week02020202

 week02-1

1.new projec選擇openGLUT

2.紅色球就出現了

week02-2

稍微更改一 下程式碼

就變成茶壺了!

讓他變成黃色 並多新增一個綠色大茶壺

利用點的位置畫三角形

還可以變成彩色的

#include <GL/glut.h>

void display()

{

    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();

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);

    glEnd();

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutDisplayFunc(display);

    glutMainLoop();

}

#include <GL/glut.h>

#include <math.h>

void myCircle(float r, float x, float y)

{

    glBegin(GL_POLYGON);

      for(float a = 0; a<2*3.1415926; a+=0.01){

            glVertex2f(r*cos(a)+x, r*sin(a)+y);

      }

    glEnd();

}

void display()

{

    glColor3f(1,0,1); myCircle(0.6, 0, 0);

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

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

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

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

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutDisplayFunc(display);

    glutMainLoop();

}