Function wrap_image

example/example.cpp:572–649

}

void wrap_image(const image& src, image& dst, int gridX, int gridY, float maxOffset, bool randomize, basisu::rand &rnd)
{
    if (gridX < 1) gridX = 1;
    if (gridY < 1) gridY = 1;

    const int vxCountX = gridX + 1;
    const int vxCountY = gridY + 1;
    const int stride = vxCountX;

    const int w = src.get_width();
    const int h = src.get_height();
        
    dst.resize(w, h);

    dst.set_all(g_black_color);

    basisu::vector<vec2F> verts(vxCountX * vxCountY);
    basisu::vector<vec2F> uvs(vxCountX * vxCountY);
    basisu::vector<color_rgba> cols(vxCountX * vxCountY);

    for (int gy = 0; gy <= gridY; ++gy)
    {
        for (int gx = 0; gx <= gridX; ++gx)
        {
            float x = (gx / float(gridX)) * (w - 1);
            float y = (gy / float(gridY)) * (h - 1);

            float rx = x;
            float ry = y;

            if (randomize)
            {
                rx += rnd.frand(-maxOffset, maxOffset);
                ry += rnd.frand(-maxOffset, maxOffset);
            }

            verts[gy * stride + gx] = { rx, ry };

            float u = gx / float(gridX);
            float v = gy / float(gridY);

            u = std::max(0.0f, std::min(1.0f, u));
            v = std::max(0.0f, std::min(1.0f, v));

            uvs[gy * stride + gx] = { u, v };

            color_rgba c(g_white_color);

            cols[gy * stride + gx] = c;
        }
    }

    for (int gy = 0; gy < gridY; ++gy)
    {
        for (int gx = 0; gx < gridX; ++gx)
        {
            int i0 = gy * stride + gx;
            int i1 = i0 + 1;