Week03 蔡宜真

課堂作業1

打開Shapes，案右鍵可以更改形狀和顏色

課堂作業2

1.原本的三角形

#include<GL/glut.h>  

void display()

{

    glBegin(GL_POLYGON);

       glColor3f(1,1,0);

       glVertex3f(0.0,0.0,0.0);

       glVertex3f(1.0,0.0,0.0);

       glVertex3f(1.0,1.0,0.0);

     glEnd();

   //glutSolidTeapot(0.3);

     glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit(&argc, argv);  

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH); 

    glutCreateWindow("hello 3D");  

    glutDisplayFunc(display);  

    glutMainLoop();

}

2.再新增兩種顏色，可以做出有漸變效果的三角形

3.再新增紅色兩行，就可以幫三角形加入背景

程式碼:

#include<GL/glut.h>

void display()

{

       glClearColor(0.5,0.5,1,1);

       glClear(GL_COLOR_BUFFER_BIT);

       glBegin(GL_POLYGON);

       glColor3f(0.5,1,0);glVertex3f(-1.0,0.0,0.0);

       glColor3f(1,1,0);glVertex3f(0.0,1.0,0.0);

       glColor3f(1,0.2,0.2);glVertex3f(1.0,0.0,0.0);

     glEnd();

   //glutSolidTeapot(0.3);

     glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("hello 3D");

    glutDisplayFunc(display);

    glutMainLoop();

}

色彩選擇器點取圖片，可以新增顏色

用滑鼠點取圖片可以找到座標