From 37e832cad5b81847a952136cf9c87ef55838b2a0 Mon Sep 17 00:00:00 2001
From: torcs-ng <torcs-ng@30fe4595-0a0c-4342-8851-515496e4dcbd>
Date: Sat, 25 May 2013 16:47:16 +0000
Subject: [PATCH] added first work on dynamic Shadow on Cars

git-svn-id: https://svn.code.sf.net/p/speed-dreams/code/trunk@5472 30fe4595-0a0c-4342-8851-515496e4dcbd

Former-commit-id: 4a05b90540e665f1226f039e6dc1a6f9653af414
Former-commit-id: 36a9f7a3a69e7c6caf6f1c8a0af9d3fdfbad07a5
---
 src/modules/graphic/osggraph/OsgCar.cpp    | 23 +++++++-------
 src/modules/graphic/osggraph/OsgRender.cpp | 36 +++++++++++++++-------
 src/modules/graphic/osggraph/OsgRender.h   |  2 ++
 3 files changed, 39 insertions(+), 22 deletions(-)

diff --git a/src/modules/graphic/osggraph/OsgCar.cpp b/src/modules/graphic/osggraph/OsgCar.cpp
index 5257e8eb3..92395efd2 100644
--- a/src/modules/graphic/osggraph/OsgCar.cpp
+++ b/src/modules/graphic/osggraph/OsgCar.cpp
@@ -307,7 +307,8 @@ SDCar::loadCar(tCarElt *car)
 
     this->car_root = new osg::Group;
     car_root->addChild(car_branch);
-    this->car_root->addChild(this->initOcclusionQuad(car));
+    if (SHADOW_TECHNIQUE == 0)
+        this->car_root->addChild(this->initOcclusionQuad(car));
 
     return this->car_root;
 }
@@ -422,18 +423,18 @@ void SDCar::updateCar()
 
 
     //ugly computation,
-    osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
-    for(uint i=0;i<shadowVertices->size();i++)
+    if (SHADOW_TECHNIQUE == 0)
     {
-        osg::Vec3 vtx = (*shadowVertices.get())[i];
-        osg::Vec4 vtx_world = osg::Vec4(vtx,1.0f)*mat;
-        vtx_world._v[2] = RtTrackHeightG(car->_trkPos.seg, vtx_world.x(), vtx_world.y()); //0.01 needed, we have to sort out why
-        vertices->push_back(osg::Vec3(vtx_world.x(), vtx_world.y(), vtx_world.z()));
-
+        osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
+        for(uint i=0;i<shadowVertices->size();i++)
+        {
+            osg::Vec3 vtx = (*shadowVertices.get())[i];
+            osg::Vec4 vtx_world = osg::Vec4(vtx,1.0f)*mat;
+            vtx_world._v[2] = RtTrackHeightG(car->_trkPos.seg, vtx_world.x(), vtx_world.y()); //0.01 needed, we have to sort out why
+            vertices->push_back(osg::Vec3(vtx_world.x(), vtx_world.y(), vtx_world.z()));
+        }
+        quad->setVertexArray(vertices);
     }
-    quad->setVertexArray(vertices);
-
-
 }
 
 void SDCar::updateShadingParameters(osg::Matrixf modelview){
diff --git a/src/modules/graphic/osggraph/OsgRender.cpp b/src/modules/graphic/osggraph/OsgRender.cpp
index 5308f2be8..8e207030d 100644
--- a/src/modules/graphic/osggraph/OsgRender.cpp
+++ b/src/modules/graphic/osggraph/OsgRender.cpp
@@ -30,7 +30,14 @@
 #include <osgViewer/Viewer>
 #include <osgParticle/PrecipitationEffect>
 #include <osgShadow/ShadowedScene>
-//#include <osgShadow/ViewDependentShadowMap>
+#include <osgShadow/ShadowVolume>
+#include <osgShadow/ShadowTexture>
+#include <osgShadow/ShadowMap>
+#include <osgShadow/SoftShadowMap>
+#include <osgShadow/ParallelSplitShadowMap>
+#include <osgShadow/LightSpacePerspectiveShadowMap>
+#include <osgShadow/StandardShadowMap>
+#include <osgShadow/ViewDependentShadowMap>
 #include <osgShadow/ShadowMap>
 
 #include "OsgMain.h"
@@ -433,21 +440,27 @@ void SDRender::Init(tTrack *track)
 
 void SDRender::ShadowedScene()
 {
-    /*osg::ref_ptr<osgShadow::ShadowMap> vdsm = new osgShadow::ShadowMap;
-    vdsm->setLight(sunLight.get());
-    vdsm->setTextureSize(osg::Vec2s(2048, 2048));
-    vdsm->setTextureUnit(3);
-    //shadowRoot = new osgShadow::ShadowedScene;
+    if (SHADOW_TECHNIQUE == 1)
+    {
+        osg::ref_ptr<osgShadow::ShadowMap> vdsm = new osgShadow::ShadowMap;
+        vdsm->setLight(sunLight.get());
+        vdsm->setTextureSize(osg::Vec2s(4096, 4096));
+        vdsm->setTextureUnit(1);
+        shadowRoot = new osgShadow::ShadowedScene;
+        osgShadow::ShadowSettings* settings = shadowRoot->getShadowSettings();
+        settings->setReceivesShadowTraversalMask(rcvShadowMask);
+        settings->setCastsShadowTraversalMask(castShadowMask);
+        shadowRoot->setShadowTechnique((vdsm.get()));
+    }
 
-    shadowRoot->setShadowTechnique((vdsm.get()));
-    shadowRoot->setReceivesShadowTraversalMask(rcvShadowMask);
-    shadowRoot->setCastsShadowTraversalMask(castShadowMask);
     shadowRoot->addChild(m_scene.get());
     shadowRoot->addChild(m_CarRoot.get());
     shadowRoot->addChild(sunLight.get());
+    shadowRoot->addChild(thesky->getCloudRoot());
 
+    m_RealRoot->removeChild(0, m_RealRoot->getNumChildren());
 
-    m_RealRoot->addChild(shadowRoot.get());*/
+    m_RealRoot->addChild(shadowRoot.get());
 }
 
 void SDRender::addCars(osg::Node* cars)
@@ -460,7 +473,8 @@ void SDRender::addCars(osg::Node* cars)
     optimizer.optimize(m_CarRoot.get());
     optimizer.optimize(m_scene.get());
 
-    //ShadowedScene();
+    if (SHADOW_TECHNIQUE > 0)
+        ShadowedScene();
 }
 
 void SDRender::UpdateLight( void )
diff --git a/src/modules/graphic/osggraph/OsgRender.h b/src/modules/graphic/osggraph/OsgRender.h
index d49c52f37..70c58efa4 100644
--- a/src/modules/graphic/osggraph/OsgRender.h
+++ b/src/modules/graphic/osggraph/OsgRender.h
@@ -26,6 +26,8 @@
 #include <track.h>	 //tTrack
 #include <raceman.h> // tSituation
 
+#define SHADOW_TECHNIQUE 0
+
 class SDSky;
 class SDScenery;