week04_黃登煜

#include <stdio.h>
#include <GL/glut.h>
float teapotX=0, teapotY=0, angle=0; 
int oldX=0, oldY=0, nowRotate=0; 
void display()
{
    glClear(GL_COLOR_BUFFER_BIT  | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
    glTranslatef(teapotX, teapotY, 0); 
    glRotatef(angle,0,0,1); 
    glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers(); 
}
void motion(int x, int y) //mouse motion 事件
{
    if(nowRotate==1) angle += (x-oldX);
    else
    {
        teapotX += (x-oldX)/150.0; 
        teapotY += (oldY-y)/150.0; 
    }
    oldX=x; oldY=y;
    glutPostRedisplay();
}
void mouse (int button, int state ,int x,int y)
{
    if(button==GLUT_LEFT_BUTTON&&state==GLUT_DOWN) nowRotate=1; 
    if(button==GLUT_RIGHT_BUTTON&&state==GLUT_DOWN) nowRotate=0; 
    oldX=x; oldY=y;
}
int main(int argc, char** argv)
{
   glutInit(&argc,argv);
   glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
   glutCreateWindow("Week03 Mouse");
   glutDisplayFunc(display);
   glutMouseFunc(mouse);
   glutMotionFunc(motion);
   glutMainLoop();

}