MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -The defaults in OpenGL are: the eye at (0, 0, -1); the center at (0, 0, 0) and the up is given by the positive direction of the Oy axis (0, 1, 0). Suppose that we have a generic C++ function that given the eye, the center and the up will return a 4x4 view matrix for us.

Detailed explanation-2: -OpenGL has 4 different types of matrices; GL MODELVIEW, GL PROJECTION, GL TEXTURE, and GL COLOR. You can switch the current type by using glMatrixMode() in your code.

Detailed explanation-3: -The default projection plane is the plane z = 0 and the direction of the projection is along the z-axis. Thus, objects within this box are visible and projected. In OpenGL, the model-view and projection matrices are concatenated together to form the matrix that applies to geometric entities such as vertices.

Detailed explanation-4: -The ModelView matrix contains both modelling and viewing transformations that place the viewer at the origin with the view direction aligned with the negative Z axis. Clip Coordinates result from transforming Eye Coordinates by the Projection matrix.