Rendering

Polygon Shading

Implementation

OpenGL

Material properties
{r g b a}
Glfloat mat_d[] = {0.1, 0.2, 0.8, 1.0}

glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_d)

Normal vector

glNormal3f(nx, ny, nz)
glVertex3f(nx, ny, nz)