void Update()
{
if (Context == null)
{
return;
}
// [TODO] need to consider camera distane here?
Frame3f sceneFrameW = Context.Scene.SceneFrame;
if (sceneFrameW.EpsilonEqual(lastSceneFrameW, 0.001f))
{
return;
}
lastSceneFrameW = sceneFrameW;
if (AdjustShadowDistance)
{
// use vertical height of light to figure out appropriate shadow distance.
// distance changes if we scale scene, and if we don't do this, shadow
// map res gets very blurry.
Vector3f thisW = lights[0].transform.position;
float fHeight =
Vector3f.Dot((thisW - sceneFrameW.Origin), sceneFrameW.Y);
float fShadowDist = fHeight * 1.5f;
// lights need to be in-range
if (fShadowDist < LightDistance)
{
fShadowDist = LightDistance * 1.5f;
}
// need to be a multiple of eye distance
float fEyeDist = sceneFrameW.Origin.Distance(Camera.main.transform.position);
fShadowDist = Mathf.Max(fShadowDist, 1.5f * fEyeDist);
int nShadowDist = (int)g3.Snapping.SnapToIncrement(fShadowDist, 50);
if (cur_shadow_dist != nShadowDist)
{
QualitySettings.shadowDistance = nShadowDist;
cur_shadow_dist = nShadowDist;
}
}
}