Simple wire framed figure with motion (demo use of Stencil)

Description:  The main intent of this program is to demo the stencil plane functionality, hence the rendering is kept  simple (wire frame). Usese: Right click to choose the motion and the Stencil on/off. The Project Code: #include <stdio.h> #include <stdlib.h> #include <string.h> #include <GL/glut.h> static int stencilOn = 1; /* function declarations */ void drawScene(void), setMatrix(void), animation(void), resize(int w, int h),   keyboard(unsigned char c, int x, int y), menu(int choice), drawWireframe(int face),   drawFilled(int face); /* global variables */ float ax, ay, az;       /* angles for animation */ /* coords of a cube */ static GLfloat cube[8][3] = {0.0, 0.0, 0.0,   1.0, 0.0, 0.0,   1.0, 0.0, 1.0,   0.0, 0.0, 1.0,   1.0, 1.0, 0.0,   1.0, 1.0, 1.0,   0.0, 1.0, 1.0,   0.0, 1.0, 0.0}; static int faceIndex[6][4] = {0, 1, 2, 3,   1, 4, 5, 2,   4, 7, 6, 5,   7, 0, 3, 6,   3, 2, 5, 6,   7, 4, 1, 0}; int main(int argc, char **argv) {   glutInit(&argc, argv); …