xyt week13

 week13

1.畫出白色長方形

```c

#include <GL/glut.h>
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glRectf(0.5, 0.5, -0.5, -0.5);
    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutInitWindowSize(600, 600);
    glutCreateWindow("week12 TRT");
    glutDisplayFunc( display );
    glutMainLoop();
    return 0;

}

 ```

2.畫出身體、手臂，調整位置

```c
#include <GL/glut.h>
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glColor3f(1, 1, 1);
    glRectf(0.5, 0.5, -0.5, -0.5);///身體
    glPushMatrix();
        ///glTranslatef(x, y, z);
        ///glRotatef(angle, 0, 0, 1);
        ///glTranslatef(x2, y2, z3);
        glColor3f(1, 0, 0);
        glRectf(0.5, 0.5, 1.0, 0.3);///手臂
    glPopMatrix();
    glutSwapBuffers();
}

int main(int argc, char**argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutInitWindowSize(600, 600);
    glutCreateWindow("week13 rect TRT");

    glutDisplayFunc( display );
    glutMainLoop();
    return 0;
}

```

3.移動紅色方塊位置到正中心

```c
#include <GL/glut.h>
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glColor3f(1, 1, 1);
    glRectf(0.5, 0.5, -0.5, -0.5);///身體
    glPushMatrix();
        ///glTranslatef(x, y, z);
        glRotatef(45, 0, 0, 1);
        glTranslatef(-0.5, -0.4, 0);
        glColor3f(1, 0, 0);
        glRectf(0.5, 0.5, 1.0, 0.3);///手臂
    glPopMatrix();
    glutSwapBuffers();
}

int main(int argc, char**argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutInitWindowSize(600, 600);
    glutCreateWindow("week13 rect TRT");

    glutDisplayFunc( display );
    glutMainLoop();
    return 0;
}

```

4.加入滑鼠事件讓紅色方塊跟著滑鼠移動旋轉

```c
#include <GL/glut.h>
float angle=45, oldX=0;
void mouse(int button, int state, int x, int y){
    oldX = x;
}
void motion(int x, int y){
    angle += (x-oldX);
    oldX = x;
    glutPostRedisplay();
}
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glColor3f(1, 1, 1);
    glRectf(0.5, 0.5, -0.5, -0.5);///身體
    glPushMatrix();
        glTranslatef(0.5, 0.5, 0);
        glRotatef(angle, 0, 0, 1);
        glTranslatef(-0.5, -0.4, 0);
        glColor3f(1, 0, 0);
        glRectf(0.5, 0.5, 1.0, 0.3);///手臂
    glPopMatrix();
    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutInitWindowSize(600, 600);
    glutCreateWindow("week13 rect TRT");
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutDisplayFunc( display );
    glutMainLoop();
    return 0;
}
```

5.新增一個新的專案 week13_rect_TRT_TRT

將數值改小讓白熱長方形瘦身，並將紅色方塊移動到正確位置

```c
#include <GL/glut.h>
float angle=45, oldX=0;
void mouse(int button, int state, int x, int y){
    oldX = x;
}
void motion(int x, int y){
    angle += (x-oldX);
    oldX = x;
    glutPostRedisplay();
}
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glColor3f(1, 1, 1);
    glRectf(0.3, 0.5, -0.3, -0.5);///身體
    glPushMatrix();
        glTranslatef(0.3, 0.5, 0);
        glRotatef(angle, 0, 0, 1);
        glTranslatef(-0.5, -0.4, 0);
        glColor3f(1, 0, 0);
        glRectf(0.5, 0.5, 1.0, 0.3);///手臂
    glPopMatrix();
    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutInitWindowSize(600, 600);
    glutCreateWindow("week13 rect TRT");
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutDisplayFunc( display );
    glutMainLoop();
    return 0;
}

```

6.新增下手肘

```c

#include <GL/glut.h>
float angle=45, oldX=0;
void mouse(int button, int state, int x, int y){
    oldX = x;
}
void motion(int x, int y){
    angle += (x-oldX);
    oldX = x;
    glutPostRedisplay();
}
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glColor3f(1, 1, 1);///白色
    glRectf(0.3, 0.5, -0.3, -0.2);///身體，瘦身
    glPushMatrix();///掛的位置改變了
        glTranslatef(0.3, 0.5, 0);
        glRotatef(angle, 0, 0, 1);
        glTranslatef(-0.3, -0.4, 0);
        glColor3f(1, 0, 0);
        glRectf(0.3, 0.5, 0.8, 0.3);///上手臂
        glPushMatrix();
            ///(3) 把下手肘掛在關節上
            ///(2) 旋轉
            glColor3f(0, 1, 0);///綠色的 (1) 把下手肘的旋轉中心放正中心
            glRectf(0.8, 0.5, 1.1, 0.3);/// 再畫下手肘
        glPopMatrix();
    glPopMatrix();
    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutInitWindowSize(600, 600);
    glutCreateWindow("week13 rect TRT");
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutDisplayFunc( display );
    glutMainLoop();
    return 0;
}

```

7.將angle數值改0 (起始值變水平)，做出下手肘

```c

#include <GL/glut.h>

float angle=0, oldX=0;

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

    oldX = x;

}

void motion(int x, int y){

    angle += (x-oldX);

    oldX = x;

    glutPostRedisplay();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glColor3f(1, 1, 1);///白色

    glRectf(0.3, 0.5, -0.3, -0.2);///身體，瘦身

    glPushMatrix();///掛的位置改變了

        glTranslatef(0.3, 0.5, 0);

        glRotatef(angle, 0, 0, 1);

        glTranslatef(-0.3, -0.4, 0);

        glColor3f(1, 0, 0);

        glRectf(0.3, 0.5, 0.8, 0.3);///上手臂

        glPushMatrix();

            glTranslatef(0.8, 0.4, 0);///(3) 把下手肘掛在關節上

            glRotatef(angle, 0, 0 ,1);///(2) 旋轉

            glTranslatef(-0.8, -0.4, 0);///(1) 把下手肘的旋轉中心放正中心

            glColor3f(0, 1, 0);///綠色的

            glRectf(0.8, 0.5, 1.1, 0.3);/// 再畫下手肘

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc, char**argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutInitWindowSize(600, 600);

    glutCreateWindow("week13 rect TRT");

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc( display );

    glutMainLoop();

    return 0;

}

```

8.新增左右顛倒的第二隻手

```c
#include <GL/glut.h>
float angle=0, oldX=0;
void mouse(int button, int state, int x, int y){
    oldX = x;
}
void motion(int x, int y){

    angle += (x-oldX);

    oldX = x;

    glutPostRedisplay();
}
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glColor3f(1, 1, 1);///白色
    glRectf(0.3, 0.5, -0.3, -0.2);///身體，瘦身
    glPushMatrix();///掛的位置改變了
        glTranslatef(0.3, 0.5, 0);
        glRotatef(angle, 0, 0, 1);
        glTranslatef(-0.3, -0.4, 0);
        glColor3f(1, 0, 0);
        glRectf(0.3, 0.5, 0.8, 0.3);///上手臂
        glPushMatrix();
            glTranslatef(0.8, 0.4, 0);///(3) 把下手肘掛在關節上
            glRotatef(angle, 0, 0 ,1);///(2) 旋轉
            glTranslatef(-0.8, -0.4, 0);///(1) 把下手肘的旋轉中心放正中心
            glColor3f(0, 1, 0);///綠色的
            glRectf(0.8, 0.5, 1.1, 0.3);/// 再畫下手肘
        glPopMatrix();
    glPopMatrix();

    glPushMatrix();///左半邊
        glTranslatef(-0.3, 0.5, 0);
        glRotatef(angle, 0, 0, 1);
        glTranslatef(+0.3, -0.4, 0);
        glColor3f(1, 0, 0);
        glRectf(-0.3, 0.5, -0.8, 0.3);///上手臂
        glPushMatrix();
            glTranslatef(-0.8, 0.4, 0);///(3) 把下手肘掛在關節上
            glRotatef(angle, 0, 0 ,1);///(2) 旋轉
            glTranslatef(+0.8, -0.4, 0);///(1) 把下手肘的旋轉中心放正中心
            glColor3f(0, 1, 0);///綠色的
            glRectf(-0.8, 0.5, -1.1, 0.3);/// 再畫下手肘
        glPopMatrix();
    glPopMatrix();

    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutInitWindowSize(600, 600);
    glutCreateWindow("week13 rect TRT");
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutDisplayFunc( display );
    glutMainLoop();
    return 0;
}
```

9.加入鍵盤事件使關節分開

```c
#include <GL/glut.h>
float angle[20], oldX=0;
int angleID=0;
void keyboard( unsigned char key, int x, int y){
    if( key=='0' ) angleID=0;
    if( key=='1' ) angleID=1;
    if( key=='2' ) angleID=2;
    if( key=='3' ) angleID=3;
}///用keyboard的按鍵來決定
void mouse(int button, int state, int x, int y){
    oldX = x;
}
void motion(int x, int y){
    angle[angleID] += (x-oldX);
    oldX = x;
    glutPostRedisplay();
}
void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glColor3f(1, 1, 1);///白色
    glRectf(0.3, 0.5, -0.3, -0.2);///身體，瘦身
    glPushMatrix();///掛的位置改變了
        glTranslatef(0.3, 0.5, 0);
        glRotatef(angle[0], 0, 0, 1);
        glTranslatef(-0.3, -0.4, 0);
        glColor3f(1, 0, 0);
        glRectf(0.3, 0.5, 0.8, 0.3);///上手臂
        glPushMatrix();
            glTranslatef(0.8, 0.4, 0);///(3) 把下手肘掛在關節上
            glRotatef(angle[1], 0, 0 ,1);///(2) 旋轉
            glTranslatef(-0.8, -0.4, 0);///(1) 把下手肘的旋轉中心放正中心
            glColor3f(0, 1, 0);///綠色的
            glRectf(0.8, 0.5, 1.1, 0.3);/// 再畫下手肘
        glPopMatrix();
    glPopMatrix();

    glPushMatrix();///左半邊
        glTranslatef(-0.3, 0.5, 0);
        glRotatef(angle[2], 0, 0, 1);
        glTranslatef(+0.3, -0.4, 0);
        glColor3f(1, 0, 0);
        glRectf(-0.3, 0.5, -0.8, 0.3);///上手臂
        glPushMatrix();
            glTranslatef(-0.8, 0.4, 0);///(3) 把下手肘掛在關節上
            glRotatef(angle[3], 0, 0 ,1);///(2) 旋轉
            glTranslatef(+0.8, -0.4, 0);///(1) 把下手肘的旋轉中心放正中心
            glColor3f(0, 1, 0);///綠色的
            glRectf(-0.8, 0.5, -1.1, 0.3);/// 再畫下手肘
        glPopMatrix();
    glPopMatrix();

    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutInitWindowSize(600, 600);
    glutCreateWindow("week13 rect TRT");
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutKeyboardFunc(keyboard);
    glutDisplayFunc( display );
    glutMainLoop();
    return 0;
}

```