i am trying to make 2 partly transparent tepots with a light source. i can’t see what is wrong with the code below:
#include <GL/glut.h>
#include <stdio.h>
void init(void)
{
glShadeModel (GL_SMOOTH);
GLfloat mat_specular = { 1.0, 1.0, 1.0, 1.0 };
GLfloat mat_shininess = { 50.0 };
GLfloat light_position = { 1.0, 1.0, 1.0, 0.0 };
// glClearColor (0.0, 0.0, 0.0, 0.0);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
}void display(void)
{glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable (GL_DEPTH_TEST);glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glColor4f(0.5, 0.5, 0.5, 0.5);
glutSolidTeapot (1.5);
glColor4f(0.5, 0.5, 0.5, 0.5);
glutSolidTeapot (1.0);
glFlush ();
}void reshape (int w, int h)
{
glViewport (0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode (GL_PROJECTION);
glLoadIdentity();
glOrtho (-1.5*(GLfloat)w/(GLfloat)h, 1.5*(GLfloat)w/(GLfloat)h, -1.5, 1.5, -10.0, 10.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize (800, 600);
glutInitWindowPosition (100, 100);
glutCreateWindow (argv[0]);
init ();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMainLoop();
return 0;
}