0.0 week02 點、線、面、色彩

 Week02

STEP01

開啟CODEBLOCK

開專案

打專案名稱 選擇檔案存檔位置

解壓縮freeglut

開啟freeglut>lib>複製libfreeglut>貼上名稱改成libglut32

codeblock選擇freeglut完成>他跑出來就會生成三個神祕圖形

之後把程式碼全部刪掉，改成以下程式碼

#include <GL/glut.h>

void display()

{

        glutSolidTeapot(0.3);

        glutSwapBuffers();

}

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

    {

        glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutDisplayFunc(display);

    glutMainLoop();

    }

就會出現神奇白色茶壺喔

STEP02-1

再把程式把改一下

#include <GL/glut.h>

void display()

{

    glColor3f(1,1,0);///顏色 黃色

    glutSolidTeapot(0.5);///大小

    glColor3f(0,1,0);///顏色 綠色

        glutSolidTeapot(0.3);///大小

        glutSwapBuffers();

}

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

    {

        glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week02");

    glutDisplayFunc(display);

    glutMainLoop();

    }

就會出現兩個茶壺 真的是太神奇了。0.0

STEP02-2

再再把程式碼修改一下

#include <GL/glut.h>

void display()

{

    glColor3f(0,1,0);///綠色

    glBegin(GL_POLYGON);

    glVertex2f(0,1);///上面

    glVertex2f(-1,-1);///左下角

    glVertex2f(+1,-1);///右下角

    glEnd();

     glColor3f(1,1,0);

    glutSolidTeapot(0.3);

        glutSwapBuffers();

}

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

    {

        glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week02");

    glutDisplayFunc(display);

    glutMainLoop();

    }

就會出現綠色三角背景的黃色茶壺。ouo

STEP02-3

再再再把程式碼修改一下

#include <GL/glut.h>

void display()

{

    glColor3f(0,1,0);

    glBegin(GL_POLYGON);

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

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

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

    glEnd();

     glColor3f(1,1,0);

    glutSolidTeapot(0.3);

        glutSwapBuffers();

}

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

    {

        glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week02");

    glutDisplayFunc(display);

    glutMainLoop();

    }

這樣你就是9ay可以得到彩色的三角形。

STEP02-4

再再再再把程式碼修改很多

#include <GL/glut.h>

#include <math.h>

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

{

    glBegin(GL_POLYGON);

    for(float a=0; a<2*3.141592; a+=0.01)

    {

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

    }

    glEnd();

}

void display()

{

    glColor3f(233/255.0,141/255.0,128/255.0);

    mycircle(0.5,0,0);

    glColor3f(1,1,0);

     mycircle(0.3,0.5,0.5);

    glColor3f(1,0,0);

     mycircle(0.3,-0.5,0.5);

     glColor3f(0,1,0);

     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("week02");

    glutDisplayFunc(display);

    glutMainLoop();

    }

這樣竟然就可以得出圓形!!!!!!!!!!!!!!太神奇了!!!!!!!!!!!!!!!!

說不定改一下就可以做出奧運了

做出來了彩色正

程式碼:

#include <GL/glut.h>

void display()

{

    glColor3f(0,246/255.0,0);

    glBegin(GL_POLYGON);

    glVertex2f((52-100)/100.0,-(35-100)/100.0);

    glVertex2f((135-100)/100.0,-(15-100)/100.0);

    glVertex2f((147-100)/100.0,-(27-100)/100.0);

    glVertex2f((55-100)/100.0,-(46-100)/100.0);

    glEnd();

     glColor3f(0,64/255.0,128/255.0);

    glBegin(GL_POLYGON);

    glVertex2f((111-100)/100.0,-(35-100)/100.0);

    glVertex2f((108-100)/100.0,-(176-100)/100.0);

    glVertex2f((96-100)/100.0,-(176-100)/100.0);

    glVertex2f((90-100)/100.0,-(42-100)/100.0);

    glEnd();

     glColor3f(255/255.0,128/255.0,128/255.0);

    glBegin(GL_POLYGON);

    glVertex2f((107-100)/100.0,-(106-100)/100.0);

    glVertex2f((144-100)/100.0,-(92-100)/100.0);

    glVertex2f((157-100)/100.0,-(102-100)/100.0);

    glVertex2f((110-100)/100.0,-(115-100)/100.0);

    glEnd();

     glColor3f(255/255.0,128/255.0,0);

    glBegin(GL_POLYGON);

    glVertex2f((172-100)/100.0,-(165-100)/100.0);

    glVertex2f((191-100)/100.0,-(181-100)/100.0);

    glVertex2f((27-100)/100.0,-(199-100)/100.0);

    glVertex2f((9-100)/100.0,-(189-100)/100.0);

    glEnd();

     glColor3f(252/255.0,208/255.0,3/255.0);

    glBegin(GL_POLYGON);

    glVertex2f((53-100)/100.0,-(91-100)/100.0);

    glVertex2f((67-100)/100.0,-(96-100)/100.0);

    glVertex2f((66-100)/100.0,-(181-100)/100.0);

    glVertex2f((57-100)/100.0,-(182-100)/100.0);

    glEnd();

        glutSwapBuffers();

}

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

    {

        glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week02");

    glutDisplayFunc(display);

    glutMainLoop();

    }