week06

今天教了把杯子可以按w移動案e轉動，還可以讓杯子自動轉動

#include <GL/glut.h>
const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };
const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };
const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };
const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat high_shininess[] = { 100.0f };

int type=1;
float teapotX=0, teapotY=0;
float teapotRotY=0;///轉動的變數
int oldX=0, oldY=0;
void mouse(int button,int state,int x,int y)
{   ///mouse要可移動teapot 
    oldX=x;
    oldY=y;
}
void motion(int x,int y)
{
    if(type==1)///轉動
    {
        teapotRotY += x-oldX;
    }else if(type==2)///移動
    {
         teapotX += x-oldX;
         teapotY += y-oldY;
    }
    oldX=x;
    oldY=y;
    glutPostRedisplay();///更新畫面
}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();///備分矩陣
        glTranslatef( teapotX/250.0, -teapotY/250.0, 0);
        glRotatef(teapotRotY, 0, -1,0);///x方向的動 vs y軸
        glutSolidTeapot(0.3);
    glPopMatrix();///備分矩陣
    glutSwapBuffers();
    teapotRotY++;///每次多轉動1度
}
void keyboard(unsigned char key, int x,int y)
{
    if(key=='e' || key =='E')type=1;///maya:轉動
    if(key=='w' || key =='W')type=2;///maya:移動
}
int main(int argc, char *argv[])
{

    glutInit(&argc, argv);
    glutInitWindowSize(500,500);
    glutInitWindowPosition(10,10);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("GLUT Shapes");

    glutDisplayFunc(display);
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutKeyboardFunc(keyboard);
    glutIdleFunc(display);

    glEnable(GL_DEPTH_TEST);

    glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);


    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);


    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
    glutMainLoop();



    return EXIT_SUCCESS;

}