為哥的圖學筆記week10

Step01-1:開啟一個GLUT專案

Step01-2:複製上週貼圖座標的程式碼

```

#include <opencv/highgui.h>

#include <opencv/cv.h>

#include <GL/glut.h>

int myTexture(char * filename)

{

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

    cvCvtColor(img,img, CV_BGR2RGB);

    glEnable(GL_TEXTURE_2D);

    GLuint id;

    glGenTextures(1, &id);

    glBindTexture(GL_TEXTURE_2D, id);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    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("earth.jpg");

    glutMainLoop();

}

```

OpenCV設定: setting-compiler , search directories , compiler include: C:\opencv2.1\include

OpenCV設定: setting-compiler , search directories , Linker lib目錄: C:\opencv2.1\lib

OpenCV設定: setting-compiler , Linker設定: 咒語 cv210 cxcore210 highgui210

XXX.jpg 圖檔要放哪: 工作目錄working_dir   (in C:\Users\...\Desktop\freeglut\bin)

Step02-1:

Step02-2:第二個主題: 上週貼圖+貼到圓球=會轉的地球 

1.新專案week10_texture_earth

最上面要加這行

display（）；

程式碼:

#include <opencv/highgui.h>

#include <opencv/cv.h>

#include <GL/glut.h>

GLUquadric * sphere = NULL;///指標指到二次曲面

int myTexture(char * filename)

{

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

    cvCvtColor(img,img, CV_BGR2RGB);

    glEnable(GL_TEXTURE_2D);

    GLuint id;

    glGenTextures(1, &id);

    glBindTexture(GL_TEXTURE_2D, id);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    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);

    gluQuadricTexture(sphere,1);///設好貼圖

    gluSphere(sphere,1,30,30);///畫圓球

    glutSwapBuffers();

}

int main(int argc, char**argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week10 texture");

    glutDisplayFunc(display);

    myTexture("earth.jpg");///地球的地圖

    sphere = gluNewQuadric();///準備好二次曲面

    glutMainLoop();

}

地球旋轉:

程式碼: