OpenGl紋理

Question

我試圖將2個紋理應用到我的關卡中，但代碼會編譯，但關卡完全變成白色，

struct Image 
{
    unsigned long size_x;
    unsigned long size_y;
    char *data;
}

typedef struct Image Image;

const int textureCount = 2;

Image myTextureData[textureCount];
GLuint theTexture[textureCount];

char* textureFilenames0[textureCount] = {"road.bmp"};
char* textureFilenames1[textureCount] = {"building.bmp"};

紋理加載器類

void textureLoader() 
{

    /*glPixelStorei(GL_UNPACK_ALIGNMENT, 1);*/

    glGenTextures(2, theTexture);


    glBindTexture(GL_TEXTURE_2D, theTexture[0]);
    for(int k=0; k < textureCount; k++) 
    {
        if(!imageLoader(textureFilenames0[k], &myTextureData[k])) 
            exit(1);

        glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
        glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);

        gluBuild2DMipmaps(GL_TEXTURE_2D, 3, myTextureData[k].size_x, myTextureData[k].size_y, GL_RGB, GL_UNSIGNED_BYTE, myTextureData[k].data);

    glBindTexture(GL_TEXTURE_2D, theTexture[1]);
    for(int k=0; k < textureCount; k++) 
    {
        if(!imageLoader(textureFilenames1[k], &myTextureData[k])) 
            exit(1);

        glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
        glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);

        gluBuild2DMipmaps(GL_TEXTURE_2D, 3, myTextureData[k].size_x, myTextureData[k].size_y, GL_RGB, GL_UNSIGNED_BYTE, myTextureData[k].data);
    }
}

Answer 1

你打過電話嗎

glEnable(GL_TEXTURE_2D);

和glTexCoord2或glTexCoordPointer嗎？

另外，在上傳數據之前，請嘗試設置紋理參數。

最后，使用循環時，需要將所有文件名放在一個數組中，例如

char* textureFilenames[textureCount] = {"road.bmp", "building.bmp"};

或者你可以擺脫循環並寫

char* textureFilenames0 = "road.bmp";
char* textureFilenames1 = "building.bmp";

但是沒有textureCount包含道路位圖的textureCount文件。