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for a triangle) are calculated. Vertex has reciprocals , , and . Then, linear interpolation can be done on these reciprocals between the vertices (e.g., using barycentric coordinates), resulting in interpolated values across the surface. At a given point, this yields the interpolated and (reciprocal ). However, as our division by altered their coordinate system, this cannot be used as texture coordinates. To correct back to the space, the corrected is calculated by taking the reciprocal

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