99 lines
2.1 KiB
C++
99 lines
2.1 KiB
C++
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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "std3d.h"
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#include "nel/3d/viewport.h"
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#include "nel/misc/common.h"
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using namespace NLMISC;
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namespace NL3D
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{
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CViewport::CViewport()
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{
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initFullScreen ();
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}
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void CViewport::init (float x, float y, float width, float height)
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{
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// Simply copy
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_X=x;
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clamp (_X, 0.f, 1.f);
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_Y=y;
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clamp (_Y, 0.f, 1.f);
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_Width=width;
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clamp (_Width, 0.f, 1.f-_X);
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_Height=height;
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clamp (_Height, 0.f, 1.f-_Y);
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}
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void CViewport::initFullScreen ()
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{
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// Very easy
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_X=0.f;
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_Y=0.f;
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_Width=1.f;
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_Height=1.f;
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}
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void CViewport::init16_9 ()
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{
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// Very easy
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_X=0.f;
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_Y=(1.f-0.75f)/2;
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_Width=1.f;
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_Height=0.75f;
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}
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void CViewport::getRayWithPoint (float x, float y, CVector& pos, CVector& dir, const CMatrix& camMatrix, const CFrustum& camFrust) const
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{
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float xVP=(x-_X)/_Width;
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float yVP=(y-_Y)/_Height;
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// Pos of the ray
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pos= camMatrix.getPos();
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// Get camera frustrum
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float left;
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float right;
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float bottom;
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float top;
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float znear;
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float zfar;
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camFrust.getValues (left, right, bottom, top, znear, zfar);
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// Get a local direction
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dir.x=left+(right-left)*xVP;
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dir.y=znear;
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dir.z=bottom+(top-bottom)*yVP;
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// Get a world direction
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CMatrix mat=camMatrix;
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mat.setPos (CVector (0,0,0));
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dir=mat*dir;
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}
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} // NL3D
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