![void displaySolid ()
{
//set properties of the surface material
GLfloat mat_ambient[] = {1.0, 0.0, 0.0, 1.0};
GLfloat mat_diffuse[] = {1.0, 1.0, 0.0, 1.0};
GLfloat mat_specular[] = {0.0, 1.0, 0.0, 1.0};
GLfloat mat_shininess[] = {50.0};
glMaterialfv (GL_FRONT, GL_AMBIENT, mat_ambient);
glMaterialfv (GL_FRONT, GL_DIFFUSE, mat_diffuse);
glMaterialfv (GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv (GL_FRONT, GL_SHININESS, mat_shininess);
//set the light source properties
GLfloat lightIntensity[] = {1.0, 1.0, 1.0, 1.0};
GLfloat light_position[] = {2.0, 6.0, 3.0, 0.0};
glLightfv (GL_LIGHT0, GL_POSITION, light_position);
glLightfv (GL_LIGHT0, GL_DIFFUSE, lightIntensity);](https://image.slidesharecdn.com/program7-160603103521/85/10CSL67-CG-LAB-PROGRAM-7-5-320.jpg)
10CSL67 CG LAB PROGRAM 7
- 1. PROGRAM 7 Program using OpenGL functions, to draw a simple shaded scene consisting of a tea pot on a table. Define suitably the position and properties of the light source along with the properties of surfaces of the solid object used in the scene.
- 2. #include <GL/glut.h> void wall (double thickness) { //draw thin wall with top = xz-plane, corner at origin glPushMatrix(); glTranslated (0.5, 0.5 * thickness, 0.5); glScaled (1.0, thickness, 1.0); glutSolidCube (1.0); glPopMatrix(); } After transformation
- 3. void tableLeg (double thick, double len) //draw one table leg { glPushMatrix(); glTranslated (0, len/2, 0); glScaled (thick, len, thick); glutSolidCube (1.0); glPopMatrix(); } 1 23 4 floor
- 4. //draw the table - a top and four legs, draw the top first void table (double topWid, double topThick, double legThick, double legLen) { glPushMatrix(); glTranslated (0, legLen, 0); glScaled(topWid, topThick, topWid); glutSolidCube (1.0); // table top glPopMatrix(); double dist = topWid/2.0 - legThick/2.0; glPushMatrix(); glTranslated (dist, 0, dist); tableLeg (legThick, legLen); // 1 glTranslated (0.0, 0.0, -2 * dist); tableLeg (legThick, legLen); // 2 glTranslated (-2*dist, 0, 2 *dist); tableLeg (legThick, legLen); // 3 glTranslated(0, 0, -2*dist); tableLeg (legThick, legLen); // 4 glPopMatrix(); } 1 23 4 floor Table top
- 5. void displaySolid () { //set properties of the surface material GLfloat mat_ambient[] = {1.0, 0.0, 0.0, 1.0}; GLfloat mat_diffuse[] = {1.0, 1.0, 0.0, 1.0}; GLfloat mat_specular[] = {0.0, 1.0, 0.0, 1.0}; GLfloat mat_shininess[] = {50.0}; glMaterialfv (GL_FRONT, GL_AMBIENT, mat_ambient); glMaterialfv (GL_FRONT, GL_DIFFUSE, mat_diffuse); glMaterialfv (GL_FRONT, GL_SPECULAR, mat_specular); glMaterialfv (GL_FRONT, GL_SHININESS, mat_shininess); //set the light source properties GLfloat lightIntensity[] = {1.0, 1.0, 1.0, 1.0}; GLfloat light_position[] = {2.0, 6.0, 3.0, 0.0}; glLightfv (GL_LIGHT0, GL_POSITION, light_position); glLightfv (GL_LIGHT0, GL_DIFFUSE, lightIntensity);
- 9. //set the camera glMatrixMode (GL_PROJECTION); glLoadIdentity(); glOrtho (-1.0, 1.0, -1.0, 1.0, 0.1, 100.0); glMatrixMode (GL_MODELVIEW); glLoadIdentity(); gluLookAt (2.0, 1.0, 2.0, 0.0, 0.1, 0.0, 0.0, 1.0, 0.0); //start drawing glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // delete the next 5 push and pop statements glPushMatrix(); glTranslated (0.6, 0.38, 0.5); // position of tea pot glRotated (30, 0, 1, 0); glutSolidTeapot (0.08); // 0.08 = size of the tea pot glPopMatrix (); Original image without rotation After rotation
- 10. // delete the next 3 push and pop statements glPushMatrix(); glTranslated (0.4, 0, 0.4); table (0.6, 0.02, 0.02, 0.3); //table glPopMatrix(); wall (0.02); // floor glPushMatrix(); glRotated (90.0, 0.0, 0.0, 1.0); wall (0.02); // left glPopMatrix(); glPushMatrix(); glRotated (-90.0, 1.0, 0.0, 0.0); wall (0.02); // right glPopMatrix(); glFlush(); }
- 11. void main (int argc, char ** argv) { glutInit (&argc, argv); glutInitDisplayMode (GLUT_SINGLE|GLUT_RGB|GLUT_DEPTH); glutInitWindowSize (500, 500); glutCreateWindow ("tea pot on a table"); glutDisplayFunc (displaySolid); glEnable (GL_LIGHTING); glEnable (GL_LIGHT0); glEnable (GL_DEPTH_TEST); glEnable (GL_NORMALIZE); glutMainLoop(); }