一定是大拇指的啦

  step 0 :下載模型

0.0  jsyeh.org/3dcg10 下載  data.zip  , windows.zip

0.1 data.zip =>下載/windows/data

     windows.zip => 下載/windows/Transformation.exe

step 1 : 鍵盤點出位置

1.1開新專案 命名為week05_keyboard

1.2使用keyboardFunc函式 , 按鍵盤可以在小黑視窗顯示滑鼠所在位置及按鍵盤的字母

1.3貼上程式碼

#include <GL/glut.h>

#include <stdio.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glColor3f(1,1,0);

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

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

{

    printf("你按下了 %c 在 %d %d座標\n",key , x, y);

}

int main(int argc , char**argv)

{

    glutInit(&argc ,argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week05 keyboard");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}

step 2 : keyboard + mouse + motion 

2.1 接續week05_keyboard , 開新專案 week05_keyboard_mouse_motion

2.2接續上個程式碼 , 新增mouse , motion 函式

2.3貼上程式碼

#include <GL/glut.h>

#include <stdio.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glColor3f(1,1,0);

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

void keyboard(  unsigned char key , int mouseX ,int mouseY )

{  

}

void mouse (int button , int state , int mouseX , int mouseY)

{  

}

void motion (int mouseX ,int mouseY)

{   

}

int main(int argc , char**argv)

{

    glutInit(&argc ,argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week05 keyboard");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutMouseFunc(mouse);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}

2.4 新增motion函式內容

#include <GL/glut.h>

#include <stdio.h>

float x=0 , y=0 , z=0 ;///設定初始值

float oldX=0 , oldY=0;///設定初始值

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef( (x-150)/150.0, -(y-150)/150.0, z);

        glColor3f(1,1,0);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

void keyboard( unsigned char key , int mouseX ,int mouseY)

{

}

void mouse(int button , int state , int mouseX , int mouseY)

{

}

void motion (int mouseX ,int mouseY)

{

    x+=(mouseX-oldX);  y+=(mouseY-oldY);

    oldX=mouseX;            oldY=mouseY;

    display();

}

int main(int argc , char**argv)

{

    glutInit(&argc ,argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week05 keyboard");

    glutDisplayFunc(display);

    glutMotionFunc(motion); ///motion用

    glutMouseFunc(mouse); ///mouse用

    glutKeyboardFunc(keyboard); keyboard用

    glutMainLoop();

}

2.5新增mouse函式 、 更改背景顏色 、 圖案放正中間

#include <GL/glut.h>

#include <stdio.h>

float x=150 , y=150 , z=0 ; ///圖案置中

float oldX=0 , oldY=0;

void display()

{

    glClearColor(0.5,0.5,0.5,1);///更改背景色

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef( (x-150)/150.0, -(y-150)/150.0, z);

        glColor3f(1,1,0);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

void keyboard( unsigned char key , int mouseX ,int mouseY)

{

}

void mouse(int button , int state , int mouseX , int mouseY)

{

    oldX=mouseX;

    oldY=mouseY;

}

void motion (int mouseX ,int mouseY)

{

    x+=(mouseX-oldX);  y+=(mouseY-oldY);

    oldX=mouseX;            oldY=mouseY;

    display();

}

int main(int argc , char**argv)

{

    glutInit(&argc ,argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week05 keyboard");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutMouseFunc(mouse);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}

2.5 新增scale 縮放函式

#include <GL/glut.h>

#include <stdio.h>

float x=150 , y=150 , z=0 ,scale=1.0;///原比例為1

float oldX=0 , oldY=0;

void display()

{

    glClearColor(0.5,0.5,0.5,1);

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef( (x-150)/150.0, -(y-150)/150.0, z);

        glScalef(scale , scale , scale);///x, y, z 等比例放大

        glColor3f(1,1,0);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

void keyboard( unsigned char key , int mouseX ,int mouseY)

{

}

void mouse(int button , int state , int mouseX , int mouseY)

{

    oldX=mouseX;

    oldY=mouseY;

}

void motion (int mouseX ,int mouseY)

{

    if ( mouseX-oldX > 0 ) scale *= 1.01; ///滑鼠往右放大1.01倍

    if ( mouseX-oldX < 0 ) scale *= 0.99;///滑鼠往左縮小0.99倍

   // x+=(mouseX-oldX);  y+=(mouseY-oldY); 先註解不用

    oldX=mouseX;            oldY=mouseY;

    display();

}

int main(int argc , char**argv)

{

    glutInit(&argc ,argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week05 keyboard");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutMouseFunc(mouse);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}