week09

 1.

https://jsyeh.org/3dcg10/ 

data  win32

打開Texture

2.

安裝OpenCV

3.

 File-New-EmptyFile, 存成 week09_opencv.cpp 程式很簡單

 Setting-Compiler Setting 

 Search directories 的 Compiler 要 Add C:\OpenCV2.1\include

 Search directories 的 Linker 要 Add C:\OpenCV2.1\lib

Setting-Compiler Setting 裡面 Linker setting-> cv210、 cxcore210、 highgui210

4.

#include <opencv/highgui.h>

int main()

{ 

IplImage * img = cvLoadImage("檔名.png"); //讀圖

cvShowImage("week09", img); //秀圖

cvWaitKey(0); //等任意鍵繼續

}

5.

*圖片放freeglut-bin

#include <GL/glut.h>

#include <opencv/highgui.h>

void myTexture()

{

    IplImage * img = cvLoadImage("00.png");

    cvShowImage("img", img);

    cvWaitKey(0);

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week09");

    glutDisplayFunc(display);

    myTexture();

}

6.

#include <GL/glut.h>

#include <opencv/highgui.h> ///+

void myTexture()///+

{

    IplImage * img = cvLoadImage("earth.jpg");

    cvShowImage("img",img);

    cvWaitKey(0);

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glColor3f(1, 1, 0);

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

int main (int argc, char**argv)

{

    glutInit(&argc, argv );

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week09 texture");

    glutDisplayFunc( display );

    myTexture();///+

    glutMainLoop();

    return 0;

}

```

#include <opencv/highgui.h> ///使用 OpenCV 2.1 比較簡單, 只要用 High GUI 即可

#include <opencv/cv.h>

#include <GL/glut.h>

int myTexture(char * filename)

{

    IplImage * img = cvLoadImage(filename); ///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);

return id;

}  

```

*十行茶壺程式：

#include <GL/glut.h>

 void display()

 {

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        glutSolidTeapot(0.3);

    glutSwapBuffers();

 }

int main(int argc,char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week09 texture");

    glutDisplayFunc(display);

    glutMainLoop();

    return 0;

}