Note week06

(1) 複習上周進度
(2) 編譯上周  Transformation 程式


(4) 打光 Lighting

    GLfloat pos[] = {0.0,0.0,-1.0,0.0};

    glEnable(GL_DEPTH_TEST);
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glLightfv(GL_LIGHT0, GL_POSITION, pos);

(5) mouse & keyboard

    

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

{

    printf("now: %c (%d %d)\n", key, x, y);

}

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

{

}

int main(...)

{
    .
    .
    .
    glutKeyboardFunc(keyboard);
    glutMouseFunc(mouse);
    .
    .
    .
    glutMainLoop();
}

(6) 旋轉 with keyboard

void keyboard(unsigned char key, int x, int y)
{
    printf("now: %c (%d %d)\n", key, x, y);
    if(key=='1') rotateX ++;
    if(key=='2') rotateY ++;
    if(key=='3') rotateZ ++;
    glutPostRedisplay(); //發出更新畫面要求
}

void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glRotatef(rotateX, 1, 0, 0);
        glRotatef(rotateY, 0, 1, 0);
        glRotatef(rotateZ, 0, 0, 1);
        drawmodel();
    glPopMatrix();
    glutSwapBuffers();
}

(7) 旋轉 with mouse

   

int oldX= 0, oldY= 0;

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

{

    //ya

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

    if(state== GLUT_DOWN)

    {

        oldX= x;

        oldY= y;

    }

}

void motion(int x, int y)

{

    rotateY += -(x-oldX);

    rotateX += -(y-oldY);

    oldX= x;

    oldY= y;

    glutPostRedisplay();

}

int main()

{

    .

    .

    .

    glutMotionFunc(motion);

    .

    .

    .

}