Week05 黃冠中

#include<GL/glut.h>

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT);

    glPushMatrix();

       glRotatef(angle,0,1,0.5);

       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);

       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("02160120");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMotionFunc(motion);

    glutMainLoop();

}