/// <summary>
/// Recalculates the geometry of every attached shadow and builds a batched mesh.
/// </summary>
/// <param name="frustumPlanes">
/// The frustum planes of camera that renders the scene.
/// Ignored when recalculating static shadows.
/// </param>
/// <param name="skipRecalculate">
/// Whether to skip recalculation of shadow geometry.
/// </param>
private void RecalculateGeometry(Plane[] frustumPlanes, bool skipRecalculate)
{
// No need to rebuild static mesh when it hasn't changed
bool mustRebuildMesh = !_isStatic || _isStaticDirty;
int currentVisibleShadowsCount = 0;
if (_isStatic)
{
frustumPlanes = null;
}
for (int i = 0, shadowCount = _shadowsList.Count; i < shadowCount; i++)
{
SwiftShadow shadow = _shadowsList.Items[i];
if (!skipRecalculate)
{
SwiftShadow.RecalculateShadowResult recalculateResult = shadow.RecalculateShadow(frustumPlanes, false);
switch (recalculateResult)
{
case SwiftShadow.RecalculateShadowResult.ChangedManager:
i--;
shadowCount = _shadowsList.Count;
continue;
case SwiftShadow.RecalculateShadowResult.Recalculated:
mustRebuildMesh = true;
break;
}
}
if (shadow.IsVisible)
{
currentVisibleShadowsCount++;
}
}
if (!mustRebuildMesh || (_visibleShadowsCount == 0 && currentVisibleShadowsCount == 0))
{
return;
}
_visibleShadowsCount = currentVisibleShadowsCount;
if (_visibleShadowsCount != 0)
{
bool isMeshNull = _mesh == null;
if (isMeshNull)
{
CreateMesh();
}
RebuildMesh(isMeshNull || _isStatic || _isStaticDirty);
_isStaticDirty = false;
}
_lastVisibleShadowsCount = _visibleShadowsCount;
}
/// <summary>
/// Registers the shadow in this manager.
/// </summary>
/// <param name="shadow">
/// The shadow to register.
/// </param>
public void RegisterShadow(SwiftShadow shadow)
{
if (_isStatic)
{
shadow.RecalculateShadow(null, true);
}
_shadowsList.Add(shadow);
_isStaticDirty = true;
}
