GEEKING

App/util/Rect.cpp

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+/* Copyright 2003-2005 ROBLOX Corporation, All Rights Reserved */
+#include "stdafx.h"
+
+#include "Util/Rect.h"
+#include "rbx/Debug.h"
+
+namespace RBX {
+
+const float Rect::BORDER_RATIO = 0.15f;			// 0.0 to 1.0;
+const float Rect::BORDER_RATIO_DRAG = 0.08f;		// 0.0 to 1.0;
+const float Rect::BORDER_RATIO_THIN = 0.02f;		// 0.0 to 1.0;
+
+Rect::Location Rect::pointInBorder(const G3D::Vector2& point, 
+									 float borderRatio)
+{
+	G3D::Vector2 delta = high * borderRatio;
+
+	if (point.x < delta.x)				return LEFT;
+	if (point.x > (high.x - delta.x))	return RIGHT;
+	if (point.y < delta.y)				return TOP;
+	if (point.y > (high.y - delta.y))	return BOTTOM;
+
+	return NONE;
+}
+
+void Rect::unionWith(const Rect& other)
+{
+	low.x = G3D::min(low.x, other.low.x);
+	low.y = G3D::min(low.y, other.low.y);
+	high.x = G3D::max(high.x, other.high.x);
+	high.y = G3D::max(high.y, other.high.y);
+}
+
+
+Vector2 Rect::positionPoint(Location xLocation, Location yLocation) const
+{
+	Vector2 answer = center();
+
+	switch (xLocation)
+	{
+	case CENTER:	break;
+	case LEFT:		answer.x = low.x; break;
+	case RIGHT:		answer.x = high.x; break;
+	default:		RBXASSERT(0);	break;
+	}	
+
+	switch (yLocation)
+	{
+	case CENTER:	break;
+	case TOP:		answer.y = low.y; break;
+	case BOTTOM:	answer.y = high.y; break;
+	default:		RBXASSERT(0);	break;
+	}	
+
+	return answer;
+}
+
+
+Vector2 Rect::positionPoint(const Vector2& point, Location xLocation, Location yLocation) const
+{
+	Vector2 answer;
+
+	switch (xLocation)
+	{
+	case LEFT:		answer.x = low.x + point.x; break;
+	case RIGHT:		answer.x = high.x - point.x; break;
+	default:		RBXASSERT(0);	break;
+	}	
+
+	switch (yLocation)
+	{
+	case TOP:		answer.y = low.y + point.y; break;
+	case BOTTOM:	answer.y = high.y - point.y; break;
+	default:		RBXASSERT(0);	break;
+	}	
+
+	return answer;
+}
+
+
+Rect Rect::positionChild(const Rect& child, Location xLocation, Location yLocation) const
+{
+	Vector2 answer;
+	Vector2 childSize = child.size();
+
+	switch (xLocation)
+	{
+		case LEFT:		answer.x = low.x; break;
+		case CENTER:	answer.x = 0.5f * (high.x - childSize.x); break;
+		case RIGHT:		answer.x = high.x - childSize.x; break;
+		default:		RBXASSERT(0);	break;
+	}	
+
+	switch (yLocation)
+	{
+		case TOP:		answer.y = low.y; break;
+		case CENTER:	answer.y = 0.5f * (high.y - childSize.y); break;
+		case BOTTOM:	answer.y = high.y - childSize.y; break;
+		default:		RBXASSERT(0);	break;
+	}	
+	return Rect(answer, answer + childSize);
+}
+
+} // namespace