binhun-week02

 #include <GL/glut.h>

void display()

{

    glutSolidTeapot(0.3);///畫出一個實心的茶壺 大小0.3

    glutSwapBuffers();///GLUT把畫面swap送到顯示的地方

}

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

{ ///上面是特別的main函式,有很多參數

glutInit(&argc, argv);///把GLUT開起來

glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);//把顯示的模式設定好

glutCreateWindow("GLUT Shapes");///要開視窗

glutDisplayFunc(display);///要顯示的對應函式

glutMainLoop();///最後用main迴圈,壓在最後面

}

glColor3f(0,1,0);將茶壺上黃色

glColor3f(0,1,0);///換綠色

glutSolidTeapot(0.5);///更改大小

將綠色茶壺刪掉

glBegin(GL_POLYGON);///開始畫多邊形

        glVertex2f(0,1);

        glVertex2f(-1,-1);

        glVertex2f(+1,-1);

    glEnd();

加入顏色

glColor3f(1,0,0); glVertex2f(0,1);///紅色頂點

 glColor3f(0,1,0); glVertex2f(-1,-1);///綠色頂點

 glColor3f(0,0,1); glVertex2f(+1,-1);///藍色頂點

換上背景

glColor3f(247/255.0,247/255.0,247/255.0);

    glBegin(GL_POLYGON);

        glVertex2f(1,1);

        glVertex2f(-1,1);

        glVertex2f(-1,-1);

        glVertex2f(1,-1);

    glEnd();

換上皮卡丘肚肚

 glColor3f(244/255.0,209/255.0,33/255.0);

    glBegin(GL_POLYGON);

        glVertex2f( (45-100)/100.0,-(134-100)/100.0 );

        glVertex2f( (36-100)/100.0,-(171-100)/100.0);

        glVertex2f( (108-100)/100.0,-(179-100)/100.0);

        glVertex2f( (104-100)/100.0,-(117-100)/100.0);

        ///座標減一半,除一半,y變負號

    glEnd();

加上#include <math.h>///cos和sin要用

for(float a=0;a<2*3.141592653589793238462632383279; a+=0.01){

        glVertex2f(cos(a),sin(a));

        }

畫出一個大圓

glColor3f(1,0,1); myCircle(0.6,0,0);///正中間

 glColor3f(1,0,0); myCircle(0.3,0.5,0.5);左上

 glColor3f(0,1,0); myCircle(0.3,-0.5,0.5);右上

 glColor3f(1,1,0); myCircle(0.3,-0.5,-0.5);左下

 glColor3f(0,0,1); myCircle(0.3,0.5,-0.5);右下

畫五顆大球球