source-engine/vphysics/ledgewriter.cpp

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: low-level code to write IVP_Compact_Ledge/IVP_Compact_Triangle.
//			also includes code to pack/unpack outer hull ledges to 8-bit rep
//
//=============================================================================
#include "cbase.h"
#include "convert.h"

#include <ivp_surface_manager.hxx>
#include <ivp_surman_polygon.hxx>
#include <ivp_template_surbuild.hxx>
#include <ivp_compact_surface.hxx>
#include <ivp_compact_ledge.hxx>

#include "utlbuffer.h"
#include "ledgewriter.h"

// gets the max vertex index referenced by a compact ledge
static int MaxLedgeVertIndex( const IVP_Compact_Ledge *pLedge )
{
	int maxIndex = -1;
	for ( int i = 0; i < pLedge->get_n_triangles(); i++ )
	{
		const IVP_Compact_Triangle *pTri = pLedge->get_first_triangle() + i;
		for ( int j = 0; j < 3; j++ )
		{
			int ivpIndex = pTri->get_edge(j)->get_start_point_index();
			maxIndex = max(maxIndex, ivpIndex);
		}
	}
	return maxIndex;
}


struct vertmap_t
{

	CUtlVector<int> map;
	int minRef;
	int maxRef;
};

// searches pVerts for each vert used by pLedge and builds a one way map from ledge indices to pVerts indices
// NOTE: pVerts is in HL coords, pLedge is in IVP coords
static void BuildVertMap( vertmap_t &out, const Vector *pVerts, int vertexCount, const IVP_Compact_Ledge *pLedge )
{
	out.map.EnsureCount(MaxLedgeVertIndex(pLedge)+1);
	for ( int i = 0; i < out.map.Count(); i++ )
	{
		out.map[i] = -1;
	}
	out.minRef = vertexCount;
	out.maxRef = 0;
	const IVP_Compact_Poly_Point *pVertList = pLedge->get_point_array();
	for ( int i = 0; i < pLedge->get_n_triangles(); i++ )
	{
		// iterate each triangle, for each referenced vert that hasn't yet been mapped, search for the nearest match
		const IVP_Compact_Triangle *pTri = pLedge->get_first_triangle() + i;
		for ( int j = 0; j < 3; j++ )
		{
			int ivpIndex = pTri->get_edge(j)->get_start_point_index();
			if ( out.map[ivpIndex] < 0 )
			{
				int index = -1;
				Vector tmp;
				ConvertPositionToHL( &pVertList[ivpIndex], tmp);
				float minDist = 1e24;
				for ( int k = 0; k < vertexCount; k++ )
				{
					float dist = (tmp-pVerts[k]).Length();
					if ( dist < minDist )
					{
						index = k;
						minDist = dist;
					}
				}
				Assert(minDist<0.1f);
				out.map[ivpIndex] = index;
				out.minRef = min(out.minRef, index);
				out.maxRef = max(out.maxRef, index);
			}
		}
	}
}


// Each IVP_Compact_Triangle and IVP_Compact_Edge occupies an index 
// 0,1,2,3 is tri, edge, edge, edge (tris and edges are both 16 bytes)
// So you can just add the index to get_first_triangle to get a pointer 
inline int EdgeIndex( const IVP_Compact_Ledge *pLedge, const IVP_Compact_Edge *pEdge )
{
	return pEdge - (const IVP_Compact_Edge *)pLedge->get_first_triangle();
}

// Builds a packedhull_t from a IVP_Compact_Ledge.  Assumes that the utlbuffer points at the memory following pHull (pHull is the header, utlbuffer is the body)
void PackLedgeIntoBuffer( packedhull_t *pHull, CUtlBuffer &buf, const IVP_Compact_Ledge *pLedge, const virtualmeshlist_t &list )
{
	if ( !pLedge )
		return;

	// The lists store the ivp index of each element to be written out
	// The maps store the output packed index for each ivp index
	CUtlVector<int> triangleList, triangleMap;
	CUtlVector<int> edgeList, edgeMap;
	vertmap_t vertMap;
	BuildVertMap( vertMap, list.pVerts, list.vertexCount, pLedge );
	pHull->baseVert = vertMap.minRef;
	// clear the maps
	triangleMap.EnsureCount(pLedge->get_n_triangles());
	for ( int i = 0; i < triangleMap.Count(); i++ )
	{
		triangleMap[i] = -1;
	}
	edgeMap.EnsureCount(pLedge->get_n_triangles()*4);	// each triangle also occupies an edge index
	for ( int i = 0; i < edgeMap.Count(); i++ )
	{
		edgeMap[i] = -1;
	}

	// we're going to reorder the triangles and edges so that the ones marked virtual 
	// appear first in the list.  This way we only need a virtual count, not a per-item
	// flag.

	// also, the edges are stored relative to the first triangle that references them
	// so an edge from 0->1 means that the first triangle that references the edge is 0->1 and the 
	// second triangle is 1->0.  This way we store half the edges and the winged edge pointers are implicit

	// sort triangles in two passes
	for ( int i = 0; i < pLedge->get_n_triangles(); i++ )
	{
		const IVP_Compact_Triangle *pTri = pLedge->get_first_triangle() + i;
		if ( pTri->get_is_virtual() )
		{
			triangleMap[i] = triangleList.AddToTail(i);
		}
	}
	pHull->vtriCount = triangleList.Count();
	for ( int i = 0; i < pLedge->get_n_triangles(); i++ )
	{
		const IVP_Compact_Triangle *pTri = pLedge->get_first_triangle() + i;
		if ( !pTri->get_is_virtual() )
		{
			triangleMap[i] = triangleList.AddToTail(i);
		}
	}
	// sort edges in two passes
	for ( int i = 0; i < pLedge->get_n_triangles(); i++ )
	{
		const IVP_Compact_Triangle *pTri = pLedge->get_first_triangle() + triangleList[i];
		for ( int j = 0; j < 3; j++ )
		{
			const IVP_Compact_Edge *pEdge = pTri->get_edge(j);
			if ( pEdge->get_is_virtual() && edgeMap[EdgeIndex(pLedge, pEdge->get_opposite())] < 0 )
			{
				edgeMap[EdgeIndex(pLedge, pEdge)] = edgeList.AddToTail(EdgeIndex(pLedge, pEdge));
			}
		}
	}
	pHull->vedgeCount = edgeList.Count();

	for ( int i = 0; i < pLedge->get_n_triangles(); i++ )
	{
		const IVP_Compact_Triangle *pTri = pLedge->get_first_triangle() + triangleList[i];
		for ( int j = 0; j < 3; j++ )
		{
			const IVP_Compact_Edge *pEdge = pTri->get_edge(j);
			int index = EdgeIndex(pLedge, pEdge);
			int oppositeIndex = EdgeIndex(pLedge, pEdge->get_opposite());
			if ( !pEdge->get_is_virtual() && edgeMap[oppositeIndex] < 0 )
			{
				edgeMap[index] = edgeList.AddToTail(index);
			}
			if ( edgeMap[index] < 0 )
			{
				Assert(edgeMap[oppositeIndex] >= 0);
				edgeMap[index] = edgeMap[oppositeIndex];
			}
		}
	}
	Assert( edgeList.Count() == pHull->edgeCount );

	// now write the packed triangles
	for ( int i = 0; i < pHull->triangleCount; i++ )
	{
		packedtriangle_t tri;
		const IVP_Compact_Triangle *pTri = pLedge->get_first_triangle() + triangleList[i];
		const IVP_Compact_Edge *pEdge;
		pEdge = pTri->get_edge(0);
		tri.opposite = triangleMap[pTri->get_pierce_index()];
		Assert(tri.opposite<pHull->triangleCount);
		tri.e0 = edgeMap[EdgeIndex(pLedge, pEdge)];
		pEdge = pTri->get_edge(1);
		tri.e1 = edgeMap[EdgeIndex(pLedge, pEdge)];
		pEdge = pTri->get_edge(2);
		tri.e2 = edgeMap[EdgeIndex(pLedge, pEdge)];
		Assert(tri.e0<pHull->edgeCount);
		Assert(tri.e1<pHull->edgeCount);
		Assert(tri.e2<pHull->edgeCount);
		buf.Put(&tri, sizeof(tri));
	}
	// now write the packed edges
	for ( int i = 0; i < pHull->edgeCount; i++ )
	{
		packededge_t edge;
		const IVP_Compact_Edge *pEdge = (const IVP_Compact_Edge *)pLedge->get_first_triangle() + edgeList[i];
		Assert((edgeList[i]&3) != 0); // must not be a triangle

		int v0 = vertMap.map[pEdge->get_start_point_index()] - pHull->baseVert;
		int v1 = vertMap.map[pEdge->get_next()->get_start_point_index()] - pHull->baseVert;
		Assert(v0>=0 && v0<256);
		Assert(v1>=0 && v1<256);
		edge.v0 = v0;
		edge.v1 = v1;
		buf.Put(&edge, sizeof(edge));
	}
}


// decompress packed hull into a compact ledge
void CVPhysicsVirtualMeshWriter::UnpackCompactLedgeFromHull( IVP_Compact_Ledge *pLedge, int materialIndex, const IVP_Compact_Poly_Point *pPointList, const virtualmeshhull_t *pHullHeader, int hullIndex, bool isVirtualLedge )
{
	const packedhull_t *pHull = pHullHeader->GetPackedHull(hullIndex);
	const packedtriangle_t *pPackedTris = pHullHeader->GetPackedTriangles(hullIndex);
	// write the ledge
	pLedge->set_offset_ledge_points( (int)((char *)pPointList - (char *)pLedge) ); // byte offset from 'this' to (ledge) point array
	pLedge->set_is_compact( IVP_TRUE );
	pLedge->set_size(sizeof(IVP_Compact_Ledge) + sizeof(IVP_Compact_Triangle)*pHull->triangleCount);	// <0 indicates a non compact compact ledge 
	pLedge->n_triangles = pHull->triangleCount;
	pLedge->has_chilren_flag = isVirtualLedge ? IVP_TRUE : IVP_FALSE;

	// Make the offset -pLedge so the result is a NULL ledgetree node - we haven't needed to create one of these as of yet
	pLedge->ledgetree_node_offset = -((int)pLedge);

	// keep track of which triangle edge referenced this edge (so the next one can swap the order and point to the first one)
	int forwardEdgeIndex[255];
	for ( int i = 0; i < pHull->edgeCount; i++ )
	{
		forwardEdgeIndex[i] = -1;
	}
	packededge_t *pPackedEdges = (packededge_t *)(pPackedTris + pHull->triangleCount);
	IVP_Compact_Triangle *pOut = pLedge->get_first_triangle();
	// now write the compact triangles and their edges
	int baseVert = pHull->baseVert;
	for ( int i = 0; i < pHull->triangleCount; i++ )
	{
		pOut[i].set_tri_index(i);
		pOut[i].set_material_index(materialIndex);
		pOut[i].set_is_virtual( i < pHull->vtriCount ? IVP_TRUE : IVP_FALSE );
		pOut[i].set_pierce_index(pPackedTris[i].opposite);
		Assert(pPackedTris[i].opposite<pHull->triangleCount);
		int edges[3] = {pPackedTris[i].e0, pPackedTris[i].e1, pPackedTris[i].e2};
		for ( int j = 0; j < 3; j++ )
		{
			Assert(edges[j]<pHull->edgeCount);
			if ( forwardEdgeIndex[edges[j]] < 0 )
			{
				// this is the first triangle to use this edge, so it's forward (and the other triangle sharing (opposite edge pointer) is unknown)
				int startVert = pPackedEdges[edges[j]].v0 + baseVert;
				pOut[i].c_three_edges[j].set_start_point_index(startVert);
				pOut[i].c_three_edges[j].set_is_virtual( edges[j] < pHull->vedgeCount ? IVP_TRUE : IVP_FALSE );
				forwardEdgeIndex[edges[j]] = EdgeIndex(pLedge, &pOut[i].c_three_edges[j]);
			}
			else
			{
				// this is the second triangle to use this edge, so it's reversed (and the other triangle sharing is in the forward edge table)
				int oppositeIndex = forwardEdgeIndex[edges[j]];

				int startVert = pPackedEdges[edges[j]].v1 + baseVert;
				pOut[i].c_three_edges[j].set_start_point_index(startVert);
				pOut[i].c_three_edges[j].set_is_virtual( edges[j] < pHull->vedgeCount ? IVP_TRUE : IVP_FALSE );
				// now build the links between the triangles sharing this edge
				int thisEdgeIndex = EdgeIndex( pLedge, &pOut[i].c_three_edges[j] );
				pOut[i].c_three_edges[j].set_opposite_index( oppositeIndex - thisEdgeIndex );
				pOut[i].c_three_edges[j].get_opposite()->set_opposite_index( thisEdgeIndex - oppositeIndex );
			}
		}
	}
}

// low-level code to initialize a 2-sided triangle
static void InitTriangle( IVP_Compact_Triangle *pTri, int index, int materialIndex, int v0, int v1, int v2, int opp0, int opp1, int opp2 )
{
	pTri->set_tri_index(index);
	pTri->set_material_index(materialIndex);

	pTri->c_three_edges[0].set_start_point_index(v0);
	pTri->c_three_edges[1].set_start_point_index(v1);
	pTri->c_three_edges[2].set_start_point_index(v2);

	pTri->c_three_edges[0].set_opposite_index(opp0);
	pTri->c_three_edges[1].set_opposite_index(opp1);
	pTri->c_three_edges[2].set_opposite_index(opp2);
}

void CVPhysicsVirtualMeshWriter::InitTwoSidedTriangleLege( triangleledge_t *pOut, const IVP_Compact_Poly_Point *pPoints, int v0, int v1, int v2, int materialIndex )
{
	IVP_Compact_Ledge *pLedge = &pOut->ledge;
	pLedge->set_offset_ledge_points( (int)((char *)pPoints - (char *)pLedge) ); // byte offset from 'this' to (ledge) point array
	pLedge->set_is_compact( IVP_TRUE );
	pLedge->set_size(sizeof(triangleledge_t));	// <0 indicates a non compact compact ledge 
	pLedge->n_triangles = 2;
	pLedge->has_chilren_flag = IVP_FALSE;
	// triangles
	InitTriangle( &pOut->faces[0], 0, materialIndex, v0, v1, v2, 6, 4, 2 );
	InitTriangle( &pOut->faces[1], 1, materialIndex, v0, v2, v1, -2, -4, -6);
	pOut->faces[0].set_pierce_index(1);
	pOut->faces[1].set_pierce_index(0);
}

bool CVPhysicsVirtualMeshWriter::LedgeCanBePacked(const IVP_Compact_Ledge *pLedge, const virtualmeshlist_t &list)
{
	int edgeCount = pLedge->get_n_triangles() * 3;
	if ( edgeCount > 512 )
		return false;
	vertmap_t vertMap;
	BuildVertMap( vertMap, list.pVerts, list.vertexCount, pLedge );
	if ( (vertMap.maxRef - vertMap.minRef) > 255 )
		return false;
	return true;
}

// this builds a packed hull array from a compact ledge array (needs the virtualmeshlist for reference)
virtualmeshhull_t *CVPhysicsVirtualMeshWriter::CreatePackedHullFromLedges( const virtualmeshlist_t &list, const IVP_Compact_Ledge **pLedges, int ledgeCount )
{
	int triCount = 0;
	int edgeCount = 0;
	for ( int i = 0; i < ledgeCount; i++ )
	{
		triCount += pLedges[i]->get_n_triangles();
		edgeCount += (pLedges[i]->get_n_triangles() * 3)/2;
		Assert(LedgeCanBePacked(pLedges[i], list));
	}

	unsigned int totalSize = sizeof(packedtriangle_t)*triCount + sizeof(packededge_t)*edgeCount + sizeof(packedhull_t)*ledgeCount + sizeof(virtualmeshhull_t);
	byte *pBuf = new byte[totalSize];

	CUtlBuffer buf;
	buf.SetExternalBuffer( pBuf, totalSize, 0, 0 );

	if ( 1 )
	{
		virtualmeshhull_t tmp;
		Q_memset( &tmp, 0, sizeof(tmp) );
		tmp.hullCount = ledgeCount;
		buf.Put(&tmp, sizeof(tmp));
	}

	// write the headers
	Assert(ledgeCount < 16);
	packedhull_t *pHulls[16];
	for ( int i = 0; i < ledgeCount; i++ )
	{
		pHulls[i] = (packedhull_t *)buf.PeekPut();
		packedhull_t hull;
		hull.triangleCount = pLedges[i]->get_n_triangles();
		hull.edgeCount = (hull.triangleCount * 3) / 2;
		buf.Put(&hull, sizeof(hull));
	}

	// write the data itself
	for ( int i = 0; i < ledgeCount; i++ )
	{
		PackLedgeIntoBuffer( pHulls[i], buf, pLedges[i], list );
	}

	return (virtualmeshhull_t *)pBuf;
}

// frees the memory associated with this packed hull
void CVPhysicsVirtualMeshWriter::DestroyPackedHull( virtualmeshhull_t *pHull )
{
	byte *pData = (byte *)pHull;
	delete[] pData;
}


unsigned int CVPhysicsVirtualMeshWriter::UnpackLedgeListFromHull( byte *pOut, virtualmeshhull_t *pHull, IVP_Compact_Poly_Point *pPoints )
{
	unsigned int memOffset = 0;
	for ( int i = 0; i < pHull->hullCount; i++ )
	{
		IVP_Compact_Ledge *pHullLedge = (IVP_Compact_Ledge *)(pOut + memOffset);
		CVPhysicsVirtualMeshWriter::UnpackCompactLedgeFromHull( pHullLedge, 0, pPoints, pHull, i, true );
		memOffset += pHullLedge->get_size();
	}
	return memOffset;
}


/*

#define DUMP_FILES 1
static bool DumpListToGLView( const char *pFilename, const virtualmeshlist_t &list )
{
#if DUMP_FILES
	FILE *fp = fopen( pFilename, "a+" );
	for ( int i = 0; i < list.triangleCount; i++ )
	{
		fprintf( fp, "3\n" );
		fprintf( fp, "%6.3f %6.3f %6.3f 1 0 0\n", list.pVerts[list.indices[i*3+0]].x, list.pVerts[list.indices[i*3+0]].y, list.pVerts[list.indices[i*3+0]].z );
		fprintf( fp, "%6.3f %6.3f %6.3f 0 1 0\n", list.pVerts[list.indices[i*3+1]].x, list.pVerts[list.indices[i*3+1]].y, list.pVerts[list.indices[i*3+1]].z );
		fprintf( fp, "%6.3f %6.3f %6.3f 0 0 1\n", list.pVerts[list.indices[i*3+2]].x, list.pVerts[list.indices[i*3+2]].y, list.pVerts[list.indices[i*3+2]].z );
	}
	fclose(fp);
#endif
	return true;
}

static bool DumpLedgeToGLView( const char *pFilename, const IVP_Compact_Ledge *pLedge, float r=1.0f, float g=1.0f, float b=1.0f, float offset=0.0f )
{
#if DUMP_FILES
	FILE *fp = fopen( pFilename, "a+" );
	int ivpIndex;
	Vector tmp[3];
	const IVP_Compact_Poly_Point *pPoints = pLedge->get_point_array();
	for ( int i = 0; i < pLedge->get_n_triangles(); i++ )
	{
		// iterate each triangle, for each referenced vert that hasn't yet been mapped, search for the nearest match
		const IVP_Compact_Triangle *pTri = pLedge->get_first_triangle() + i;
		ivpIndex = pTri->get_edge(2)->get_start_point_index();
		ConvertPositionToHL( &pPoints[ivpIndex], tmp[0] );
		ivpIndex = pTri->get_edge(1)->get_start_point_index();
		ConvertPositionToHL( &pPoints[ivpIndex], tmp[1] );
		ivpIndex = pTri->get_edge(0)->get_start_point_index();
		ConvertPositionToHL( &pPoints[ivpIndex], tmp[2] );
		tmp[0].x += offset;
		tmp[1].x += offset;
		tmp[2].x += offset;
		fprintf( fp, "2\n" );
		fprintf( fp, "%6.3f %6.3f %6.3f %.1f %.1f %.1f\n", tmp[0].x, tmp[0].y, tmp[0].z, r, g, b );
		fprintf( fp, "%6.3f %6.3f %6.3f %.1f %.1f %.1f\n", tmp[1].x, tmp[1].y, tmp[1].z, r, g, b );
		fprintf( fp, "2\n" );
		fprintf( fp, "%6.3f %6.3f %6.3f %.1f %.1f %.1f\n", tmp[1].x, tmp[1].y, tmp[1].z, r, g, b );
		fprintf( fp, "%6.3f %6.3f %6.3f %.1f %.1f %.1f\n", tmp[2].x, tmp[2].y, tmp[2].z, r, g, b );
		fprintf( fp, "2\n" );
		fprintf( fp, "%6.3f %6.3f %6.3f %.1f %.1f %.1f\n", tmp[2].x, tmp[2].y, tmp[2].z, r, g, b );
		fprintf( fp, "%6.3f %6.3f %6.3f %.1f %.1f %.1f\n", tmp[0].x, tmp[0].y, tmp[0].z, r, g, b );
	}
	fclose( fp );
#endif
	return true;
}

static int ComputeSize( virtualmeshhull_t *pHeader )
{
	packedhull_t *pHull = (packedhull_t *)(pHeader+1);
	unsigned int size = pHeader->hullCount * sizeof(IVP_Compact_Ledge);
	for ( int i = 0; i < pHeader->hullCount; i++ )
	{
		size += sizeof(IVP_Compact_Triangle) * pHull[i].triangleCount;
	}
	return size;
}

bool CVPhysicsVirtualMeshWriter::CheckHulls( virtualmeshhull_t *pHull0, virtualmeshhull_t *pHull1, const virtualmeshlist_t &list )
{
	for ( int i = 0; i < pHull0->hullCount; i++ )
	{
		const packedhull_t *pP0 = pHull0->GetPackedHull(i);
		const packedhull_t *pP1 = pHull1->GetPackedHull(i);
		Assert(pP0->triangleCount == pP1->triangleCount);
		Assert(pP0->vtriCount == pP1->vtriCount);
		Assert(pP0->edgeCount == pP1->edgeCount);
		Assert(pP0->vedgeCount == pP1->vedgeCount);
		Assert(pP0->baseVert == pP1->baseVert);
		const packedtriangle_t *pTri0 = pHull0->GetPackedTriangles( i );
		const packedtriangle_t *pTri1 = pHull1->GetPackedTriangles( i );
		for ( int j = 0; j < pP0->triangleCount; j++ )
		{
			Assert(pTri0[j].e0 == pTri1[j].e0);
			Assert(pTri0[j].e1 == pTri1[j].e1);
			Assert(pTri0[j].e2 == pTri1[j].e2);
			Assert(pTri0[j].opposite == pTri1[j].opposite);
		}
	}
	{
		int size0 = ComputeSize(pHull0);
		int pointSize0 = sizeof(IVP_Compact_Poly_Point) * list.vertexCount;
		byte *pMem0 = (byte *)ivp_malloc_aligned( size0+pointSize0, 16 );
		IVP_Compact_Poly_Point *pPoints = (IVP_Compact_Poly_Point *)pMem0;
		IVP_Compact_Ledge *pLedge0 = (IVP_Compact_Ledge *)(pPoints + list.vertexCount);
		for ( int i = 0; i < list.vertexCount; i++ )
		{
			ConvertPositionToIVP( list.pVerts[i], pPoints[i] );
		}
		UnpackLedgeListFromHull( (byte *)pLedge0, pHull0, pPoints );
		for ( int i = 0; i < pHull0->hullCount; i++ )
		{
			if ( i == i ) DumpLedgeToGLView( "c:\\jay.txt", pLedge0, 1, 0, 0, 0 );
			pLedge0 = (IVP_Compact_Ledge *)( ((byte *)pLedge0 ) + pLedge0->get_size() );
		}
		ivp_free_aligned(pMem0);
	}

	{
		int size1 = ComputeSize(pHull1);
		int pointSize1 = sizeof(IVP_Compact_Poly_Point) * list.vertexCount;
		byte *pMem1 = (byte *)ivp_malloc_aligned( size1+pointSize1, 16 );
		IVP_Compact_Poly_Point *pPoints = (IVP_Compact_Poly_Point *)pMem1;
		IVP_Compact_Ledge *pLedge1 = (IVP_Compact_Ledge *)(pPoints + list.vertexCount);
		for ( int i = 0; i < list.vertexCount; i++ )
		{
			ConvertPositionToIVP( list.pVerts[i], pPoints[i] );
		}
		UnpackLedgeListFromHull( (byte *)pLedge1, pHull1, pPoints );
		for ( int i = 0; i < pHull1->hullCount; i++ )
		{
			if ( i == i ) DumpLedgeToGLView( "c:\\jay.txt", pLedge1, 0, 1, 0, 1024 );
			pLedge1 = (IVP_Compact_Ledge *)( ((byte *)pLedge1 ) + pLedge1->get_size() );
		}
		ivp_free_aligned(pMem1);
	}
	return true;
}

*/