internal static void DrawNormalGlare(LightId light, ref MyGlareDesc glare, Vector3 L, float distance)
{
//if (m_occlusionRatio <= MyMathConstants.EPSILON)
// return;
var intensity = glare.Intensity;
var maxDistance = glare.MaxDistance;
//float alpha = m_occlusionRatio * intensity;
float alpha = intensity;
const float minGlareRadius = 0.2f;
const float maxGlareRadius = 10;
float radius = MathHelper.Clamp(glare.Range * 20, minGlareRadius, maxGlareRadius);
float drawingRadius = radius * glare.Size;
if (glare.Type == MyGlareTypeEnum.Directional)
{
float dot = Vector3.Dot(L, glare.Direction);
alpha *= dot;
}
if (alpha <= MyMathConstants.EPSILON)
{
return;
}
if (distance > maxDistance * .5f)
{
// distance falloff
float falloff = (distance - .5f * maxDistance) / (.5f * maxDistance);
falloff = (float)Math.Max(0, 1 - falloff);
drawingRadius *= falloff;
alpha *= falloff;
}
if (drawingRadius <= float.Epsilon)
{
return;
}
var color = glare.Color;
color.A = 0;
MyBillboardsHelper.AddBillboardOriented(glare.Material.ToString(),
color * alpha, light.SpotPosition, MyEnvironment.InvView.Left, MyEnvironment.InvView.Up, drawingRadius);
}
