CMSC 425 Dave Mount CMSC 425 : Lecture 5 Drawing in OpenGL : Transformations Thursday
نویسنده
چکیده
Complex Drawing in OpenGL: So far we have discussed how to draw simple 2-dimensional objects using OpenGL. Suppose that we want to draw more complex scenes. For example, we want to draw objects that move and rotate or to change the projection. We could do this by computing (ourselves) the coordinates of the transformed vertices. However, this would be inconvenient for us. It would also be inefficient. OpenGL provides methods for downloading large geometric specifications directly to the GPU. However, if the coordinates of these object were changed with each display cycle, this would negate the benefit of loading them just once.
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