小编Ben*_*ent的帖子

我正在尝试使用OpenGL渲染freetype字体,遵循http://en.wikibooks.org/wiki/OpenGL_Programming/Modern_OpenGL_Tutorial_Text_Rendering_02上发布的示例.

我已经能够从字体生成纹理图集,创建着色器和创建四边形.我似乎被困在的是将纹理传递到着色器和/或为我的四边形获得正确的UV.现在一直在努力,真的需要帮助.

以下是我用来创建纹理图集的结构.

struct FontCharacter
    {
        float advanceX;
        float advanceY;

        float bitmapWidth;
        float bitmapHeight;

        float bitmapLeft;
        float bitmapTop;

        float uvOffsetX;
        float uvOffsetY;
    };

    struct FontTextureAtlas
    {
        GLuint texture;
        GLuint textureUniform;

        int width;
        int height;

        FontCharacter characters[128];

        FontTextureAtlas(FT_Face face, int h, GLuint tUniform)
        {
            FT_Set_Pixel_Sizes(face, 0, h);
            FT_GlyphSlot glyphSlot = face->glyph;

            int roww = 0;
            int rowh = 0;
            width = 0;
            height = 0;

            memset(characters, 0, sizeof(FontCharacter));

            for (int i = 32; i < 128; i++)
            {
                if …