public static Rect FindCullAndClipWorldRect(List <RectMask2D> rectMaskParents, out bool validRect)
{
Rect result;
if (rectMaskParents.Count == 0)
{
validRect = false;
result = default(Rect);
}
else
{
Rect a = rectMaskParents[0].canvasRect;
for (int i = 0; i < rectMaskParents.Count; i++)
{
a = Clipping.RectIntersect(a, rectMaskParents[i].canvasRect);
}
bool flag = a.width <= 0f || a.height <= 0f;
if (flag)
{
validRect = false;
result = default(Rect);
}
else
{
Vector3 vector = new Vector3(a.x, a.y, 0f);
Vector3 vector2 = new Vector3(a.x + a.width, a.y + a.height, 0f);
validRect = true;
result = new Rect(vector.x, vector.y, vector2.x - vector.x, vector2.y - vector.y);
}
}
return(result);
}
/// <summary>
/// 进行裁剪
/// </summary>
public virtual void PerformClipping()
{
// if the parents are changed
// or something similar we
// do a recalculate here
//重新计算物体的裁剪组件
if (m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, m_Clippers);
m_ShouldRecalculateClipRects = false;
}
// get the compound rects from
// the clippers that are valid
bool validRect = true;
Rect clipRect = Clipping.FindCullAndClipWorldRect(m_Clippers, out validRect);
if (clipRect != m_LastClipRectCanvasSpace)
{
for (int i = 0; i < m_ClipTargets.Count; ++i)
{
m_ClipTargets[i].SetClipRect(clipRect, validRect);
}
m_LastClipRectCanvasSpace = clipRect;
m_LastClipRectValid = validRect;
}
for (int i = 0; i < m_ClipTargets.Count; ++i)
{
m_ClipTargets[i].Cull(m_LastClipRectCanvasSpace, m_LastClipRectValid);
}
}
public virtual void PerformClipping()
{
if (this.m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, this.m_Clippers);
this.m_ShouldRecalculateClipRects = false;
}
bool flag = true;
Rect rect = Clipping.FindCullAndClipWorldRect(this.m_Clippers, out flag);
bool flag2 = rect != this.m_LastClipRectCanvasSpace;
if (flag2 || this.m_ForceClip)
{
foreach (IClippable current in this.m_ClipTargets)
{
current.SetClipRect(rect, flag);
}
this.m_LastClipRectCanvasSpace = rect;
this.m_LastValidClipRect = flag;
}
foreach (IClippable current2 in this.m_ClipTargets)
{
MaskableGraphic maskableGraphic = current2 as MaskableGraphic;
if (!(maskableGraphic != null) || maskableGraphic.canvasRenderer.hasMoved || flag2)
{
current2.Cull(this.m_LastClipRectCanvasSpace, this.m_LastValidClipRect);
}
}
}
public virtual void PerformClipping()
{
if (m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, m_Clippers);
m_ShouldRecalculateClipRects = false;
}
bool validRect = true;
Rect rect = Clipping.FindCullAndClipWorldRect(m_Clippers, out validRect);
bool flag = rect != m_LastClipRectCanvasSpace;
if (flag || m_ForceClip)
{
foreach (IClippable clipTarget in m_ClipTargets)
{
clipTarget.SetClipRect(rect, validRect);
}
m_LastClipRectCanvasSpace = rect;
m_LastValidClipRect = validRect;
}
foreach (IClippable clipTarget2 in m_ClipTargets)
{
MaskableGraphic maskableGraphic = clipTarget2 as MaskableGraphic;
if (!(maskableGraphic != null) || maskableGraphic.canvasRenderer.hasMoved || flag)
{
clipTarget2.Cull(m_LastClipRectCanvasSpace, m_LastValidClipRect);
}
}
}
public virtual void PerformClipping()
{
if (ReferenceEquals(Canvas, null))
{
return;
}
//TODO See if an IsActive() test would work well here or whether it might cause unexpected side effects (re case 776771)
// if the parents are changed
// or something similar we
// do a recalculate here
if (m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, m_Clippers);
m_ShouldRecalculateClipRects = false;
}
// get the compound rects from
// the clippers that are valid
bool validRect = true;
Rect clipRect = Clipping.FindCullAndClipWorldRect(m_Clippers, out validRect);
// If the mask is in ScreenSpaceOverlay/Camera render mode, its content is only rendered when its rect
// overlaps that of the root canvas.
RenderMode renderMode = Canvas.rootCanvas.renderMode;
bool maskIsCulled =
(renderMode == RenderMode.ScreenSpaceCamera || renderMode == RenderMode.ScreenSpaceOverlay) &&
!clipRect.Overlaps(rootCanvasRect, true);
// 和上次裁剪的矩形比较是否改变
bool clipRectChanged = clipRect != m_LastClipRectCanvasSpace;
bool forceClip = m_ForceClip;
// Avoid looping multiple times.
foreach (IClippable clipTarget in m_ClipTargets)
{
if (clipRectChanged || forceClip)
{
//设置矩形裁剪框,若无效则禁用
clipTarget.SetClipRect(clipRect, validRect);
}
var maskable = clipTarget as MaskableGraphic;
if (maskable != null && !maskable.canvasRenderer.hasMoved && !clipRectChanged)
{
continue;
}
// Children are only displayed when inside the mask. If the mask is culled, then the children
// inside the mask are also culled. In that situation, we pass an invalid rect to allow callees
// to avoid some processing.
clipTarget.Cull(
maskIsCulled ? Rect.zero : clipRect,
maskIsCulled ? false : validRect);
}
m_LastClipRectCanvasSpace = clipRect;
m_ForceClip = false;
}
public void PerformClipping()
{
if (m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMaskForClip(this, m_Clippers);
m_ShouldRecalculateClipRects = false;
}
bool validRect = true;
Rect clipRect = Clipping.FindCullAndClipWorldRect(m_Clippers, out validRect);
bool clipRectChanged = clipRect != m_LastClipRectCanvasSpace;
if (clipRectChanged || m_ForceClip)
{
foreach (var clipTarget in m_ClipTargets)
{
clipTarget.SetClipRect(clipRect, validRect);
}
m_LastClipRectCanvasSpace = clipRect;
m_LastValidClipRect = validRect;
}
foreach (var clipTarget in m_ClipTargets)
{
var maskable = clipTarget as MaskableGraphic;
if (maskable != null && !maskable.canvasRenderer.hasMoved && !clipRectChanged)
{
continue;
}
clipTarget.Cull(m_LastClipRectCanvasSpace, m_LastValidClipRect);
}
}
public virtual void PerformClipping()
{
//TODO See if an IsActive() test would work well here or whether it might cause unexpected side effects (re case 776771)
// if the parents are changed
// or something similar we
// do a recalculate here
if (m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, m_Clippers);
m_ShouldRecalculateClipRects = false;
}
// get the compound rects from
// the clippers that are valid
bool validRect = true;
Rect clipRect = Clipping.FindCullAndClipWorldRect(m_Clippers, out validRect);
if (clipRect != m_LastClipRectCanvasSpace || m_ForceClip)
{
foreach (IClippable clipTarget in m_ClipTargets)
{
clipTarget.SetClipRect(clipRect, validRect);
}
m_LastClipRectCanvasSpace = clipRect;
m_LastValidClipRect = validRect;
}
foreach (IClippable clipTarget in m_ClipTargets)
{
clipTarget.Cull(m_LastClipRectCanvasSpace, m_LastValidClipRect);
}
}
public virtual void PerformClipping()
{
if (!object.ReferenceEquals(this.Canvas, null))
{
if (this.m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, this.m_Clippers);
this.m_ShouldRecalculateClipRects = false;
}
bool flag = true;
Rect rect = Clipping.FindCullAndClipWorldRect(this.m_Clippers, out flag);
RenderMode renderMode = this.Canvas.rootCanvas.renderMode;
bool flag2 = (renderMode == RenderMode.ScreenSpaceCamera || renderMode == RenderMode.ScreenSpaceOverlay) && !rect.Overlaps(this.rootCanvasRect, true);
bool flag3 = rect != this.m_LastClipRectCanvasSpace;
bool forceClip = this.m_ForceClip;
foreach (IClippable clippable in this.m_ClipTargets)
{
if (flag3 || forceClip)
{
clippable.SetClipRect(rect, flag);
}
MaskableGraphic maskableGraphic = clippable as MaskableGraphic;
if (!(maskableGraphic != null) || maskableGraphic.canvasRenderer.hasMoved || flag3)
{
clippable.Cull((!flag2) ? rect : Rect.zero, !flag2 && flag);
}
}
this.m_LastClipRectCanvasSpace = rect;
this.m_ForceClip = false;
}
}
public static Rect FindCullAndClipWorldRect(List <RectMask2D> rectMaskParents, out bool validRect)
{
if (rectMaskParents.Count == 0)
{
validRect = false;
return(new Rect());
}
Rect a = rectMaskParents[0].canvasRect;
for (int index = 0; index < rectMaskParents.Count; ++index)
{
a = Clipping.RectIntersect(a, rectMaskParents[index].canvasRect);
}
if ((double)a.width <= 0.0 || (double)a.height <= 0.0)
{
validRect = false;
return(new Rect());
}
Vector3 vector3_1 = new Vector3(a.x, a.y, 0.0f);
Vector3 vector3_2 = new Vector3(a.x + a.width, a.y + a.height, 0.0f);
validRect = true;
return(new Rect(vector3_1.x, vector3_1.y, vector3_2.x - vector3_1.x, vector3_2.y - vector3_1.y));
}
/// <summary>
/// <para>See: IClipper.PerformClipping.</para>
/// </summary>
public virtual void PerformClipping()
{
if (this.m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, this.m_Clippers);
this.m_ShouldRecalculateClipRects = false;
}
bool validRect = true;
Rect rect = Clipping.FindCullAndClipWorldRect(this.m_Clippers, out validRect);
if ((rect != this.m_LastClipRectCanvasSpace) || this.m_ForceClip)
{
foreach (IClippable clippable in this.m_ClipTargets)
{
clippable.SetClipRect(rect, validRect);
}
this.m_LastClipRectCanvasSpace = rect;
this.m_LastValidClipRect = validRect;
}
foreach (IClippable clippable2 in this.m_ClipTargets)
{
clippable2.Cull(this.m_LastClipRectCanvasSpace, this.m_LastValidClipRect);
}
}
/// <summary>
///
/// <para>
/// See: IClipper.PerformClipping.
/// </para>
///
/// </summary>
public virtual void PerformClipping()
{
if (this.m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, this.m_Clippers);
this.m_ShouldRecalculateClipRects = false;
}
bool validRect = true;
Rect andClipWorldRect = Clipping.FindCullAndClipWorldRect(this.m_Clippers, out validRect);
if (andClipWorldRect != this.m_LastClipRectCanvasSpace)
{
for (int index = 0; index < this.m_ClipTargets.Count; ++index)
{
this.m_ClipTargets[index].SetClipRect(andClipWorldRect, validRect);
}
this.m_LastClipRectCanvasSpace = andClipWorldRect;
this.m_LastClipRectValid = validRect;
}
for (int index = 0; index < this.m_ClipTargets.Count; ++index)
{
this.m_ClipTargets[index].Cull(this.m_LastClipRectCanvasSpace, this.m_LastClipRectValid);
}
}
public virtual void PerformClipping()
{
if (m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, m_Clippers);
m_ShouldRecalculateClipRects = false;
}
bool validRect = true;
Rect rect = Clipping.FindCullAndClipWorldRect(m_Clippers, out validRect);
if (rect != m_LastClipRectCanvasSpace)
{
for (int i = 0; i < m_ClipTargets.Count; i++)
{
m_ClipTargets[i].SetClipRect(rect, validRect);
}
m_LastClipRectCanvasSpace = rect;
m_LastClipRectValid = validRect;
}
for (int j = 0; j < m_ClipTargets.Count; j++)
{
m_ClipTargets[j].Cull(m_LastClipRectCanvasSpace, m_LastClipRectValid);
}
}
public virtual void PerformClipping()
{
if (ReferenceEquals(Canvas, null))
{
return;
}
//TODO See if an IsActive() test would work well here or whether it might cause unexpected side effects (re case 776771)
// if the parents are changed
// or something similar we
// do a recalculate here
// 重新计算裁切区域
if (m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, m_Clippers);
m_ShouldRecalculateClipRects = false;
}
// get the compound rects from
// the clippers that are valid
//由于裁切可能有多个区域，这里会计算出正确包含重复的一个区域
bool validRect = true;
Rect clipRect = Clipping.FindCullAndClipWorldRect(m_Clippers, out validRect);
// If the mask is in ScreenSpaceOverlay/Camera render mode, its content is only rendered when its rect
// overlaps that of the root canvas.
RenderMode renderMode = Canvas.rootCanvas.renderMode;
bool maskIsCulled =
(renderMode == RenderMode.ScreenSpaceCamera || renderMode == RenderMode.ScreenSpaceOverlay) &&
!clipRect.Overlaps(rootCanvasRect, true);
if (maskIsCulled)
{
// Children are only displayed when inside the mask. If the mask is culled, then the children
// inside the mask are also culled. In that situation, we pass an invalid rect to allow callees
// to avoid some processing.
clipRect = Rect.zero;
validRect = false;
}
if (clipRect != m_LastClipRectCanvasSpace)
{
foreach (IClippable clipTarget in m_ClipTargets)
{
clipTarget.SetClipRect(clipRect, validRect);
}
foreach (MaskableGraphic maskableTarget in m_MaskableTargets)
{
maskableTarget.SetClipRect(clipRect, validRect);
maskableTarget.Cull(clipRect, validRect);
}
}
else if (m_ForceClip)
{
foreach (IClippable clipTarget in m_ClipTargets)
{
clipTarget.SetClipRect(clipRect, validRect);
}
foreach (MaskableGraphic maskableTarget in m_MaskableTargets)
{
//准备把裁切区域传到每个UI元素的Shader中
maskableTarget.SetClipRect(clipRect, validRect);
if (maskableTarget.canvasRenderer.hasMoved)
{
//准备开始裁切，准备重建裁切的UI
maskableTarget.Cull(clipRect, validRect);
}
}
}
else
{
foreach (MaskableGraphic maskableTarget in m_MaskableTargets)
{
if (maskableTarget.canvasRenderer.hasMoved)
{
maskableTarget.Cull(clipRect, validRect);
}
}
}
m_LastClipRectCanvasSpace = clipRect;
m_ForceClip = false;
}
/// <summary>
/// 19/6 2020 Graphic学习
/// 对子类元素进行剔除和裁剪处理
/// </summary>
public virtual void PerformClipping()
{
if (ReferenceEquals(Canvas, null))
{
return;
}
//TODO See if an IsActive() test would work well here or whether it might cause unexpected side effects (re case 776771)
// if the parents are changed
// or something similar we
// do a recalculate here
//当父节点发生改变的时候，或者OnHierarchyCanvasChanged以及添加裁剪或者移除裁剪子类元素的时候
//重新对裁剪的rect进行计算
if (m_ShouldRecalculateClipRects)
{
MaskUtilities.GetRectMasksForClip(this, m_Clippers);
m_ShouldRecalculateClipRects = false;
}
// get the compound rects from
// the clippers that are valid
bool validRect = true;
Rect clipRect = Clipping.FindCullAndClipWorldRect(m_Clippers, out validRect);
// If the mask is in ScreenSpaceOverlay/Camera render mode, its content is only rendered when its rect
// overlaps that of the root canvas.
//这一步是为了剔除子类元素
RenderMode renderMode = Canvas.rootCanvas.renderMode;
//如果Canvas的渲染模式ScreenSpaceCamera或者 ScreenSpaceOverlay时，需要裁剪的cliprect与根节点Canvas的rect没有重叠
//则进行剔除
//这里好像判断是mask是否被剔除了
bool maskIsCulled =
(renderMode == RenderMode.ScreenSpaceCamera || renderMode == RenderMode.ScreenSpaceOverlay) &&
!clipRect.Overlaps(rootCanvasRect, true);
//裁剪区域发生改变
bool clipRectChanged = clipRect != m_LastClipRectCanvasSpace;
//是否裁剪的子元素发生变化
//添加裁剪子元素或者移除时，都为true
bool forceClip = m_ForceClip;
// Avoid looping multiple times.
foreach (IClippable clipTarget in m_ClipTargets)
{
if (clipRectChanged || forceClip)
{
clipTarget.SetClipRect(clipRect, validRect);
}
var maskable = clipTarget as MaskableGraphic;
if (maskable != null && !maskable.canvasRenderer.hasMoved && !clipRectChanged)
{
continue;
}
// Children are only displayed when inside the mask. If the mask is culled, then the children
// inside the mask are also culled. In that situation, we pass an invalid rect to allow callees
// to avoid some processing.
clipTarget.Cull(
maskIsCulled ? Rect.zero : clipRect,
maskIsCulled ? false : validRect);
}
m_LastClipRectCanvasSpace = clipRect;
m_ForceClip = false;
}