Week09

今天上課內容:

1.一如往常地把GLUT打開，老師教了glutSolidSphere的用法。



2.進入課程寫程式，做出一個白色正方型。



#include <GL/glut.h>
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glutSolidCube(1);
    glutSwapBuffers();

}
int main (int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GL_DOUBLE| GL_DEPTH);
glutCreateWindow("weeK09");

glutDisplayFunc(display);
glutMainLoop();
}

3.變成紅色正方形!!


    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glColor3f(1,0,0);  //加入顏色程式
    glutSolidCube(1);
    glutSwapBuffers();

4.做長方形



#include <GL/glut.h>
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();  ///備份矩陣
        glColor3f(1,0,0); ///顏色
        glScalef(0.5,0.2,0.2); ///縮放
        glutSolidCube(1);
    glPopMatrix(); ///還原矩陣

    glutSwapBuffers();
}
int main (int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE| GLUT_DEPTH);
glutCreateWindow("weeK09");

glutDisplayFunc(display);
glutMainLoop();
}

----------------------------------------------------------------------------------------------------------------

#include <GL/glut.h>

void myCube()  ///用自己的函式簡化

{

    glPushMatrix();

        glColor3f(1,0,0);

        glScalef(0.5,0.2,0.2);     ////下面移上去

        glutSolidCube(1);

    glPopMatrix();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    myCube();///用自己的函式簡化

    myCube();///方塊黏在一起了!!

    glutSwapBuffers();

}

int main (int argc, char**argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE| GLUT_DEPTH);

glutCreateWindow("weeK09");

glutDisplayFunc(display);

glutMainLoop();

}

5.方塊重疊

#include <GL/glut.h>

void myCube() ///簡化程式

{

    glPushMatrix();

        glScalef(0.5,0.2,0.2); ////調大小要放在Push/Pop裡面

        glutSolidCube(1);

    glPopMatrix();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix(); ////保護

        glColor3f(1,0,0);

        myCube();

        glTranslatef(0.4,0.1,0);

        glColor3f(1,1,0); ///加個黃色

        myCube();

    glPopMatrix();  ///保護

    glutSwapBuffers();

}

int main (int argc, char**argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE| GLUT_DEPTH);

glutCreateWindow("weeK09");

glutDisplayFunc(display);

glutMainLoop();

}

6.方塊旋轉




#include <GL/glut.h>
void myCube()
{
    glPushMatrix();
        glColor3f(1,0,0);
        glScalef(0.5,0.2,0.2);
        glutSolidCube(1);
    glPopMatrix();
}
float angle=0;  ///轉動變數 (角度)
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();
        glRotatef(angle,0,0,1);  ///每一次的增加角度
        myCube();
    glPopMatrix();
    angle++;    ///增加角度
    glutSwapBuffers();
}
int main (int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE| GLUT_DEPTH);
glutCreateWindow("week09");
glutIdleFunc(display);  ///一定要記得打!!!!有空idle，在重畫畫面
glutDisplayFunc(display);
glutMainLoop();
}

7.做一個中心體再旋轉(用綠色方體作範例)


#include <GL/glut.h>
void myCube()
{
    glPushMatrix();
        glColor3f(1,0,0);
        glScalef(0.5,0.2,0.2);
        glutSolidCube(1);
    glPopMatrix();
}
float angle=0;
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glColor3f(0,1,0);
    glutSolidCube(0.6);
    glPushMatrix();
        glTranslatef(0.3,0.3,0);  ///把下面(旋轉中)的手臂，掛到右上角
        glRotatef(angle,0,0,1);
        glTranslatef(0.22,0,0);
////把要轉動的中心點，放到畫面的中心
        myCube();
    glPopMatrix();
    angle++;
    glutSwapBuffers();
}
int main (int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE| GLUT_DEPTH);
glutCreateWindow("week09");
glutIdleFunc(display);
glutDisplayFunc(display);
glutMainLoop();
}