痾week02 點線面色彩

 week02-1

複製week01-2的一部分main.cpp再加一些程式

程式如下:

#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();

}

week02-2

增加顏色和大小變化順便也更改標題:

#include <GL/glut.h>

void display()

{

     glColor3f(1,1,0);///黃色

    glutSolidTeapot(0.5);///大茶壺

    glColor3f(0,1,0);///綠色

        glutSolidTeapot(0.3);///小茶壺

        glutSwapBuffers();

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week02");

  glutDisplayFunc(display);

 glutMainLoop();

}

week02-3

從week02-2的程式再加第三個程式

#include <GL/glut.h>

void display()

{

     glColor3f(0,1,0);///綠色

   glBegin(GL_POLYGON);

        glVertex2f(0,1);

        glVertex2f(-1,-1);

        glVertex2f(1,-1);

    glEnd();

    glColor3f(1,1,0);///黃色

        glutSolidTeapot(0.3);///小茶壺

        glutSwapBuffers();

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week02");

  glutDisplayFunc(display);

 glutMainLoop();

}

week02-4

由week02-3延伸，讓3個頂點顏色改變

#include <GL/glut.h>

void display()

{

     ///glColor3f(0,1,0);///綠色

   glBegin(GL_POLYGON);

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

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

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

    glEnd();

    glColor3f(1,1,0);///黃色

        glutSolidTeapot(0.3);///小茶壺

        glutSwapBuffers();

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week02");

  glutDisplayFunc(display);

 glutMainLoop();

}

week02-5

練習回家作業範例:

#include <GL/glut.h>

void display()

{

     ///glColor3f(0,1,0);///綠色

   glBegin(GL_POLYGON);

       glVertex2f((65-100)/100.0,-(54-100)/100.0);

       glVertex2f((34-100)/100.0,-(138-100)/100.0);

       glVertex2f((59-100)/100.0,-(138-100)/100.0);

       glVertex2f((87-100)/100.0,-(53-100)/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();

}

 

week02-6

延伸week02-5 字體改顏色:

#include <GL/glut.h>

void display()

{

     glColor3f(234/255.0,140/255.0,130/255.0);

   glBegin(GL_POLYGON);

       glVertex2f((61-100)/100.0,-(34-100)/100.0);

       glVertex2f((22-100)/100.0,-(113-100)/100.0);

       glVertex2f((73-100)/100.0,-(41-100)/100.0);

       glVertex2f((71-100)/100.0,-(47-100)/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();

}

week02-7

最後一個圓形練習

程式如下:#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+=0.1){

        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();

}