opengl 移动光源

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opengl 移动光源

2013年10月06日 ⁄ 综合 ⁄ 共 1338字 ⁄ 字号小中大 ⁄ 评论关闭

#include <glut.h>
#include <stdlib.h>

static int spin = 0;

void init()
{
glClearColor(1.0,1.0,1.0,0.0);
glShadeModel(GL_SMOOTH);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
}

void display()
{
GLfloat postion[] = {0.0, 0.0, 1.5, 1.0};
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glPushMatrix();
gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 0.1, 0.0);

glPushMatrix();
glRotated((GLdouble)spin, 1.0, 0.0, 0.0);
glLightfv(GL_LIGHT0, GL_POSITION, postion);

glTranslated(0.0,0.0,1.5);
glDisable(GL_LIGHTING);

   glColor3f(1.0, 0.3, 0.3);
   glutWireSphere(0.07, 8, 8);
   glEnable(GL_LIGHTING);
glPopMatrix();

glutSolidTorus(0.275, 0.85, 50, 200);
glPopMatrix();
glFlush();
glutSwapBuffers();
}

void reshape(int w, int h)
{
glViewport(0, 0, (GLsizei)w, (GLsizei)h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(40.0, (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 + 10) % 360;
         glutPostRedisplay();
}
   break;
default:
   break;
}
}

int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RED | GLUT_DEPTH);
glutInitWindowSize(500, 500);
glutInitWindowPosition(100, 100);
glutCreateWindow("move light");

init();

glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMouseFunc(mouse);

glutMainLoop();

return 0;
}