Using NewtonMeshCalculateVertexNormals()

[Colin]

Hi,

I am continuing my work on drawing proper meshes in modernGL, but I am a little bit stumped as to how this function works:

NEWTON_API void NewtonMeshCalculateVertexNormals(const NewtonMesh* const mesh, dFloat angleInRadians);

When I pass my mesh and the cutoff angle into this function, where do I retrieve the list of normals? The mesh argument is marked const and there is no return value. Any tips?

Thanks,
Colin

[Julio Jerez]

look at file
../newton-dynamics\packages\dScene\dSceneStdafx.cpp

void SerializeMesh (const NewtonMesh* const mesh, TiXmlElement* const rootNode);

it serializes a mean to an xml file, you can see how it read data from the mesh using

Code: Select all

   int pointCount = NewtonMeshGetPointCount (mesh);
   int pointStride = NewtonMeshGetPointStrideInByte(mesh) / sizeof (dFloat64);
   const dFloat64* const normals = NewtonMeshGetNormalArray(mesh);
   int* const normalIndexList = new int [pointCount];
   for (int i = 0; i < pointCount; i ++) {
      packVertex[i * 3 + 0] = dFloat(normals[i * pointStride + 0]);
      packVertex[i * 3 + 1] = dFloat(normals[i * pointStride + 1]);
      packVertex[i * 3 + 2] = dFloat(normals[i * pointStride + 2]);
   }
   int count = dPackVertexArray (packVertex, 3, 3 * sizeof (dFloat), pointCount, normalIndexList);


the meshe has interface to get per vertex and per faces normal. the above code is per vertex.

[Colin]

Thanks! This file is a goldmine.