Differential D424 Diff 1755 ps/trunk/source/graphics/Camera.cpp

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ps/trunk/source/graphics/Camera.cpp

	/* Copyright (C) 2010 Wildfire Games.			/* Copyright (C) 2017 Wildfire Games.
	* This file is part of 0 A.D.			* This file is part of 0 A.D.
	*			*
	* 0 A.D. is free software: you can redistribute it and/or modify			* 0 A.D. is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by			* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 2 of the License, or			* the Free Software Foundation, either version 2 of the License, or
	* (at your option) any later version.			* (at your option) any later version.
	*			*
	* 0 A.D. is distributed in the hope that it will be useful,			* 0 A.D. is distributed in the hope that it will be useful,
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	}			}

	void CCamera::LookAt(const CVector3D& camera, const CVector3D& target, const CVector3D& up)			void CCamera::LookAt(const CVector3D& camera, const CVector3D& target, const CVector3D& up)
	{			{
	CVector3D delta = target - camera;			CVector3D delta = target - camera;
	LookAlong(camera, delta, up);			LookAlong(camera, delta, up);
	}			}

	void CCamera::LookAlong(CVector3D camera, CVector3D orientation, CVector3D up)			void CCamera::LookAlong(const CVector3D& camera, CVector3D orientation, CVector3D up)
	{			{
	orientation.Normalize();			orientation.Normalize();
	up.Normalize();			up.Normalize();
	CVector3D s = orientation.Cross(up);			CVector3D s = orientation.Cross(up);

	m_Orientation._11 = -s.X; m_Orientation._12 = up.X; m_Orientation._13 = orientation.X; m_Orientation._14 = camera.X;			m_Orientation._11 = -s.X; m_Orientation._12 = up.X; m_Orientation._13 = orientation.X; m_Orientation._14 = camera.X;
	m_Orientation._21 = -s.Y; m_Orientation._22 = up.Y; m_Orientation._23 = orientation.Y; m_Orientation._24 = camera.Y;			m_Orientation._21 = -s.Y; m_Orientation._22 = up.Y; m_Orientation._23 = orientation.Y; m_Orientation._24 = camera.Y;
	m_Orientation._31 = -s.Z; m_Orientation._32 = up.Z; m_Orientation._33 = orientation.Z; m_Orientation._34 = camera.Z;			m_Orientation._31 = -s.Z; m_Orientation._32 = up.Z; m_Orientation._33 = orientation.Z; m_Orientation._34 = camera.Z;
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