protected override void CreateShadowMap(EntityLightShadow light)
{
// create the shadow map
var shadowMap = new ShadowMap
{
LightDirection = light.Light.LightDirection,
LightPosition = light.Entity.Transformation.Translation,
ShadowMapSize = light.Light.ShadowMapMaxSize,
ShadowNearDistance = light.Light.ShadowNearDistance,
ShadowFarDistance = light.Light.ShadowFarDistance,
CascadeCount = light.Light.Type == LightType.Directional ? light.Light.ShadowMapCascadeCount : 1, // cascades are only supported for directional shadow maps
LightType = light.Light.Type,
Fov = light.Light.SpotFieldAngle,
Filter = light.Light.ShadowMapFilterType,
Layers = light.Light.Layers
};
// find or create the shadow map texture
ShadowMapTexture chosenTexture = null;
chosenTexture = AllocateOrChooseTexture(shadowMap, light.Light.ShadowMapFilterType == ShadowMapFilterType.Variance ? texturesVsm : texturesDefault);
shadowMap.Texture = chosenTexture;
InternalShadowMaps.Add(shadowMap);
light.ShadowMap = shadowMap;
}
/// <inheritdoc/>
protected override void OnEntityRemoved(Entity entity, EntityLightShadow data)
{
if (ManageShadows && data.ShadowMap != null)
{
RemoveShadowMap(data);
}
base.OnEntityRemoved(entity, data);
}
protected override void CreateShadowMap(EntityLightShadow light)
{
// create the shadow map
var shadowMap = new ShadowMap
{
LightDirection = light.Light.LightDirection,
ShadowMapSize = light.Light.ShadowMapMinSize,
ShadowNearDistance = light.Light.ShadowNearDistance,
ShadowFarDistance = light.Light.ShadowFarDistance,
CascadeCount = light.Light.ShadowMapCascadeCount,
Filter = light.Light.ShadowMapFilterType,
Layers = light.Light.Layers
};
InternalShadowMaps.Add(shadowMap);
light.ShadowMap = shadowMap;
}
private bool ChooseShadowMapTexture(EntityLightShadow light, List <ShadowMapTexture> shadowMapTextures, Dictionary <ShadowMapTexture, int> shadowMapRemainingSize)
{
var shadowMap = light.ShadowMap;
var shadowMapSize = light.Light.ShadowMapMaxSize;
// find best texture
while (shadowMapSize > 0)
{
if (shadowMapSize < light.Light.ShadowMapMinSize)
{
shadowMapSize = light.Light.ShadowMapMinSize;
}
foreach (var shadowMapTexture in shadowMapTextures)
{
if (shadowMapTexture.GuillotinePacker.TryInsert(shadowMapSize, shadowMapSize, shadowMap.CascadeCount))
{
shadowMap.Texture = shadowMapTexture;
shadowMapRemainingSize[shadowMapTexture] = shadowMapRemainingSize[shadowMapTexture] - (shadowMap.CascadeCount * shadowMapSize * shadowMapSize);
shadowMap.ShadowMapSize = shadowMapSize;
return(true);
}
}
if (shadowMapSize == light.Light.ShadowMapMinSize)
{
break;
}
shadowMapSize /= 2;
}
// Issue a warning only once
if (!shadowMapFullWarningDone)
{
shadowMapFullWarningDone = true;
Logger.Warning("Unable to find a texture to create the shadow map.");
}
shadowMap.Texture = null;
return(false);
}
/// <inheritdoc/>
protected override void OnEntityRemoved(Entity entity, EntityLightShadow data)
{
if (ManageShadows && data.ShadowMap != null)
{
InternalShadowMaps.Remove(data.ShadowMap);
List <ShadowMap> shadowMaps = null;
if (!texturesDefault.TryGetValue(data.ShadowMap.Texture, out shadowMaps))
{
texturesVsm.TryGetValue(data.ShadowMap.Texture, out shadowMaps);
}
if (shadowMaps == null)
{
throw new Exception("Untracked shadow map texture");
}
shadowMaps.Remove(data.ShadowMap);
// if no more shadow maps on this texture, delete it.
if (shadowMaps.Count == 0)
{
InternalShadowMapTextures.Remove(data.ShadowMap.Texture);
Utilities.Dispose(ref data.ShadowMap.Texture.ShadowMapDepthBuffer);
Utilities.Dispose(ref data.ShadowMap.Texture.ShadowMapDepthTexture);
Utilities.Dispose(ref data.ShadowMap.Texture.ShadowMapRenderTarget);
Utilities.Dispose(ref data.ShadowMap.Texture.ShadowMapTargetTexture);
Utilities.Dispose(ref data.ShadowMap.Texture.IntermediateBlurRenderTarget);
Utilities.Dispose(ref data.ShadowMap.Texture.IntermediateBlurTexture);
if (!texturesDefault.Remove(data.ShadowMap.Texture))
{
texturesVsm.Remove(data.ShadowMap.Texture);
}
}
}
base.OnEntityRemoved(entity, data);
}
// returns shadow0 - shadow1
private static int CompareShadows(EntityLightShadow shadow0, EntityLightShadow shadow1)
{
var lightTypeComparaison = GetLightTypeValue(shadow0.Light.Type) - GetLightTypeValue(shadow1.Light.Type);
if (lightTypeComparaison != 0)
{
return(lightTypeComparaison);
}
var shadowMapSizeDiff = shadow0.Light.ShadowMapMaxSize - shadow1.Light.ShadowMapMaxSize;
if (shadowMapSizeDiff > 0)
{
return(-1);
}
if (shadowMapSizeDiff < 0)
{
return(1);
}
// TODO: more comparisons
return(0);
}
private void RemoveShadowMap(EntityLightShadow data)
{
InternalShadowMaps.Remove(data.ShadowMap);
InternalActiveShadowMaps.Remove(data.ShadowMap);
data.ShadowMap = null;
}