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328 lines
8.4 KiB
C++
328 lines
8.4 KiB
C++
// 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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//
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// Includes
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//
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#include <nel/misc/types_nl.h>
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#include <nel/misc/vector.h>
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#include <nel/misc/matrix.h>
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#include <nel/3d/u_material.h>
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#include <nel/3d/u_camera.h>
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#include <nel/3d/u_driver.h>
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#include <nel/3d/u_text_context.h>
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#include <nel/3d/u_texture.h>
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#include "camera.h"
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#include "landscape.h"
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#include "snowballs_client.h"
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#include "mouse_listener.h"
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//
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// Namespaces
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//
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using namespace NLMISC;
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using namespace NL3D;
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using namespace std;
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namespace SBCLIENT {
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/// If axis segment is longer than this value then no lens flare is displayed
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static const float _MaxLensFlareLenght = 0.4f;
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//
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// Functions
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//
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/**
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* A lens-flare class
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* \author Stephane Coutelas
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* \author Nevrax France
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* \date 2000
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*/
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class CLensFlare
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{
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float _AlphaCoef;
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/// flare
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struct _CFlare
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{
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NL3D::UMaterial Material;
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float Width;
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float Height;
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float Location;
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float Scale;
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_CFlare(NL3D::UTexture *texture, float width, float height, float location, float scale)
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{
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// -- -- nicely re-usable class, but why should it know about the snowballs specific driver global
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Material = Driver->createMaterial ();
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Material.initUnlit ();
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Material.setTexture (texture);
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Material.setBlendFunc (UMaterial::srcalpha, UMaterial::one);
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Material.setBlend(true);
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Material.setZFunc (UMaterial::always);
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Material.setZWrite (false);
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// quad dimension
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Width = width;
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Height = height;
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// location on the lens-flare ray
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Location = location;
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// texture scale
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Scale = scale;
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}
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~_CFlare()
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{
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Driver->deleteMaterial(Material);
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}
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};
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/// flares due to light
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std::vector<_CFlare *> _Flares;
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public:
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/// constructor
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CLensFlare()
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{
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_AlphaCoef = 1.0f;
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}
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~CLensFlare()
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{
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for (std::vector<_CFlare *>::iterator it(_Flares.begin()), end(_Flares.end()); it != end; ++it)
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delete (*it);
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_Flares.clear();
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}
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/// add a flare to the flare list
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void addFlare(NL3D::UTexture * texture, float width, float height, float location = 1.f, float scale = 1.f);
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void setAlphaCoef(float coef)
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{
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_AlphaCoef = coef;
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}
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// -- -- random note: show actually shows and is used within update
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/// lens flare display function
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void show();
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};
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/*********************************************************\
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addFlare()
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\*********************************************************/
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void CLensFlare::addFlare(UTexture * texture, float width, float height, float location, float scale)
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{
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_Flares.push_back(new _CFlare(texture, width, height, location, scale));
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}
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/*********************************************************\
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show()
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\*********************************************************/
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void CLensFlare::show()
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{
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CMatrix mtx;
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mtx.identity();
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nlassert(Driver!=NULL && !Camera.empty());
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Driver->setMatrixMode2D11 ();
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// Determining axis "screen center - light" vector
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CMatrix cameraMatrix = Camera.getMatrix();
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cameraMatrix.invert();
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CVector light = (-100000 * SunDirection);
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light = cameraMatrix * light;
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light = Camera.getFrustum().project(light);
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CVector screenCenter(0.5f,0.5f,0);
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CVector axis = light - screenCenter;
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if(axis.norm()>_MaxLensFlareLenght)
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{
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return;
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}
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// rendering flares
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vector<_CFlare *>::iterator itflr;
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for(itflr = _Flares.begin(); itflr!=_Flares.end(); itflr++)
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{
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(*itflr)->Material.setColor(CRGBA(255,255,255,(uint8)(_AlphaCoef*255)));
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CQuadUV quad;
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float xCenterQuad = screenCenter.x + (*itflr)->Location * axis.x;
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float yCenterQuad = screenCenter.y + (*itflr)->Location * axis.y;
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float x,y;
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x = xCenterQuad - (*itflr)->Width * (*itflr)->Scale / 2.f;
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y = yCenterQuad - (*itflr)->Height * (*itflr)->Scale / 2.f;
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quad.V0.set (x, y, 0);
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x = xCenterQuad + (*itflr)->Width * (*itflr)->Scale / 2.f;
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y = yCenterQuad - (*itflr)->Height * (*itflr)->Scale / 2.f;
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quad.V1.set (x, y, 0);
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x = xCenterQuad + (*itflr)->Width * (*itflr)->Scale / 2.f;
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y = yCenterQuad + (*itflr)->Height * (*itflr)->Scale / 2.f;
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quad.V2.set (x, y, 0);
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x = xCenterQuad - (*itflr)->Width * (*itflr)->Scale / 2.f;
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y = yCenterQuad + (*itflr)->Height * (*itflr)->Scale / 2.f;
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quad.V3.set (x, y, 0);
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quad.Uv0.U = 0.0f; quad.Uv0.V = 1.0f;
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quad.Uv1.U = 1.0f; quad.Uv1.V = 1.0f;
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quad.Uv2.U = 1.0f; quad.Uv2.V = 0.0f;
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quad.Uv3.U = 0.0f; quad.Uv3.V = 0.0f;
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Driver->drawQuad (quad, (*itflr)->Material);
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}
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}
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static CLensFlare *LensFlare = NULL;
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static UTextureFile *flareTexture1 = NULL;
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static UTextureFile *flareTexture3 = NULL;
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static UTextureFile *flareTexture4 = NULL;
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static UTextureFile *flareTexture5 = NULL;
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static UTextureFile *flareTexture6 = NULL;
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static UTextureFile *flareTexture7 = NULL;
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void initLensFlare ()
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{
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// -- -- getting this from a config file would be more re-usable
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LensFlare = new CLensFlare ();
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flareTexture1 = Driver->createTextureFile("flare01.tga");
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flareTexture3 = Driver->createTextureFile("flare03.tga");
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flareTexture4 = Driver->createTextureFile("flare04.tga");
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flareTexture5 = Driver->createTextureFile("flare05.tga");
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flareTexture6 = Driver->createTextureFile("flare06.tga");
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flareTexture7 = Driver->createTextureFile("flare07.tga");
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float w = 30/800.0f;
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float h = 30/600.0f;
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// shine
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LensFlare->addFlare (flareTexture3, w, h, 1.f, 16.f);
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LensFlare->addFlare (flareTexture1, w, h, 1.f, 6.f);
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LensFlare->addFlare (flareTexture6, w, h, 1.3f, 1.2f);
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LensFlare->addFlare (flareTexture7, w, h, 1.0f, 3.f);
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LensFlare->addFlare (flareTexture6, w, h, 0.5f, 4.f);
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LensFlare->addFlare (flareTexture5, w, h, 0.2f, 2.f);
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LensFlare->addFlare (flareTexture7, w, h, 0.0f, 0.8f);
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LensFlare->addFlare (flareTexture7, w, h, -0.25f, 2.f);
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LensFlare->addFlare (flareTexture1, w, h, -0.4f, 1.f);
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LensFlare->addFlare (flareTexture4, w, h, -1.0f, 12.f);
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LensFlare->addFlare (flareTexture5, w, h, -0.6f, 6.f);
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}
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void updateLensFlare ()
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{
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// -- -- todo: see how much of this can be modified to depend on nel
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// things only, and moved into the lensflare class
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// vector to sun
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//==============
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CVector userLook = MouseListener->getViewDirection ();
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CVector sunDirection = (-100000 * SunDirection);
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// cosinus between the two previous vectors
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//=========================================
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float cosAngle = sunDirection*userLook/sunDirection.norm();
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// alpha
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//======
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float alphaf;
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if(cosAngle<0)
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{
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alphaf = 0;
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}
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else
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{
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alphaf = 255*(float)(pow(cosAngle,20));
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}
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// landscape's masking sun ?
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//==========================
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CMatrix camMatrix;
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camMatrix = Camera.getMatrix();
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camMatrix.setPos(CVector::Null);
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camMatrix.invert();
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CVector tmp = camMatrix * sunDirection;
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tmp = Camera.getFrustum().project(tmp);
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uint32 w,h;
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Driver->getWindowSize(w,h);
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float sunRadius = 24; // -- -- why 24
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CRect rect((uint32)(tmp.x*w)-(uint32)sunRadius,(uint32)(tmp.y*h)-(uint32)sunRadius,2*(uint32)sunRadius,2*(uint32)sunRadius);
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vector<float> zbuff;
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Driver->getZBufferPart(zbuff, rect);
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float view = 0.f;
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float sum = 0;
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sint i; // -- -- signed?
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for(i=0; i<(sint)zbuff.size(); i++)
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{
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if(zbuff[i]>=0.99999f) sum ++;
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}
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view = sum/(sunRadius*2*sunRadius*2);
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Driver->setMatrixMode2D11 ();
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// quad for dazzle
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//================
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uint8 alpha = (uint8)(alphaf*view/2.0f);
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if(alpha!=0)
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{
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Driver->drawQuad(0,0,1,1,CRGBA(255,255,255,alpha));
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}
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// Display lens-flare
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LensFlare->setAlphaCoef( 1.f - (float)cos(alphaf*view*Pi/(2.f*255.f)) );
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LensFlare->show();
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}
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void releaseLensFlare ()
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{
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delete LensFlare; LensFlare = NULL;
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Driver->deleteTextureFile(flareTexture1); flareTexture1 = NULL;
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Driver->deleteTextureFile(flareTexture3); flareTexture3 = NULL;
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Driver->deleteTextureFile(flareTexture4); flareTexture4 = NULL;
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Driver->deleteTextureFile(flareTexture5); flareTexture5 = NULL;
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Driver->deleteTextureFile(flareTexture6); flareTexture6 = NULL;
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Driver->deleteTextureFile(flareTexture7); flareTexture7 = NULL;
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}
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} /* namespace SBCLIENT */
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/* end of file */
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