private void ClearPreviousMaterials()
{
foreach (var m in s_PrevMaskMaterials)
{
StencilMaterial.Remove(m);
}
s_PrevMaskMaterials.Clear();
foreach (var m in s_PrevModifiedMaterials)
{
ModifiedMaterial.Remove(m);
}
s_PrevModifiedMaterials.Clear();
}
private Material GetModifiedMaterial(Material baseMaterial, Texture2D texture)
{
if (0 < m_StencilValue)
{
baseMaterial = StencilMaterial.Add(baseMaterial, (1 << m_StencilValue) - 1, StencilOp.Keep, CompareFunction.Equal, ColorWriteMask.All, (1 << m_StencilValue) - 1, 0);
_maskMaterials.Add(baseMaterial);
}
if (texture == null && m_AnimatableProperties.Length == 0)
{
return(baseMaterial);
}
var id = m_AnimatableProperties.Length == 0 ? 0 : GetInstanceID();
baseMaterial = ModifiedMaterial.Add(baseMaterial, texture, id);
_modifiedMaterials.Add(baseMaterial);
return(baseMaterial);
}
protected override void UpdateMaterial()
{
// Clear mask materials.
s_PrevMaskMaterials.AddRange(_maskMaterials);
_maskMaterials.Clear();
// Clear modified materials.
s_PrevModifiedMaterials.AddRange(_modifiedMaterials);
_modifiedMaterials.Clear();
// Recalculate stencil value.
if (m_ShouldRecalculateStencil)
{
var rootCanvas = MaskUtilities.FindRootSortOverrideCanvas(transform);
m_StencilValue = maskable ? MaskUtilities.GetStencilDepth(transform, rootCanvas) : 0;
m_ShouldRecalculateStencil = false;
}
// No mesh to render.
var count = activeMeshIndices.CountFast();
if (count == 0 || !isActiveAndEnabled || particles.Count == 0)
{
canvasRenderer.Clear();
foreach (var m in s_PrevMaskMaterials)
{
StencilMaterial.Remove(m);
}
foreach (var m in s_PrevModifiedMaterials)
{
ModifiedMaterial.Remove(m);
}
return;
}
//
var materialCount = Mathf.Max(8, count);
canvasRenderer.materialCount = materialCount;
var j = 0;
for (var i = 0; i < particles.Count; i++)
{
if (materialCount <= j)
{
break;
}
var ps = particles[i];
if (!ps)
{
continue;
}
var r = ps.GetComponent <ParticleSystemRenderer>();
r.GetSharedMaterials(s_TempMaterials);
// Main
var index = i * 2;
if (activeMeshIndices.Count <= index)
{
break;
}
if (activeMeshIndices[index] && 0 < s_TempMaterials.Count)
{
var mat = GetModifiedMaterial(s_TempMaterials[0], ps.GetTextureForSprite());
canvasRenderer.SetMaterial(mat, j);
UpdateMaterialProperties(r, j);
j++;
}
// Trails
index++;
if (activeMeshIndices.Count <= index || materialCount <= j)
{
break;
}
if (activeMeshIndices[index] && 1 < s_TempMaterials.Count)
{
var mat = GetModifiedMaterial(s_TempMaterials[1], null);
canvasRenderer.SetMaterial(mat, j++);
}
}
foreach (var m in s_PrevMaskMaterials)
{
StencilMaterial.Remove(m);
}
foreach (var m in s_PrevModifiedMaterials)
{
ModifiedMaterial.Remove(m);
}
}
