void RenderableObject::Init() {
//setup vao and vbo stuff
glGenVertexArrays(1, &vaoID);
glGenBuffers(1, &vboVerticesID);
glGenBuffers(1, &vboIndicesID);
//get total vertices and indices
totalVertices = GetTotalVertices();
totalIndices = GetTotalIndices();
primType = GetPrimitiveType();
//now allocate buffers
glBindVertexArray(vaoID);
glBindBuffer (GL_ARRAY_BUFFER, vboVerticesID);
glBufferData (GL_ARRAY_BUFFER, totalVertices * sizeof(glm::vec3), 0, GL_STATIC_DRAW);
GLfloat* pBuffer = static_cast<GLfloat*>(glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY));
FillVertexBuffer(pBuffer);
glUnmapBuffer(GL_ARRAY_BUFFER);
glEnableVertexAttribArray(shader["vVertex"]);
glVertexAttribPointer(shader["vVertex"], 3, GL_FLOAT, GL_FALSE,0,0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboIndicesID);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, totalIndices * sizeof(GLuint), 0, GL_STATIC_DRAW);
GLuint* pIBuffer = static_cast<GLuint*>(glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_WRITE_ONLY));
FillIndexBuffer(pIBuffer);
glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
glBindVertexArray(0);
}
int Load3ds::ProcessNextObjectChunk(Chunk * aPreviousChunk)
{
mCurrentChunk = new Chunk;
size_t numberOfBytesRead;
while (aPreviousChunk->mBytesRead < aPreviousChunk->mLength)
{
ReadChunk(mCurrentChunk);
switch (mCurrentChunk->mID)
{
case OBJTRIMESH:
// at this point, mBuffer will contain the name of the object being described
ProcessNextObjectChunk(mCurrentChunk);
ComputeNormals();
break;
case TRIVERT:
FillVertexBuffer(mCurrentChunk);
break;
case TRIFACE:
FillIndexBuffer(mCurrentChunk);
break;
case TRIFACEMAT:
// your getting a list of triangles that belong to a certain material
SortIndicesByMaterial(mCurrentChunk);
break;
case TRIUV:
FillTexCoordBuffer(mCurrentChunk);
break;
default: // unrecognized/unsupported chunk
mCurrentChunk->mBytesRead += numberOfBytesRead = fread(mBuffer, 1, mCurrentChunk->mLength - mCurrentChunk->mBytesRead, mFile);
#ifdef __BIG_ENDIAN__
for (int i = 0; i < numberOfBytesRead; i++)
{
static_cast<short *>(mBuffer)[i] = OSReadSwapInt16(&static_cast<short*>(mBuffer)[i],0);
}
#endif
break;
}
aPreviousChunk->mBytesRead += mCurrentChunk->mBytesRead;
}
delete mCurrentChunk;
mCurrentChunk = aPreviousChunk;
return 1;
}
bool ZTerrain::Cull( Frustum* pFrustum ,float loose )
{
if (!m_bShow)
return false;
cCollision::STATE retCS=cCollision::CheckWorldFrustum(*pFrustum,m_BoundingSphere,0.0f);
if( retCS == cCollision::OUTSIDE)
return false;
FillIndexBuffer(*pFrustum);
return true;
}
