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App/v8kernel/Point.h

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+/* Copyright 2003-2006 ROBLOX Corporation, All Rights Reserved */
+
+#pragma once
+
+#include "V8Kernel/KernelIndex.h"
+#include "Util/G3DCore.h"
+
+namespace RBX {
+
+	class Body;
+
+
+	class Point 
+		: public KernelIndex
+	{
+		friend class KernelData;
+		friend class Kernel;
+	private:
+		int&					getKernelIndex() {return kernelIndex;}
+		int						numOwners;
+
+	protected:
+		Body*					body;
+
+		// constant
+		Vector3					localPos;
+
+
+
+
+
+		// auxillary variables, computed on every frame
+		Vector3					worldPos;
+
+		// accumulated quantities;
+		Vector3					force;
+
+		// This is private - only created by the kernel
+		Point(Body* _body = NULL);
+
+		virtual	~Point() 
+		{}
+
+	public:		// all points from same allocator, size of AttachPoint
+
+		static bool sameBodyAndOffset(const Point& p0, const Point& p1) {
+			return ((p0.body == p1.body) && (p0.localPos == p1.localPos));
+		}
+
+		//////////// called by kernel every step
+		//
+		// Updates World Position, Clears Accumulator
+
+		void step();
+
+		// force accumulation
+		void accumulateForce(const Vector3& _force)	{
+			force += _force;
+		}
+
+		// corresponds to "for each Point, accumulate forces to Body"
+		void forceToBody();
+
+		void setLocalPos(const Vector3& _localPos);
+		
+		void setWorldPos(const Vector3& _worldPos);
+		
+		void setBody(Body* _body) {
+			body = _body;
+		}
+
+		//////////// inquiry
+		Body* getBody() {
+			return body;
+		}
+
+		const Vector3& getWorldPos() {
+			return worldPos;
+		}
+	};
+
+} // namespace RBX
+