T week02

1.

開codeblock-file-new-project-GLUT project

...選桌面 檔案名稱week02_GLUT_first

將上課用軟體freeglut複製至桌面

進lib 複製libfreeglut_static.a 重新命名libglut32.a

glut location選擇freeglut

點選左上Sources-main.cpp 複製程式碼

#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();

}

將原先100多行程式碼刪掉 貼上新的程式碼

執行出現小黑窗跟茶壺就完成了

2.

打程式碼

    glColor3f(0,1,0);

    glutSolidTeapot( 0.5 ); ///會出現大綠茶壺

    

    glColor3f(1,1,0);///小茶壺會變黃色

執行出現大綠茶壺和小黃茶壺

打程式碼

    glBegin(GL_POLYGON);

        glVertex2d( 0, 1);

        glVertex2d(-1,-1);

        glVertex2d(+1,-1);

    glEnd();

執行出現綠三角形

打程式碼

        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

執行出現三色三角形

程式碼

#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();

}

執行出現黃白視窗

3.

程式碼

#include <GL/glut.h>

#include <math.h>

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

{

    glBegin(GL_POLYGON);

    for(float a = 0; a< 2*3.14159; 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();

}

執行出現球體