使用openGL，SOIL加载图像 [英] Image loading using openGL, SOIL

问题描述

我尝试了很多使用SOIL在openGL中加载和显示图像的例子。
在运行下面的源代码时，它只显示没有图像的四边形。
我试图打开一个名为foto的图像。
我把图片文件放在程序的文件夹中。

I tried a lot of examples for loading and displaying images in openGL using SOIL. while running the source code below, it displays just a wite quad without an image. I tried to open an image called: foto. I placed the image-file in the folder of the program.

bool* keyStates = new bool[256];
GLuint texture[0];

void resize(int height, int width) {
    const float ar = (float) width / (float) height;
    glViewport(0, 10, width, height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();

    glFrustum(-ar, ar, -1.0, 1.0, 2.0, 90.0);
    //gluLookAt(0, 2, 0, -1, 1, -3, 0, 1, 0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity() ;
}
void keyOperations (void) {
    if (!keyStates['a']) {}
}
static void Draw(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
    glTranslatef(0.0f,0.0f,-5.0f);
    texture[0] = SOIL_load_OGL_texture // load an image file directly as a new OpenGL texture
    (
        "foto.png",
        SOIL_LOAD_AUTO,
        SOIL_CREATE_NEW_ID,
        SOIL_FLAG_MIPMAPS | SOIL_FLAG_INVERT_Y | SOIL_FLAG_NTSC_SAFE_RGB | SOIL_FLAG_COMPRESS_TO_DXT
    );
// allocate a texture name

    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glBegin(GL_QUADS);
    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);
    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);
    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f,  1.0f);
    glEnd();
    glutSwapBuffers();
}
void keyPressed (unsigned char key, int x, int y) {
    keyStates[key] = false;
}
void keyUp (unsigned char key, int x, int y) {
    keyStates[key] = true;
}
int main(int argc, char **argv)
{
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
    glutInit(&argc, argv);
    glutInitWindowSize(600, 600);
    glutCreateWindow("ugh fml");
    glutReshapeFunc(resize);
    glutDisplayFunc(Draw);
    glutKeyboardFunc(keyPressed);
    glutKeyboardUpFunc(keyUp);
    /////////////////////////////////////
    glEnable(GL_TEXTURE_2D);
    glShadeModel(GL_SMOOTH);
    glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
    glClearDepth(1.0f);
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LEQUAL);
    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
    glutMainLoop();
}

推荐答案

你正在使用亲戚访问路径 foto.png 。

You're using a relative path to access foto.png.

确保您的工作目录是你期望的地方。

Make sure your working directory is where you expect.

有些IDE喜欢将工作目录更改为某个地方其他而不是可执行文件。

Some IDEs like to change the working directory to someplace other than where the executable is.

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