mirror of
https://port.numenaute.org/aleajactaest/khanat-opennel-code.git
synced 2024-11-15 03:59:06 +00:00
98 lines
2 KiB
C++
98 lines
2 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
|
|
// Copyright (C) 2010 Winch Gate Property Limited
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as
|
|
// published by the Free Software Foundation, either version 3 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
#include "std3d.h"
|
|
|
|
#include "nel/3d/viewport.h"
|
|
#include "nel/misc/common.h"
|
|
|
|
using namespace NLMISC;
|
|
|
|
|
|
namespace NL3D
|
|
{
|
|
|
|
CViewport::CViewport()
|
|
{
|
|
initFullScreen ();
|
|
}
|
|
|
|
|
|
void CViewport::init (float x, float y, float width, float height)
|
|
{
|
|
// Simply copy
|
|
_X=x;
|
|
clamp (_X, 0.f, 1.f);
|
|
_Y=y;
|
|
clamp (_Y, 0.f, 1.f);
|
|
_Width=width;
|
|
clamp (_Width, 0.f, 1.f-_X);
|
|
_Height=height;
|
|
clamp (_Height, 0.f, 1.f-_Y);
|
|
}
|
|
|
|
|
|
void CViewport::initFullScreen ()
|
|
{
|
|
// Very easy
|
|
_X=0.f;
|
|
_Y=0.f;
|
|
_Width=1.f;
|
|
_Height=1.f;
|
|
}
|
|
|
|
|
|
void CViewport::init16_9 ()
|
|
{
|
|
// Very easy
|
|
_X=0.f;
|
|
_Y=(1.f-0.75f)/2;
|
|
_Width=1.f;
|
|
_Height=0.75f;
|
|
}
|
|
|
|
|
|
void CViewport::getRayWithPoint (float x, float y, CVector& pos, CVector& dir, const CMatrix& camMatrix, const CFrustum& camFrust) const
|
|
{
|
|
float xVP=(x-_X)/_Width;
|
|
float yVP=(y-_Y)/_Height;
|
|
|
|
// Pos of the ray
|
|
pos= camMatrix.getPos();
|
|
|
|
// Get camera frustrum
|
|
float left;
|
|
float right;
|
|
float bottom;
|
|
float top;
|
|
float znear;
|
|
float zfar;
|
|
camFrust.getValues (left, right, bottom, top, znear, zfar);
|
|
|
|
// Get a local direction
|
|
dir.x=left+(right-left)*xVP;
|
|
dir.y=znear;
|
|
dir.z=bottom+(top-bottom)*yVP;
|
|
|
|
// Get a world direction
|
|
CMatrix mat=camMatrix;
|
|
mat.setPos (CVector (0,0,0));
|
|
dir=mat*dir;
|
|
}
|
|
|
|
|
|
} // NL3D
|
|
|