static Color Sample(const BitmapPtr bitmap, float u, float v)
{
u32 width = bitmap->GetWidth();
u32 height = bitmap->GetHeight();
float fx = XAddresserType::CalcAddress(u, width);
int x = XAddresserType::FixAddress(Mathf::RoundToInt(fx), width);
float fy = YAddresserType::CalcAddress(v, height);
int y = YAddresserType::FixAddress(Mathf::RoundToInt(fy), height);
return bitmap->GetColor(x, y);
}
static Color Sample(const BitmapPtr bitmap, float u, float v)
{
u32 width = bitmap->GetWidth();
u32 height = bitmap->GetHeight();
float fx = XAddresserType::CalcAddress(u, width);
int x0 = Mathf::FloorToInt(fx);
float fy = YAddresserType::CalcAddress(v, height);
int y0 = Mathf::FloorToInt(fy);
float xFrac = fx - x0;
float yFrac = fy - y0;
x0 = XAddresserType::FixAddress(x0, width);
y0 = YAddresserType::FixAddress(y0, height);
int x1 = XAddresserType::FixAddress(x0 + 1, width);
int y1 = YAddresserType::FixAddress(y0 + 1, height);
Color c0 = bitmap->GetColor(x0, y0);
Color c1 = bitmap->GetColor(x1, y0);
Color c2 = bitmap->GetColor(x0, y1);
Color c3 = bitmap->GetColor(x1, y1);
return Color::Lerp(c0, c1, c2, c3, xFrac, yFrac);
}