public class MathHelpers
{
    public static float Edge(float2 a, float2 b, float2 c)
    {
        return (c.x - a.x) * (b.y - a.y) - (c.y - a.y) * (b.x - a.x);
    }
    
    public static float2 NDCToScreen(float2 ndc, int width, int height)
    {
        float x = (ndc.x + 1f) * 0.5f * width;
        float y = (1f - (ndc.y + 1f) * 0.5f) * height; // flip Y
        return new float2(x, y);
    }
}