Computer Viewing

What are the three aspects in the viewing process implemented in the pipeline?

What are the default characteristics of the WebGL camera?

In WebGL give the functions and their parameters which result in moving the camera.

What is the role of the lookat fuction? Give an example of its use for the representation of an isometric view of a cube.

What is view normalization and what is the advantage of employing it?

What is the default orthographic projection Matrix of a point? Where is the projection plane in this case? How the projection matrix is modified in practice and why?

How is the projection matrix modified in the case of simple perspective projections at the plane z=d, d<0? What is the transformation matrix to transform to Homogeneous coordinates? How can we return to the original simple perspective 3 dimensional space?

Describe the functions and their parameters that provide Orthogonal and perspective viewing.