Claire 的課堂作業 week2

計算機圖學 Computer Graphics

1. 主題：點、線、面、色彩
2. 實作：OpenGL, GLUT, WebGL
3. 親手打早第一個圖學程式

// call lib GLUT extention

#include <GL/glut.h>

void display()

{

glClearColor(0.5,0.4,0,0);

// setting the clear color

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

// use the COLOR to clear the window background (it is an active)

glColor3f(1,1,0.5);

// 3 color parameter using float type (0.0-1.0)

glutSolidTeapot(0.3);

// draw a teapot on the screen

glBegin(GL_POLYGON);

// start to draw ploygon = 多邊形

glVertex3f(1, -1, 0);

glVertex3f(-1, 1, 0);

glVertex3f(-1, 0, 0);

// 3f : x, y, z 3 parameters

glEnd();

// end an draw

glutSwapBuffers();

// clear the buffer, avoid 畫面閃爍的問題

}

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

{

glutInit(&argc, argv);

// start to use "GLUT". Catch above parameters

glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

// setting display mode

        glutCreateWindow("GLUT Shapes");

// create GLUT 3D window

glutDisplayFunc(display);

glutMainLoop();

// let main() function keep running

}