Adding lighting to a solid sphere

Mon Mar 05, 2012 1:40 am

Adding lighting to a solid sphere using openGL light.

Code:: #include <GL\glut.h> GLfloat xRotated, yRotated, zRotated; GLdouble radius=0.5; GLfloat qaBlack[] = {0.0, 0.0, 0.0, 1.0}; //Black Color GLfloat qaGreen[] = {0.0, 1.0, 0.0, 1.0}; //Green Color GLfloat qaWhite[] = {1.0, 1.0, 1.0, 1.0}; //White Color GLfloat qaRed[] = {1.0, 0.0, 0.0, 1.0}; //White Color // Set lighting intensity and color GLfloat qaAmbientLight[] = {0.2, 0.2, 0.2, 1.0}; GLfloat qaDiffuseLight[] = {0.8, 0.8, 0.8, 1.0}; GLfloat qaSpecularLight[] = {1.0, 1.0, 1.0, 1.0}; GLfloat emitLight[] = {0.9, 0.9, 0.9, 0.01}; GLfloat Noemit[] = {0.0, 0.0, 0.0, 1.0}; // Light source position GLfloat qaLightPosition[] = {0.5, 0, -3.5, 0.5}; void display(void); void reshape(int x, int y); void idleFunc(void) { zRotated += 0.02; display(); } void initLighting() { // Enable lighting glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); // Set lighting intensity and color glLightfv(GL_LIGHT0, GL_AMBIENT, qaAmbientLight); glLightfv(GL_LIGHT0, GL_DIFFUSE, qaDiffuseLight); glLightfv(GL_LIGHT0, GL_SPECULAR, qaSpecularLight); // Set the light position glLightfv(GL_LIGHT0, GL_POSITION, qaLightPosition); } int main (int argc, char **argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH ); glutInitWindowSize(350,350); glutCreateWindow("Solid Sphere"); initLighting(); xRotated = yRotated = zRotated = 0.0; glutIdleFunc(idleFunc); glutDisplayFunc(display); glutReshapeFunc(reshape); glutMainLoop(); return 0; } void display(void) { glMatrixMode(GL_MODELVIEW); // clear the drawing buffer. glClear(GL_COLOR_BUFFER_BIT); // clear the identity matrix. glLoadIdentity(); // traslate the draw by z = -4.0 // Note this when you decrease z like -8.0 the drawing will looks far , or smaller. glTranslatef(0.0,0.0,-5.0); // scaling transfomation glScalef(1.0,1.0,1.0); glRotatef(zRotated,0.0,0.0,1.0); // Set material properties glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, qaGreen); glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, qaGreen); glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, qaWhite); glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 20); // built-in (glut library) function , draw you a sphere. glutSolidSphere(radius,25,25); // Flush buffers to screen glFlush(); glutSwapBuffers(); // sawp buffers called because we are using double buffering // glutSwapBuffers(); } void reshape(int x, int y) { if (y == 0 || x == 0) return; glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(39.0,(GLdouble)x/(GLdouble)y,0.6,21.0); glMatrixMode(GL_MODELVIEW); glViewport(0,0,x,y); //Use the whole window for rendering }

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Adding lighting to a solid sphere

Adding lighting to a solid sphere

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