Yweek05

week05 

open cv

1.安裝opencv

2.Add OpenCV to system PATH

3.用預設目錄

4.檔案總管檢查C:\多了Opencv目錄裡面include lib bin

5.關閉Opencv 才會有Opencv

設定codeblock

1.Setting-Compiler 目錄compiler

2.Setting-Compiler 目錄linker要加入lib目錄

3.Setting-Compiler linker setting 要加入cv210 cxcore210 highgui210三個檔名

程式碼:

#include <opencv/highgui.h>

int main()

{

    IplImage*img=cvLoadImage("c:/micky.png");

    cvShowImage("img",img);

    cvWaitKey(0);

}

下載課本範例

1-1 到https://jsyeh.org/3dcg10/ 

1-2 下載win32 跟data兩個檔案

1-3 在下載的資料夾，把windows.zip =>windows資料夾

       把data.zip裡面的data拉到下載\windows資料夾裡

1-4 開啟Texture.exe

老師讓我們觀察glTexCoord2f (tx,ty) , glVertex2f  (x,y)的變化

P.s  moodle 下載freeglut，並點開，直接把freeglut拖移到桌面

把桌面\freglut\lib\libfreeglut.a 複製成 libglut32.a

week05-1_texture_opencv_cvLoadImage

#include <opencv/highgui.h>

#include <GL/glut.h>

void display(){

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    IplImage * img = cvLoadImage("C:/oppps.jpg");

    cvShowImage("opencv",img);

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutDisplayFunc(display);

    glutMainLoop();

}

# week05-2_texture_teapot_erath

#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;

}

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("week05_texture");

    glutDisplayFunc(display);

    myTexture("c:/earth.jpg");

    glutMainLoop();

}

#week05-3_texture_polygon

貼上05-2的程式 再加上四行

glBegin(GL_POLYGON);

        glTexCoord2d(0,0); glVertex2f(-1,-1);

        glTexCoord2d(1,0); glVertex2f(+1,-1);

        glTexCoord2d(1,1); glVertex2f(+1,+1);

        glTexCoord2d(0,1); glVertex2f(-1,+1);

        glEnd();

#week05-4_texture_earth_rotating