11160933_week03

 1.複製十行

#include <GL/glut.h>

void display()

{

glutSolidTeapot(0.3);

glutSwapBuffers();

}

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

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("GLUT Shapes");

glutDisplayFunc(display);

glutMouseFunc(mouse);///+

glutMainLoop();

}

2.+一行

glutMouseFunc(mouse);///+

3.點茶壺會出現Hello Mouse

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

{

    printf("HelloMouse!\n");

}

4.print座標

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

5.printf 程式

    if(state==GLUT_DOWN)

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

6.https://jsyeh.org/3dcg10/ 下載data\模型檔 win32\transformation

7.new file week03_mouse_glTranslatef

8.copy line46 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

line49 glPushMatrix();

line54 glPopMatrix();

9.copy glMouse

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();

    glPopMatrix();///偷

        glTranslatef(teapotX, teapotY, 0);

        glutSolidTeapot( 0.3 );

glutSolidTeapot(0.3);

glutSwapBuffers();

}

##理解 glRotatef(角度 ,x y, z)

1. 右手比讚

2.轉動軸為拇指

轉動方向為其他拇指的轉動方向

3.對y軸轉 比個讚

x軸 拇指向右

-y軸 倒讚

z軸 拇指向臉

10.new file week03_mouse_rotate

11. copy translatef

+float angle = 0;

glRotatef(angle, 0, 0, 1);

void motion(int x, int y)

{

    angle = x;

    display();

}

extra

12.new file week03_mouse_translate_rotate

13.copy last file

14.