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CS 480/680

CS 480/680. Computer Graphics Review. Dr. Frederick C Harris, Jr. From last time…. Q1: What is a Coordinate System, what is a Frame, and what is the difference? Coordinate System: Basis Vectors Frame: Adds the Origin. From last time….

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CS 480/680

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  1. CS 480/680 Computer Graphics Review Dr. Frederick C Harris, Jr.

  2. From last time… • Q1: What is a Coordinate System, what is a Frame, and what is the difference? • Coordinate System: Basis Vectors • Frame: Adds the Origin.

  3. From last time… • Q2: In order to not confuse points and vectors we introduced a new system. What is this system called? • Homogeneous Coordinate System.

  4. From last time… • Q3: What is special about the Homogeneous Coordinate System? • 4x4 matrices and 4 element vectors.

  5. From last time… • Q4: How do we change Frames? • Define a 4x4 matrix to multiply things by.

  6. From last time… • Q5: We discussed several of these matrices … some that we hook together commonly. (MVP) What does MVP stand for in computer graphics? • Model View Projection matrix.

  7. From last time… • Q6: What are the spaces/frames that the MVP matrix moves us through? • Model to World • World to Eye • Eye to Clip

  8. From last time… • Q7: What is an Affine Transformation? • It preserves lines.

  9. From last time… • Q8: How many degrees of freedom do you have in an Affine Transformation? (how many elements in the matrix can you change and what does the matrix look like)? • 12.

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