02160154_周芮安, week11

1.下載freeglut
2.下載openCV2.1
3.設定Progect→Build option

















旋轉茶壺


#include <GL/glut.h> ///3D glut
float angle=0; ///自動轉很帥

void timer(int t)
{/// 1000 msec   50fps:20msec
    glutTimerFunc(10, timer, t+1);
    //printf("timer now\n");
    angle+=1;
    glutPostRedisplay();
}

void display()
{   glEnable(GL_DEPTH_TEST); ///要啟動 Detph Test 深度值的測試,3D顯示才正確
    glClear(GL_COLOR_BUFFER_BIT  | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();///自動轉很帥
        glRotatef(angle, 0,1,0);///自動轉很帥
        glutSolidTeapot(0.5);
    glPopMatrix();///自動轉很帥
    glFlush();
}

int main(int argc, char**argv)
{   glutInit(&argc, argv);
    glutCreateWindow("3D");
    glutDisplayFunc(display); ///顯示
    //glutIdleFunc(display);///自動轉很帥 (閒閒沒事幹, 就重畫)
    glutTimerFunc(10, timer, 0);
    glutMainLoop();
}

轉動地球



設定Timer計時器(等速)


#include <opencv/highgui.h> ///for cvLoadImage()
#include <opencv/cv.h> ///for cvCvtColor()
#include <GL/glut.h> ///3D glut
#include <stdio.h>
float angle=0; ///自動轉很帥
GLUquadric * quad;
void display()
{   glEnable(GL_DEPTH_TEST); ///要啟動 Detph Test 深度值的測試,3D顯示才正確
    glClear(GL_COLOR_BUFFER_BIT  | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();///自動轉很帥
        glRotatef(90, 1,0,0);
        glRotatef(angle, 0,0,1);///自動轉很帥
        gluQuadricTexture(quad, 1);
        gluSphere(quad, 0.5, 30, 30); ///glutSolidTeapot(0.3);
    glPopMatrix();///自動轉很帥
    glFlush();
    angle+=1;///自動轉很帥
}
void myInit()
{
    quad = gluNewQuadric();
    IplImage * img = cvLoadImage("image.jpg"); ///OpenCV讀圖
    cvCvtColor(img,img, CV_BGR2RGB); ///OpenCV轉色彩 (需要cv.h)
    glEnable(GL_TEXTURE_2D); ///1. 開啟貼圖功能
    GLuint id; ///準備一個 unsigned int 整數, 叫 貼圖ID
    glGenTextures(1, &id); /// 產生Generate 貼圖ID
    glBindTexture(GL_TEXTURE_2D, id); ///綁定bind 貼圖ID
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖T, 就重覆貼圖
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖S, 就重覆貼圖
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); /// 貼圖參數, 放大時的內插, 用最近點
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); /// 貼圖參數, 縮小時的內插, 用最近點
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData);
}   ///最後一行最難/最重要, 所貼圖影像的資料都設定好
void timer(int t)
{/// 1000 msec   50fps:20msec
    glutTimerFunc(20, timer, 0);
    //printf("timer now\n");
    glutPostRedisplay();
}
int main(int argc, char**argv)
{   glutInit(&argc, argv);
    glutCreateWindow("3D");
    glutDisplayFunc(display); ///顯示
    //glutIdleFunc(display);///自動轉很帥 (閒閒沒事幹, 就重畫)
    glutTimerFunc(0, timer, 0);

    myInit(); ///我的 init 初始化 把貼圖準備好 前面OpenCV 2行, 後面 OpenGL 9行
    glutMainLoop();
}

茶壺旋轉繞圈

#include <GL/glut.h> ///3D glut

#include <math.h>

float angle=0, potX=0, potY=0;

void timer(int t)

{

    glutTimerFunc(10, timer, t+1);

    angle+=1;

    potX=cos(angle/180.0*3.14);

    potY=0.5*sin(angle/180.0*3.14);

    glutPostRedisplay();

}

void display()

{   glEnable(GL_DEPTH_TEST);

    glClear(GL_COLOR_BUFFER_BIT  | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(potX, potY, 0);

        glRotatef(angle, 0,1,0);///自動轉很帥

        glutSolidTeapot(0.5);

    glPopMatrix();///自動轉很帥

    glFlush();

}

int main(int argc, char**argv)

{   glutInit(&argc, argv);

    glutCreateWindow("3D");

    glutDisplayFunc(display); ///顯示

    //glutIdleFunc(display);///自動轉很帥 (閒閒沒事幹, 就重畫)

    glutTimerFunc(10, timer, 0);

    glutMainLoop();

}

旋轉上下移動

#include <GL/glut.h> ///3D glut

#include <math.h>

float angle=0, potX=0, potY=0;

void timer(int t)

{

    glutTimerFunc(10, timer, t+1);

    angle+=1;

    //potX=cos(angle/180.0*3.14);

    potY=0.5*sin(angle/180.0*3.14);

    glutPostRedisplay();///要更新

}

void display()

{   glEnable(GL_DEPTH_TEST);

    glClear(GL_COLOR_BUFFER_BIT  | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(potX, potY, 0);

        glRotatef(angle, 0,1,0);///把改過的angle轉動

        glutSolidTeapot(0.5);

    glPopMatrix();

    glFlush();

}

int main(int argc, char**argv)

{   glutInit(&argc, argv);

    glutCreateWindow("3D");

    glutDisplayFunc(display); ///顯示

    //glutIdleFunc(display);///自動轉很帥 (閒閒沒事幹, 就重畫)

    glutTimerFunc(10, timer, 0);///用timer就可以等速

    glutMainLoop();

}

點擊滑鼠

拖曳茶壺

向後拉

放開後茶壺會往外飛

#include <GL/glut.h> ///3D glut

#include <math.h>

float angle=0, potX=0, potY=0, potVX, potVY;

int potState=0;

void timer(int t)

{

    glutTimerFunc(10, timer, t+1);

    angle+=1;

    if(potState==0) potY=0.5*sin(angle/180.0*3.14);

    if(potState==2)

        {

            potX+=potVX;

            potY+=potVY;

        }

    glutPostRedisplay();///要更新

}

void display()

{   glEnable(GL_DEPTH_TEST);

    glClear(GL_COLOR_BUFFER_BIT  | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.01);

    glPushMatrix();

        glTranslatef(potX, potY, 0);

        glRotatef(angle, 0,1,0);///把改過的angle轉動

        glutSolidTeapot(0.01);

    glPopMatrix();

    glFlush();

}

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

{

    if(state==GLUT_DOWN){potState=1;}

    else if(state==GLUT_UP){

            potState=2;

            potVX=-(x-350)/3500.0;

            potVY=(y-350)/3500.0;

    }

}

void motion(int x, int y)

{

    if(potState==1)

    {

        potX=(x-350)/350.0;

        potY=-(y-350)/350.0;

    }

}

int main(int argc, char**argv)

{   glutInit(&argc, argv);

    glutCreateWindow("3D");

    glutReshapeWindow(700,700);

    glutDisplayFunc(display); ///顯示

    //glutIdleFunc(display);///自動轉很帥 (閒閒沒事幹, 就重畫)

    glutTimerFunc(10, timer, 0);///用timer就可以等速

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}