COLORMAT.C
上传用户:tengyuc
上传日期:2007-08-14
资源大小:722k
文件大小:3k
- // 本程序演示如何使用glColorMaterial()函数修改对象的材质
#include <GL/glut.h>
#include <stdlib.h>
GLfloat diffuseMaterial[4] = { 0.5, 0.5, 0.5, 1.0 };
// 初始化材质特性、光源、光照模型和深度缓冲
void init(void)
{
GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
glClearColor (0.0, 0.0, 0.0, 0.0);
glShadeModel (GL_SMOOTH);
glEnable(GL_DEPTH_TEST);
glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuseMaterial);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialf(GL_FRONT, GL_SHININESS, 25.0);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glColorMaterial(GL_FRONT, GL_DIFFUSE);
glEnable(GL_COLOR_MATERIAL);
}
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glutSolidSphere(1.0, 20, 16);
glFlush ();
}
void reshape (int w, int h)
{
glViewport (0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode (GL_PROJECTION);
glLoadIdentity();
if (w <= h)
glOrtho (-1.5, 1.5, -1.5*(GLfloat)h/(GLfloat)w,
1.5*(GLfloat)h/(GLfloat)w, -10.0, 10.0);
else
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();
}
void mouse(int button, int state, int x, int y)
{
switch (button) {
case GLUT_LEFT_BUTTON:
if (state == GLUT_DOWN) {
diffuseMaterial[0] += 0.1;
if (diffuseMaterial[0] > 1.0)
diffuseMaterial[0] = 0.0;
glColor4fv(diffuseMaterial);
glutPostRedisplay();
}
break;
case GLUT_MIDDLE_BUTTON:
if (state == GLUT_DOWN) {
diffuseMaterial[1] += 0.1;
if (diffuseMaterial[1] > 1.0)
diffuseMaterial[1] = 0.0;
glColor4fv(diffuseMaterial);
glutPostRedisplay();
}
break;
case GLUT_RIGHT_BUTTON:
if (state == GLUT_DOWN) {
diffuseMaterial[2] += 0.1;
if (diffuseMaterial[2] > 1.0)
diffuseMaterial[2] = 0.0;
glColor4fv(diffuseMaterial);
glutPostRedisplay();
}
break;
default:
break;
}
}
void keyboard(unsigned char key, int x, int y)
{
switch (key) {
case 27:
exit(0);
break;
}
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize (500, 500);
glutInitWindowPosition (100, 100);
glutCreateWindow (argv[0]);
init ();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMouseFunc(mouse);
glutKeyboardFunc(keyboard);
glutMainLoop();
return 0;
}