week06

移動茶壺

#include <GL/glut.h>


///光的陣列值

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 }; ///改變光源角度
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 };


float teapotX=0,teapotY=0;
int oldX=0,oldY=0;
void mouse(int button,int state,int x,int y){
    oldX=x;
    oldY=y;
}

void motion(int x,int y){
    teapotX += x-oldX;
    teapotY += y-oldY;
    oldX=x;
    oldY=y;
    glutPostRedisplay();
}



void display(){

///茶壺程式碼

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glTranslated(teapotX/250.0,teapotY/250.0,0);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);
    glutInitWindowSize(500,500);  ///視窗大小
    glutInitWindowPosition(10,10);  ///視窗位置
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("GLUT Shapes");
    glutDisplayFunc(display);
    glutMouseFunc(mouse);
    glutMotionFunc(motion);



    glEnable(GL_DEPTH_TEST);

    ///open light
    glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);

    ///光的設定值

    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);

    ///物體的material

    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;

}