does openg multiply not necessary matrixs?


I’m wondering if OpenGL multiply the current matrix (whatever mode) by each vertex, texcoord or whatever if the current matrix is an Unit (or Identity) Matrix? (for example, many times the texture matrix we are using an identity matrix and i’m not sure if this fact can affect performance)


I think this is different between implementations of OpenGL. Some does multiply, some don’t. I would be surprised if a good driver does multiply.