模型視圖變換移動光源

#include <vgl.h>static int spin = 0; void init(void) {glClearColor(0.0,0.0,0.0,0.0);glShadeModel(GL_SMOOTH);glEnable(GL_LIGHTING);glEnable(GL_LIGHT0);glEnable(GL_DEPTH_TEST); } void display(void) {GLfloat position [] = {0.0,0.0,1.5,1.0};glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glPushMatrix();glTranslatef(0.0,0.0,-5.0);glPushMatrix();glRotatef((GLdouble)spin,1.0,0.0,0.0);glLightfv(GL_LIGHT0 , GL_POSITION, position);glTranslated(0.0,0.0,1.5);glDisable(GL_LIGHTING);glColor3f(0.0,1.0,1.0);glutWireCube(0.1);glEnable(GL_LIGHTING);glPopMatrix();glutSolidTorus(0.275,0.85,20,150);glPopMatrix();glFlush(); }void reshape(int w, int h) {glViewport(0,0,(GLsizei)w, (GLsizei)h);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(40,(GLfloat)w/(GLfloat)h,1.0,20.0);glMatrixMode(GL_MODELVIEW);glLoadIdentity(); }void mouse(int button, int state, int x, int y) {switch(button){case GLUT_LEFT_BUTTON:if( state == GLUT_DOWN ){spin = (spin+30)%360;glutPostRedisplay();}break;default:break;} }int main(int argc, char** argv) {glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE |GLUT_RGB|GLUT_DEPTH);glutInitWindowSize(400,400);glutInitWindowPosition(200,200);glutCreateWindow(argv[0]);init();glutDisplayFunc(display);glutReshapeFunc(reshape);glutMouseFunc(mouse);glutMainLoop();return 0; }輸出結果：

總結

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