09163051 上課筆記 week10

 1. 下載安裝軟體

    安裝  freeglut(lib/libglut32.a) OpenCv 2.1.0

1-1. 開啟新glut專案 並把上周程式碼複製進去

    #include <opencv/cv.h>
#include <GL/glut.h>
int myTexture(char * filename)
{
    IplImage * img = cvLoadImage(filename);
    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(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    //glutSolidTeapot(0.3);
    glBegin(GL_POLYGON);
    glTexCoord2f( 0 , 1 );  glVertex2f( -1 , -1);
    glTexCoord2f( 1 , 1 );  glVertex2f( 1 , -1);
    glTexCoord2f( 1 , 0 );  glVertex2f( 1 , 1);
    glTexCoord2f( 0 , 0 );  glVertex2f( -1 , 1);
    glEnd();
    glutSwapBuffers();
}

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week09 Texture");
    glutDisplayFunc(display);
    myTexture("earth.jpg");
    glutMainLoop();
    return EXIT_SUCCESS;
}