:/ week02

打開GLUT 詳情看week01

複製以下程式碼

#include <GL/glut.h>

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

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("GLUT Shapes");

glutDisplayFunc(display);

glutMainLoop();

}

接著刪除全部程式碼

再加上

void display()

{

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

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

}

輸入 glColor3f(1,1,0); 上色

以此類推

把 glutSolidTeapot(0.5); 刪掉 加上頂點

glBegin(GL_POLYGON);

        glVertex2f(0,1);

        glVertex2f(-1,-1);

        glVertex2f(+1,-1);

    glEnd();

刪除 glColor3f(0,1,0); 

改成

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

四邊形

#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();

}

五個圓

#include <GL/glut.h>

#include <math.h>

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

{

    glBegin(GL_POLYGON);

        for(float a=0;a<2*3.14;a+=0.01){

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

        }

    glEnd();

}

void display() 上色+位置

{

    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();

}