = buffer->getPosition(buffer->getIndices()[j]);
const core::vector3df& v2 = buffer->getPosition(buffer->getIndices()[j+1]);
const core::vector3df& v3 = buffer->getPosition(buffer->getIndices()[j+2]);
const core::plane3df tmpplane(v1,v2,v3);
file->write(&tmpplane.Normal, 12);
file->write(&v1, 12);
file->write(&v2, 12);
file->write(&v3, 12);
file->write(&attributes, 2);
}
}
}
return true;
}
void CTriangleSelector::updateFromMesh(const IMesh* mesh) const
{
if (!mesh)
return;
bool skinnnedMesh = mesh->getMeshType() == EAMT_SKINNED;
u32 meshBuffers = mesh->getMeshBufferCount();
u32 triangleCount = 0;
BoundingBox.reset(0.f, 0.f, 0.f);
for (u32 i = 0; i < meshBuffers; ++i)
{
IMeshBuffer* buf = mesh->getMeshBuffer(i);
u32 idxCnt = buf->getIndexCount();
const u16* indices = buf->getIndices();
if ( skinnnedMesh )
{
const core::matrix4& bufferTransform = ((scene::SSkinMeshBuffer*)buf)->Transformation;
for (u32 index = 0; index < idxCnt; index += 3)
{
core::triangle3df& tri = Triangles[triangleCount++];
bufferTransform.transformVect(tri.pointA, buf->getPosition(indices[index + 0]));
bufferTransform.transformVect(tri.pointB, buf->getPosition(indices[index + 1]));
bufferTransform.transformVect(tri.pointC, buf->getPosition(indices[index + 2]));
BoundingBox.addInternalPoint(tri.pointA);
BoundingBox.addInternalPoint(tri.pointB);
BoundingBox.addInternalPoint(tri.pointC);
}
}
else
{
for (u32 index = 0; index < idxCnt; index += 3)
{
core::triangle3df& tri = Triangles[triangleCount++];
tri.pointA = buf->getPosition(indices[index + 0]);
tri.pointB = buf->getPosition(indices[index + 1]);
tri.pointC = buf->getPosition(indices[index + 2]);
BoundingBox.addInternalPoint(tri.pointA);
BoundingBox.addInternalPoint(tri.pointB);
BoundingBox.addInternalPoint(tri.pointC);
}
}
}
}
btSoftBody* MeshTools::createSoftBodyFromMesh(btSoftBodyWorldInfo& worldInfo, IMesh* mesh)
{
IMeshBuffer* buffer = mesh->getMeshBuffer(0);
vector<btScalar> vertices;
for (unsigned int i=0; i < buffer->getVertexCount(); ++i)
{
vector3df p = getBaseVertex(buffer, i).Pos;
vertices.push_back(p.X);
vertices.push_back(p.Y);
vertices.push_back(p.Z);
}
vector<int> triangles;
for (unsigned int i=0; i < buffer->getIndexCount(); ++i)
triangles.push_back(buffer->getIndices()[i]);
auto result = btSoftBodyHelpers::CreateFromTriMesh(worldInfo, &vertices[0], &triangles[0], buffer->getIndexCount()/3, false);
result->m_bUpdateRtCst = true;
return result;
}
//! creates the tree
bool COctTreeSceneNode::createTree(IMesh* mesh)
{
if (!mesh)
return false;
MeshName = SceneManager->getMeshCache()->getMeshFilename( mesh );
deleteTree();
u32 beginTime = os::Timer::getRealTime();
u32 nodeCount = 0;
u32 polyCount = 0;
Box = mesh->getBoundingBox();
if (mesh->getMeshBufferCount())
{
vertexType = mesh->getMeshBuffer(0)->getVertexType();
switch(vertexType)
{
case video::EVT_STANDARD:
{
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* b = mesh->getMeshBuffer(i);
if (b->getVertexCount() && b->getIndexCount())
{
Materials.push_back(b->getMaterial());
StdMeshes.push_back(OctTree<video::S3DVertex>::SMeshChunk());
OctTree<video::S3DVertex>::SMeshChunk &nchunk = StdMeshes.getLast();
nchunk.MaterialId = Materials.size() - 1;
u32 v;
nchunk.Vertices.reallocate(b->getVertexCount());
for (v=0; v<b->getVertexCount(); ++v)
nchunk.Vertices.push_back(((video::S3DVertex*)b->getVertices())[v]);
polyCount += b->getIndexCount();
nchunk.Indices.reallocate(b->getIndexCount());
for (v=0; v<b->getIndexCount(); ++v)
nchunk.Indices.push_back(b->getIndices()[v]);
}
}
StdOctTree = new OctTree<video::S3DVertex>(StdMeshes, MinimalPolysPerNode);
nodeCount = StdOctTree->getNodeCount();
}
break;
case video::EVT_2TCOORDS:
{
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* b = mesh->getMeshBuffer(i);
if (b->getVertexCount() && b->getIndexCount())
{
Materials.push_back(b->getMaterial());
LightMapMeshes.push_back(OctTree<video::S3DVertex2TCoords>::SMeshChunk());
OctTree<video::S3DVertex2TCoords>::SMeshChunk& nchunk = LightMapMeshes.getLast();
nchunk.MaterialId = Materials.size() - 1;
u32 v;
nchunk.Vertices.reallocate(b->getVertexCount());
for (v=0; v<b->getVertexCount(); ++v)
nchunk.Vertices.push_back(((video::S3DVertex2TCoords*)b->getVertices())[v]);
polyCount += b->getIndexCount();
nchunk.Indices.reallocate(b->getIndexCount());
for (v=0; v<b->getIndexCount(); ++v)
nchunk.Indices.push_back(b->getIndices()[v]);
}
}
LightMapOctTree = new OctTree<video::S3DVertex2TCoords>(LightMapMeshes, MinimalPolysPerNode);
nodeCount = LightMapOctTree->getNodeCount();
}
break;
case video::EVT_TANGENTS:
{
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* b = mesh->getMeshBuffer(i);
if (b->getVertexCount() && b->getIndexCount())
{
Materials.push_back(b->getMaterial());
TangentsMeshes.push_back(OctTree<video::S3DVertexTangents>::SMeshChunk());
OctTree<video::S3DVertexTangents>::SMeshChunk& nchunk = TangentsMeshes.getLast();
nchunk.MaterialId = Materials.size() - 1;
u32 v;
nchunk.Vertices.reallocate(b->getVertexCount());
for (v=0; v<b->getVertexCount(); ++v)
nchunk.Vertices.push_back(((video::S3DVertexTangents*)b->getVertices())[v]);
polyCount += b->getIndexCount();
nchunk.Indices.reallocate(b->getIndexCount());
for (v=0; v<b->getIndexCount(); ++v)
nchunk.Indices.push_back(b->getIndices()[v]);
}
}
TangentsOctTree = new OctTree<video::S3DVertexTangents>(TangentsMeshes, MinimalPolysPerNode);
nodeCount = TangentsOctTree->getNodeCount();
}
break;
}
}
u32 endTime = os::Timer::getRealTime();
c8 tmp[255];
sprintf(tmp, "Needed %ums to create OctTree SceneNode.(%u nodes, %u polys)",
endTime - beginTime, nodeCount, polyCount/3);
os::Printer::log(tmp, ELL_INFORMATION);
return true;
}
bool CSTLMeshWriter::writeMeshBinary(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
{
// write STL MESH header
file->write("binary ",7);
const core::stringc name(SceneManager->getMeshCache()->getMeshFilename(mesh));
const s32 sizeleft = 73-name.size(); // 80 byte header
if (sizeleft<0)
file->write(name.c_str(),73);
else
{
char* buf = new char[80];
memset(buf, 0, 80);
file->write(name.c_str(),name.size());
file->write(buf,sizeleft);
delete [] buf;
}
u32 facenum = 0;
for (u32 j=0; j<mesh->getMeshBufferCount(); ++j)
facenum += mesh->getMeshBuffer(j)->getIndexCount()/3;
file->write(&facenum,4);
// write mesh buffers
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* buffer = mesh->getMeshBuffer(i);
if (buffer)
{
const u16 indexCount = buffer->getIndexCount();
switch(buffer->getVertexType())
{
case video::EVT_STANDARD:
{
video::S3DVertex* vtx = (video::S3DVertex*)buffer->getVertices();
const u16 attributes = 0;
for (u32 j=0; j<indexCount; j+=3)
{
file->write(&core::plane3df(vtx[buffer->getIndices()[j]].Pos,vtx[buffer->getIndices()[j+1]].Pos,vtx[buffer->getIndices()[j+2]].Pos).Normal, 12);
file->write(&vtx[buffer->getIndices()[j]].Pos, 12);
file->write(&vtx[buffer->getIndices()[j+1]].Pos, 12);
file->write(&vtx[buffer->getIndices()[j+2]].Pos, 12);
file->write(&attributes, 2);
}
}
break;
case video::EVT_2TCOORDS:
{
video::S3DVertex2TCoords* vtx = (video::S3DVertex2TCoords*)buffer->getVertices();
const u16 attributes = 0;
for (u32 j=0; j<indexCount; j+=3)
{
file->write(&core::plane3df(vtx[buffer->getIndices()[j]].Pos,vtx[buffer->getIndices()[j+1]].Pos,vtx[buffer->getIndices()[j+2]].Pos).Normal, 12);
file->write(&vtx[buffer->getIndices()[j]].Pos, 12);
file->write(&vtx[buffer->getIndices()[j+1]].Pos, 12);
file->write(&vtx[buffer->getIndices()[j+2]].Pos, 12);
file->write(&attributes, 2);
}
}
break;
case video::EVT_TANGENTS:
{
video::S3DVertexTangents* vtx = (video::S3DVertexTangents*)buffer->getVertices();
const u16 attributes = 0;
for (u32 j=0; j<indexCount; j+=3)
{
file->write(&core::plane3df(vtx[buffer->getIndices()[j]].Pos,vtx[buffer->getIndices()[j+1]].Pos,vtx[buffer->getIndices()[j+2]].Pos).Normal, 12);
file->write(&vtx[buffer->getIndices()[j]].Pos, 12);
file->write(&vtx[buffer->getIndices()[j+1]].Pos, 12);
file->write(&vtx[buffer->getIndices()[j+2]].Pos, 12);
file->write(&attributes, 2);
}
}
break;
}
}
}
return true;
}
//! writes a mesh
bool COBJMeshWriter::writeMesh(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
{
if (!file)
return false;
os::Printer::log("Writing mesh", file->getFileName());
// write OBJ MESH header
const core::stringc name(FileSystem->getFileBasename(SceneManager->getMeshCache()->getMeshName(mesh), false)+".mtl");
file->write("# exported by Irrlicht\n",23);
file->write("mtllib ",7);
file->write(name.c_str(),name.size());
file->write("\n\n",2);
// write mesh buffers
core::array<video::SMaterial*> mat;
u32 allVertexCount=1; // count vertices over the whole file
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
core::stringc num(i+1);
IMeshBuffer* buffer = mesh->getMeshBuffer(i);
if (buffer && buffer->getVertexCount())
{
file->write("g grp", 5);
file->write(num.c_str(), num.size());
file->write("\n",1);
u32 j;
const u32 vertexCount = buffer->getVertexCount();
for (j=0; j<vertexCount; ++j)
{
file->write("v ",2);
getVectorAsStringLine(buffer->getPosition(j), num);
file->write(num.c_str(), num.size());
}
for (j=0; j<vertexCount; ++j)
{
file->write("vt ",3);
getVectorAsStringLine(buffer->getTCoords(j), num);
file->write(num.c_str(), num.size());
}
for (j=0; j<vertexCount; ++j)
{
file->write("vn ",3);
getVectorAsStringLine(buffer->getNormal(j), num);
file->write(num.c_str(), num.size());
}
file->write("usemtl mat",10);
num = "";
for (j=0; j<mat.size(); ++j)
{
if (*mat[j]==buffer->getMaterial())
{
num = core::stringc(j);
break;
}
}
if (num == "")
{
num = core::stringc(mat.size());
mat.push_back(&buffer->getMaterial());
}
file->write(num.c_str(), num.size());
file->write("\n",1);
const u32 indexCount = buffer->getIndexCount();
for (j=0; j<indexCount; j+=3)
{
file->write("f ",2);
num = core::stringc(buffer->getIndices()[j+2]+allVertexCount);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write(" ",1);
num = core::stringc(buffer->getIndices()[j+1]+allVertexCount);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write(" ",1);
num = core::stringc(buffer->getIndices()[j+0]+allVertexCount);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write(" ",1);
file->write("\n",1);
}
file->write("\n",1);
allVertexCount += vertexCount;
}
}
if (mat.size() == 0)
return true;
file = FileSystem->createAndWriteFile( name );
if (file)
{
os::Printer::log("Writing material", file->getFileName());
file->write("# exported by Irrlicht\n\n",24);
for (u32 i=0; i<mat.size(); ++i)
{
core::stringc num(i);
file->write("newmtl mat",10);
file->write(num.c_str(),num.size());
file->write("\n",1);
getColorAsStringLine(mat[i]->AmbientColor, "Ka", num);
file->write(num.c_str(),num.size());
getColorAsStringLine(mat[i]->DiffuseColor, "Kd", num);
file->write(num.c_str(),num.size());
getColorAsStringLine(mat[i]->SpecularColor, "Ks", num);
file->write(num.c_str(),num.size());
getColorAsStringLine(mat[i]->EmissiveColor, "Ke", num);
file->write(num.c_str(),num.size());
num = core::stringc(mat[i]->Shininess/0.128f);
file->write("Ns ", 3);
file->write(num.c_str(),num.size());
file->write("\n", 1);
if (mat[i]->getTexture(0))
{
file->write("map_Kd ", 7);
file->write(mat[i]->getTexture(0)->getName().getPath().c_str(), mat[i]->getTexture(0)->getName().getPath().size());
file->write("\n",1);
}
file->write("\n",1);
}
file->drop();
}
return true;
}
// ISoftBody::createShape() is taken from code found on the Irrlicht forum
void ISoftBody::createShape(IMesh* const collMesh)
{
int cMeshBuffer, j;
IMeshBuffer *mb;
video::S3DVertex* mb_vertices;
u16* mb_indices;
std::map<int, int> index_map;
std::map<int, int> bullet_map;
std::map<int, S3DVertex> vertex_map;
int count = 0;
indexCount = 0;
vertexCount = 0;
for(cMeshBuffer=0; cMeshBuffer < 1; cMeshBuffer++)
{
//printf("Loading new mesh buffer for softbody.\n");
mb = collMesh->getMeshBuffer(cMeshBuffer);
mb_vertices = (irr::video::S3DVertex*)mb->getVertices();
mb_indices = mb->getIndices();
indexCount += mb->getIndexCount();
vertexCount += mb->getVertexCount();
for(u32 i=0; i<mb->getIndexCount(); i++)
{
int iIndex = mb_indices[i];
vector3df iVertex = mb_vertices[iIndex].Pos;
bool isFirst = true;
for(u32 j=0; j<i; j++)
{
int jIndex = mb_indices[j];
vector3df jVertex = mb_vertices[jIndex].Pos;
if (iVertex == jVertex)
{
index_map.insert(std::make_pair(i, j));
isFirst = false;
break;
}
}
// ???????Bullet??Index??????
if(isFirst)
{
// Irrlicht?Index??????Index
index_map.insert(std::make_pair(i, i));
// ?????Index????Index
bullet_map.insert(std::make_pair(i, count));
// ??Index?????????
vertex_map.insert(std::make_pair(count, mb_vertices[iIndex]));
count++;
}
}
}
indices = new int[indexCount];
vertexCount = vertex_map.size();
vertices = new btScalar[vertexCount*3];
for(j=0; j<indexCount; j++)
{
int index1 = index_map.find(j)->second;
int index2 = bullet_map.find(index1)->second;
indices[j] = index2;
}
for(j=0; j<vertexCount; j++)
{
vertices[3*j] = vertex_map[j].Pos.X;
vertices[3*j+1] = vertex_map[j].Pos.Y;
vertices[3*j+2] = -vertex_map[j].Pos.Z;
}
//std::cout << "create softbody" << std::endl;
object = btSoftBodyHelpers::CreateFromTriMesh(
dynamicsWorld->getSoftBodyWorldInfo(), vertices,indices, indexCount/3);
//std::cout << "create map" << std::endl;
for(int i=0; i<getPointer()->m_faces.size(); i++)
{
btSoftBody::Face face = getPointer()->m_faces[i];
for(int j=0; j<3; j++)
{
if(node_map.find(face.m_n[j]) == node_map.end())
{
node_map.insert(std::make_pair(face.m_n[j], node_map.size()));
}
}
for(int j=0; j<3; j++)
{
m_indices.push_back(node_map.find(face.m_n[j])->second);
}
}
// Reverse node->index to index->node (should be unique on both sides)
std::map<btSoftBody::Node*, int>::const_iterator node_iter;
for(node_iter = node_map.begin(); node_iter != node_map.end(); ++node_iter)
{
m_vertices.insert(std::make_pair(node_iter->second, node_iter->first));
}
//std::cout << "update Irrlicht vertices" << std::endl;
std::map<int, btSoftBody::Node*>::const_iterator it;
for(u32 i=0; i<mb->getVertexCount(); i++)
{
for(it=m_vertices.begin(); it != m_vertices.end(); ++it)
{
int v_index = it->first;
btSoftBody::Node* node = it->second;
if(node->m_x.x() == mb_vertices[i].Pos.X &&
node->m_x.y() == mb_vertices[i].Pos.Y &&
node->m_x.z() == mb_vertices[i].Pos.Z)
{
MeshMap.insert(std::make_pair(i, v_index));
break;
}
}
}
}
MeshTools::SplitMeshResult MeshTools::splitMeshZ(IMesh* oldMesh, float zCut, float zInsert, bool marginalTrisInLeft, bool marginalTrisInRight)
{
IMeshBuffer* oldMeshBuf = oldMesh->getMeshBuffer(0);
u16* oldInd = oldMeshBuf->getIndices();
SMeshBuffer* leftMeshBuf = new SMeshBuffer();
SMeshBuffer* rightMeshBuf = new SMeshBuffer();
LinkSplitter linkSplitter(oldMeshBuf, zCut);
vector3df const offset(0,0, zInsert);
set<pair<PsblVertPtr, PsblVertPtr>> leftEdgeLinks;
set<pair<PsblVertPtr, PsblVertPtr>> rightEdgeLinks;
for (u32 i=0; i < oldMeshBuf->getIndexCount(); i += 3)
{
// Calling these shapes instead of triangles because they could be triangle or a quad after slice,
// (it could also be a degenerate case of a line or a point - those will be discarded by addConvexShape)
vector<PsblVertPtr> leftShape;
vector<PsblVertPtr> rightShape;
int a = oldInd[i];
int b = oldInd[i+1];
int c = oldInd[i+2];
PsblVertPtr mid1;
PsblVertPtr mid2;
PsblVertPtr mid3;
// Don't create a copy just for a triangle that is just kissing the edge. Leave it in the background.
if (linkSplitter.compareZ(a)==0 && linkSplitter.compareZ(b)==0 && linkSplitter.compareZ(c)==0)
{
if (marginalTrisInLeft)
{
leftShape.push_back(linkSplitter.getVert(a));
leftShape.push_back(linkSplitter.getVert(b));
leftShape.push_back(linkSplitter.getVert(c));
}
if (marginalTrisInRight)
{
rightShape.push_back(linkSplitter.getVert(a));
rightShape.push_back(linkSplitter.getVert(b));
rightShape.push_back(linkSplitter.getVert(c));
}
}
else
{
// This is something I had to think hard about so I'm writing this comment so I don't
// have to think it through again or forget it:
//
// Both the left shape and the right shape, and both the triangle and the quad, "magically"
// come out with correct winding order when the triangle is split. Here's why:
// Let the original triangle vertices be A-B-C.
// Let the split midpoints be AB' and CA' as A-B is split and C-A are split respectively.
// The shapes (ignore which shape is left or right, call them P and Q instead)
// will be filled in the following order:
//
// round P Q Comment
// 1 A - A is not in Q at all
// 1 cont. AB' AB' AB' replaces B in P
// 2 - B B proper is in Q and not in P
// 2 cont. - - Link B-C is not split
// 3 - C C proper is in Q and not in P
// 3 cont. CA' CA' CA' replaces C in P
//
// Now, read the columns P and Q vertically top to bottom to see the resultant vertex order.
// The triangle P is trivially still the correct winding order; it is just a smaller triangle now.
// The new quad Q retains the old triangle's winding order property for the following reason:
// As you wrapped around a full circle in old triangle A-B-C you would have traversed C-A then A-B.
// The link C-A has been cut and vertex CA' inserted.
// The link A-B has been cut and vertex AB' inserted.
// If you traverse the new shape starting from the _middle_ you follow the following path:
// B-C C-CA' CA'-AB' AB'-B B-C (again)
// Compare to old triangle:
// B-C C-A A-B B-C (again)
// Even though vertex A has been cut off and replaced with two vertices, the two
// new vertices lie along the path that the old links took and are in the new shape in the right order.
mid1 = linkSplitter.processLink(leftShape, rightShape, a, b);
mid2 = linkSplitter.processLink(leftShape, rightShape, b, c);
mid3 = linkSplitter.processLink(leftShape, rightShape, c, a);
}
// If a triangle was split then two of those three midpoints are inhabited by a vertex.
// We want to get them both in mid1 and mid2 AND we need them in correct order.
PsblVertPtr cut1 = (mid1 && mid2)? mid1 : mid2;
PsblVertPtr cut2 = (mid2 && mid3)? mid3 : mid2;
if (cut1 && cut2)
{
vector<PsblVertPtr> chain = linkSplitter.chopLink(cut1, cut2, 1);
linkSplitter.insertPoints(leftShape, cut1, cut2, chain);
linkSplitter.insertPoints(rightShape, cut1, cut2, chain);
}
linkSplitter.addConvexShape(leftShape, leftMeshBuf, -offset/2);
linkSplitter.addConvexShape(rightShape, rightMeshBuf, offset/2);
// Add any edges of the left shape that lie along the border.
linkSplitter.addEdgeLinks(leftShape, leftEdgeLinks);
// Right side polys that share a border with left side ones will have
// opposite winding order. In order for set_intersection to consider them
// as matches, we'll store the right side links in reversed order.
std::reverse(rightShape.begin(), rightShape.end());
linkSplitter.addEdgeLinks(rightShape, rightEdgeLinks);
}
SMesh* leftMesh = new SMesh();
leftMeshBuf->recalculateBoundingBox();
leftMeshBuf->setHardwareMappingHint(EHM_STATIC);
leftMesh->addMeshBuffer(leftMeshBuf);
leftMesh->recalculateBoundingBox();
leftMeshBuf->drop(); // we drop the buf, mesh obj has it now
SMesh* rightMesh = new SMesh();
rightMeshBuf->recalculateBoundingBox();
rightMeshBuf->setHardwareMappingHint(EHM_STATIC);
rightMesh->addMeshBuffer(rightMeshBuf);
rightMesh->recalculateBoundingBox();
rightMeshBuf->drop(); // we drop the buf, mesh obj has it now
SMesh* middleMesh = NULL;
if (zInsert > 0)
{
set<pair<PsblVertPtr,PsblVertPtr>> result;
std::set_intersection(
leftEdgeLinks.begin(), leftEdgeLinks.end(),
rightEdgeLinks.begin(), rightEdgeLinks.end(),
std::inserter(result, result.begin())
);
size_t debugsize = result.size();
if (result.size() > 0)
{
SMeshBuffer* middleMeshBuf = new SMeshBuffer();
vector<PsblVertPtr> shape(4);
for (auto it=result.begin(); it!=result.end(); ++it)
{
shape[0] = it->second;
shape[1] = it->first;
shape[2] = it->first->duplicate(offset);
shape[3] = it->second->duplicate(offset);
linkSplitter.addConvexShape(shape, middleMeshBuf, -offset/2);
}
middleMesh = new SMesh();
middleMeshBuf->recalculateBoundingBox();
middleMeshBuf->setHardwareMappingHint(EHM_STATIC);
middleMesh->addMeshBuffer(middleMeshBuf);
middleMesh->recalculateBoundingBox();
middleMeshBuf->drop(); // we drop the buf, mesh obj has it now
}
}
return SplitMeshResult {leftMesh, middleMesh, rightMesh};
}
//! draws the element and its children
void CGUIMeshViewer::draw()
{
if (!IsVisible)
return;
IGUISkin* skin = Environment->getSkin();
IVideoDriver* driver = Environment->getVideoDriver();
rect<SINT32> viewPort = AbsoluteRect;
viewPort.LowerRightCorner.x -= 1;
viewPort.LowerRightCorner.y -= 1;
viewPort.UpperLeftCorner.x += 1;
viewPort.UpperLeftCorner.y += 1;
viewPort.clipAgainst(AbsoluteClippingRect);
// draw the frame
rect<SINT32> frameRect(AbsoluteRect);
frameRect.LowerRightCorner.y = frameRect.UpperLeftCorner.y + 1;
skin->draw2DRectangle(this, skin->getColor(EGDC_3D_SHADOW), frameRect, &AbsoluteClippingRect);
frameRect.LowerRightCorner.y = AbsoluteRect.LowerRightCorner.y;
frameRect.LowerRightCorner.x = frameRect.UpperLeftCorner.x + 1;
skin->draw2DRectangle(this, skin->getColor(EGDC_3D_SHADOW), frameRect, &AbsoluteClippingRect);
frameRect = AbsoluteRect;
frameRect.UpperLeftCorner.x = frameRect.LowerRightCorner.x - 1;
skin->draw2DRectangle(this, skin->getColor(EGDC_3D_HIGH_LIGHT), frameRect, &AbsoluteClippingRect);
frameRect = AbsoluteRect;
frameRect.UpperLeftCorner.y = AbsoluteRect.LowerRightCorner.y - 1;
skin->draw2DRectangle(this, skin->getColor(EGDC_3D_HIGH_LIGHT), frameRect, &AbsoluteClippingRect);
// draw the mesh
if (Mesh)
{
//TODO: if outside of screen, dont draw.
// - why is the absolute clipping rect not already the screen?
rect<SINT32> oldViewPort = driver->getViewPort();
driver->setViewPort(viewPort);
Matrix4 mat;
//CameraControl->calculateProjectionMatrix(mat);
//driver->setTransform(TS_PROJECTION, mat);
mat = Matrix4::IDENTITY;
mat.setTrans(Vector3(0, 0, 0));
//mat.setTranslation(Vector3(0, 0, 0));
driver->setTransform(ETS_WORLD, mat);
//CameraControl->calculateViewMatrix(mat);
//driver->setTransform(TS_VIEW, mat);
driver->setMaterial(Material);
UINT32 frame = 0;
if (Mesh->getFrameCount())
frame = (Timer::getTime() / 20) % Mesh->getFrameCount();
const IMesh* const m = Mesh->getMesh(frame);
for (UINT32 i = 0; i<m->getMeshBufferCount(); ++i)
{
IMeshBuffer* mb = m->getMeshBuffer(i);
driver->drawVertexPrimitiveList(mb->getVertices(),
mb->getVertexCount(), mb->getIndices(),
mb->getIndexCount() / 3, mb->getVertexType(),
EPT_TRIANGLES, mb->getIndexType());
}
driver->setViewPort(oldViewPort);
}
IGUIElement::draw();
}
//! sets the mesh from which the shadow volume should be generated.
void CShadowVolumeSceneNode::setMeshToRenderFrom(IMesh* mesh)
{
ShadowVolumesUsed = 0;
s32 oldIndexCount = IndexCount;
s32 oldVertexCount = VertexCount;
VertexCount = 0;
IndexCount = 0;
if (!mesh)
return;
// calculate total amount of vertices and indices
u32 i;
s32 totalVertices = 0;
s32 totalIndices = 0;
u32 bufcnt = mesh->getMeshBufferCount();
IMeshBuffer* b;
for (i=0; i<bufcnt; ++i)
{
b = mesh->getMeshBuffer(i);
totalIndices += b->getIndexCount();
totalVertices += b->getVertexCount();
}
// allocate memory if nececcary
if (totalVertices > VertexCountAllocated)
{
delete [] Vertices;
Vertices = new core::vector3df[totalVertices];
VertexCountAllocated = totalVertices;
}
if (totalIndices > IndexCountAllocated)
{
delete [] Indices;
Indices = new u16[totalIndices];
IndexCountAllocated = totalIndices;
if (UseZFailMethod)
{
delete [] FaceData;
FaceData = new bool[totalIndices / 3];
}
}
// copy mesh
for (i=0; i<bufcnt; ++i)
{
b = mesh->getMeshBuffer(i);
s32 idxcnt = b->getIndexCount();
s32 vtxnow = VertexCount;
const u16* idxp = b->getIndices();
const u16* idxpend = idxp + idxcnt;
for (; idxp!=idxpend; ++idxp)
Indices[IndexCount++] = *idxp + vtxnow;
s32 vtxcnt = b->getVertexCount();
switch(b->getVertexType())
{
case video::EVT_STANDARD:
{
const video::S3DVertex* vp = (video::S3DVertex*)b->getVertices();
const video::S3DVertex* vpend = vp + vtxcnt;
for (; vp!=vpend; ++vp)
Vertices[VertexCount++] = (*vp).Pos;
}
break;
case video::EVT_2TCOORDS:
{
const video::S3DVertex2TCoords* vp = (video::S3DVertex2TCoords*)b->getVertices();
const video::S3DVertex2TCoords* vpend = vp + vtxcnt;
for (; vp!=vpend; ++vp)
Vertices[VertexCount++] = (*vp).Pos;
}
break;
case video::EVT_TANGENTS:
{
const video::S3DVertexTangents* vp = (video::S3DVertexTangents*)b->getVertices();
const video::S3DVertexTangents* vpend = vp + vtxcnt;
for (; vp!=vpend; ++vp)
Vertices[VertexCount++] = (*vp).Pos;
}
break;
}
}
// recalculate adjacency if neccessarry
if (oldVertexCount != VertexCount &&
oldIndexCount != IndexCount && UseZFailMethod)
calculateAdjacency();
// create as much shadow volumes as there are lights but
// do not ignore the max light settings.
u32 lights = SceneManager->getVideoDriver()->getDynamicLightCount();
core::matrix4 mat = Parent->getAbsoluteTransformation();
core::vector3df parentpos = Parent->getAbsolutePosition();
core::vector3df lpos;
mat.makeInverse();
for (i=0; i<lights; ++i)
{
const video::SLight& dl = SceneManager->getVideoDriver()->getDynamicLight(i);
lpos = dl.Position;
if (dl.CastShadows &&
fabs((lpos - parentpos).getLengthSQ()) <= (dl.Radius*dl.Radius*4.0f))
{
mat.transformVect(lpos);
createShadowVolume(lpos);
}
}
}