肥胖人生week3

 1用上週的一行 下載freeglut 拉到桌面

2點開lib後將freeglut.a復製

3改名為libglut32.a (124KB)

到codeblock開新的專案 file > project

4點開GLUT

5檔名為week03_mouse

6將連結貼上

7.改程式碼 執行

8.在修改一次

#include <GL/glut.h>

#include <stdio.h>

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

{

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

}

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);

    glutMouseFunc(mouse);

    glutMainLoop();

}

9.修改程式碼

#include <stdio.h>

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

{

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

    if(state==GLUT_DOWN)

        printf("glVertex2f((%d-150)/150.0, -(%d-150)/150.0);\n",x,y);

}

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);

    glutMouseFunc(mouse);

    glutMainLoop();

}

10.到https://jsyeh.org/3dcg10/下載data win32

11.

解壓縮windows.zip再把data.zip解壓縮放到windows中

12.執行transformation

13.開啟新專案檔名week03_mouse_glRotatef

14.改程式碼

#include <GL/glut.h>

#include <stdio.h>

float teapotX = 0, teapotY = 0;

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

{

    teapotX=(x-150)/150.0;

    teapotY= -(y-150)/150.0;

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(teapotX, teapotY, 0);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week03 mouse");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMainLoop();

}

13.轉動有點像國中所學的安培右手定則可以利用右手比讚理解

    對y軸轉比讚，對x軸轉要把拇指向右，對-y軸轉比倒讚，對

    z軸轉 拇指指向鼻子

14.修改程式碼

#include <GL/glut.h>

#include <stdio.h>

float teapotX = 0, teapotY = 0;

float angle = 0;

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

{

    teapotX=(x-150)/150.0;

    teapotY= -(y-150)/150.0;

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0 ,0, 1);///對z軸轉

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

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);

    glutMainLoop();

}

15.新增專案 week03_mouse_translate_rotate

打程式碼