Fafa的奇妙冒險

Week06

Week 06-1.1

Step 1：先開啟CodeBlock並開啟OpenGL project

Step 2：複製上周的程式碼

程式碼：

#include<GL/glut.h>

float angle = 0;

void myCube()

{

    glPushMatrix();

    glScalef(0.5,0.2,0.2);

    glutSolidCube(1);

    glPopMatrix();

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(1,1,1);

    glutSolidCube(1);

    glPushMatrix();

        glTranslatef(0.5,0.5,0);

        glRotatef(angle,0,0,1); 

        glTranslatef(0.25,0,0); 

        glColor3f(0,1,0);

        myCube();

    glPopMatrix();

    glPushMatrix();

        glTranslatef(-0.5,0.5,0);

        glRotatef(angle,0,0,1);

        glTranslatef(0.25,0,0);

        glColor3f(0,1,0);

    glPopMatrix();

    glutSwapBuffers();

    angle++;

}

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

{

    glutInit(&argc , argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE |GL_DEPTH);

    glutCreateWindow("week05");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMainLoop();

}

Step 3：把display()改畫茶壺

display()的新程式碼：void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidSphere(0.01, 30, 30);

    glPushMatrix();

        glRotatef(angle, 0, 0, 1);

        glTranslatef(0.45, 0, 0);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    

    glutSwapBuffers();

    angle++;

}

Step 4：觀察圖形轉動，完成！

Week 06-2.1

Step 1：先開啟CodeBlock並import OpenGL project

Step 2：複製上面的程式碼

Step 3：將display()的程式碼修改為：

display():

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

            glutSolidSphere(0.01,30,30);

glPushMatrix();

glTranslatef(0.5,0.5,0);

glRotatef(angle,0,0,1);

glTranslatef(0.45,0,0);

glutSolidTeapot(0.3);

glPopMatrix();

        glutSwapBuffers();

angle++;

}

Step 4：觀察圖案變化，可發現圖案往右上偏移

Week 06-2.2

Step 1：開啟新的GLUT project

Step 2：複製下列的程式碼：

程式碼：

#include <GL/glut.h>

float angle = 0;

void mycube()

{

    glPushMatrix();

    glScalef(1,0.3,0.3);

    glutSolidCube(0.5);

    glPopMatrix();

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

            glutSolidSphere(0.01,30,30);

glPushMatrix();

glRotatef(angle,0,0,1);

glTranslatef(0.25,0,0);

mycube();

glPopMatrix();

        glutSwapBuffers();

angle++;

}

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

    {

        glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week06");

    glutDisplayFunc(display);

glutIdleFunc(display);

    glutMainLoop();

    }

Step 3：出現矩形，矩形逆時鐘旋轉

Week 06-3

Week06-3.1

Step 1：再開啟一個GLUT project

Step 2：複製進下列的程式碼

程式碼：

#include <GL/glut.h>

float angle = 0;

void mycube()

{

    glPushMatrix();

    glScalef(1,0.3,0.3);

    glutSolidCube(0.5);

    glPopMatrix();

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

            glutSolidSphere(0.01,30,30);

glPushMatrix();

        glTranslatef(0.25,0,0);

glRotatef(angle,0,0,1);

glTranslatef(0.25,0,0);

mycube();

glPushMatrix();

        glTranslatef(0.25,0,0);

glRotatef(angle,0,0,1);

glTranslatef(0.25,0,0);

mycube();

glPopMatrix();

glPopMatrix();

        glutSwapBuffers();

angle++;

}

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

    {

        glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week06");

    glutDisplayFunc(display);

glutIdleFunc(display);

    glutMainLoop();

    }

Step 3：圖形多了一個矩形

Week 06-3.2

Step 1：再開啟一個GLUT project

Step 2：複製下列程式碼進GLUT project

程式碼：

#include <GL/glut.h>

float angle = 0;

void mycube()

{

    glPushMatrix();

    glScalef(1,0.3,0.3);

    glutSolidCube(0.5);

    glPopMatrix();

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

            glutSolidSphere(0.01,30,30);

glPushMatrix();

        glTranslatef(0.25,0,0);

glRotatef(angle,0,0,1);

glTranslatef(0.25,0,0);

mycube();

glPushMatrix();

        glTranslatef(0.25,0,0);

glRotatef(angle,0,0,1);

glTranslatef(0.25,0,0);

mycube();

glPopMatrix();

glPopMatrix();

glPushMatrix();

        glTranslatef(-0.25,0,0);

glRotatef(angle,0,0,1);

glTranslatef(-0.25,0,0);

mycube();

glPushMatrix();

        glTranslatef(-0.25,0,0);

glRotatef(angle,0,0,1);

glTranslatef(-0.25,0,0);

mycube();

glPopMatrix();

glPopMatrix();

        glutSwapBuffers();

angle++;

}

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

    {

        glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week06");

    glutDisplayFunc(display);

glutIdleFunc(display);

    glutMainLoop();

    }

Step 3：可發現圖形變為4個矩形

這次主要是在display新增幾個程式碼：

先用glTranslatef(); 更改位置

再用 glRotatef(); 更改選轉角度

再用 myCube()創建一個矩形