CS 480/680

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# CS 480/680 - PowerPoint PPT Presentation

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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Presentation Transcript

### 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
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.
From last time…
• Q3: What is special about the Homogeneous Coordinate System?
• 4x4 matrices and 4 element vectors.
From last time…
• Q4: How do we change Frames?
• Define a 4x4 matrix to multiply things by.
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.
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
From last time…
• Q7: What is an Affine Transformation?
• It preserves lines.
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.