How to implement shading in OpenGL /@author: Christopher Amadra Titus/
#include <GL/glut.h>
#include <GL/gl.h>
#include <iostream>
#include <stdio.h>
void test(void) {
glClearColor(1.0, 1.0, 1.0, 1.0);
glEnable(GL_DEPTH_TEST);
}
void drawTeaPot(void) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1.0, 1.0, 1.0);
GLfloat light_position[] = {1.0, 1.0, 1.0, 0.0};
GLfloat mat_diffuse[] = {0.7, 0.4, 0.1, 1.0};
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glutSolidTeapot(1.0);
glFlush();
}
void reshape(int x, int y) {
glViewport(0, 0, (GLsizei)x, (GLsizei)y);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(55.0, (GLfloat)x / (GLfloat)y, 1.0, 20.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -3.0);
}
int main(int argc, char** argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(800,600);
glutInitWindowPosition(0,0);
glutCreateWindow("Drawing a Teapot and applying color to it.");
test();
glutDisplayFunc(drawTeaPot);
glutReshapeFunc(reshape);
glutMainLoop();
return 0;
}
Final Output
