week03_吳宗諺

將上週的茶壺上色

glColor3f();

繪製三個茶壺

上不同顏色

    glColor3f(1,0,0);

    glutSolidTeapot(0.5);

    glColor3f(0,1,0);

    glutSolidTeapot(0.4);

    glColor3f(0,0,1);

    glutSolidTeapot(0.3);

(先修改顏色再繪圖形)

背景顏色改變

    glClearColor(0.2,0.5,0.8,1);

    glClear(GL_COLOR_BUFFER_BIT);

繪畫面
  glBegin(GL_POLYGON); //開始
        glVertex2f(0,0);  //座標
        glVertex2f(1,0);
        glVertex2f(0,1);
   glEnd(); //結束

   glBegin(GL_POLYGON);
        glColor3f(1,0,0);
        glVertex2f(0,0);
        glColor3f(0,1,0);
        glVertex2f(-1,0);
        glColor3f(0,0,1);
        glVertex2f(0,-1);
    glEnd();