15-462 Lecture 8: Shading in OpenGL

02/06/2003

15-462 Graphics I

33

Extrusion of Midpoints

•Re-normalize midpoints to lie on unit sphere

void subdivide(GLfloat v1[3], GLfloat v2[3],

GLfloat v3[3], int depth)

{ ...

normalize(v12);

normalize(v23);

normalize(v31);

subdivide(v1, v12, v31, depth-1);

subdivide(v2, v23, v12, depth-1);

subdivide(v3, v31, v23, depth-1);

subdivide(v12, v23, v31, depth-1);

}