啵咕咕的筆記WEEK05

 啵咕咕的筆記WEEK05

## 安裝OPEN CV

桌面，上課用軟體

! ADD OPENCV TO....path

!裝在預設

!裝完重開codeblock

!設定setting compiler加入3個設定

!search目錄compiler include

!search目錄linker lib

!linker  設定三檔名 cv210 cxcore210 highgui210

#week05-1_opencv.cpp

抓圖片丟C:\image.jpg

new empty file

#include<opencv/highgui.h>

int main()

{

    IplImage * img = cvLoadImage("c:/image.jpg");

    cvShowImage("week05", img);

    cvWaitKey(0);

}

#課本範例

jsyeh.org/3dcg10 載 data win32

下載\windows\data\一堆圖檔

執行texture.exe改glTexCoord2f貼圖座標

#week05_opencv_cvLoadImage

照舊前幾周安裝freeglut，貼11行程式

再加3行剛剛程式

#include <GL/glut.h>

#include<opencv/highgui.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

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

{

    IplImage * img = cvLoadImage("c:/image.jpg");

    cvShowImage("opencv", img);

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week05");

    glutDisplayFunc(display);

    glutMainLoop();

}

#week05-3

moodle連結+剛剛的+myTexture("c:image.jpg");

#week05-4 背景

void display裡+

glBegin(GL_POLYGON);

        glTexCoord2f(0,0); glVertex2f(-1,-1);

        glTexCoord2f(0,1); glVertex2f(-1,+1);

        glTexCoord2f(1,1); glVertex2f(+1,+1);

        glTexCoord2f(1,0); glVertex2f(+1,-1);

  glEnd();

#week05-5earth

#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>

GLUquadric * quad = NULL;

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;

}

float angle = 0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glEnable(GL_DEPTH_TEST);

    glPushMatrix();

        glRotatef(90, 1, 0, 0);

        glRotatef(angle++, 0, 0, 1);

        gluSphere(quad, 1, 30, 30);

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc, char**argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week05 texture again");

    glutIdleFunc(display);

    glutDisplayFunc(display);

    myTexture("c:/earth.jpg");

    quad = gluNewQuadric();

    gluQuadricTexture(quad, 1);

    glutMainLoop();

}