OpenGL光照演示

#include <GL/glut.h>#define WIDTH 400;#define HEIGHT 400;static GLfloat angle = 0.0f;void myDisplay(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //創建透視效果 glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(90.0f, 1.0f, 1.0f, 20.0f); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(0.0, 5.0, -10.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); //定義太陽光源 { GLfloat sun_light_position[] = { 0.0f,0.0f,0.0f,1.0f }; GLfloat sun_light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f }; GLfloat sun_light_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f }; GLfloat sun_light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f }; glLightfv(GL_LIGHT0, GL_POSITION, sun_light_position); glLightfv(GL_LIGHT0, GL_AMBIENT, sun_light_ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE, sun_light_diffuse); glLightfv(GL_LIGHT0, GL_SPECULAR, sun_light_specular); glEnable(GL_LIGHT0); glEnable(GL_LIGHTING); glEnable(GL_DEPTH_TEST); } //定義太陽的材質並繪製太陽 { GLfloat sun_mat_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f }; GLfloat sun_mat_diffuse[] = { 0.0f, 0.0f, 0.0f, 1.0f }; GLfloat sun_mat_specular[] = { 0.0f, 0.0f, 0.0f, 1.0f }; GLfloat sun_mat_emission[] = { 0.5f, 0.0f, 0.0f, 1.0f }; GLfloat sun_mat_shininess = 0.0f; glMaterialfv(GL_FRONT, GL_AMBIENT, sun_mat_ambient); glMaterialfv(GL_FRONT, GL_DIFFUSE, sun_mat_diffuse); glMaterialfv(GL_FRONT, GL_SPECULAR, sun_mat_specular); glMaterialfv(GL_FRONT, GL_EMISSION, sun_mat_emission); glMaterialf(GL_FRONT, GL_SHININESS, sun_mat_shininess); glutSolidSphere(2.0, 40, 32); } //定義地球的材質並繪製地球 { GLfloat earth_mat_ambient[] = { 0.0f, 0.0f, 0.5f, 1.0f }; GLfloat earth_mat_diffuse[] = { 0.0f, 0.0f, 0.5f, 1.0f }; GLfloat earth_mat_specular[] = { 0.0f, 0.0f, 1.0f, 1.0f }; GLfloat earth_mat_emission[] = { 0.0f, 0.0f, 0.0f, 1.0f }; GLfloat earth_mat_shininess = 30.0f; glMaterialfv(GL_FRONT, GL_AMBIENT, earth_mat_ambient); glMaterialfv(GL_FRONT, GL_DIFFUSE, earth_mat_diffuse); glMaterialfv(GL_FRONT, GL_SPECULAR, earth_mat_specular); glMaterialfv(GL_FRONT, GL_EMISSION, earth_mat_emission); glMaterialf(GL_FRONT, GL_SHININESS, earth_mat_shininess); glRotatef(angle, 0.0f, -1.0f, 0.0f); glTranslatef(5.0f, 0.0f, 0.0f); glutSolidSphere(2.0, 40, 32); } glutSwapBuffers();}void myIdle(void) { angle += 1.0f; if (angle >= 360.0f) { angle = 0.0f; } myDisplay();}int main(int argc, char* argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE); glutInitWindowPosition(200, 200); glutInitWindowSize(400,400); glutCreateWindow("OpenGL 光照演示"); glutDisplayFunc(&myDisplay); glutIdleFunc(&myIdle); glutMainLoop(); return 0;}