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List the three steps of the View Transformation (Camera View) step of the Geometry stage
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give an equation that describes the homogeneous transofrmaiton involved in view transformation
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which direction is the camera view usually facing?
- -z direction
- x axis facing right
- y axis faceing upwards
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what does view projection mean? list the 2 types of projection
- "we want to create a picture of the scene viewed from the camera"
- parallel (/orthographic) projection
- prespective projection
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what is the projection matrix for parallel?
- (direction rather than viewed from a point)
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What is the difference between a parallel and perspective projection and what is the major consequence?
- parallel is directional projection, qhile perspective projection is specified by a centre/point of projection and the focal distance.
- for prespective, objects far away appear smaller, closer ones appear bigger.
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What is the homogenous transformation matric for perspective prjection?
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Problem with standard perspective projection and alternative formulation?
- problem: centre of projection fixed at origin
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