COMP 3490 Lecture Notes - Lecture 8: Opengl, Shear Matrix, Identity Matrix
11 Jan 2019
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Replaces the current matrix with the identity matrix. Consoles the text window at the bottom. Not in opengl but called identity matrix, with a 4 by 4 matrix, though processing is in 3d. Multiplies the current matrix by a parameter. In 2d can be given 6 values. Also a 3d version with 16 values and 4x4. If you want to draw a flowers shape you can specify the geometry piece by piece. But you want to change one component without it changing others. To do so we treat the leaf,stem as different identity then the changes will be only relative to them. We now have coordinate system for each piece of object as in the above example. By varying the parameters the flower can be drawn. Decide which way we want to orient it. Making all the transformation to leaf relative to #3 and then #1.
