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namespace UnityEngine.UI
{
internal class RectangularVertexClipper
{
readonly Vector3[] m_WorldCorners = new Vector3[4];
readonly Vector3[] m_CanvasCorners = new Vector3[4];
public Rect GetCanvasRect(RectTransform t, Canvas c)
{
if (c == null)
return new Rect();
t.GetWorldCorners(m_WorldCorners);
var canvasTransform = c.GetComponent<Transform>();
for (int i = 0; i < 4; ++i)
m_CanvasCorners[i] = canvasTransform.InverseTransformPoint(m_WorldCorners[i]);
return new Rect(m_CanvasCorners[0].x, m_CanvasCorners[0].y, m_CanvasCorners[2].x - m_CanvasCorners[0].x, m_CanvasCorners[2].y - m_CanvasCorners[0].y);
}
}
}
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