阿奕學圖學 week03

 #week03

##mouse 滑鼠

1.桌面[葉正聖老師上課用] freeglut 拉到桌面 把lib-libfreeglut.a複製成libglut32.a

2.開GLUT week03_mouse

3.十行程式貼上

4.改完後

#include <GL/glut.h>

#include <stdio.h>///為了printf()

void display()

{

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{///定義mouse函數 button:0左鍵 1中鍵 2右鍵

    printf("%d %d %d %d\n",button,state,x,y);

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week03 mouse");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);///設定mouse函式

    glutMainLoop();

}

#移動 glTranslatef(x,y,z)

1.https://jsyeh.org/3dcg10/

2.下載data.zip 跟windows.zip

3.解壓縮後把 data拉進windows下

##week03

float teapotX =0,teapotY =0;///新加的程式用來放茶壺的座標

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);///清背景

    glPushMatrix();///備份矩陣

        glTranslatef(teapotX,teapotY,0);///把座標移動

        glutSolidTeapot(0.3);

    glPopMatrix();///還原矩陣

    glutSwapBuffers();

#旋轉

glRotatef(轉動角度,x,y,z)

1.右手定則 Z軸從畫面破出來

#include <GL/glut.h>

#include <stdio.h>///為了printf()

float teapotX =0,teapotY =0;///新加的程式用來放茶壺的座標

float angle = 0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);///清背景

    glPushMatrix();///備份矩陣

        ///glTranslatef(teapotX,teapotY,0);///把座標移動

        glRotatef(angle,0,0,1);///最難的Z軸

        glutSolidTeapot(0.3);

    glPopMatrix();///還原矩陣

    glutSwapBuffers();

}                   ///state:0 :下去 1:上來

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

{///做巧妙的修正

    teapotX = (x-150/150.0);

    teapotY = -(y-150/150.0);

}

void motion(int x,int y)

{

    angle = x;

    display();

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week03 mouse");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);///設定mouse的motion動作

    glutMainLoop();

}

###縮放

#include <GL/glut.h>

#include <stdio.h>///為了printf()

float teapotX =0,teapotY =0;///新加的程式用來放茶壺的座標

float angle = 0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);///清背景

    glPushMatrix();///備份矩陣

        glTranslatef(teapotX,teapotY,0);///把座標移動

        glRotatef(angle,0,0,1);///最難的Z軸

        glutSolidTeapot(0.3);

    glPopMatrix();///還原矩陣

    glutSwapBuffers();

}                   ///state:0 :下去 1:上來

int method = 1;

int oldX = 0,oldY = 0;

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

{///做巧妙的修正

    ///teapotX = (x-150/150.0);

    ///teapotY = -(y-150/150.0);

    oldX = x;

    oldY = y;

}

void motion(int x,int y)

{

    if(method==1)

    {

        angle += x-oldX;

    }

    else if(method==2)

    {

        teapotX += (x - oldX)/150.0;

        teapotY -= (y - oldY)/150.0;

    }

    oldX = x;

    oldY = y;

    display();

}

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

{

    if(key=='e')method=1;///旋轉Rotate

    if(key=='w')method=2;///移動Translate

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week03 mouse");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);///設定mouse的motion動作

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}