茶壺轉轉

                                                                     /*鍵盤控制*/
#include <GL/glut.h>
#include <stdio.h>
float angleX=0;
void keyboard(unsigned char key, int x,int y)
{
printf("%c  %d %d\n",key,x,y);//xy座標
     if(key=='a') angleX +=3;
     if(key=='b') angleX -=3;
     glutPostRedisplay();
}
void mylight()//打光
{
const GLfloat light_position[] = { 2.0f, 5.0f, 0.0f, 0.0f };
glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);
        glLightfv(GL_LIGHT0, GL_POSITION, light_position);
}
void display()
{
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angleX,0,1,0);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
int main()
{
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week10");
glutDisplayFunc(display);
glutKeyboardFunc(keyboard);
mylight();
glutMainLoop();
}

/*滑鼠控制*/

void mouse(int button,int state,int x,int y)

{

printf("%d %d %d %d\n",button,state,x,y);

startX=x;

}

void motion(int x,int y)

{

printf("%d %d\n",x,y);

angleX=x-startX;

glutPostRedisplay();

}

void keyboard(unsigned char key, int x,int y)

{

printf("%c  %d %d\n",key,x,y);//xy座標 

     if(key=='a') angleX +=3;

     if(key=='b') angleX -=3;

     glutPostRedisplay();

}

/*加上y軸控制*/

void mouse(int button,int state,int x,int y)

{

printf("%d %d %d %d\n",button,state,x,y);

startX=x;

startY=y;

}

void motion(int x,int y)

{

printf("%d %d\n",x,y);

angleX+=x-startX; startX=x;

angleY+=y-startY; startY=y;

glutPostRedisplay();

}

/*完整版*/

#include <GL/glut.h>

#include <stdio.h>

#include <math.h>

float m[16]={1,0,0,0, 0,1,0,0 , 0,0,1,0, 0,0,0,1};

float angleX=0,angleY=0;

float startX=0,startY=0; 

void mouse(int button,int state,int x,int y)

{

printf("%d %d %d %d\n",button,state,x,y);

startX=x;

startY=y;

}

void motion(int x,int y)

{

printf("%d %d\n",x,y);

angleX=x-startX; startX=x;

angleY=y-startY; startY=y;

glutPostRedisplay();

}

void keyboard(unsigned char key, int x,int y)

{

printf("%c  %d %d\n",key,x,y);//xy座標 

     if(key=='a') angleX +=3;

     if(key=='b') angleX -=3;

     glutPostRedisplay();

}

void mylight()//打光 

{

const GLfloat light_position[] = { 2.0f, 5.0f, 0.0f, 0.0f };

glEnable(GL_LIGHT0);

    glEnable(GL_NORMALIZE);

    glEnable(GL_COLOR_MATERIAL);

    glEnable(GL_LIGHTING);

        glLightfv(GL_LIGHT0, GL_POSITION, light_position);

}

void display()

{

glEnable(GL_DEPTH_TEST);

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

/* glRotatef(angleX,0,1,0);

glRotatef(angleY,1,0,0);

glutSolidTeapot(0.3);

*/

float dist=sqrt(angleX*angleX+angleY*angleY);

glRotatef(dist,-angleY,-angleX,0);

glMultMatrixf(m);

glGetFloatv(GL_MODELVIEW_MATRIX,m);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

int main()

{

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("week10");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);

glutMouseFunc(mouse);

glutMotionFunc(motion);

mylight();

glutMainLoop();

}