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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 1.iso
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opengl
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molehill.c
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C/C++ Source or Header
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1996-11-11
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4KB
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145 lines
#include <GL/glut.h>
GLfloat mat_red_diffuse[] = { 0.7, 0.0, 0.1, 1.0 };
GLfloat mat_green_diffuse[] = { 0.0, 0.7, 0.1, 1.0 };
GLfloat mat_blue_diffuse[] = { 0.0, 0.1, 0.7, 1.0 };
GLfloat mat_yellow_diffuse[] = { 0.7, 0.8, 0.1, 1.0 };
GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat mat_shininess[] = { 100.0 };
GLfloat knots[8] = { 0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0 };
GLfloat pts1[4][4][3], pts2[4][4][3];
GLfloat pts3[4][4][3], pts4[4][4][3];
GLUnurbsObj *nurb;
int u, v;
static void
display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glCallList(1);
glFlush();
}
int
main(int argc, char **argv)
{
glutInit(&argc, argv);
glutCreateWindow("molehill");
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);
nurb = gluNewNurbsRenderer();
gluNurbsProperty(nurb, GLU_SAMPLING_TOLERANCE, 25.0);
gluNurbsProperty(nurb, GLU_DISPLAY_MODE, GLU_FILL);
/* Build control points for NURBS mole hills. */
for(u=0; u<4; u++) {
for(v=0; v<4; v++) {
/* Red. */
pts1[u][v][0] = 2.0*((GLfloat)u);
pts1[u][v][1] = 2.0*((GLfloat)v);
if((u==1 || u == 2) && (v == 1 || v == 2))
/* Stretch up middle. */
pts1[u][v][2] = 6.0;
else
pts1[u][v][2] = 0.0;
/* Green. */
pts2[u][v][0] = 2.0*((GLfloat)u - 3.0);
pts2[u][v][1] = 2.0*((GLfloat)v - 3.0);
if((u==1 || u == 2) && (v == 1 || v == 2))
if(u == 1 && v == 1)
/* Pull hard on single middle square. */
pts2[u][v][2] = 15.0;
else
/* Push down on other middle squares. */
pts2[u][v][2] = -2.0;
else
pts2[u][v][2] = 0.0;
/* Blue. */
pts3[u][v][0] = 2.0*((GLfloat)u - 3.0);
pts3[u][v][1] = 2.0*((GLfloat)v);
if((u==1 || u == 2) && (v == 1 || v == 2))
if(u == 1 && v == 2)
/* Pull up on single middple square. */
pts3[u][v][2] = 11.0;
else
/* Pull up slightly on other middle squares. */
pts3[u][v][2] = 2.0;
else
pts3[u][v][2] = 0.0;
/* Yellow. */
pts4[u][v][0] = 2.0*((GLfloat)u);
pts4[u][v][1] = 2.0*((GLfloat)v - 3.0);
if((u==1 || u == 2 || u == 3) && (v == 1 || v == 2))
if(v == 1)
/* Push down front middle and right squares. */
pts4[u][v][2] = -2.0;
else
/* Pull up back middle and right squares. */
pts4[u][v][2] = 5.0;
else
pts4[u][v][2] = 0.0;
}
}
/* Stretch up red's far right corner. */
pts1[3][3][2] = 6;
/* Pull down green's near left corner a little. */
pts2[0][0][2] = -2;
/* Turn up meeting of four corners. */
pts1[0][0][2] = 1;
pts2[3][3][2] = 1;
pts3[3][0][2] = 1;
pts4[0][3][2] = 1;
glMatrixMode(GL_PROJECTION);
gluPerspective(55.0, 1.0, 2.0, 24.0);
glMatrixMode(GL_MODELVIEW);
glTranslatef(0.0, 0.0, -15.0);
glRotatef(330.0, 1.0, 0.0, 0.0);
glNewList(1, GL_COMPILE);
/* Render red hill. */
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_red_diffuse);
gluBeginSurface(nurb);
gluNurbsSurface(nurb, 8, knots, 8, knots,
4 * 3, 3, &pts1[0][0][0],
4, 4, GL_MAP2_VERTEX_3);
gluEndSurface(nurb);
/* Render green hill. */
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_green_diffuse);
gluBeginSurface(nurb);
gluNurbsSurface(nurb, 8, knots, 8, knots,
4 * 3, 3, &pts2[0][0][0],
4, 4, GL_MAP2_VERTEX_3);
gluEndSurface(nurb);
/* Render blue hill. */
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_blue_diffuse);
gluBeginSurface(nurb);
gluNurbsSurface(nurb, 8, knots, 8, knots,
4 * 3, 3, &pts3[0][0][0],
4, 4, GL_MAP2_VERTEX_3);
gluEndSurface(nurb);
/* Render yellow hill. */
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_yellow_diffuse);
gluBeginSurface(nurb);
gluNurbsSurface(nurb, 8, knots, 8, knots,
4 * 3, 3, &pts4[0][0][0],
4, 4, GL_MAP2_VERTEX_3);
gluEndSurface(nurb);
glEndList();
glutDisplayFunc(display);
glutMainLoop();
return 0; /* ANSI C requires main to return int. */
}