week05 牢底座穿

 #Week05

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1.安裝OpenCV 2.1(桌面)

2.記得安裝第三步，用預設的C:OpenCV2.1不要動

3.檔案總管檢查C:/多了OpenCV2.1目錄 裡面有include有lib有bin三個東西

4.關閉CodeBlocks再開，才會認識OpenCV

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codeblocks設定

1.Setting-Compiler 目錄Compiler 要加入include目錄

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

--- Week05-1 opencv-.cpp

#include <opencv/highgui.h>///使用OpenCV的高級外掛

int main()

{///大寫I，小寫pl(Intel performance library)

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

    ///在大寫的Image,圖檔請放在c:目錄裡

    cvShowImage("img",img);///秀圖

    cvWaitKey(0);///再任意鍵，再繼續

}

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##課本範例-貼圖

連上網站jsyeh.org/3dcg10

Texture.exe

跑範例觀察

##week05-1_texture_opencv_cvLoadImage

#include <GL/glut.h>

#include<opencv/highgui.h>

void display()

{

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

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

{

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

    cvShowImage("opencv",img);///秀圖

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week05-1 texture opencv");

    glutDisplayFunc(display);

    glutMainLoop();

}

----

##week05-2_texture_teapot_earth

#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;

}

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 texture");

    glutDisplayFunc(display);

    myTexture("c:/earth.jpg");

    glutMainLoop();

}

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##week05-3_texture_polygon

用上面程式

再加四行

glBegin(GL_POLYGON);

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

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

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

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

glEnd();

----

##week05-4_texture_earth_rotating

第二個程式改

float angle=0; 要有選轉角度

---

glEnable(GL_DEPTH_TEST);///開啟3D功能(深度測試) 

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);///清背景

    glPushMatrix();

        glRotatef(angle++,0,1,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

---

glutIdleFunc(display);

----

轉地球

GLUquadric * quad = NULL; 畫地球的quad二次曲面

glRotated(90,1,0,0);轉90度 上下的軸

        glRotatef(angle++,0,1,0); 對著z軸轉

 gluSphere(quad,1,30,30); 二次曲面 畫圓球當地球

quad = gluNewQuadric(); 準備好quad二次曲面

gluQuadricTexture(quad, 1); 準備好quad二次曲面的貼圖