public static void CalcPanelNDCRect(RectTransform rc, OffsetCalcMode modeX, OffsetCalcMode modeY, ref Rect outRect)
{
if (rc == null)
{
Debug.LogError("RecTransform component required to calculate NDC rect.");
return;
}
outRect.Set(0.0f, 0.0f, 0.0f, 0.0f);
RectTransform rcParent = rc.parent != null?rc.parent.GetComponent <RectTransform> () : null;
if (rc == null || rcParent == null)
{
Debug.LogError("Can not run transition on component with no RectTransform or parent object.");
return;
}
Vector2 dim = Vector2.zero;
Utils.CalcRectTransformDimensions(rc, ref dim);
Vector2 parentDim = Vector2.zero;
Utils.CalcRectTransformDimensions(rcParent, ref parentDim);
float normalizedMarginX = CalcNDCMargin(modeX, dim.x, parentDim.x); // modeX == OffsetCalcMode.Centered ? (1.0f-(dim.x/parentDim.x))*0.5f : 1.0f;
float offsetMinX = (normalizedMarginX - 0 /*rc.anchorMin.x*/) * dim.x;
float offsetMaxX = (normalizedMarginX - 1 /*rc.anchorMax.x*/) * dim.x + dim.x;
float normalizedMarginY = CalcNDCMargin(modeY, dim.y, parentDim.y); //modeY == OffsetCalcMode.Centered ? (1.0f-(dim.y/parentDim.y))*0.5f : 1.0f;
float offsetMinY = (normalizedMarginY - 0 /*rc.anchorMin.y*/) * dim.y;
float offsetMaxY = (normalizedMarginY - 1 /*rc.anchorMax.y*/) * dim.y + dim.y;
outRect.xMin = offsetMinX;
outRect.yMin = offsetMinY;
outRect.xMax = offsetMaxX;
outRect.yMax = offsetMaxY;
}
private static float CalcNDCMargin(OffsetCalcMode mode, float dim, float parentDim)
{
dim = parentDim = 1;
float margin = 0.0f;
switch (mode)
{
case OffsetCalcMode.Centered:
margin = (1.0f - (dim / parentDim)) * 0.5f;
break;
case OffsetCalcMode.ScreenRight:
case OffsetCalcMode.ScreenTop:
margin = 1.0f;
break;
case OffsetCalcMode.ScreenLeft:
case OffsetCalcMode.ScreenBottom:
margin = -1.0f;
break;
}
return(margin);
}
