From 3001809bc3fd679268426e02945195fb9addab8f Mon Sep 17 00:00:00 2001
From: Christian Schmitt <chris@ilovelinux.de>
Date: Tue, 28 Aug 2012 12:59:33 +0200
Subject: [PATCH] Remove unused source files

---
 simgear/scene/model/shadowvolume.cxx | 998 ---------------------------
 simgear/scene/model/shadowvolume.hxx | 146 ----
 2 files changed, 1144 deletions(-)
 delete mode 100644 simgear/scene/model/shadowvolume.cxx
 delete mode 100644 simgear/scene/model/shadowvolume.hxx

diff --git a/simgear/scene/model/shadowvolume.cxx b/simgear/scene/model/shadowvolume.cxx
deleted file mode 100644
index 88c652d5..00000000
--- a/simgear/scene/model/shadowvolume.cxx
+++ /dev/null
@@ -1,998 +0,0 @@
-// Shadow volume class
-//
-// Written by Harald JOHNSEN, started June 2005.
-//
-// Copyright (C) 2005  Harald JOHNSEN - hjohnsen@evc.net
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License as
-// published by the Free Software Foundation; either version 2 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
-// General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-//
-//
-
-#ifdef HAVE_CONFIG_H
-#  include <simgear_config.h>
-#endif
-
-#include <plib/sg.h>
-#include <simgear/debug/logstream.hxx>
-#include <simgear/screen/extensions.hxx>
-#include <simgear/scene/model/animation.hxx>
-#include <simgear/scene/model/model.hxx>
-#include <simgear/environment/visual_enviro.hxx>
-#include <osg/GLU>
-
-#include "shadowvolume.hxx"
-
-/*
- geometry and edge list
- - traverse object graph until leaf to get geometry
- - what about transform and selection ?
-	- use sub objects rather then objects
-	- get local transform and selection
-		- range anim : ssgRangeSelector ( min, max ) => ssgSelector ( true/false )
-			=> selection [0..n], kids [0..n]
-		- select/timed anim : ssgSelector ( true/false )
-			=> isSelected( nkid )
-		- spin/rotate/trans/scale/... : ssgTransform ( matrix )
-			=> getNetTransform
- - on new object :
-	- for one object branch
-		- for each leaf
-			- save geometry
-			- save address in cache
- - when rendering object
-	- for each leaf
-		- getNetTransform + object global rotation (ac) => transform for light position
-		- go up in tree and check isSelected( self )
- - generate connectivity each time the geometry change
-	=> using local light so connectivity never changes
- - generate active edge list when :
-	- light moves
-	- subpart moves (animation code)
-	- ac rotate
-		=> cache rotation matrix and generate edge list only if something change
-		=> even if it changes, no need to do that every frame
-
- - static objects have static edge list if light does not move
-
- shadowing a scene
- - render full scene as normal
- - render occluder in stencil buffer with their shadow volumes
- - apply stencil to framebuffer (darkens shadowed parts)
-
-	shadows using the alpha buffer
-	http://wwwvis.informatik.uni-stuttgart.de/~roettger/html/Pages/shadows.html
-*/
-
-// TODO
-//	- shadow for objects
-//		* aircraft
-//		* tile objects (from .stg)
-//		- ai objects
-//		- random objects => tie shadow geometry to lib objects and reuse them
-//	- zfail if camera inside shadow
-//	- queue geometry work if lot of objects
-//	* add a render property on/off (for aircraft, for scene objects, for ai)
-//	* add a render property in rendering dialog
-//	* filter : halo, light, shadow, disc, disk, flame, (exhaust), noshadow
-
-static int statSilhouette=0;
-static int statGeom=0;
-static int statObj=0;
-
-static SGShadowVolume *states;
-static glBlendEquationProc glBlendEquationPtr = NULL;
-#define GL_MIN_EXT                          0x8007
-#define GL_MAX_EXT                          0x8008
-
-
-SGShadowVolume::ShadowCaster::ShadowCaster( int _num_tri, ssgBranch * _geometry_leaf ) : 
-	geometry_leaf ( _geometry_leaf ),
-	scenery_object ( 0 ),
-	first_select ( 0 ),
-	frameNumber ( 0 ),
-	indices ( 0 ),
-	numTriangles ( 0 ),
-	vertices ( 0 ),
-	lastSilhouetteIndicesCount ( 0 )
-{
-	int num_tri = _num_tri;
-	numTriangles = num_tri;
-	triangles = new triData[ num_tri ];
-	indices = new int[1 + num_tri * 3];
-	vertices = new sgVec4[1 + num_tri * 3];
-	silhouetteEdgeIndices = new GLushort[(1+num_tri) * 3*3];
-	indices [ num_tri * 3 ] = num_tri * 3;
-	sgSetVec3(last_lightpos, 0.0, 0.0, 0.0);
-	statGeom ++;
-
-	ssgBranch *branch = (ssgBranch *) _geometry_leaf;
-	while( branch && branch->getNumParents() > 0 ) {
-		if( branch->isAKindOf(ssgTypeSelector())) {
-			first_select = branch;
-			break;
-		}
-		if( sgCheckAnimationBranch( (ssgEntity *) branch ) )
-			if( ((SGAnimation *) branch->getUserData())->get_animation_type() == 1) {
-				first_select = branch;
-				break;
-			}
-		branch = branch->getParent(0);
-	}
-}
-
-void SGShadowVolume::ShadowCaster::addLeaf( int & tri_idx, int & ind_idx, ssgLeaf *geometry_leaf ) {
-	int num_tri = geometry_leaf->getNumTriangles();
-	for(int i = 0; i < num_tri ; i ++ ) {
-		short v1, v2, v3;
-		sgVec3 a, b, c;
-		geometry_leaf->getTriangle( i, &v1, &v2, &v3 );
-		sgCopyVec3(a, geometry_leaf->getVertex(v1));
-		sgCopyVec3(b, geometry_leaf->getVertex(v2));
-		sgCopyVec3(c, geometry_leaf->getVertex(v3));
-
-		int p = tri_idx;
-		sgMakePlane ( triangles[p].planeEquations, a, b, c );
-		sgCopyVec3(vertices[ind_idx + v1], a);
-		sgCopyVec3(vertices[ind_idx + v2], b);
-		sgCopyVec3(vertices[ind_idx + v3], c);
-		vertices[ind_idx + v1][SG_W] = 1.0f;
-		vertices[ind_idx + v2][SG_W] = 1.0f;
-		vertices[ind_idx + v3][SG_W] = 1.0f;
-		indices[p*3] = ind_idx + v1;
-		indices[p*3+1] = ind_idx + v2;
-		indices[p*3+2] = ind_idx + v3;
-
-		tri_idx++;
-	}
-	if( num_tri == 0 )
-		return;
-	isTranslucent |= geometry_leaf->isTranslucent() ? true : false;
-	int num_ind = geometry_leaf->getNumVertices();
-	ind_idx += num_ind;
-}
-
-SGShadowVolume::ShadowCaster::~ShadowCaster() {
-	delete [] indices ;
-	delete [] vertices ;
-	delete [] triangles;
-	delete [] silhouetteEdgeIndices;
-}
-
-
-
-bool SGShadowVolume::ShadowCaster::sameVertex(int edge1, int edge2) {
-	if( edge1 == edge2)
-		return true;
-	sgVec3 delta_v;
-	sgSubVec3( delta_v, vertices[edge1], vertices[edge2]);
-	if( delta_v[SG_X] != 0.0)	return false;
-	if( delta_v[SG_Y] != 0.0)	return false;
-	if( delta_v[SG_Z] != 0.0)	return false;
-	return true;
-}
-
-
-//Calculate neighbour faces for each edge
-// caution, this is O(n2)
-void SGShadowVolume::ShadowCaster::SetConnectivity(void)
-{
-	int edgeCount = 0;
-
-	//set the neighbour indices to be -1
-	for(int ii=0; ii<numTriangles; ++ii)
-		triangles[ii].neighbourIndices[0] = 
-		triangles[ii].neighbourIndices[1] = 
-		triangles[ii].neighbourIndices[2] = -1;
-
-	//loop through triangles
-	for(int i=0; i<numTriangles-1; ++i)
-	{
-		//loop through edges on the first triangle
-		for(int edgeI=0; edgeI<3; ++edgeI)
-		{
-			//continue if this edge already has a neighbour set
-			if(triangles[i].neighbourIndices[ edgeI ]!=-1)
-				continue;
-
-			//get the vertex indices on each edge
-			int edgeI1=indices[i*3+edgeI];
-			int edgeI2=indices[i*3+(edgeI == 2 ? 0 : edgeI+1)];
-
-			//loop through triangles with greater indices than this one
-			for(int j=i+1; j<numTriangles; ++j)
-			{
-				//loop through edges on triangle j
-				for(int edgeJ=0; edgeJ<3; ++edgeJ)
-				{
-					//continue if this edge already has a neighbour set
-					if(triangles[j].neighbourIndices[ edgeJ ]!=-1) {
-						continue;
-					}
-					//get the vertex indices on each edge
-					int edgeJ1=indices[j*3+edgeJ];
-					int edgeJ2=indices[j*3+(edgeJ == 2 ? 0 : edgeJ+1)];
-
-					//if these are the same (possibly reversed order), these faces are neighbours
-#if 0
-					//no, we only use reverse order because same order means that
-					//the triangle is wrongly oriented and that will cause shadow artifact
-					if(	sameVertex(edgeI1, edgeJ1) && sameVertex(edgeI2, edgeJ2) ) {
-							// can happens with 'bad' geometry
-//							printf("flipped triangle detected...check your model\n");
-						continue;
-					}
-#endif
-					if(	sameVertex(edgeI1, edgeJ2) && sameVertex(edgeI2, edgeJ1) )
-					{
-						int edgeI3=indices[i*3+(edgeI == 0 ? 2 : edgeI-1)];
-						int edgeJ3=indices[j*3+(edgeJ == 0 ? 2 : edgeJ-1)];
-						if(	sameVertex(edgeI3, edgeJ3) ) {
-							// can happens with 'bad' geometry
-//							printf("duplicated tri...check your model\n");
-							// exit loop
-							break;
-						}
-						triangles[i].neighbourIndices[edgeI]=j;
-						triangles[j].neighbourIndices[edgeJ]=i;
-						edgeCount ++;
-						// exit loop
-						j = numTriangles;
-						break;
-					}
-				}
-			}
-		}
-	}
-//	printf("submodel has %d triangles and %d shared edges\n", numTriangles, edgeCount);
-}
-
-//calculate silhouette edges
-void SGShadowVolume::ShadowCaster::CalculateSilhouetteEdges(sgVec3 lightPosition)
-{
-	//Calculate which faces face the light
-	for(int i=0; i<numTriangles; ++i)
-	{
-		if( sgDistToPlaneVec3 ( triangles[i].planeEquations, lightPosition ) > 0.0 )
-			triangles[i].isFacingLight=true;
-		else
-			triangles[i].isFacingLight=false;
-	}
-
-	//loop through faces
-	int iEdgeIndices = 0;
-	sgVec4 farCap = {-lightPosition[SG_X], -lightPosition[SG_Y], -lightPosition[SG_Z], 1.0f};
-	sgCopyVec4( vertices[ numTriangles*3 ], farCap );
-
-	for(int t=0; t < numTriangles; t++) {
-		int v = t * 3;
-		//if this face is not facing the light, not a silhouette edge
-		if(!triangles[t].isFacingLight)
-		{
-			triangles[t].isSilhouetteEdge[0]=false;
-			triangles[t].isSilhouetteEdge[1]=false;
-			triangles[t].isSilhouetteEdge[2]=false;
-			continue;
-		}
-		//loop through edges
-		for(int j = 0 ; j < 3 ; j++) {
-			//this face is facing the light
-			//if the neighbouring face is not facing the light, or there is no neighbouring face,
-			//then this is a silhouette edge
-			if(triangles[t].neighbourIndices[j]==-1 || 
-				!triangles[triangles[t].neighbourIndices[j]].isFacingLight ) {
-				triangles[t].isSilhouetteEdge[j]=true;
-				silhouetteEdgeIndices[ iEdgeIndices++ ] = indices[v+(j == 2 ? 0 : j+1)];
-				silhouetteEdgeIndices[ iEdgeIndices++ ] = indices[v+j];
-				silhouetteEdgeIndices[ iEdgeIndices++ ] = numTriangles * 3;
-			}
-			else 
-				triangles[t].isSilhouetteEdge[j]=false;
-		}
-	}
-	lastSilhouetteIndicesCount = iEdgeIndices;
-}
-
-void SGShadowVolume::ShadowCaster::DrawInfiniteShadowVolume(sgVec3 lightPosition, bool drawCaps)
-{
-	glEnableClientState ( GL_VERTEX_ARRAY ) ;
-	glVertexPointer ( 4, GL_FLOAT, 0, vertices ) ;
-	glDrawElements ( GL_TRIANGLES, lastSilhouetteIndicesCount, GL_UNSIGNED_SHORT, silhouetteEdgeIndices ) ;
-
-	//Draw caps if required
- 	if(drawCaps)
-	{
-		glBegin(GL_TRIANGLES);
-		{
-			for(int i=0; i<numTriangles; ++i)
-			{
-				if(triangles[i].isFacingLight) {
-					int v = i*3;
-					glVertex3fv( vertices[indices[v+0]] );
-					glVertex3fv( vertices[indices[v+1]] );
-					glVertex3fv( vertices[indices[v+2]] );
-				}
-			}
-		}
-		glEnd();
-	}
-}
-
-
-void SGShadowVolume::ShadowCaster::getNetTransform ( ssgBranch * branch, sgMat4 xform )
-{
-	// one less matmult...
-	bool first = true;
-	while( branch && branch != lib_object ) {
-		if( branch->isA(ssgTypeTransform()) ) {
-			sgMat4 transform;
-			if( first ) {
-				((ssgTransform *) branch)->getTransform( xform );
-				first = false;
-			} else {
-				((ssgTransform *) branch)->getTransform(transform);
-				sgPostMultMat4 ( xform, transform ) ;
-			}
-		}
-		branch = branch->getParent( 0 );
-	}
-	if( first )
-		sgMakeIdentMat4 ( xform ) ;
-}
-
-// check the value of <select> and <range> animation
-// wich have been computed during the rendering
-bool SGShadowVolume::ShadowCaster::isSelected (  ssgBranch * branch, float dist ) {
-	while( branch && branch != lib_object) {
-		if( sgCheckAnimationBranch( (ssgEntity *) branch ) ) {
-			if( ((SGAnimation *) branch->getUserData())->get_animation_type() == 1)
-				if( ((SGShadowAnimation *) branch->getUserData())->get_condition_value() )
-					return false;
-		}
-		// recompute range check since the value in the branch is shared by multiple objects
-		// we can only have the last value
-		if( branch->isA(ssgTypeRangeSelector()) )
-			if( dist >= ((ssgRangeSelector *) branch)->getRange(1) ||
-				dist < ((ssgRangeSelector *) branch)->getRange(0))
-				return false;
-		if( branch->isA(ssgTypeSelector()) )
-			if( !((ssgSelector *) branch)->isSelected(0) )
-				return false;
-		branch = branch->getParent(0);
-	}
-	return true;
-}
-/*
-	trans ----- personality ---- shared object
-	perso1 *-----
-	             \
-	              *--------* shared object
-	             /
-	perso2 *-----
-*/
-void SGShadowVolume::ShadowCaster::computeShadows(sgMat4 rotation, sgMat4 rotation_translation,
-	OccluderType occluder_type) {
-  
-	// check the select and range ssgSelector node
-	// object can't cast shadow if it is not visible
-	sgVec4 trans;
-	sgCopyVec4( trans, rotation_translation[3] );
-	sgAddVec4( trans, states->CameraViewM[3] );
-	float dist = sgLengthVec3( trans );
-
-  	if( first_select && ! isSelected( first_select, dist) )
-		return;
-
-		// get the transformations : this comes from animation code for example
-		// or static transf
-	sgMat4 transf;
- 	sgVec3 lightPos;
-	int deltaFrame = occluder_type == SGShadowVolume::occluderTypeAircraft ? 0 : 9;
-  	if( states->frameNumber - frameNumber > deltaFrame) {
-		sgMat4 transform ;
-		sgMat4 invTransform;
-  		getNetTransform( (ssgBranch *) geometry_leaf, transform );
-		sgCopyMat4( last_transform, transform );
-		sgPostMultMat4( transform, rotation );
-		sgTransposeNegateMat4 ( invTransform, transform ); 
-
-  		sgCopyVec3( lightPos, states->sunPos );
- 		sgXformPnt3( lightPos, invTransform );
-
-		sgVec3 lightPosNorm;
-		sgNormaliseVec3( lightPosNorm, lightPos );
-		float deltaPos = sgAbs(lightPosNorm[0] - last_lightpos[0]) + 
-				sgAbs(lightPosNorm[1] - last_lightpos[1]) +
-				sgAbs(lightPosNorm[2] - last_lightpos[2]);
-		// if the geometry has rotated/moved enought then
-		// we need to recompute the silhouette
-		// but this computation does not need to be done each frame
-   		if( deltaPos > 0.0 ) {
-			CalculateSilhouetteEdges( lightPos );
-			sgCopyVec3( last_lightpos, lightPosNorm );
-			frameNumber = states->frameNumber ;
-			statSilhouette ++;
-		}
-	}
-	sgCopyMat4( transf, last_transform );
-	sgPostMultMat4( transf, rotation_translation );
-  	glLoadMatrixf ( (float *) states->CameraViewM ) ;
-   	glMultMatrixf( (float *) transf );
-
-	if( states->shadowsDebug_enabled )
-	{
-   		glStencilFunc(GL_ALWAYS, 0, ~0);
-	  	glDisable( GL_CULL_FACE  );
-		glDisable( GL_DEPTH_TEST );
-		glDisable(GL_STENCIL_TEST);
-		glColorMask(1, 1, 1, 1);
-  		glColor4f(0.0, 0.0, 1.0, 1.0);
-	  	glBegin(GL_LINES);
-		for(int i=0; i<numTriangles; ++i)
-		{
-			if(!triangles[i].isFacingLight)
-				continue;
-			int v = i*3;
-			//Loop through edges on this face
-			sgVec3 vertex1, vertex2, vertex3;
-			sgCopyVec3(vertex1, vertices[indices[v+0]]);
-			sgCopyVec3(vertex2, vertices[indices[v+1]]);
-			sgCopyVec3(vertex3, vertices[indices[v+2]]);
-
-			if(triangles[i].isSilhouetteEdge[0]) {
-				glVertex3fv(vertex2);
- 				glVertex3fv(vertex1);
-			}
-			if(triangles[i].isSilhouetteEdge[1]) {
-				glVertex3fv(vertex2);
- 				glVertex3fv(vertex3);
-			}
-			if(triangles[i].isSilhouetteEdge[2]) {
-				glVertex3fv(vertex3);
- 				glVertex3fv(vertex1);
-			}
-		}
-		glEnd();
-		glColorMask(0, 0, 0, 0);
- 	  	glEnable( GL_CULL_FACE  );
-		glEnable( GL_DEPTH_TEST );
-		glEnable(GL_STENCIL_TEST);
-	}
-
-
-		// TODO:compute intersection with near clip plane...
- 		bool needZFail=false;
-
-		// GL_INCR_WRAP_EXT, GL_DECR_WRAP_EXT
-
- 		if(needZFail)
-		{
-			//Increment stencil buffer for back face depth fail
-			glStencilFunc(GL_ALWAYS, 0, ~0);
-			glStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
-			glCullFace(GL_FRONT);
-
-			DrawInfiniteShadowVolume( lightPos, true);
-
-			//Decrement stencil buffer for front face depth fail
-			glStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
-			glCullFace(GL_BACK);
-
-			DrawInfiniteShadowVolume( lightPos, true);
-		}
-		else	//using zpass
-		{
-			//Increment stencil buffer for front face depth pass
-			if( states->use_alpha ) {
-				glBlendEquationPtr( GL_FUNC_ADD );
-				glBlendFunc( GL_ONE, GL_ONE );
- 			  	glColor4ub(1, 1, 1, 16);
-			} else {
-			  	glColor4f(1.0f, 1.0f, 0.0f, 0.5f);
-				glStencilFunc(GL_ALWAYS, 0, ~0);
-				glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
-			}
-			glCullFace(GL_BACK);
-
-			DrawInfiniteShadowVolume( lightPos, states->shadowsAC_transp_enabled & isTranslucent);
-
-			//Decrement stencil buffer for back face depth pass
-			if( states->use_alpha ) {
-				glBlendEquationPtr( GL_FUNC_REVERSE_SUBTRACT );
-				glBlendFunc( GL_ONE, GL_ONE );
-			  	glColor4ub(1, 1, 1, 16);
-			} else {
-				glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
-			}
-			glCullFace(GL_FRONT);
-
-			DrawInfiniteShadowVolume( lightPos, states->shadowsAC_transp_enabled & isTranslucent);
-		}
-}
-
-
-void SGShadowVolume::SceneryObject::computeShadows(void) {
-
-	// compute intersection with view frustum
-	// use pending_object (pointer on obj transform) & tile transform
-	// to get position
-		if( !scenery_object ) {
-			if( states->frameNumber - states->lastTraverseTreeFrame > 5 ) {
-				find_trans();
-				if( scenery_object )
-					traverseTree( pending_object );
-					states->lastTraverseTreeFrame = states->frameNumber;
-			}
-			return;
-		}
-		sgMat4 rotation, rotation_translation;
-		scenery_object->getNetTransform ( rotation_translation );
-		// split placement offset into rotation and offset
-		// rotation from model inside world
-		// we are not interested in translation since the light is very far away
-		// without translation we reduce the frequency of updates of the silouhette
-		sgCopyMat4( rotation, rotation_translation );
-   		sgSetVec4( rotation[3], 0, 0, 0, 1);
-
-		ShadowCaster_list::iterator iShadowCaster;
-		for(iShadowCaster = parts.begin() ; iShadowCaster != parts.end() ; ++iShadowCaster ) {
-			(*iShadowCaster)->computeShadows(rotation, rotation_translation, occluder_type);
-		}
-}
-
-static ssgCullResult cull_test ( ssgEntity *e, sgFrustum *f, sgMat4 m, int test_needed )
-{
-  if ( ! test_needed )
-    return SSG_INSIDE ;
-
-  sgSphere tmp = *(e->getBSphere()) ;
-
-  if ( tmp.isEmpty () )
-    return SSG_OUTSIDE ;
-
-  tmp . orthoXform ( m ) ;
-  if( tmp.center[2] == 0.0 )
-	  return SSG_STRADDLE;
-  // cull if too small on screen
-  if ( tmp.radius / sgAbs(tmp.center[2]) < 1.0 / 40.0 )
-    return SSG_OUTSIDE ;
-
-  return (ssgCullResult) f -> contains ( &tmp ) ;
-}
-
-
-void SGShadowVolume::cull ( ssgBranch *b, sgFrustum *f, sgMat4 m, int test_needed )
-{
-	int cull_result = cull_test ( (ssgEntity *) b, f, m, test_needed ) ;
-
-	if ( cull_result == SSG_OUTSIDE )
-		return ;
-	if( b->isA( ssgTypeTransform() ) ) {
-
-		SceneryObject_map::iterator iSceneryObject = sceneryObjects.find( b );
-		if( iSceneryObject != sceneryObjects.end() ) {
-			SceneryObject *an_occluder = iSceneryObject->second;
-			if( shadowsTO_enabled && (an_occluder->occluder_type == occluderTypeTileObject) ||
-				shadowsAI_enabled && (an_occluder->occluder_type == occluderTypeAI ) ||
-				shadowsAC_enabled && (an_occluder->occluder_type == occluderTypeAircraft ) )
-					an_occluder->computeShadows();
-
-			return;
-		}
-		sgMat4 tmp, transform ;
-		sgCopyMat4 ( tmp, m ) ;
-		((ssgTransform *)b)->getTransform( transform );
-		sgPreMultMat4 ( tmp,  transform ) ;
-		glPushMatrix () ;
-		glLoadMatrixf ( (float *) tmp ) ;
-		for ( ssgEntity *e = b->getKid ( 0 ) ; e != NULL ; e = b->getNextKid() )
-			cull ( (ssgBranch *) e, f, tmp, cull_result != SSG_INSIDE ) ;
-		glPopMatrix () ;
-	} else if( b->isAKindOf( ssgTypeSelector() ) ) {
-		int s = ((ssgSelector *) b)->getSelect() ;
-		if( b->isA( ssgTypeRangeSelector() ) ) {
-			float range = sgLengthVec3 ( m [ 3 ] ) ;
-			s = (range < ((ssgRangeSelector *) b)->getRange(1) &&
-				range >= ((ssgRangeSelector *) b)->getRange(0) ) ? 1 : 0;
-		}
-		for ( ssgEntity *e = b->getKid ( 0 ) ; e != NULL ; e = b->getNextKid(), s >>= 1 )
-			if ( s & 1 )
-				cull ( (ssgBranch *) e, f, m, cull_result != SSG_INSIDE ) ;
-	} else if( b->isAKindOf( ssgTypeBranch() ) ) {
-		char *name = b->getName();
-		// quick exit for the hundreds of ground leafs
-		if( name && !strcmp(name, "LocalTerrain") )
-			return;
-		for ( ssgEntity *e = b->getKid ( 0 ) ; e != NULL ; e = b->getNextKid() )
-			if( ! e->isAKindOf( ssgTypeLeaf() ) )
-				cull ( (ssgBranch *) e, f, m, cull_result != SSG_INSIDE ) ;
-	}
-}
-
-/*
-	1) starting at the root of a scene object we follow all branch to find vertex leaf.
-	each vertex leaf will create a shadow sub object so that the shadow casted by this
-	geometry can be correctly rendered according to select or transform nodes.
-	2) models are not optimized for shadows because the geometry is cut by
-		- select / transform nodes
-		- material differences
-	since we are not interested in the geometry material we try to merge same level
-	leafs. this can divide the number of shadow sub models by a lot (reducing the cpu
-	overhead for matrix computation) and at the end this will reduce the number of
-	silouhette edge by a lot too.
-*/
-static bool filterLeaf(ssgLeaf *this_kid) {
-	const char *leaf_name = this_kid->getName();
-/*	ssgSimpleState *sst = (ssgSimpleState *) this_kid->getState();
-	if( sst && sst->isTranslucent() )
-		return false;*/
-	if( ! leaf_name )
-		return true;
-	char lname[20];
-	unsigned int l = 0;
-	char *buff;
-	for( buff = lname; *leaf_name && l < (sizeof( lname )-1); ++buff, l++ )
-	     *buff = tolower(*leaf_name++);
-	*buff = 0;
-	if( !strncmp(lname, "noshadow", 8) )
-		return false;
-	return true;
-}
-void SGShadowVolume::SceneryObject::traverseTree(ssgBranch *branch) {
-	int num_tri = 0;
-	int num_leaf = 0;
-
-	if( sgCheckAnimationBranch( (ssgEntity *) branch ) ) {
-		if( ((SGAnimation *) branch->getUserData())->get_animation_type() == 1)
-			if( ((SGShadowAnimation *) branch->getUserData())->get_condition_value() )
-				return;
-	}
-
-	for(int i = 0 ; i < branch->getNumKids() ; i++) {
-		ssgEntity *this_kid = branch->getKid( i );
-		if( this_kid->isAKindOf(ssgTypeLeaf()) ) {
-			if( filterLeaf( (ssgLeaf *) this_kid ) ) {
-				num_tri += ((ssgLeaf *) this_kid)->getNumTriangles();
-				num_leaf ++;
-			}
-		} else
-			traverseTree( (ssgBranch *) this_kid );
-	}
-	if( num_tri > 0) {
-		int tri_idx = 0;
-		int ind_idx = 0;
-		ShadowCaster *new_part = new ShadowCaster( num_tri, branch);
-		new_part->scenery_object = scenery_object;
-		new_part->lib_object = lib_object;
-		new_part->isTranslucent = false;
-		for(int i = 0 ; i < branch->getNumKids() ; i++) {
-			ssgEntity *this_kid = branch->getKid( i );
-			if( this_kid->isAKindOf(ssgTypeLeaf()) ) {
-				if( filterLeaf( (ssgLeaf *) this_kid ) )
-					new_part->addLeaf( tri_idx, ind_idx, (ssgLeaf *) this_kid );
-			}
-		}
-		// only do that for aircraft
-		if( occluder_type != SGShadowVolume::occluderTypeAircraft )
-			new_part->isTranslucent = false;
-		new_part->SetConnectivity();
-		parts.push_back( new_part );
-	}
-}
-
-void SGShadowVolume::SceneryObject::find_trans(void) {
-	ssgBranch *branch = pending_object;
-	// check the existence of the root node
-	while( branch && branch->getNumParents() > 0 ) {
-		branch = branch->getParent(0);
-	}
-	// check if we are connected to the scene graph
-	if( !branch->isA(ssgTypeRoot() ) )
-		return;
-	scenery_object = pending_object;
-}
-
-SGShadowVolume::SceneryObject::SceneryObject(ssgBranch *_scenery_object, OccluderType _occluder_type) :
-        scenery_object ( 0 ),
-        pending_object ( _scenery_object ),
-        occluder_type ( _occluder_type )
-{
-	// queue objects, don't do all the work in the first frames because of
-	// massive cpu power needed
-	statObj++;
-	if( occluder_type == SGShadowVolume::occluderTypeAircraft )
-		lib_object = _scenery_object;
-	else
-		lib_object = (ssgBranch *) ((ssgBranch *)_scenery_object->getKid(0))->getKid(0);
-}
-
-SGShadowVolume::SceneryObject::~SceneryObject()
-{
-	ShadowCaster_list::iterator iParts;
-	for(iParts = parts.begin() ; iParts != parts.end(); ++iParts ) {
-		delete *iParts;
-	}
-	parts.clear();
-}
-
-void SGShadowVolume::computeShadows(void) {
-
-	// intensity = ambient + lights
-	// lights = sun_const * (sun_angle . normal)
-	double dot_light = cos(sun_angle);
-	// do nothing if sun is under horizon
-	if( dot_light < 0.2 )
-		return;
-
-	//Draw shadow volumes
-	glPushAttrib(GL_ALL_ATTRIB_BITS);
- 	glPushClientAttrib ( GL_CLIENT_VERTEX_ARRAY_BIT ) ;
-	glDisableClientState ( GL_COLOR_ARRAY         ) ;
-	glDisableClientState ( GL_NORMAL_ARRAY        ) ;
-	glDisableClientState ( GL_TEXTURE_COORD_ARRAY ) ;
-
-	if( use_alpha ) {
-		glColorMask(0, 0, 0, 1);
- 		glClearColor(0.0, 0.0, 0.0, 0.0 );
-		glClear(GL_COLOR_BUFFER_BIT);
- 		glDisable(GL_ALPHA);
-		glEnable(GL_BLEND);
-	} else {
-		glClearStencil( 0 );
-		glClear(GL_STENCIL_BUFFER_BIT);
-		glColorMask(0, 0, 0, 0);
-		glEnable(GL_STENCIL_TEST);
-		glDisable(GL_ALPHA);
-		glDisable(GL_BLEND);
-	}
-	glDisable( GL_LIGHTING );
-	glDisable( GL_FOG );
-  	glEnable( GL_CULL_FACE  );
-//	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
-    glPolygonOffset(0.0,2.0);
-//    glPolygonOffset(0.0,30.0);
-    glEnable(GL_POLYGON_OFFSET_FILL);
-
- 	glShadeModel(GL_FLAT);
-
-	glDepthMask( false );
-	glEnable( GL_DEPTH_TEST );
-	glDepthFunc(GL_LESS);
-
-	{
-		float w, h;
-		sgFrustum frustum;
-		sgEnviro.getFOV( w, h );
-		frustum.setFOV( w, h );
-		frustum.setNearFar(0.1f, 5000.0f);
-		sgMat4 m;
-		ssgGetModelviewMatrix( m );
-		cull( ssg_root, &frustum, m, true);
-	}
-
-
-	glMatrixMode   ( GL_PROJECTION ) ;
-	glPushMatrix   () ;
-	glLoadIdentity () ;
-	glOrtho        ( -100, 100, -100, 100, -1, 1 ) ;
-	glMatrixMode   ( GL_MODELVIEW ) ;
-	glPushMatrix   () ;
-	glLoadIdentity () ;
-
-	glDisable(GL_DEPTH_TEST);
-	glDisable(GL_CULL_FACE);
-//	glBindTexture(GL_TEXTURE_2D, 0);
-	glPolygonMode(GL_FRONT, GL_FILL);
-	if( use_alpha ) {
-		// there is a flaw in the Roettger paper, this does not work for some geometry
-		// where we increment (multiply) the buffer a few times then we
-		// decrement (divide) a few times. Decrementing more then once will give a
-		// non shadowed parts with mask value < 0.25 because the incrementation was
-		// clamped
-		// Solution : don't use a start value as high as 0.25 but the smallest value
-		// posible ie 1/256. This is not a general solution, a stencil buffer will
-		// support 255 incrementation before clamping, the alpha mask only 7.
-		// => that still does not work with our geometry so use subtractive blend
-
-		// clamp mask = {0,16,32,64,...} => {0,16,16,16,...}
-		glBlendEquationPtr( GL_MIN_EXT );
-   		glBlendFunc( GL_DST_COLOR, GL_ONE );
- 		glColor4ub(1, 1, 1, 16);
- 		glRectf(-100,-100,100,100);
-		// scale mask = {0,16} => {0,64}
-		glBlendEquationPtr( GL_FUNC_ADD );
-   		glBlendFunc( GL_DST_COLOR, GL_ONE );
- 		glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
- 		glRectf(-100,-100,100,100);
-		glRectf(-100,-100,100,100);
-		// negate mask => {0,64} => {255, 191}
-		glBlendFunc( GL_ONE_MINUS_DST_COLOR, GL_ZERO );
-		glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
- 		glRectf(-100,-100,100,100);
-		// apply mask
-		glColorMask(1, 1, 1, 1);
-   		glBlendFunc( GL_ZERO, GL_DST_ALPHA );
-   		glColor4f(1.0f, 0.5f, 0.2f, 1.0f);
-		glRectf(-100,-100,100,100);
-	} else {
-		// now the stencil contains 0 for scenery in light and != 0 for parts in shadow
-		// draw a quad covering the screen, the stencil will be the mask
-		// we darken the shadowed parts
-		glColorMask(1, 1, 1, 1);
-		glStencilFunc(GL_NOTEQUAL, 0, ~0);
-		glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
-		glEnable(GL_STENCIL_TEST);
-		glEnable(GL_ALPHA);
-		glAlphaFunc(GL_GREATER, 0.0f);
-		glEnable(GL_BLEND);
-		glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
-  		glColor4f(0.0, 0.0, 0.0, sgLerp(0.1, 0.3, dot_light) );
-		// fixed value is better, the previous line is surely wrong
-  		glColor4f(0.0, 0.0, 0.0, 0.3 );
-		glRectf(-100,-100,100,100);
-	}
-	glMatrixMode   ( GL_PROJECTION ) ;
-	glPopMatrix    () ;
-	glMatrixMode   ( GL_MODELVIEW ) ;
-	glPopMatrix    () ;
-
-	glDisable(GL_STENCIL_TEST);
-	glPopClientAttrib ( ) ;
-	glPopAttrib();
-}
-
-SGShadowVolume::SGShadowVolume( ssgBranch *root ) : 
-	shadows_enabled( false ),
-	frameNumber( 0 ),
-	lastTraverseTreeFrame ( 0 ),
-	ssg_root( root ),
-	shadows_rendered( false )
-{
-	states = this;
-}
-
-SGShadowVolume::~SGShadowVolume() {
-	SceneryObject_map::iterator iSceneryObject;
-	for(iSceneryObject = sceneryObjects.begin() ; iSceneryObject != sceneryObjects.end(); ++iSceneryObject ) {
-		delete iSceneryObject->second;
-	}
-	sceneryObjects.clear();
-}
-
-void SGShadowVolume::init(SGPropertyNode *sim_rendering_options) {
-	shadows_enabled = true;
-	sim_rendering = sim_rendering_options;
-	GLint stencilBits = 0, alphaBits = 0;
-	glGetIntegerv( GL_STENCIL_BITS, &stencilBits );
-	glGetIntegerv( GL_ALPHA_BITS, &alphaBits );
-	bool hasSubtractiveBlend = SGIsOpenGLExtensionSupported("GL_EXT_blend_subtract");
-	bool hasMinMaxBlend = SGIsOpenGLExtensionSupported("GL_EXT_blend_minmax");
-	if( hasSubtractiveBlend )
-		glBlendEquationPtr = (glBlendEquationProc ) SGLookupFunction("glBlendEquationEXT");
-	canDoAlpha = (alphaBits >= 8) && hasSubtractiveBlend && hasMinMaxBlend;
-	canDoStencil = (stencilBits >= 3);
-	if( !canDoStencil )
-		if( canDoAlpha )
-			SG_LOG(SG_ALL, SG_WARN, "SGShadowVolume:no stencil buffer, using alpha buffer");
-		else
-			SG_LOG(SG_ALL, SG_WARN, "SGShadowVolume:no stencil buffer and no alpha buffer");
-}
-
-void SGShadowVolume::startOfFrame(void) {
-}
-void SGShadowVolume::deleteOccluderFromTile(ssgBranch *tile) {
-	SceneryObject_map::iterator iSceneryObject;
-	for(iSceneryObject = sceneryObjects.begin() ; iSceneryObject != sceneryObjects.end(); ) {
-		SceneryObject_map::iterator iCurrent = iSceneryObject ++;
-		if( iCurrent->second->tile == tile ) {
-			delete iCurrent->second;
-			sceneryObjects.erase( iCurrent );
-		}
-	}
-}
-
-void SGShadowVolume::deleteOccluder(ssgBranch *occluder) {
-	// skip first node and go to first transform (placement)
-	while( occluder && !occluder->isA(ssgTypeTransform()))
-		occluder = (ssgBranch *) occluder->getKid(0);
-
-	// check if we allready know this object
-	SceneryObject_map::iterator iSceneryObject = sceneryObjects.find( occluder );
-	if( iSceneryObject != sceneryObjects.end() ) {
-		delete iSceneryObject->second;
-		sceneryObjects.erase( occluder );
-	}
-}
-
-void SGShadowVolume::addOccluder(ssgBranch *occluder, OccluderType occluder_type, ssgBranch *tile) {
-	// skip first node and go to first transform (placement)
-	while( occluder && !occluder->isA(ssgTypeTransform()))
-		occluder = (ssgBranch *) occluder->getKid(0);
-
-	// check if we allready know this object
-	SceneryObject_map::iterator iSceneryObject = sceneryObjects.find( occluder );
-	if( iSceneryObject == sceneryObjects.end() ) {
-//		printf("adding model %x %x\n", occluder, tile);
-		SceneryObject *entry = new SceneryObject( occluder, occluder_type );
-		entry->tile = tile;
-		sceneryObjects[ occluder ] = entry;
-	}
-
-}
-
-void SGShadowVolume::setupShadows( double lon, double lat,
-		double gst, double SunRightAscension, double SunDeclination, double sunAngle) {
-
-	shadowsAC_enabled = sim_rendering->getBoolValue("shadows-ac", false);
-	shadowsAC_transp_enabled = sim_rendering->getBoolValue("shadows-ac-transp", false);
-	shadowsAI_enabled = sim_rendering->getBoolValue("shadows-ai", false);
-	shadowsTO_enabled = sim_rendering->getBoolValue("shadows-to", false);
-	shadowsDebug_enabled = sim_rendering->getBoolValue("shadows-debug", false);
-	shadows_enabled = shadowsAC_enabled || shadowsAI_enabled || shadowsTO_enabled;
-	shadows_enabled &= canDoAlpha || canDoStencil;
-	use_alpha = ((!canDoStencil) || sim_rendering->getBoolValue("shadows-alpha", false)) &&
-		canDoAlpha;
-
-	if( ! shadows_enabled )
-		return;
-
-	shadows_rendered = false;
-	sun_angle = sunAngle;
-	{
-	sgMat4 GST, RA, DEC;
-	sgVec3 axis;
-
-
-	sgSetVec3( axis, 0.0, 0.0, -1.0 );
-	sgMakeRotMat4( GST, (gst) * 15.0, axis );
-
-	sgSetVec3( axis, 0.0, 0.0, 1.0 );
-	sgMakeRotMat4( RA, (SunRightAscension * SGD_RADIANS_TO_DEGREES) - 90.0, axis );
-
-	sgSetVec3( axis, 1.0, 0.0, 0.0 );
-	sgMakeRotMat4( DEC, SunDeclination * SGD_RADIANS_TO_DEGREES, axis );
-
-	sgMat4 TRANSFORM;
-	sgMakeIdentMat4( TRANSFORM );
-	sgPreMultMat4( TRANSFORM, GST );
-	sgPreMultMat4( TRANSFORM, RA );
-	sgPreMultMat4( TRANSFORM, DEC );
-   	sgSetVec3( sunPos, 0.0, 9900000.0, 0.0);
-	sgXformPnt3( sunPos, TRANSFORM );
-	}
-
-	ssgGetModelviewMatrix( CameraViewM );
-
-}
-
-void SGShadowVolume::endOfFrame(void) {
-	if( ! shadows_enabled )
-		return;
-	if( shadows_rendered )
-		return;
-	glBindTexture(GL_TEXTURE_2D, 0);
-	glBindTexture(GL_TEXTURE_1D, 0);
-
-	glMatrixMode(GL_MODELVIEW);
-	computeShadows();
-	frameNumber ++;
-	shadows_rendered = true;
-}
-
-int SGShadowVolume::ACpostTravCB( ssgEntity *entity, int traversal_mask ) {
-	if( states->shadowsAC_transp_enabled && (SSGTRAV_CULL & traversal_mask) )
-		states->endOfFrame();
-	return 0;
-}
-
diff --git a/simgear/scene/model/shadowvolume.hxx b/simgear/scene/model/shadowvolume.hxx
deleted file mode 100644
index 1f4f3f56..00000000
--- a/simgear/scene/model/shadowvolume.hxx
+++ /dev/null
@@ -1,146 +0,0 @@
-// Shadow volume class
-//
-// Written by Harald JOHNSEN, started June 2005.
-//
-// Copyright (C) 2005  Harald JOHNSEN - hjohnsen@evc.net
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License as
-// published by the Free Software Foundation; either version 2 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
-// General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-//
-//
-
-#ifndef _SHADOWVOLUME_HXX
-#define _SHADOWVOLUME_HXX
-
-#include <simgear/compiler.h>
-#include <simgear/props/props.hxx>
-
-#include <vector>
-#include <map>
-
-using std::vector;
-using std::map;
-
-class ssgBranch;
-class ssgLeaf;
-class SGPropertyNode;
-
-/**
- * A class wich add shadows in a postprocess stage.
- */
-class SGShadowVolume {
-
-public:
-	SGShadowVolume( ssgBranch *root );
-	~SGShadowVolume();
-
-	typedef enum {
-		occluderTypeAircraft,
-		occluderTypeAI,
-		occluderTypeTileObject
-	} OccluderType;
-
-	void init(SGPropertyNode *sim_rendering_options);
-	void startOfFrame(void);
-	void addOccluder(ssgBranch *occluder, OccluderType occluder_type, ssgBranch *tile=0);
-	void deleteOccluder(ssgBranch *occluder);
-	void deleteOccluderFromTile(ssgBranch *tile);
-	void setupShadows(double lon, double lat,
-		double gst, double SunRightAscension, double SunDeclination, double sunAngle );
-	void endOfFrame(void);
-	static int ACpostTravCB( ssgEntity *entity, int traversal_mask );
-
-private:
-
-	class ShadowCaster
-	{
-	public:
-		typedef struct {
-			sgVec4 planeEquations;
-			int neighbourIndices[3];
-			bool isSilhouetteEdge[3];
-			bool isFacingLight;
-		} triData;
-
-		ssgSharedPtr<ssgBranch> geometry_leaf;
-		ssgSharedPtr<ssgBranch> scenery_object;
-		ssgSharedPtr<ssgBranch> lib_object;
-		ssgSharedPtr<ssgBranch> first_select;
-		sgVec3 last_lightpos;
-		sgMat4 last_transform;
-		int frameNumber;
-
-		int *indices;
-		int numTriangles;
-		triData *triangles;
-
-		sgVec4 * vertices;
-		GLushort *silhouetteEdgeIndices;
-		int lastSilhouetteIndicesCount;
-		bool isTranslucent;
-
-		ShadowCaster( int _num_tri, ssgBranch * _geometry_leaf );
-		~ShadowCaster();
-		void addLeaf( int & tri_idx, int & ind_idx, ssgLeaf *_geometry_leaf );
-		void SetConnectivity();
-		void CalculateSilhouetteEdges(sgVec3 lightPosition);
-		void DrawInfiniteShadowVolume(sgVec3 lightPosition, bool drawCaps);
-		void computeShadows(sgMat4 rotation, sgMat4 rotation_translation, OccluderType occluder_type);
-		void getNetTransform ( ssgBranch * branch, sgMat4 xform );
-		bool isSelected (  ssgBranch * branch, float dist);
-
-		bool sameVertex(int edge1, int edge2);
-	};
-	typedef vector<ShadowCaster *> ShadowCaster_list;
-
-	class SceneryObject {
-	public:
-		SceneryObject(ssgBranch *_scenery_object, OccluderType _occluder_type);
-		~SceneryObject();
-		void computeShadows(void);
-		void traverseTree(ssgBranch *branch);
-		void find_trans(void);
-		ssgSharedPtr<ssgBranch> scenery_object;
-		ssgSharedPtr<ssgBranch> lib_object;
-		ssgSharedPtr<ssgBranch> pending_object;
-		ssgSharedPtr<ssgBranch> tile;
-		ShadowCaster_list parts;
-		OccluderType occluder_type;
-	};
-	typedef map<ssgSharedPtr<ssgBranch>, SceneryObject *> SceneryObject_map;
-
-
-private:
-	void update_light_view(void);
-	void computeShadows(void);
-	void cull ( ssgBranch *b, sgFrustum *f, sgMat4 m, int test_needed );
-
-	bool	shadows_enabled;
-	bool	shadowsAC_enabled, shadowsAI_enabled, shadowsTO_enabled, shadowsDebug_enabled;
-	bool	shadowsAC_transp_enabled;
-	bool	use_alpha;
-	bool	canDoAlpha, canDoStencil;
-	SGPropertyNode_ptr sim_rendering;
-
-	sgVec3 sunPos;
-	int frameNumber;
-	int lastTraverseTreeFrame;
-	sgMat4 CameraViewM;
-	double	sun_angle;
-	SceneryObject_map sceneryObjects;
-	ssgSharedPtr<ssgBranch> ssg_root;
-	bool shadows_rendered;
-};
-
-#endif // _SHADOWVOLUME_HXX
-- 
2.39.5