Generating a heightmap from an array of meshes

Cedric · May 4, 2022, 4:46pm

It might be possible to improve things a bit.

kripken/ammo.js/blob/99d0ec0b1e26d7ccc13e013caba8e8a5c98d953b/bullet/src/BulletCollision/CollisionShapes/btTriangleMesh.cpp#L142

      
        
            
            
int btTriangleMesh::getNumTriangles() const
            {
            	if (m_use32bitIndices)
            	{
            		return m_32bitIndices.size() / 3;
            	}
            	return m_16bitIndices.size() / 3;
            }
            
            
void btTriangleMesh::preallocateVertices(int numverts)
            {
            	if (m_use4componentVertices)
            	{
            		m_4componentVertices.reserve(numverts);
            	} else
            	{
            		m_3componentVertices.reserve(numverts);
            	}
            }

pre allocate vertices/indices and use the same code for adding face. No reallocation so maybe no OOM.
Thing is, it’s not available in ammo.js/ammo.idl at main · kripken/ammo.js · GitHub
So, you have to do a local build of ammo, test it, if it’s fine, do a pr on ammo repo, push the build to babylon.js, do a pr in babylon.
It’s not that hard. I can help you.

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Generating a heightmap from an array of meshes

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