Week10

#include<GL/glut.h>

#include<stdio.h>

#include<math.h>

float angleX=0,startX=0,angleY=0,startY=0;

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

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;

startX=x;

angleY += y-startY;

startY=y;

glutPostRedisplay();

}

void light()

{

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

glEnable(GL_LIGHT0);

    glEnable(GL_NORMALIZE);

    glEnable(GL_COLOR_MATERIAL);

    glEnable(GL_LIGHTING);

    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

}

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

{

printf("%c  %d  %d\n",key, x, y);

if(key=='a')angleX+=3;

if(key=='b')angleX-=3;

glutPostRedisplay();

}

void display()

{

glEnable(GL_DEPTH_TEST);

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glColor3f(0.5,0.5,1);

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);

    glutInitWindowSize(500,500);

    glutCreateWindow("Week10");

    

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    light();

    

    glutMainLoop();

}