Q1. Describe the Constructive Solid Geometry (or CSG) method for solid modeling. In brief describe how ray-casting techniques are used to implement the CSG operations.
Q2. What are Octrees and why are they helpful? Explain how are they implemented?
Q3. Describe the Z-Buffer method of the Hidden Surface removal.
Q4. Describe the Depth-sorting method for the elimination of Hidden surfaces. Illustrate the basic functions it performs?
Q5. Compute the pixel color value at the centroid of the triangle as illustrated below. The figure describes the coordinates and the color of the vertices of the triangle. Use the Gouraud interpolation method for interpolation.
Q6. Describe the Phong shading model for the rendering of polygon surfaces.