盛week03

week03 mouse

1.安裝freeglut 拉到桌面 ,改lib 內檔名為libglut32.a

2.打開Codeblocks 新增專案 week03_mouse

3.10行程式貼上

4.加上mouse 的程式

5.執行程式就會出現茶壺,點滑鼠就會有Hello World

 

2..將 printf("Hello World\n");

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

  執行 就會有滑鼠位子和座標

程式碼:

#include <GL/glut.h>

#include <stdio.h>

void display()

{

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

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

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week03 mouse");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMainLoop();

}

3.把void mouse (int button,int state,int x,int y){}裡面新增if(state==GLUT_DOWN){

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

        }就會有座標了

程式碼:

#include <GL/glut.h>

#include <stdio.h>

void display()

{

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    if(state==GLUT_DOWN){

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

        }

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week03 mouse");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMainLoop();

}

4.滑鼠點哪 茶壺跟著移動 

程式碼:

#include <GL/glut.h>

#include <stdio.h>

float teapotX=0,teapotY=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(teapotX,teapotY,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    teapotX = (x-150)/150.0;

    teapotY = -(y-150)/150.0;

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week03 mouse glTranslatef");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMainLoop();

}

5.茶壺可以轉動

新增角度 和 motions程式碼

程式碼:

#include <GL/glut.h>

#include <stdio.h>

float teapotX=0,teapotY=0;

float angle = 0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        ///glTranslatef(teapotX,teapotY,0);

        glRotatef(angle,0,0,1);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    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_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week03 mouse glTranslatef");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}

6.可以轉動移位置

程式碼:

#include <GL/glut.h>

#include <stdio.h>

float teapotX=0,teapotY=0;

float angle = 0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(teapotX,teapotY,0);

        glRotatef(angle,0,0,1);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int method=1;

int oldX=0,oldY=0;

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

{

    ///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;

    if(key=='w')method=2;

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week03 mouse glTranslatef");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}