Week 4 P.L 課堂筆記

One. 架設GLUT架構 (Teapot) (review)

Two. Mouse Control

     1. glutMouseFunc(mouse);

          (1) 滑鼠動作

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

{

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

}

          (2) 換顏色

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

{

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

    glColor3f(x /500.0, 1, y / 500.0);

    glutPostRedisplay();

}

     2. glutMotionFunc();  ///可移動換顏色

void motion(int x, int y)

{

    printf("%d %d\n",x,y);

    glColor3f(x /500.0, 1, y / 500.0);

    glutPostRedisplay();

}

Three. Shape

Using Sine & Cosine to draw a circle

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glBegin(GL_POLYGON);

        for(float angle=0 ; angle < 3.141592 * 2 ; angle+=0.001){

            glVertex2f(cos(angle),sin(angle));

        }

    glEnd();

    glutSwapBuffers();

}