void OpenGLWidget::setSurfaceMeshToRender(const PolyVox::SurfaceMesh<PositionMaterialNormal>& surfaceMesh)
{
if((surfaceMesh.getNoOfIndices() == 0) || (surfaceMesh.getNoOfVertices() == 0))
{
//We don't have a valid mesh
return;
}
//Convienient access to the vertices and indices
const vector<uint32_t>& vecIndices = surfaceMesh.getIndices();
const vector<PositionMaterialNormal>& vecVertices = surfaceMesh.getVertices();
//Build an OpenGL index buffer
glGenBuffers(1, &indexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
const GLvoid* pIndices = static_cast<const GLvoid*>(&(vecIndices[0]));
glBufferData(GL_ELEMENT_ARRAY_BUFFER, vecIndices.size() * sizeof(uint32_t), pIndices, GL_STATIC_DRAW);
//Build an OpenGL vertex buffer
glGenBuffers(1, &vertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
const GLvoid* pVertices = static_cast<const GLvoid*>(&(vecVertices[0]));
glBufferData(GL_ARRAY_BUFFER, vecVertices.size() * sizeof(PositionMaterialNormal), pVertices, GL_STATIC_DRAW);
m_uBeginIndex = 0;
m_uEndIndex = vecIndices.size();
noOfIndices = surfaceMesh.getNoOfIndices();
}
void VoxelTerrain::mesh()
{
PolyVox::SurfaceMesh<PolyVox::PositionMaterialNormal> mesh;
PolyVox::Region region(PolyVox::Vector3DInt32(0,0,0),
PolyVox::Vector3DInt32(120, 60, 120));
//PolyVox::Vector3DInt32(120, 130, 120));
std::cout << "Begin extracting surface." << std::endl;
//PolyVox::MarchingCubesSurfaceExtractor<PolyVox::LargeVolume<BYTE> >
PolyVox::CubicSurfaceExtractorWithNormals<PolyVox::LargeVolume<BYTE> >
surface_extractor(mVolumeData,
region,
&mesh);
surface_extractor.execute();
std::cout << "Done extracting surface." << std::endl;
begin("Terrain", Ogre::RenderOperation::OT_TRIANGLE_LIST);
{
const std::vector<PolyVox::PositionMaterialNormal>& vecVertices =
mesh.getVertices();
const std::vector<uint32_t>& vecIndices = mesh.getIndices();
unsigned int uLodLevel = 0;
int beginIndex = mesh.m_vecLodRecords[uLodLevel].beginIndex;
int endIndex = mesh.m_vecLodRecords[uLodLevel].endIndex;
for(int index = beginIndex; index < endIndex; ++index) {
const PolyVox::PositionMaterialNormal& vertex =
vecVertices[vecIndices[index]];
const PolyVox::Vector3DFloat& v3dVertexPos = vertex.getPosition();
const PolyVox::Vector3DFloat& v3dVertexNormal = vertex.getNormal();
const PolyVox::Vector3DFloat v3dFinalVertexPos =
v3dVertexPos +
static_cast<PolyVox::Vector3DFloat>(mesh.m_Region.getLowerCorner());
position(v3dFinalVertexPos.getX(), v3dFinalVertexPos.getY(), v3dFinalVertexPos.getZ());
normal(v3dVertexNormal.getX(), v3dVertexNormal.getY(), v3dVertexNormal.getZ());
//colour(1, 0, 0, 0.5);
textureCoord(v3dFinalVertexPos.getX()/4.0f,
v3dFinalVertexPos.getY()/4.0f,
v3dFinalVertexPos.getZ()/4.0f);
}
}
end();
}
// Called when the plugin is loaded.
void create()
{
// Load Shader
Graphics::ShaderAsset* shaderAsset = Link.Graphics.getShaderAsset("PolyVox:renderShader");
if (shaderAsset)
mShader = shaderAsset->getProgram();
// Generate polyvox sphere.
createSphereInVolume(volData, 30);
PolyVox::SurfaceMesh<PolyVox::PositionMaterialNormal> surfaceMesh;
PolyVox::CubicSurfaceExtractorWithNormals< PolyVox::SimpleVolume<U8> > surfaceExtractor(&volData, volData.getEnclosingRegion(), &surfaceMesh);
surfaceExtractor.execute();
// Verts
const std::vector<PolyVox::PositionMaterialNormal>& vecVertices = surfaceMesh.getVertices();
mVerts = new PosUVNormalVertex[vecVertices.size()];
for (U32 i = 0; i < vecVertices.size(); ++i)
{
mVerts[mVertCount].m_x = vecVertices[i].position.getX();
mVerts[mVertCount].m_y = vecVertices[i].position.getY();
mVerts[mVertCount].m_z = vecVertices[i].position.getZ();
mVerts[mVertCount].m_u = 0.0f;
mVerts[mVertCount].m_v = 0.0f;
mVerts[mVertCount].m_normal_x = vecVertices[i].normal.getX();
mVerts[mVertCount].m_normal_y = vecVertices[i].normal.getY();
mVerts[mVertCount].m_normal_z = vecVertices[i].normal.getZ();
mVertCount++;
}
// Indices
const std::vector<U32>& vecIndices = surfaceMesh.getIndices();
mIndices = new U32[vecIndices.size()];
for (U32 i = 0; i < vecIndices.size(); ++i)
{
mIndices[mIndexCount] = vecIndices[mIndexCount];
mIndexCount++;
}
refresh();
}
void ofxPolyvox::polyvoxToOfMesh(const PolyVox::SurfaceMesh<PositionMaterialNormal>& surfaceMesh, ofMesh& polyvxToOfMesh, bool setColor){
//Convienient access to the vertices and indices
const vector<uint32_t>& vecIndices = surfaceMesh.getIndices();
const vector<PositionMaterialNormal>& vecVertices = surfaceMesh.getVertices();//surfaceMesh.getRawVertexData();
ofIndexType ofVecIndices;
const void* pIndices = static_cast<const void*>(&(vecIndices[0]));
int* indices = (int*)pIndices;
vector<int> indx;
for (int i = 0; i < surfaceMesh.getNoOfIndices(); i++ ){
indx.push_back(indices[i]);
//cout << "indices:" << indices[i] << endl;
polyvxToOfMesh.addIndex(indx[i]);
}
ofLog(OF_LOG_NOTICE, "ofMesh: number of indices is %d", polyvxToOfMesh.getNumIndices());
ofVec3f ofVecVertices;
for (int i = 0; i < surfaceMesh.getNoOfVertices(); i++ ){
PositionMaterialNormal vert0 = vecVertices[i];
ofVecVertices = ofVec3f(vert0.getPosition().getX(),vert0.getPosition().getY(),vert0.getPosition().getZ());
polyvxToOfMesh.addVertex(ofVecVertices);
}
ofLog(OF_LOG_NOTICE, "ofMesh: number of vertices is %d", polyvxToOfMesh.getNumVertices());
ofVec3f ofVecNormals;
for (int i = 0; i < surfaceMesh.getNoOfVertices(); i++ ){
PositionMaterialNormal vert0 = vecVertices[i];
ofVecNormals = ofVec3f(vert0.getNormal().getX(),vert0.getNormal().getY(),vert0.getNormal().getZ());
polyvxToOfMesh.addNormal(ofVecNormals);
}
ofLog(OF_LOG_NOTICE, "ofMesh: number of normals is %d", polyvxToOfMesh.getNumNormals());
if(setColor){
for (int i = 0; i < surfaceMesh.getNoOfVertices(); i++ ){
PositionMaterialNormal vert0 = vecVertices[i];
uint8_t material = static_cast<uint8_t>(vert0.getMaterial() + 0.5);
//cout << "material:" << int(material) << endl;
ofFloatColor colour = convertMaterialIDToColour(material);
//cout << colour << endl;
polyvxToOfMesh.addColor(colour);
bool col = polyvxToOfMesh.hasColors();
//cout << "hasColors:" << col << endl;
}
}
}