Computer Graphics Practical.

1. Point
CPoint(n)
2. Mesh
Quad or Triangle construction from Points
3. FillMesh
Using polygon filling algorithm to determine each point in polygon
4. Calculate each point's color with light & texture

For vertexs
Ambient light: Ambient Light Intensity * Ambient Reflection Coefficient * RGB
Diffuse light: Diffuse Light Intensity * Diffuse Reflection Coefficient *cos(θ)* RGB
-->L vector = Light Position - Point ; N vector = Point Normal;
--> cos(θ) = L · N/|L||N|

For other p0ints
Gourand: Each vertex color of the mesh -> BilinearInterpolation ->This Point Color
Phong: Each vertex normal of the mesh -> BilinearInterpolation -> This Point Normal -> Color