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劃出方塊

使方塊旋轉

使四邊形旋轉

用滑鼠控制旋轉

#include <GL/glut.h>

float angle=0;

 void display(void)

{

   glClear(GL_COLOR_BUFFER_BIT);

   glPushMatrix();

   glRotatef(angle,0.5,0.3,0);

   glBegin(GL_POLYGON);

        glColor3f(1,0,0);

        glVertex3f(0.1,0.1,0.8);

        glVertex3f(-0.1,0.1,0.8);

        glVertex3f(-0.1,-0.1,0.8);

        glVertex3f(0.1,-0.1,0.8);

    glEnd();

    glBegin(GL_POLYGON);

        glColor3f(1,0,0);

        glVertex3f(0.1,0.1,-0.8);

        glVertex3f(-0.1,0.1,-0.8);

        glVertex3f(-0.1,-0.1,-0.8);

        glVertex3f(0.1,-0.1,-0.8);

    glEnd();

    glBegin(GL_QUAD_STRIP);

        glColor3f(0,0,1);

        glVertex3f(0.1,0.1,0.8);

        glVertex3f(0.1,0.1,-0.8);

        glVertex3f(-0.1,0.1,0.8);

        glVertex3f(-0.1,0.1,-0.8);

        glVertex3f(-0.1,-0.1,0.8);

        glVertex3f(-0.1,-0.1,-0.8);

        glVertex3f(0.1,-0.1,0.8);

        glVertex3f(0.1,-0.1,-0.8);

    glEnd();

    glPopMatrix();

 //   angle+=0.01;

    glFlush();

}

int oldx=0;

void motion(int x,int y)

{

angle+=(x-oldx);

oldx=x;

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutCreateWindow("12131232132132");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMotionFunc(motion);

    glutMainLoop();

}