91 week02

 開 freeglut 壓縮檔再拉到桌面

\freeglut\lib裡libfreeglut.a複製成libglut32.a

開code blocks 選glut專案 名稱: week01-2_GLUT 把目錄改設成桌面的freeglut

最後執行

左邊Sources->main.cpp開啟

貼上:

#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();

}

執行結果:

第二個程式:

插入程式:

    glColor3f(1,1,0);//黃色

    glutSolidTeapot( 0.5 );//大茶壺

    glColor3f(0,1,0);//綠色

    glutSolidTeapot( 0.3 );//小茶壺

結果:

第二節課第一程式:

上個程式修改:

glColor3f(0,1,0);

    glBegin(GL_POLYGON);

        glVertex2f(0,1);//頂點

        glVertex2f(-1,-1);//頂點

        glVertex2f(+1,-1);//頂點

    glEnd();

    glColor3f(1,1,0);

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

結果:

第二堂第二程式:

修改並增加程式碼:

glBegin(GL_POLYGON);

         glColor3f(1,0,0); 顏色 glVertex2f(0,1);

         glColor3f(0,1,0); 顏色 glVertex2f(-1,-1);

         glColor3f(0,0,1); 顏色 glVertex2f(+1,-1);

    glEnd();

    glColor3f(1,1,0);

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

結果:

week02-3:

多邊形:

#include <GL/glut.h>

void display()

{

    glBegin(GL_POLYGON);

    glVertex2f((216-100)/100.0,-(13-100)/100.0);

    glVertex2f((144-100)/100.0,-(128-100)/100.0);

    glVertex2f((9-100)/100.0,-(157-100)/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();

}

增加色彩:

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

    glBegin(GL_POLYGON);

    glVertex2f((216-100)/100.0,-(13-100)/100.0);

    glVertex2f((144-100)/100.0,-(128-100)/100.0);

    glVertex2f((9-100)/100.0,-(157-100)/100.0);

    glEnd();

    glutSwapBuffers();

week02-4:

修改程式(五圓圖):

#include <GL/glut.h>

#include <math.h>

void cir(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);

    cir(0.5,0,0);

    glColor3f(1,1,0);

    cir(0.3,0.5,0.5);

    glColor3f(1,0,0);

    cir(0.3,-0.5,0.5);

    glColor3f(0,1,0);

    cir(0.3,-0.5,-0.5);

    glColor3f(0,0,1);

    cir(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();

}

結果: