Method InitFromAssimpMesh

SampleFramework12/v1.00/Graphics/Model.cpp:128–201

}

void Mesh::InitFromAssimpMesh(const aiMesh& assimpMesh, float sceneScale, MeshVertex* dstVertices, uint16* dstIndices)
{
    numVertices = assimpMesh.mNumVertices;
    numIndices = assimpMesh.mNumFaces * 3;

    indexType = IndexType::Index16Bit;
    if(numVertices > 0xFFFF)
    {
        AssertMsg_(false, "32-bit indices not currently supported");
        // indexSize = 4;
        // indexType = IndexType::Index32Bit;
    }


    if(assimpMesh.HasPositions())
    {
        // Compute the AABB of the mesh, and copy the positions
        aabbMin = FloatMax;
        aabbMax = -FloatMax;

        for(uint64 i = 0; i < numVertices; ++i)
        {
            Float3 position = ConvertVector(assimpMesh.mVertices[i]) * sceneScale;
            aabbMin.x = Min(aabbMin.x, position.x);
            aabbMin.y = Min(aabbMin.y, position.y);
            aabbMin.z = Min(aabbMin.z, position.z);

            aabbMax.x = Max(aabbMax.x, position.x);
            aabbMax.y = Max(aabbMax.y, position.y);
            aabbMax.z = Max(aabbMax.z, position.z);

            dstVertices[i].Position = position;
        }
    }

    if(assimpMesh.HasNormals())
    {
        for(uint64 i = 0; i < numVertices; ++i)
            dstVertices[i].Normal = ConvertVector(assimpMesh.mNormals[i]);
    }

    if(assimpMesh.HasTextureCoords(0))
    {
        for(uint64 i = 0; i < numVertices; ++i)
            dstVertices[i].UV = ConvertVector(assimpMesh.mTextureCoords[0][i]).To2D();
    }

    if(assimpMesh.HasTangentsAndBitangents())
    {
        for(uint64 i = 0; i < numVertices; ++i)
        {
            dstVertices[i].Tangent = ConvertVector(assimpMesh.mTangents[i]);
            dstVertices[i].Bitangent = ConvertVector(assimpMesh.mBitangents[i]) * -1.0f;
        }
    }

    // Copy the index data
    const uint64 numTriangles = assimpMesh.mNumFaces;