void Init() {
PROFILE_SCOPED()
frac = 1.0 / double(edgeLen-1);
// also want vtx indices for tris not touching edge of patch
indices.reset(new unsigned short[IDX_VBO_COUNT_ALL_IDX()]);
unsigned short *idx = indices.get();
for (int x=0; x<edgeLen-1; x++) {
for (int y=0; y<edgeLen-1; y++) {
idx[0] = x + edgeLen*y;
idx[1] = x+1 + edgeLen*y;
idx[2] = x + edgeLen*(y+1);
idx+=3;
idx[0] = x+1 + edgeLen*y;
idx[1] = x+1 + edgeLen*(y+1);
idx[2] = x + edgeLen*(y+1);
idx+=3;
}
}
// these will hold the optimised indices
std::vector<unsigned short> pl_short;
// populate the N indices lists from the arrays built during InitTerrainIndices()
// iterate over each index list and optimize it
unsigned int tri_count = GetIndices(pl_short);
VertexCacheOptimizerUShort vco;
VertexCacheOptimizerUShort::Result res = vco.Optimize(&pl_short[0], tri_count);
assert(0 == res);
//create buffer & copy
indexBuffer.Reset(Pi::renderer->CreateIndexBuffer(pl_short.size(), Graphics::BUFFER_USAGE_STATIC));
Uint16* idxPtr = indexBuffer->Map(Graphics::BUFFER_MAP_WRITE);
for (Uint32 j = 0; j < pl_short.size(); j++) {
idxPtr[j] = pl_short[j];
}
indexBuffer->Unmap();
if (indices) {
indices.reset();
}
}
