leocad/common/pieceinf.cpp

#include "lc_global.h"
#include "lc_math.h"
#include "lc_mesh.h"
#include "lc_colors.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include "opengl.h"
#include "texture.h"
#include "pieceinf.h"
#include "project.h"
#include "library.h"
#include "lc_application.h"

#define SIDES 16
static float sintbl[SIDES];
static float costbl[SIDES];

#define LC_MESH		1
#define LC_STUD		2
#define LC_STUD2	3
#define LC_STUD3	4
#define LC_STUD4	5

// measurements (in centimeters)
//#define LC_FLAT_HEIGHT  0.32f
//#define LC_BRICK_HEIGHT (3*LC_FLAT_HEIGHT)
//#define LC_BASEPLATE_HEIGHT (LC_FLAT_HEIGHT/2)
//#define LC_HALF_WIDE  0.4f
//#define LC_ONE_WIDE   0.8f
//#define LC_BRICK_WALL 0.125f
#define LC_STUD_HEIGHT 0.16f
#define LC_STUD_RADIUS 0.24f
#define LC_KNOB_RADIUS 0.32f
//#define LC_STUD_TECH_RADIUS (LC_FLAT_HEIGHT/2)

/////////////////////////////////////////////////////////////////////////////
// PieceInfo construction/destruction

PieceInfo::PieceInfo()
{
	m_nRef = 0;
	m_nBoxList = 0;
	mMesh = NULL;
}

PieceInfo::~PieceInfo()
{
	FreeInformation();
}

/////////////////////////////////////////////////////////////////////////////
// File I/O

void PieceInfo::LoadIndex(lcFile& file)
{
  static bool init = false;
  short sh[6];
  short scale;

  // Initialize sin/cos table
  if (!init)
  {
    for (int i = 0; i < SIDES; i++)
    {
      sintbl[i] = (float)sin((LC_2PI*i)/(SIDES));
      costbl[i] = (float)cos((LC_2PI*i)/(SIDES));
    }
    init = true;
  }

  file.ReadBuffer(m_strName, LC_PIECE_NAME_LEN);
  file.ReadBuffer(m_strDescription, 64);
  m_strDescription[64] = '\0';
  file.ReadS16(sh, 6);
  lcuint8 Flags;
  file.ReadU8(&Flags, 1);
  m_nFlags = Flags;
  lcuint32 Groups; file.ReadU32(&Groups, 1);
  file.ReadU32(&m_nOffset, 1);
  file.ReadU32(&m_nSize, 1);

  if (m_nFlags & LC_PIECE_SMALL)
    scale = 10000;
  else if (m_nFlags & LC_PIECE_MEDIUM)
    scale = 1000;
  else
    scale = 100;

  m_fDimensions[0] = (float)sh[0]/scale;
  m_fDimensions[1] = (float)sh[1]/scale;
  m_fDimensions[2] = (float)sh[2]/scale;
  m_fDimensions[3] = (float)sh[3]/scale;
  m_fDimensions[4] = (float)sh[4]/scale;
  m_fDimensions[5] = (float)sh[5]/scale;
}

void PieceInfo::CreatePlaceholder(const char* Name)
{
	strncpy(m_strName, Name, sizeof(m_strName));
	m_strName[sizeof(m_strName)-1] = 0;
	strncpy(m_strDescription, Name, sizeof(m_strDescription));
	m_strDescription[sizeof(m_strDescription)-1] = 0;

	m_nFlags = LC_PIECE_PLACEHOLDER;
	m_nOffset = 0;
	m_nSize = 0;

	m_fDimensions[0] = 0.4f;
	m_fDimensions[1] = 0.4f;
	m_fDimensions[2] = 0.16f;
	m_fDimensions[3] = -0.4f;
	m_fDimensions[4] = -0.4f;
	m_fDimensions[5] = -0.96f;
}

void PieceInfo::AddRef()
{
	if (m_nRef == 0)
		LoadInformation();
	m_nRef++;
}

void PieceInfo::DeRef()
{
	m_nRef--;
	if (m_nRef == 0)
		FreeInformation();
}

void PieceInfo::CreateBoxDisplayList()
{
	if (m_nBoxList)
		return;

	// Create a display for the bounding box.
	m_nBoxList = glGenLists(1);
	glNewList(m_nBoxList, GL_COMPILE);
	glEnableClientState(GL_VERTEX_ARRAY);

	float box[24][3] =
	{
		{ m_fDimensions[0], m_fDimensions[1], m_fDimensions[2] }, 
		{ m_fDimensions[3], m_fDimensions[1], m_fDimensions[2] },
		{ m_fDimensions[3], m_fDimensions[4], m_fDimensions[2] },
		{ m_fDimensions[0], m_fDimensions[4], m_fDimensions[2] },
		{ m_fDimensions[0], m_fDimensions[1], m_fDimensions[5] },
		{ m_fDimensions[0], m_fDimensions[4], m_fDimensions[5] },
		{ m_fDimensions[3], m_fDimensions[4], m_fDimensions[5] },
		{ m_fDimensions[3], m_fDimensions[1], m_fDimensions[5] },
		{ m_fDimensions[3], m_fDimensions[4], m_fDimensions[2] }, 
		{ m_fDimensions[3], m_fDimensions[1], m_fDimensions[2] },
		{ m_fDimensions[3], m_fDimensions[1], m_fDimensions[5] },
		{ m_fDimensions[3], m_fDimensions[4], m_fDimensions[5] },
		{ m_fDimensions[0], m_fDimensions[4], m_fDimensions[5] },
		{ m_fDimensions[0], m_fDimensions[1], m_fDimensions[5] },
		{ m_fDimensions[0], m_fDimensions[1], m_fDimensions[2] },
		{ m_fDimensions[0], m_fDimensions[4], m_fDimensions[2] }, 
		{ m_fDimensions[0], m_fDimensions[1], m_fDimensions[5] },
		{ m_fDimensions[3], m_fDimensions[1], m_fDimensions[5] },
		{ m_fDimensions[3], m_fDimensions[1], m_fDimensions[2] },
		{ m_fDimensions[0], m_fDimensions[1], m_fDimensions[2] },
		{ m_fDimensions[0], m_fDimensions[4], m_fDimensions[2] },
		{ m_fDimensions[3], m_fDimensions[4], m_fDimensions[2] },
		{ m_fDimensions[3], m_fDimensions[4], m_fDimensions[5] },
		{ m_fDimensions[0], m_fDimensions[4], m_fDimensions[5] }
	};

	glVertexPointer(3, GL_FLOAT, 0, box);
	glDrawArrays(GL_QUADS, 0, 24);
	glEndList();
}

inline lcuint16 EndianSwap(lcuint16 Val)
{
	return LCUINT16(Val);
}

inline lcuint32 EndianSwap(lcuint32 Val)
{
	return LCUINT32(Val);
}

template<typename SrcType, typename DstType>
static void WriteMeshDrawInfo(lcuint32*& Data, lcMesh* Mesh, float*& OutVertex, int* SectionIndices, lcMeshSection** DstSections)
{
	int NumColors = EndianSwap(*Data);
	Data++;

	for (int Color = 0; Color < NumColors; Color++)
	{
		int ColorIdx = lcGetColorIndex(EndianSwap(*Data));
		Data++;

		SrcType* SrcPtr = (SrcType*)Data;
		int NumQuads = EndianSwap(*SrcPtr);
		SrcPtr++;
		int NumTris = EndianSwap(*(SrcPtr + NumQuads));

		if (NumTris || NumQuads)
		{
			lcMeshSection* Section = DstSections[ColorIdx * 2 + 0];
			DstType* OutIndex = (DstType*)Mesh->mIndexBuffer.mData + Section->IndexOffset / sizeof(DstType) + Section->NumIndices;

			for (int i = 0; i < NumQuads; i += 4)
			{
				*OutIndex++ = EndianSwap(SrcPtr[0]);
				*OutIndex++ = EndianSwap(SrcPtr[1]);
				*OutIndex++ = EndianSwap(SrcPtr[2]);
				*OutIndex++ = EndianSwap(SrcPtr[0]);
				*OutIndex++ = EndianSwap(SrcPtr[2]);
				*OutIndex++ = EndianSwap(SrcPtr[3]);
				SrcPtr += 4;
			}

			SrcPtr++;

			for (int i = 0; i < NumTris; i++)
			{
				*OutIndex++ = EndianSwap(*SrcPtr);
				SrcPtr++;
			}

			Section->NumIndices += NumQuads / 4 * 6 + NumTris;
		}
		else
			SrcPtr++;

		int NumLines = EndianSwap(*SrcPtr);
		SrcPtr++;

		if (NumLines)
		{
			lcMeshSection* Section = DstSections[ColorIdx * 2 + 1];
			DstType* OutIndex = (DstType*)Mesh->mIndexBuffer.mData + Section->IndexOffset / sizeof(DstType) + Section->NumIndices;

			for (int i = 0; i < NumLines; i++)
			{
				*OutIndex++ = EndianSwap(*SrcPtr);
				SrcPtr++;
			}

			Section->NumIndices += NumLines;
		}

		Data = (lcuint32*)SrcPtr;
	}
}

template<class DstType>
static void WriteStudDrawInfo(int ColorIdx, const lcMatrix44& Mat, lcMesh* Mesh, float*& OutVertex, float Radius, int* SectionIndices, lcMeshSection** DstSections)
{
	// Build vertices.
	int BaseVertex = (OutVertex - (float*)Mesh->mVertexBuffer.mData) / 3;
	lcVector3 Vert;

	for (int i = 0; i < SIDES; i++)
	{
		Vert = lcMul31(lcVector3(Radius * costbl[i], Radius * sintbl[i], 0.0f), Mat);
		*OutVertex++ = Vert[0];
		*OutVertex++ = Vert[1];
		*OutVertex++ = Vert[2];
		Vert = lcMul31(lcVector3(Radius * costbl[i], Radius * sintbl[i], LC_STUD_HEIGHT), Mat);
		*OutVertex++ = Vert[0];
		*OutVertex++ = Vert[1];
		*OutVertex++ = Vert[2];
	}

	Vert = lcMul31(lcVector3(0.0f, 0.0f, LC_STUD_HEIGHT), Mat);
	*OutVertex++ = Vert[0];
	*OutVertex++ = Vert[1];
	*OutVertex++ = Vert[2];

	int v0 = BaseVertex + 2 * SIDES;

	// Triangles.
	lcMeshSection* Section = DstSections[ColorIdx * 2 + 0];
	DstType* OutIndex = (DstType*)Mesh->mIndexBuffer.mData + Section->IndexOffset / sizeof(DstType) + Section->NumIndices;

	for (int i = 0; i < SIDES; i++)
	{
		int i1 = BaseVertex + (i % SIDES) * 2;
		int i2 = BaseVertex + ((i + 1) % SIDES) * 2;

		int v1 = i1;
		int v2 = i1 + 1;
		int v3 = i2;
		int v4 = i2 + 1;

		*OutIndex++ = v0;
		*OutIndex++ = v2;
		*OutIndex++ = v4;

		*OutIndex++ = v1;
		*OutIndex++ = v3;
		*OutIndex++ = v2;

		*OutIndex++ = v3;
		*OutIndex++ = v4;
		*OutIndex++ = v2;
	}

	Section->NumIndices += 9 * SIDES;

	// Lines.
	Section = DstSections[gEdgeColor * 2 + 1];
	OutIndex = (DstType*)Mesh->mIndexBuffer.mData + Section->IndexOffset / sizeof(DstType) + Section->NumIndices;

	for (int i = 0; i < SIDES; i++)
	{
		int i1 = BaseVertex + (i % SIDES) * 2;
		int i2 = BaseVertex + ((i + 1) % SIDES) * 2;

		int v1 = i1;
		int v2 = i1 + 1;
		int v3 = i2;
		int v4 = i2 + 1;

		*OutIndex++ = v1;
		*OutIndex++ = v3;

		*OutIndex++ = v2;
		*OutIndex++ = v4;
	}

	Section->NumIndices += 4 * SIDES;
}

template<class DstType>
static void WriteHollowStudDrawInfo(int ColorIdx, const lcMatrix44& Mat, lcMesh* Mesh, float*& OutVertex, float InnerRadius, float OuterRadius, int* SectionIndices, lcMeshSection** DstSections)
{
	// Build vertices.
	int BaseVertex = (OutVertex - (float*)Mesh->mVertexBuffer.mData) / 3;
	lcVector3 Vert;

	for (int i = 0; i < SIDES; i++)
	{
		// Outside.
		Vert = lcMul31(lcVector3(OuterRadius * costbl[i], OuterRadius * sintbl[i], 0.0f), Mat);
		*OutVertex++ = Vert[0];
		*OutVertex++ = Vert[1];
		*OutVertex++ = Vert[2];
		Vert = lcMul31(lcVector3(OuterRadius * costbl[i], OuterRadius * sintbl[i], LC_STUD_HEIGHT), Mat);
		*OutVertex++ = Vert[0];
		*OutVertex++ = Vert[1];
		*OutVertex++ = Vert[2];

		// Inside.
		Vert = lcMul31(lcVector3(InnerRadius * costbl[i], InnerRadius * sintbl[i], LC_STUD_HEIGHT), Mat);
		*OutVertex++ = Vert[0];
		*OutVertex++ = Vert[1];
		*OutVertex++ = Vert[2];
		Vert = lcMul31(lcVector3(InnerRadius * costbl[i], InnerRadius * sintbl[i], 0.0f), Mat);
		*OutVertex++ = Vert[0];
		*OutVertex++ = Vert[1];
		*OutVertex++ = Vert[2];
	}

	// Triangles.
	lcMeshSection* Section = DstSections[ColorIdx * 2 + 0];
	DstType* OutIndex = (DstType*)Mesh->mIndexBuffer.mData + Section->IndexOffset / sizeof(DstType) + Section->NumIndices;

	for (int i = 0; i < SIDES; i++)
	{
		int i1 = BaseVertex + (i % SIDES) * 4;
		int i2 = BaseVertex + ((i + 1) % SIDES) * 4;

		int v1 = i1;
		int v2 = i1 + 1;
		int v3 = i1 + 2;
		int v4 = i1 + 3;
		int v5 = i2;
		int v6 = i2 + 1;
		int v7 = i2 + 2;
		int v8 = i2 + 3;

		*OutIndex++ = v1;
		*OutIndex++ = v5;
		*OutIndex++ = v2;

		*OutIndex++ = v5;
		*OutIndex++ = v6;
		*OutIndex++ = v2;

		*OutIndex++ = v2;
		*OutIndex++ = v6;
		*OutIndex++ = v3;

		*OutIndex++ = v6;
		*OutIndex++ = v7;
		*OutIndex++ = v3;

		*OutIndex++ = v3;
		*OutIndex++ = v7;
		*OutIndex++ = v4;

		*OutIndex++ = v7;
		*OutIndex++ = v8;
		*OutIndex++ = v4;
	}

	Section->NumIndices += 18 * SIDES;

	// Lines.
	Section = DstSections[gEdgeColor * 2 + 1];
	OutIndex = (DstType*)Mesh->mIndexBuffer.mData + Section->IndexOffset / sizeof(DstType) + Section->NumIndices;

	for (int i = 0; i < SIDES; i++)
	{
		int i1 = BaseVertex + (i % SIDES) * 4;
		int i2 = BaseVertex + ((i + 1) % SIDES) * 4;

		int v1 = i1;
		int v2 = i1 + 1;
		int v3 = i1 + 2;
		int v4 = i1 + 3;
		int v5 = i2;
		int v6 = i2 + 1;
		int v7 = i2 + 2;
		int v8 = i2 + 3;

		*OutIndex++ = v1;
		*OutIndex++ = v5;

		*OutIndex++ = v2;
		*OutIndex++ = v6;

		*OutIndex++ = v3;
		*OutIndex++ = v7;

		*OutIndex++ = v4;
		*OutIndex++ = v8;
	}

	Section->NumIndices += 8 * SIDES;
}

template<typename DstType>
void PieceInfo::BuildMesh(void* Data, int* SectionIndices)
{
	// Create empty sections.
	lcMeshSection** DstSections = new lcMeshSection*[gColorList.GetSize() * 2];
	memset(DstSections, 0, sizeof(DstSections[0]) * gColorList.GetSize() * 2);

	int IndexOffset = 0;
	int NumSections = 0;

	for (int ColorIdx = 0; ColorIdx < gColorList.GetSize(); ColorIdx++)
	{
		if (SectionIndices[ColorIdx * 2 + 0])
		{
			lcMeshSection* Section = &mMesh->mSections[NumSections];
			DstSections[ColorIdx * 2 + 0] = Section;

			Section->PrimitiveType = GL_TRIANGLES;
			Section->ColorIndex = ColorIdx;
			Section->IndexOffset = IndexOffset;
			Section->NumIndices = 0;

			IndexOffset += SectionIndices[ColorIdx * 2 + 0] * sizeof(DstType);
			NumSections++;

			if (ColorIdx == gDefaultColor)
				m_nFlags |= LC_PIECE_HAS_DEFAULT;
			else
			{
				if (lcIsColorTranslucent(ColorIdx))
					m_nFlags |= LC_PIECE_HAS_TRANSLUCENT;
				else
					m_nFlags |= LC_PIECE_HAS_SOLID;
			}
		}

		if (SectionIndices[ColorIdx * 2 + 1])
		{
			lcMeshSection* Section = &mMesh->mSections[NumSections];
			DstSections[ColorIdx * 2 + 1] = Section;

			Section->PrimitiveType = GL_LINES;
			Section->ColorIndex = ColorIdx;
			Section->IndexOffset = IndexOffset;
			Section->NumIndices = 0;

			IndexOffset += SectionIndices[ColorIdx * 2 + 1] * sizeof(DstType);
			NumSections++;

			m_nFlags |= LC_PIECE_HAS_LINES;
		}
	}

	// Read groups
	lcuint32* longs = (lcuint32*)Data;
	int NumVertices = LCUINT32(*longs);
	float* OutVertex = (float*)mMesh->mVertexBuffer.mData + NumVertices * 3;
	lcuint8* bytes = (lcuint8*)(longs + 1);
	bytes += NumVertices * sizeof(lcint16) * 3;

	lcuint16 ConnectionCount = LCUINT16(*((lcuint16*)bytes));
	bytes += 2 + (1 + 6 * 2) * ConnectionCount;
	bytes++; // TextureCount 
	lcuint16 GroupCount = LCUINT16(*((lcuint16*)bytes));
	bytes += sizeof(lcuint16);

	while (GroupCount--)
	{
		bytes += 1 + 2 * *bytes;
		lcuint32* info = (lcuint32*)bytes;
		lcuint32 type = *info;

		switch (type)
		{
		case LC_MESH:
			{
				info++;

				if (m_nFlags & LC_PIECE_LONGDATA_FILE)
					WriteMeshDrawInfo<lcuint32, DstType>(info, mMesh, OutVertex, SectionIndices, DstSections);
				else
					WriteMeshDrawInfo<lcuint16, DstType>(info, mMesh, OutVertex, SectionIndices, DstSections);
			} break;

		case LC_STUD:
		case LC_STUD3:
			{
				info++;
				int ColorIdx = lcGetColorIndex(LCUINT32(*info));
				float* MatFloats = (float*)(info + 1);
				info += 1 + 12;

				for (int i = 0; i < 12; i++)
					MatFloats[i] = LCFLOAT(MatFloats[i]);

				lcMatrix44 Mat(lcVector4(MatFloats[0], MatFloats[1], MatFloats[2], 0.0f),
				               lcVector4(MatFloats[3], MatFloats[4], MatFloats[5], 0.0f),
				               lcVector4(MatFloats[6], MatFloats[7], MatFloats[8], 0.0f),
				               lcVector4(MatFloats[9], MatFloats[10], MatFloats[11], 1.0f));

				if (type == LC_STUD)
					WriteStudDrawInfo<DstType>(ColorIdx, Mat, mMesh, OutVertex, LC_STUD_RADIUS, SectionIndices, DstSections);
				else
					WriteStudDrawInfo<DstType>(ColorIdx, Mat, mMesh, OutVertex, 0.16f, SectionIndices, DstSections);
			} break;

		case LC_STUD2:
		case LC_STUD4:
			{
				info++;
				int ColorIdx = lcGetColorIndex(LCUINT32(*info));
				float* MatFloats = (float*)(info + 1);
				info += 1 + 12;

				for (int i = 0; i < 12; i++)
					MatFloats[i] = LCFLOAT(MatFloats[i]);

				lcMatrix44 Mat(lcVector4(MatFloats[0], MatFloats[1], MatFloats[2], 0.0f),
				               lcVector4(MatFloats[3], MatFloats[4], MatFloats[5], 0.0f),
				               lcVector4(MatFloats[6], MatFloats[7], MatFloats[8], 0.0f),
				               lcVector4(MatFloats[9], MatFloats[10], MatFloats[11], 1.0f));

				if (type == LC_STUD2)
					WriteHollowStudDrawInfo<DstType>(ColorIdx, Mat, mMesh, OutVertex, 0.16f, LC_STUD_RADIUS, SectionIndices, DstSections);
				else
					WriteHollowStudDrawInfo<DstType>(ColorIdx, Mat, mMesh, OutVertex, LC_STUD_RADIUS, 0.32f, SectionIndices, DstSections);
			} break;
		}

		info++; // should be 0
		bytes = (lcuint8*)info;
	}

	delete[] DstSections;
}

void PieceInfo::LoadInformation()
{
	if (m_nFlags & LC_PIECE_PLACEHOLDER)
	{
		mMesh = new lcMesh();
		mMesh->CreateBox();
		return;
	}

	lcDiskFile bin;
	char filename[LC_MAXPATH];
	void* buf;
	lcuint32 verts, *longs, fixverts;
	lcuint8 *bytes, *tmp, bt;
	float scale, shift;
	lcint16* shorts;

	FreeInformation();

	// Open pieces.bin and buffer the information we need.
	strcpy (filename, lcGetPiecesLibrary()->GetLibraryPath());
	strcat (filename, "pieces.bin");
	if (!bin.Open (filename, "rb"))
		return;

	buf = malloc(m_nSize);
	bin.Seek(m_nOffset, SEEK_SET);
	bin.ReadBuffer(buf, m_nSize);

	shift  = 1.0f/(1<<14);
	scale = 0.01f;
	if (m_nFlags & LC_PIECE_MEDIUM) scale = 0.001f;
	if (m_nFlags & LC_PIECE_SMALL)  scale = 0.0001f;
	longs = (lcuint32*)buf;
	fixverts = verts = LCUINT32(*longs);
	bytes = (unsigned char*)(longs + 1);
	bytes += verts * sizeof(lcint16) * 3;

	lcuint16 ConnectionCount = LCUINT16(*((lcuint16*)bytes));
	bytes += 2 + (1 + 6 * 2) * ConnectionCount;
	bytes++; // TextureCount

	// Read groups.
	lcuint16 GroupCount = LCUINT16(*((lcuint16*)bytes));
	bytes += sizeof(lcuint16);

	// Count sections, vertices and indices.
	tmp = bytes;

	int NumSections = 0;
	int NumVertices = fixverts;
	int NumIndices = 0;
	ObjArray<int> SectionIndices(gColorList.GetSize() * 2);
	SectionIndices.SetSize(gColorList.GetSize() * 2);
	memset(&SectionIndices[0], 0, SectionIndices.GetSize() * sizeof(int));

	while (GroupCount--)
	{
		bt = *bytes;
		bytes++;
		bytes += bt*sizeof(lcuint16);

		lcuint32* info = (lcuint32*)bytes;

		while (*info)
		{
			if (*info == LC_MESH)
			{
				info++;
				lcuint32 NumColors = LCUINT32(*info);
				info++;

				while (NumColors--)
				{
					int ColorIndex = lcGetColorIndex(LCUINT32(*info));
					info++;

					if (SectionIndices.GetSize() < (ColorIndex + 1) * 2)
					{
						int OldSize = SectionIndices.GetSize();
						SectionIndices.SetSize((ColorIndex + 1) * 2);
						memset(&SectionIndices[OldSize], 0, (SectionIndices.GetSize() - OldSize) * sizeof(int));
					}

					if (m_nFlags & LC_PIECE_LONGDATA_FILE)
					{
						lcuint32* Indices = (lcuint32*)info;
						int Triangles = LCUINT32(*Indices) / 4 * 6;
						Indices += LCUINT32(*Indices) + 1;
						Triangles += LCUINT32(*Indices);
						Indices += LCUINT32(*Indices) + 1;

						if (Triangles)
						{
							if (!SectionIndices[ColorIndex * 2 + 0])
								NumSections++;

							SectionIndices[ColorIndex * 2 + 0] += Triangles;
							NumIndices += Triangles;
						}

						int Lines = LCUINT32(*Indices);
						Indices += LCUINT32(*Indices) + 1;

						if (Lines)
						{
							if (!SectionIndices[ColorIndex * 2 + 1])
								NumSections++;

							SectionIndices[ColorIndex * 2 + 1] += Lines;
							NumIndices += Lines;
						}

						info = (lcuint32*)Indices;
					}
					else
					{
						lcuint16* Indices = (lcuint16*)info;
						int Triangles = LCUINT16(*Indices) / 4 * 6;
						Indices += LCUINT16(*Indices) + 1;
						Triangles += LCUINT16(*Indices);
						Indices += LCUINT16(*Indices) + 1;

						if (Triangles)
						{
							if (!SectionIndices[ColorIndex * 2 + 0])
								NumSections++;

							SectionIndices[ColorIndex * 2 + 0] += Triangles;
							NumIndices += Triangles;
						}

						int Lines = LCUINT16(*Indices);
						Indices += LCUINT16(*Indices) + 1;

						if (Lines)
						{
							if (!SectionIndices[ColorIndex * 2 + 1])
								NumSections++;

							SectionIndices[ColorIndex * 2 + 1] += Lines;
							NumIndices += Lines;
						}

						info = (lcuint32*)Indices;
					}
				}
			}
			else if ((*info == LC_STUD) || (*info == LC_STUD3))
			{
				info++;
				int ColorIndex = lcGetColorIndex(LCUINT32(*info));
				info += 1 + 12;

				NumVertices += (2 * SIDES) + 1;

				if (!SectionIndices[ColorIndex * 2 + 0])
					NumSections++;

				SectionIndices[ColorIndex * 2 + 0] += 9 * SIDES;
				NumIndices += 9 * SIDES;

				if (!SectionIndices[gEdgeColor * 2 + 1])
					NumSections++;

				SectionIndices[gEdgeColor * 2 + 1] += 4 * SIDES;
				NumIndices += 4 * SIDES;
			}
			else if ((*info == LC_STUD2) || (*info == LC_STUD4))
			{
				info++;
				int ColorIndex = lcGetColorIndex(LCUINT32(*info));
				info += 1 + 12;

				NumVertices += 4 * SIDES;

				if (!SectionIndices[ColorIndex * 2 + 0])
					NumSections++;

				SectionIndices[ColorIndex * 2 + 0] += 18 * SIDES;
				NumIndices += 18 * SIDES;

				if (!SectionIndices[gEdgeColor * 2 + 1])
					NumSections++;

				SectionIndices[gEdgeColor * 2 + 1] += 8 * SIDES;
				NumIndices += 8 * SIDES;
			}
		}

		info++; // should be 0
		bytes = (lcuint8*)info;
	}

	mMesh = new lcMesh();
	mMesh->Create(NumSections, NumVertices, NumIndices);

	float* OutVertex = (float*)mMesh->mVertexBuffer.mData;

	shorts = (lcint16*)(longs + 1);
	for (verts = 0; verts < LCUINT32(*longs); verts++)
	{
		*OutVertex++ = (float)LCINT16(*shorts)*scale;
		shorts++;
		*OutVertex++ = (float)LCINT16(*shorts)*scale;
		shorts++;
		*OutVertex++ = (float)LCINT16(*shorts)*scale;
		shorts++;
	}

	if (NumVertices < 0x10000)
		BuildMesh<GLushort>(buf, &SectionIndices[0]);
	else
		BuildMesh<GLuint>(buf, &SectionIndices[0]);

	mMesh->UpdateBuffers();

	free(buf);
}

void PieceInfo::FreeInformation()
{
	delete mMesh;
	mMesh = NULL;

	if (m_nBoxList != 0)
		glDeleteLists(m_nBoxList, 1);
	m_nBoxList = 0;
}

// Zoom extents for the preview window and print catalog
void PieceInfo::ZoomExtents(float Fov, float Aspect, float* EyePos) const
{
	lcVector3 Points[8] =
	{
		lcVector3(m_fDimensions[0], m_fDimensions[1], m_fDimensions[5]),
		lcVector3(m_fDimensions[3], m_fDimensions[1], m_fDimensions[5]),
		lcVector3(m_fDimensions[0], m_fDimensions[1], m_fDimensions[2]),
		lcVector3(m_fDimensions[3], m_fDimensions[4], m_fDimensions[5]),
		lcVector3(m_fDimensions[3], m_fDimensions[4], m_fDimensions[2]),
		lcVector3(m_fDimensions[0], m_fDimensions[4], m_fDimensions[2]),
		lcVector3(m_fDimensions[0], m_fDimensions[4], m_fDimensions[5]),
		lcVector3(m_fDimensions[3], m_fDimensions[1], m_fDimensions[2])
	};

	lcVector3 Center(GetCenter());
	lcVector3 Position;

	if (EyePos)
		Position = lcVector3(EyePos[0], EyePos[1], EyePos[2]);
	else
		Position = lcVector3(-10.0f, -10.0f, 5.0f);
	Position += Center;

	lcMatrix44 Projection = lcMatrix44Perspective(30.0f, Aspect, 1.0f, 100.0f);
	lcMatrix44 ModelView = lcMatrix44LookAt(Position, Center, lcVector3(0, 0, 1));
	Position = lcZoomExtents(Position, ModelView, Projection, Points, 8);

	glMatrixMode(GL_PROJECTION);
	glLoadMatrixf(Projection);
	glMatrixMode(GL_MODELVIEW);
	glLoadMatrixf(lcMatrix44LookAt(Position, Center, lcVector3(0, 0, 1)));

	if (EyePos)
	{
		EyePos[0] = Position[0];
		EyePos[1] = Position[1];
		EyePos[2] = Position[2];
	}
}

void PieceInfo::RenderPiece(int nColor)
{
	mMesh->Render(nColor, false, false);
}