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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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Cs 480 680

CS 480/680

Computer Graphics

Review

Dr. Frederick C Harris, Jr.


From last time

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 time1

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 time2

From last time…

  • Q3: What is special about the Homogeneous Coordinate System?

    • 4x4 matrices and 4 element vectors.


From last time3

From last time…

  • Q4: How do we change Frames?

    • Define a 4x4 matrix to multiply things by.


From last time4

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 time5

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 time6

From last time…

  • Q7: What is an Affine Transformation?

    • It preserves lines.


From last time7

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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