juskii 電腦圖學Week04

 1.從上課軟體下載freeglut

 2.將壓縮檔解壓到桌面

3.點開freeglut後復製其連結

4.點開lib後將freeglut.a復製

5.改名為libglut32.a (124KB)

6.到codeblock開新的專案 file > project,(當名為week03_mouse_glScalef)

7.將上週的10行程式貼到這次的(

#include <GL/glut.h>

void display()

{

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week03_mouse");

    glutDisplayFunc(display);

    glutMainLoop();

}

)

8.寫兩行一個清背景一個讓背景(glClearColor(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);)變淡黃色(glClear(1.0,1.0,0.9,1.0);)

9.將上週的旋轉程式碼貼上

void motion(int x , int y)

{

    angle = x;

    display();

}

glPushMatrix();///49

        ///glTranslatef(teapotX,teapotY,0);

        glRotated(angle ,0,0,1);

        glutSolidTeapot(0.3);

    glPopMatrix();///54

10.加可以縮放茶壺的程式碼 (glScalef(s,s,s);)

11.到codeblock開新的專案 file > project,(當名為week04_keyboard_mouse_motion)

12.將上週的10行程式貼到這次的(

#include <GL/glut.h>

void display()

{

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week03_mouse");

    glutDisplayFunc(display);

    glutMainLoop();

}

)

13.加上這兩行glClearColor(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glutKeyboardFunc(keyboard);

14.加上一個鍵盤函式可以顯示鍵盤英文和座標的程式碼\

void keyboard(unsigned char key ,int x, int y)

{

    printf("key: %c x: %d y: %d\n",key,x,y);

}

glutKeyboardFunc(keyboard);

15.加兩個函式一個滑鼠一個座標

void mouse(int button,int state, int x,int y)

{

    oldX=x;

}

void motion(int x,int y)

{

    angle += (x-oldX);

    oldX = x;

    display();

}

 glutMouseFunc(mouse);

    glutMotionFunc(motion);

16.讓茶壺轉起來

glPushMatrix();

        glRotatef(angle ,0,0,1);

        glutSolidTeapot(0.3);

    glPopMatrix();(圖片沒加到這行，要補上)

17.到老師的網站(https://jsyeh.org/3dcg10/)

 18.下載data,win32

19.解壓縮data.zip,window.zip

20.將data資料夾丟到window裡面(解壓後的檔案)

21.點開Transformation.exe

ps:老師的範例

22.到codeblock開新的專案 file > project,(當名為week04_translate_rotate_scale

23.將剛剛的程式貼到這次的(

#include <GL/glut.h>

#include <stdio.h>

float angle =0, oldX=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle ,0,0,1);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void mouse(int button,int state, int x,int y)

{

    oldX=x;

}

void motion(int x,int y)

{

    angle += (x-oldX);

    oldX = x;

    display();

}

void keyboard(unsigned char key ,int x, int y)

{

    printf("key: %c x: %d y: %d\n",key,x,y);

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week04_keyboard_mouse_motion");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}

24.刪掉一些程式碼

25.多增加這行 glutIdleFunc(display);還有(angle++),可以讓茶壺自動轉

26.這三行讓茶壺變小且座標往右並且自轉

glTranslated(0.8,0,0);

        glRotatef(angle++ ,0,0,1);

        glScalef(0.3,0.3,0.3);

27.將背景和茶壺改色glClearColor(1.0,1.0,0.9,1.0);,glColor3f(0,1,0);

28.到codeblock開新的專案 file > project,(當名為week04_rotate_translate_scale

29.將剛剛的程式碼貼上並下面兩行交換位置

glTranslated(0.8,0,0);

glRotatef(angle++ ,0,0,1);

30.上傳github