Renegade/Code/ww3d2/part_ldr.cpp

/*
**	Command & Conquer Renegade(tm)
**	Copyright 2025 Electronic Arts Inc.
**
**	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 3 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, see <http://www.gnu.org/licenses/>.
*/

/***********************************************************************************************
 ***              C O N F I D E N T I A L  ---  W E S T W O O D  S T U D I O S               ***
 ***********************************************************************************************
 *                                                                                             *
 *                 Project Name : WW3D                                                         *
 *                                                                                             *
 *                     $Archive:: /VSS_Sync/ww3d2/part_ldr.cpp              $*
 *                                                                                             *
 *                       Author:: Patrick Smith                                                
 *                                                                                             *
 *                     $Modtime:: 10/26/01 2:57p                                              $*
 *                                                                                             *
 *                    $Revision:: 11                                                          $*
 *                                                                                             *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */


#include "part_ldr.h"
#include "part_emt.h"
#include "w3derr.h"
#include "chunkio.h"
#include "win.h"		// for lstrcpy, can this be improved?
#include "assetmgr.h"
#include "texture.h"

#ifndef SAFE_DELETE
#define SAFE_DELETE(pointer) \
{ \
	if (pointer) {	\
		delete pointer; \
		pointer = 0; \
	} \
}
#endif //SAFE_DELETE

#ifndef SAFE_DELETE_ARRAY
#define SAFE_DELETE_ARRAY(pointer)	\
	if (pointer) {					\
		delete [] pointer;			\
		pointer = 0;				\
	}									\

#endif //SAFE_DELETE


///////////////////////////////////////////////////////////////////////////////////
//
//	Global variable initialization
//
ParticleEmitterLoaderClass	_ParticleEmitterLoader;

//	This array is declared in "W3D_File.H"
const char *EMITTER_TYPE_NAMES[EMITTER_TYPEID_COUNT] = 
{
	"Default"
};


///////////////////////////////////////////////////////////////////////////////////
//
//	ParticleEmitterDefClass
//
ParticleEmitterDefClass::ParticleEmitterDefClass (void)
	:	m_pName (NULL),
		m_Version (0L),
		m_pUserString (NULL),	  
		m_iUserType (EMITTER_TYPEID_DEFAULT),
		m_InitialOrientationRandom (0),
		m_pCreationVolume (NULL),
		m_pVelocityRandomizer (NULL)
{
	::memset (&m_Info, 0, sizeof (m_Info));
	::memset (&m_InfoV2, 0, sizeof (m_InfoV2));	

	::memset (&m_ColorKeyframes, 0, sizeof (m_ColorKeyframes));
	::memset (&m_OpacityKeyframes, 0, sizeof (m_OpacityKeyframes));
	::memset (&m_SizeKeyframes, 0, sizeof (m_SizeKeyframes));
	::memset (&m_RotationKeyframes, 0, sizeof (m_RotationKeyframes));
	::memset (&m_FrameKeyframes, 0, sizeof (m_FrameKeyframes));
	::memset (&m_BlurTimeKeyframes, 0, sizeof (m_BlurTimeKeyframes));
	::memset (&m_LineProperties, 0, sizeof (m_LineProperties));
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	ParticleEmitterDefClass
//
ParticleEmitterDefClass::ParticleEmitterDefClass (const ParticleEmitterDefClass &src)
	:	m_pName (NULL),
		m_Version (0L),
		m_pUserString (NULL),	  
		m_iUserType (EMITTER_TYPEID_DEFAULT),
		m_InitialOrientationRandom (src.m_InitialOrientationRandom),
		m_pCreationVolume (NULL),
		m_pVelocityRandomizer (NULL)
{
	::memset (&m_Info, 0, sizeof (m_Info));
	::memset (&m_InfoV2, 0, sizeof (m_InfoV2));	

	::memset (&m_ColorKeyframes, 0, sizeof (m_ColorKeyframes));
	::memset (&m_OpacityKeyframes, 0, sizeof (m_OpacityKeyframes));
	::memset (&m_SizeKeyframes, 0, sizeof (m_SizeKeyframes));
	::memset (&m_RotationKeyframes, 0, sizeof (m_RotationKeyframes));
	::memset (&m_FrameKeyframes, 0, sizeof (m_FrameKeyframes));
	::memset (&m_BlurTimeKeyframes, 0, sizeof (m_BlurTimeKeyframes));
	::memset (&m_LineProperties, 0, sizeof (m_LineProperties));

	(*this) = src;
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	~ParticleEmitterDefClass
//
ParticleEmitterDefClass::~ParticleEmitterDefClass (void)
{
	// Free the name buffer if necessary
	if (m_pName != NULL) {
		
		// free() is used because the buffer was allocated with ::_strdup().
		::free (m_pName);
		m_pName = NULL;
	}	

	// Free the user-string buffer if necessary
	if (m_pUserString != NULL) {
		
		// free() is used because the buffer was allocated with ::malloc() or ::_strdup().
		::free (m_pUserString);
		m_pUserString = NULL;
	}

	Free_Props ();

	SAFE_DELETE (m_pCreationVolume);
	SAFE_DELETE (m_pVelocityRandomizer);
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	ParticleEmitterDefClass
//
const ParticleEmitterDefClass &
ParticleEmitterDefClass::operator= (const ParticleEmitterDefClass &src)
{
	//
	//	Copy the user structures
	//
	Set_Name (src.Get_Name ());
	Set_User_String (src.Get_User_String ());
	Set_User_Type (src.Get_User_Type ());
	m_Version = src.m_Version;

	//
	//	Copy the information structures
	//
	::memcpy (&m_Info, &src.m_Info, sizeof (m_Info));
	::memcpy (&m_InfoV2, &src.m_InfoV2, sizeof (m_InfoV2));
	::memcpy (&m_LineProperties, &src.m_LineProperties, sizeof(m_LineProperties));

	//
	//	Copy the keyframes
	//
	Free_Props ();
	::Copy_Emitter_Property_Struct (m_ColorKeyframes, src.m_ColorKeyframes);
	::Copy_Emitter_Property_Struct (m_OpacityKeyframes, src.m_OpacityKeyframes);
	::Copy_Emitter_Property_Struct (m_SizeKeyframes, src.m_SizeKeyframes);
	::Copy_Emitter_Property_Struct (m_RotationKeyframes, src.m_RotationKeyframes);
	::Copy_Emitter_Property_Struct (m_FrameKeyframes, src.m_FrameKeyframes);
	::Copy_Emitter_Property_Struct (m_BlurTimeKeyframes, src.m_BlurTimeKeyframes);
	m_InitialOrientationRandom = src.m_InitialOrientationRandom;

	//
	//	Create the randomizers
	//
	SAFE_DELETE (m_pCreationVolume);
	SAFE_DELETE (m_pVelocityRandomizer);
	m_pCreationVolume			= Create_Randomizer (m_InfoV2.CreationVolume);
	m_pVelocityRandomizer	= Create_Randomizer (m_InfoV2.VelRandom);
	return (*this);
}

///////////////////////////////////////////////////////////////////////////////////
//
//	Free_Props
//
void
ParticleEmitterDefClass::Free_Props (void)
{
	m_ColorKeyframes.NumKeyFrames = 0;
	m_OpacityKeyframes.NumKeyFrames = 0;
	m_SizeKeyframes.NumKeyFrames = 0;
	m_RotationKeyframes.NumKeyFrames = 0;
	m_FrameKeyframes.NumKeyFrames = 0;
	m_BlurTimeKeyframes.NumKeyFrames = 0;

	SAFE_DELETE_ARRAY (m_ColorKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_ColorKeyframes.Values);
	SAFE_DELETE_ARRAY (m_OpacityKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_OpacityKeyframes.Values);
	SAFE_DELETE_ARRAY (m_SizeKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_SizeKeyframes.Values);
	SAFE_DELETE_ARRAY (m_RotationKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_RotationKeyframes.Values);
	SAFE_DELETE_ARRAY (m_FrameKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_FrameKeyframes.Values);
	SAFE_DELETE_ARRAY (m_BlurTimeKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_BlurTimeKeyframes.Values);

	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Velocity_Random
//
void							
ParticleEmitterDefClass::Set_Velocity_Random (Vector3Randomizer *randomizer)
{
	SAFE_DELETE (m_pVelocityRandomizer);
	m_pVelocityRandomizer = randomizer;

	//
	//	Ensure our persistent structure is up-to-date so it will save correctly
	//
	if (m_pVelocityRandomizer != NULL) {
		Initialize_Randomizer_Struct (*m_pVelocityRandomizer, m_InfoV2.VelRandom);
	}

	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Creation_Volume
//
void							
ParticleEmitterDefClass::Set_Creation_Volume (Vector3Randomizer *randomizer)
{
	SAFE_DELETE (m_pCreationVolume);
	m_pCreationVolume = randomizer;

	//
	//	Ensure our persistent structure is up-to-date so it will save correctly
	//
	if (m_pCreationVolume != NULL) {
		Initialize_Randomizer_Struct (*m_pCreationVolume, m_InfoV2.CreationVolume);		
	}

	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Set_User_String
//
void							
ParticleEmitterDefClass::Set_User_String (const char *pstring)		
{ 
	SAFE_FREE (m_pUserString); 
	m_pUserString = ::_strdup (pstring); 
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Name
//
void							
ParticleEmitterDefClass::Set_Name (const char *pname)			
{ 
	SAFE_FREE (m_pName); 
	m_pName = ::_strdup (pname); 
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Texture_Filename
//
void							
ParticleEmitterDefClass::Set_Texture_Filename (const char *pname)	
{ 
	::lstrcpy (m_Info.TextureFilename, pname); 
	Normalize_Filename (); 
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Normalize_Filename
//
void
ParticleEmitterDefClass::Normalize_Filename (void)
{	
	TCHAR path[MAX_PATH];
	::lstrcpy (path, m_Info.TextureFilename);

	// Find the last occurance of the directory deliminator
	LPCTSTR filename = ::strrchr (path, '\\');
	if (filename != NULL) {
		
		// Increment past the directory deliminator
		filename ++;

		// Now copy the filename protion of the path to the structure
		::lstrcpy (m_Info.TextureFilename, filename);
	}

	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Load
//
WW3DErrorType
ParticleEmitterDefClass::Load_W3D (ChunkLoadClass &chunk_load)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_LOAD_FAILED;
	Initialize_To_Ver2 ();

	// Attempt to read the different sections of the emitter definition
	if ((Read_Header (chunk_load) == WW3D_ERROR_OK) &&
		 (Read_User_Data (chunk_load) == WW3D_ERROR_OK) &&
		 (Read_Info (chunk_load) == WW3D_ERROR_OK)) {
		
		if (m_Version > 0x00010000) {
			
			//
			// Read the version 2.0 structures from the chunk
			//
			if ((Read_InfoV2 (chunk_load) == WW3D_ERROR_OK) &&
				 (Read_Props (chunk_load) == WW3D_ERROR_OK)) {

				// Success!
				ret_val = WW3D_ERROR_OK;
			}
		} else {

			// Make sure the data fits version 2
			Convert_To_Ver2 ();
			ret_val = WW3D_ERROR_OK;
		}
	}

	// (gth) Handle all future additions to the particle emitter file format
	// in the typical chunk fashion.  
	while (chunk_load.Open_Chunk() && ret_val == WW3D_ERROR_OK) {
		
		switch (chunk_load.Cur_Chunk_ID()) 
		{
			case W3D_CHUNK_EMITTER_LINE_PROPERTIES:
				ret_val = Read_Line_Properties(chunk_load);
				break;
			
			case W3D_CHUNK_EMITTER_ROTATION_KEYFRAMES:
				ret_val = Read_Rotation_Keyframes(chunk_load);
				break;

			case W3D_CHUNK_EMITTER_FRAME_KEYFRAMES:
				ret_val = Read_Frame_Keyframes(chunk_load);
				break;

			case W3D_CHUNK_EMITTER_BLUR_TIME_KEYFRAMES:
				ret_val = Read_Blur_Time_Keyframes(chunk_load);
				break;
				
			default: 
				WWDEBUG_SAY(("Unhandled Chunk! File: %s Line: %d\r\n",__FILE__,__LINE__));
				break;
		}
		
		chunk_load.Close_Chunk();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Initialize_To_Ver2
//
void
ParticleEmitterDefClass::Initialize_To_Ver2 (void)
{
	::memset (&m_Info, 0, sizeof (m_Info));
	::memset (&m_InfoV2, 0, sizeof (m_InfoV2));
	
	//
	//	Set the version 2 values using defaults from version 1
	//
	m_InfoV2.BurstSize = 1;
	m_InfoV2.OutwardVel = 0;
	m_InfoV2.VelInherit = 0;
	W3dUtilityClass::Convert_Shader (ShaderClass::_PresetAdditiveSpriteShader, &m_InfoV2.Shader);	
	
	m_InfoV2.CreationVolume.ClassID = Vector3Randomizer::CLASSID_SOLIDBOX;
	m_InfoV2.CreationVolume.Value1 = 0;
	m_InfoV2.CreationVolume.Value2 = 0;
	m_InfoV2.CreationVolume.Value3 = 0;

	m_InfoV2.VelRandom.ClassID = Vector3Randomizer::CLASSID_SOLIDBOX;
	m_InfoV2.VelRandom.Value1 = 0;
	m_InfoV2.VelRandom.Value2 = 0;
	m_InfoV2.VelRandom.Value3 = 0;
	
	Free_Props ();
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Convert_To_Ver2
//
void
ParticleEmitterDefClass::Convert_To_Ver2 (void)
{
	if (m_Version < 0x00020000) {		
		m_InfoV2.BurstSize = 1;
		m_InfoV2.OutwardVel = 0;
		m_InfoV2.VelInherit = 0;		

		//
		//	Determine which shader to use...
		//
		ShaderClass shader = ShaderClass::_PresetAdditiveSpriteShader;
		TextureClass *ptexture = WW3DAssetManager::Get_Instance ()->Get_Texture (m_Info.TextureFilename);
		if (ptexture != NULL) {
			// If texture has an alpha channel do alpha blending instead of additive
			// (which is the default for point groups):
//			SurfaceClass::SurfaceDescription surf_desc;
//			::ZeroMemory(&surf_desc, sizeof(SurfaceClass::SurfaceDescription));
//			ptexture->Get_Level_Description(surf_desc);
//			if (Has_Alpha(surf_desc.Format)) {
			if (Has_Alpha(ptexture->Get_Texture_Format())) {
				shader = ShaderClass::_PresetAlphaSpriteShader;
			}
			ptexture->Release_Ref();
		}
		W3dUtilityClass::Convert_Shader (shader, &m_InfoV2.Shader);

				
		//
		//	Convert the randomziers
		//
		m_InfoV2.CreationVolume.ClassID = Vector3Randomizer::CLASSID_SOLIDBOX;
		m_InfoV2.CreationVolume.Value1 = m_Info.PositionRandom / 1000.0f;
		m_InfoV2.CreationVolume.Value2 = m_Info.PositionRandom / 1000.0f;
		m_InfoV2.CreationVolume.Value3 = m_Info.PositionRandom / 1000.0f;

		m_InfoV2.VelRandom.ClassID = Vector3Randomizer::CLASSID_SOLIDBOX;
		m_InfoV2.VelRandom.Value1 = m_Info.VelocityRandom;
		m_InfoV2.VelRandom.Value2 = m_Info.VelocityRandom;
		m_InfoV2.VelRandom.Value3 = m_Info.VelocityRandom;

		//
		//	Recreate the randomizers
		//
		SAFE_DELETE (m_pCreationVolume);
		SAFE_DELETE (m_pVelocityRandomizer);
		m_pCreationVolume = Create_Randomizer (m_InfoV2.CreationVolume);
		m_pVelocityRandomizer = Create_Randomizer (m_InfoV2.VelRandom);

		//
		//	Convert the colors, opacities, and sizes
		//		
		Free_Props ();
		m_ColorKeyframes.Start = RGBA_TO_VECTOR3 (m_Info.StartColor);
		m_ColorKeyframes.Rand = Vector3 (0, 0, 0);
		m_ColorKeyframes.NumKeyFrames = 1;
		m_ColorKeyframes.KeyTimes = new float(m_Info.FadeTime);
		m_ColorKeyframes.Values = new Vector3(RGBA_TO_VECTOR3 (m_Info.EndColor));

		m_OpacityKeyframes.Start = ((float)(m_Info.StartColor.A)) / 255;
		m_OpacityKeyframes.Rand = 0;
		m_OpacityKeyframes.NumKeyFrames = 1;
		m_OpacityKeyframes.KeyTimes = new float(m_Info.FadeTime);
		m_OpacityKeyframes.Values = new float(((float)(m_Info.EndColor.A)) / 255);

		m_SizeKeyframes.Start = m_Info.StartSize;
		m_SizeKeyframes.Rand = 0;
		m_SizeKeyframes.NumKeyFrames = 0;
	}

	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Read_Header
//
WW3DErrorType
ParticleEmitterDefClass::Read_Header (ChunkLoadClass &chunk_load)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_LOAD_FAILED;

	// Is this the header chunk?
	if (chunk_load.Open_Chunk () &&
	    (chunk_load.Cur_Chunk_ID () == W3D_CHUNK_EMITTER_HEADER)) {

		W3dEmitterHeaderStruct header = { 0 };
		if (chunk_load.Read (&header, sizeof (header)) == sizeof (header)) {

			// Copy the name from the header structure
			m_pName = ::_strdup (header.Name);
			m_Version = header.Version;

			// Success!
			ret_val = WW3D_ERROR_OK;
		}

		// Close the chunk, so the next read will be successful.
		chunk_load.Close_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Read_User_Data
//
WW3DErrorType
ParticleEmitterDefClass::Read_User_Data (ChunkLoadClass &chunk_load)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_LOAD_FAILED;

	// Is this the user chunk?
	if (chunk_load.Open_Chunk () &&
	    (chunk_load.Cur_Chunk_ID () == W3D_CHUNK_EMITTER_USER_DATA)) {

		W3dEmitterUserInfoStruct user_info = { 0 };
		if (chunk_load.Read (&user_info, sizeof (user_info)) == sizeof (user_info)) {

			// Assume success from here on out
			ret_val = WW3D_ERROR_OK;

			// Record the user information into our member data
			m_iUserType = user_info.Type;

			// Should we read the user string from the file?
			if (user_info.SizeofStringParam > 0) {
				m_pUserString = (char *)::malloc (sizeof (char) * (user_info.SizeofStringParam+1));
				m_pUserString[0] = 0;

				// Attempt to read the user-string from the chunk
				if (chunk_load.Read (m_pUserString, user_info.SizeofStringParam) != user_info.SizeofStringParam) {
					ret_val = WW3D_ERROR_LOAD_FAILED;
				}
			}
		}

		// Close the chunk, so the next read will be successful.
		chunk_load.Close_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Read_Info
//
WW3DErrorType
ParticleEmitterDefClass::Read_Info (ChunkLoadClass &chunk_load)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_LOAD_FAILED;

	// Is this the user chunk?
	if (chunk_load.Open_Chunk () &&
	    (chunk_load.Cur_Chunk_ID () == W3D_CHUNK_EMITTER_INFO)) {

		// Read the chunk straight into our member structure
		::memset (&m_Info, 0, sizeof (m_Info));
		if (chunk_load.Read (&m_Info, sizeof (m_Info)) == sizeof (m_Info)) {
				
			// Success!
			ret_val = WW3D_ERROR_OK;
		}

		// Close the chunk, so the next read will be successful.
		chunk_load.Close_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Create_Randomizer
//
Vector3Randomizer *
ParticleEmitterDefClass::Create_Randomizer (W3dVolumeRandomizerStruct &info)
{
	Vector3Randomizer *randomizer = NULL;
	switch (info.ClassID)
	{
		case Vector3Randomizer::CLASSID_SOLIDBOX:
			randomizer = new Vector3SolidBoxRandomizer (Vector3 (info.Value1, info.Value2, info.Value3));
			break;

		case Vector3Randomizer::CLASSID_SOLIDSPHERE:
			randomizer = new Vector3SolidSphereRandomizer (info.Value1);
			break;

		case Vector3Randomizer::CLASSID_HOLLOWSPHERE:
			randomizer = new Vector3HollowSphereRandomizer (info.Value1);
			break;

		case Vector3Randomizer::CLASSID_SOLIDCYLINDER:
			randomizer = new Vector3SolidCylinderRandomizer (info.Value1, info.Value2);
			break;		
	}

	return randomizer;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Initialize_Randomizer_Struct
//
void
ParticleEmitterDefClass::Initialize_Randomizer_Struct
(
	const Vector3Randomizer &		randomizer,
	W3dVolumeRandomizerStruct &	info
)
{
	info.ClassID = randomizer.Class_ID ();
	switch (randomizer.Class_ID ())
	{
		case Vector3Randomizer::CLASSID_SOLIDBOX:
		{
			Vector3 extents = ((Vector3SolidBoxRandomizer &)randomizer).Get_Extents ();
			info.Value1 = extents.X;
			info.Value2 = extents.Y;
			info.Value3 = extents.Z;
		}
		break;

		case Vector3Randomizer::CLASSID_SOLIDSPHERE:
			info.Value1 = ((Vector3SolidSphereRandomizer &)randomizer).Get_Radius ();
			break;

		case Vector3Randomizer::CLASSID_HOLLOWSPHERE:
			info.Value1 = ((Vector3HollowSphereRandomizer &)randomizer).Get_Radius ();
			break;

		case Vector3Randomizer::CLASSID_SOLIDCYLINDER:
			info.Value1 = ((Vector3SolidCylinderRandomizer &)randomizer).Get_Height ();
			info.Value2 = ((Vector3SolidCylinderRandomizer &)randomizer).Get_Radius ();			
			break;		
	}

	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Read_InfoV2
//
WW3DErrorType
ParticleEmitterDefClass::Read_InfoV2 (ChunkLoadClass &chunk_load)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_LOAD_FAILED;

	// Is this the user chunk?
	if (chunk_load.Open_Chunk () &&
	    (chunk_load.Cur_Chunk_ID () == W3D_CHUNK_EMITTER_INFOV2)) {

		// Read the chunk straight into our member structure
		::memset (&m_InfoV2, 0, sizeof (m_InfoV2));
		if (chunk_load.Read (&m_InfoV2, sizeof (m_InfoV2)) == sizeof (m_InfoV2)) {

			//
			//	Recreate the randomizers
			//
			SAFE_DELETE (m_pCreationVolume);
			SAFE_DELETE (m_pVelocityRandomizer);
			m_pCreationVolume = Create_Randomizer (m_InfoV2.CreationVolume);
			m_pVelocityRandomizer = Create_Randomizer (m_InfoV2.VelRandom);			
				
			// Success!
			ret_val = WW3D_ERROR_OK;
		}

		// Close the chunk, so the next read will be successful.
		chunk_load.Close_Chunk ();
	}

	// Return the WW3DErrorClass::ErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Read_Props
//
WW3DErrorType
ParticleEmitterDefClass::Read_Props (ChunkLoadClass &chunk_load)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_LOAD_FAILED;
	Free_Props ();

	// Is this the user chunk?
	if (chunk_load.Open_Chunk () &&
	    (chunk_load.Cur_Chunk_ID () == W3D_CHUNK_EMITTER_PROPS)) {

		W3dEmitterPropertyStruct info = { 0 };
		if (chunk_load.Read (&info, sizeof (info)) == sizeof (info)) {

			unsigned int index=0;
			
			//ParticlePropertyStruct<Vector3>
			m_ColorKeyframes.NumKeyFrames		= info.ColorKeyframes - 1;
			m_OpacityKeyframes.NumKeyFrames	= info.OpacityKeyframes - 1;
			m_SizeKeyframes.NumKeyFrames		= info.SizeKeyframes - 1;
			m_ColorKeyframes.Rand	= RGBA_TO_VECTOR3 (info.ColorRandom);
			m_OpacityKeyframes.Rand	= info.OpacityRandom;
			m_SizeKeyframes.Rand		= info.SizeRandom;

			//
			//	Allocate the array of color keyframes
			//
			if (m_ColorKeyframes.NumKeyFrames > 0) {
				m_ColorKeyframes.KeyTimes = new float[m_ColorKeyframes.NumKeyFrames];
				m_ColorKeyframes.Values = new Vector3[m_ColorKeyframes.NumKeyFrames];
			}

			//
			//	Allocate the array of opacity keyframes
			//
			if (m_OpacityKeyframes.NumKeyFrames > 0) {
				m_OpacityKeyframes.KeyTimes = new float[m_OpacityKeyframes.NumKeyFrames];
				m_OpacityKeyframes.Values = new float[m_OpacityKeyframes.NumKeyFrames];
			}

			//
			//	Allocate the array of size keyframes
			//
			if (m_SizeKeyframes.NumKeyFrames > 0) {
				m_SizeKeyframes.KeyTimes = new float[m_SizeKeyframes.NumKeyFrames];
				m_SizeKeyframes.Values = new float[m_SizeKeyframes.NumKeyFrames];
			}
			
			//
			//	Read the color keyframes from the chunk
			//
			Read_Color_Keyframe (chunk_load, NULL, &m_ColorKeyframes.Start);
			for (index = 0; index < m_ColorKeyframes.NumKeyFrames; index ++) {
				Read_Color_Keyframe (chunk_load,
											&m_ColorKeyframes.KeyTimes[index],
											&m_ColorKeyframes.Values[index]);
			}

			//
			//	If the last keyframe is 'black' and we are using a color randomizer,
			// then make sure the last color is less then 0 so any randomized color
			// will end up as black
			//
			int last_keyframe = (m_ColorKeyframes.NumKeyFrames - 1);
			if (	last_keyframe > 0 &&
					m_ColorKeyframes.Values[last_keyframe].X == 0 &&
					m_ColorKeyframes.Values[last_keyframe].Y == 0 &&
					m_ColorKeyframes.Values[last_keyframe].Z == 0 &&
					(m_ColorKeyframes.Rand.X > 0 || m_ColorKeyframes.Rand.Y > 0 || m_ColorKeyframes.Rand.Z > 0))
			{
				m_ColorKeyframes.Values[last_keyframe].X = -m_ColorKeyframes.Rand.X;
				m_ColorKeyframes.Values[last_keyframe].Y = -m_ColorKeyframes.Rand.Y;
				m_ColorKeyframes.Values[last_keyframe].Z = -m_ColorKeyframes.Rand.Z;
			}

			//
			//	Read the opacity keyframes from the chunk
			//
			Read_Opacity_Keyframe (chunk_load, NULL, &m_OpacityKeyframes.Start);
			for (index = 0; index < m_OpacityKeyframes.NumKeyFrames; index ++) {
				Read_Opacity_Keyframe (chunk_load,
												&m_OpacityKeyframes.KeyTimes[index],
												&m_OpacityKeyframes.Values[index]);
			}

			//
			//	Read the size keyframes from the chunk
			//
			Read_Size_Keyframe (chunk_load, NULL, &m_SizeKeyframes.Start);
			for (index = 0; index < m_SizeKeyframes.NumKeyFrames; index ++) {
				Read_Size_Keyframe (chunk_load,
											&m_SizeKeyframes.KeyTimes[index],
											&m_SizeKeyframes.Values[index]);
			}
				
			// Success!
			ret_val = WW3D_ERROR_OK;
		}

		// Close the chunk, so the next read will be successful.
		chunk_load.Close_Chunk ();
	}

	// Return the WW3DErrorClass::ErrorType return code
	return ret_val;
}


//////////////////////////////////////////////////////////////////////////////////
//
//	Read_Color_Keyframe
//
bool
ParticleEmitterDefClass::Read_Color_Keyframe
(
	ChunkLoadClass &	chunk_load,
	float *				key_time,
	Vector3 *			value
)
{
	bool retval = false;

	//
	//	Read the color key frame from the chunk
	//
	W3dEmitterColorKeyframeStruct key_frame = { 0 };
	if (chunk_load.Read (&key_frame, sizeof (key_frame)) == sizeof (key_frame)) {
		
		// Pass the key time to the caller
		if (key_time != NULL) {
			(*key_time) = key_frame.Time;
		}

		// Pass the oclor back to the caller
		if (value != NULL) {
			(*value) = RGBA_TO_VECTOR3 (key_frame.Color);
		}

		// Success!
		retval = true;
	}

	return retval;
}


//////////////////////////////////////////////////////////////////////////////////
//
//	Read_Opacity_Keyframe
//
bool
ParticleEmitterDefClass::Read_Opacity_Keyframe
(
	ChunkLoadClass &	chunk_load,
	float *				key_time,
	float *				value
)
{
	bool retval = false;

	//
	//	Read the key frame from the chunk
	//
	W3dEmitterOpacityKeyframeStruct key_frame = { 0 };
	if (chunk_load.Read (&key_frame, sizeof (key_frame)) == sizeof (key_frame)) {
		
		// Pass the key time to the caller
		if (key_time != NULL) {
			(*key_time) = key_frame.Time;
		}

		// Pass the value back to the caller
		if (value != NULL) {
			(*value) = key_frame.Opacity;
		}

		// Success!
		retval = true;
	}

	return retval;
}


//////////////////////////////////////////////////////////////////////////////////
//
//	Read_Size_Keyframe
//
bool
ParticleEmitterDefClass::Read_Size_Keyframe
(
	ChunkLoadClass &	chunk_load,
	float *				key_time,
	float *				value
)
{
	bool retval = false;

	//
	//	Read the key frame from the chunk
	//
	W3dEmitterSizeKeyframeStruct key_frame = { 0 };
	if (chunk_load.Read (&key_frame, sizeof (key_frame)) == sizeof (key_frame)) {
		
		// Pass the key time to the caller
		if (key_time != NULL) {
			(*key_time) = key_frame.Time;
		}

		// Pass the value back to the caller
		if (value != NULL) {
			(*value) = key_frame.Size;
		}

		// Success!
		retval = true;
	}

	return retval;
}


//////////////////////////////////////////////////////////////////////////////////
//
//	Read_Line_Properties
//
WW3DErrorType
ParticleEmitterDefClass::Read_Line_Properties(ChunkLoadClass & chunk_load)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_LOAD_FAILED;

	// Is this the user chunk?
	if (chunk_load.Cur_Chunk_ID () == W3D_CHUNK_EMITTER_INFO) {

		// Read the chunk straight into our member structure
		if (chunk_load.Read (&m_LineProperties, sizeof (m_LineProperties)) == sizeof (m_LineProperties)) {
				
			// Success!
			ret_val = WW3D_ERROR_OK;
		}
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


//////////////////////////////////////////////////////////////////////////////////
//
//	Read_Rotation_Keyframes
//
WW3DErrorType 
ParticleEmitterDefClass::Read_Rotation_Keyframes (ChunkLoadClass &chunk_load)
{
	// Assume success
	WW3DErrorType ret_val = WW3D_ERROR_OK;

	// Read the header
	W3dEmitterRotationHeaderStruct header;
	if (chunk_load.Read(&header,sizeof(header)) != sizeof(header)) {
		ret_val = WW3D_ERROR_LOAD_FAILED;
	}
	m_RotationKeyframes.NumKeyFrames		= header.KeyframeCount;
	m_RotationKeyframes.Rand				= header.Random;
	m_InitialOrientationRandom				= header.OrientationRandom;

	// Read in the first key
	W3dEmitterRotationKeyframeStruct key;
	if (chunk_load.Read(&key,sizeof(key)) == sizeof(key)) {
		m_RotationKeyframes.Start = key.Rotation;
	}
	
	// Allocate the rotation keys
	if (m_RotationKeyframes.NumKeyFrames > 0) {
		m_RotationKeyframes.KeyTimes = new float[m_RotationKeyframes.NumKeyFrames];
		m_RotationKeyframes.Values = new float[m_RotationKeyframes.NumKeyFrames];
	}

	// Read in the keys
	for (unsigned int i=0; (i<header.KeyframeCount) && (ret_val == WW3D_ERROR_OK); i++) {
		W3dEmitterRotationKeyframeStruct key;
		if (chunk_load.Read(&key,sizeof(key)) == sizeof(key)) {
			m_RotationKeyframes.KeyTimes[i] = key.Time;
			m_RotationKeyframes.Values[i] = key.Rotation;
		} else {
			m_RotationKeyframes.KeyTimes[i] = 0.0f;
			m_RotationKeyframes.Values[i] = 0.0f;
			ret_val = WW3D_ERROR_LOAD_FAILED;
		}
	}
	return ret_val;
}


//////////////////////////////////////////////////////////////////////////////////
//
//	Read_Frame_Keyframes
//
WW3DErrorType 
ParticleEmitterDefClass::Read_Frame_Keyframes (ChunkLoadClass &chunk_load)
{
	// Assume success
	WW3DErrorType ret_val = WW3D_ERROR_OK;

	// Read the header
	W3dEmitterFrameHeaderStruct header;
	if (chunk_load.Read(&header,sizeof(header)) != sizeof(header)) {
		ret_val = WW3D_ERROR_LOAD_FAILED;
	}

	// Read in the first key
	W3dEmitterFrameKeyframeStruct key;
	if (chunk_load.Read(&key,sizeof(key)) == sizeof(key)) {
		m_FrameKeyframes.Start = key.Frame;
	}
	
	// Allocate the keys
	m_FrameKeyframes.NumKeyFrames		= header.KeyframeCount;
	m_FrameKeyframes.Rand				= header.Random;

	if (m_FrameKeyframes.NumKeyFrames > 0) {
		m_FrameKeyframes.KeyTimes = new float[m_FrameKeyframes.NumKeyFrames];
		m_FrameKeyframes.Values = new float[m_FrameKeyframes.NumKeyFrames];
	}

	// Read in the keys
	for (unsigned int i=0; (i<header.KeyframeCount) && (ret_val == WW3D_ERROR_OK); i++) {
		W3dEmitterFrameKeyframeStruct key;
		if (chunk_load.Read(&key,sizeof(key)) != sizeof(key)) {
			ret_val = WW3D_ERROR_LOAD_FAILED;
		}
		m_FrameKeyframes.KeyTimes[i] = key.Time;
		m_FrameKeyframes.Values[i] = key.Frame;
	}
	return ret_val;
}

//////////////////////////////////////////////////////////////////////////////////
//
//	Read_Blur_Time_Keyframes
//
WW3DErrorType
ParticleEmitterDefClass::Read_Blur_Time_Keyframes (ChunkLoadClass &chunk_load)
{
	// Assume success
	WW3DErrorType ret_val = WW3D_ERROR_OK;

	// Read the header
	W3dEmitterBlurTimeHeaderStruct header;
	if (chunk_load.Read(&header,sizeof(header)) != sizeof(header)) {
		ret_val = WW3D_ERROR_LOAD_FAILED;
	}

	// Read in the first key
	W3dEmitterBlurTimeKeyframeStruct key;
	if (chunk_load.Read(&key,sizeof(key)) == sizeof(key)) {
		m_BlurTimeKeyframes.Start = key.BlurTime;
	}
	
	// Allocate the keys
	m_BlurTimeKeyframes.NumKeyFrames		= header.KeyframeCount;
	m_BlurTimeKeyframes.Rand					= header.Random;

	if (m_BlurTimeKeyframes.NumKeyFrames > 0) {
		m_BlurTimeKeyframes.KeyTimes = new float[m_BlurTimeKeyframes.NumKeyFrames];
		m_BlurTimeKeyframes.Values = new float[m_BlurTimeKeyframes.NumKeyFrames];
	}

	// Read in the keys
	for (unsigned int i=0; (i<header.KeyframeCount) && (ret_val == WW3D_ERROR_OK); i++) {
		W3dEmitterBlurTimeKeyframeStruct key;
		if (chunk_load.Read(&key,sizeof(key)) != sizeof(key)) {
			ret_val = WW3D_ERROR_LOAD_FAILED;
		}
		m_BlurTimeKeyframes.KeyTimes[i] = key.Time;
		m_BlurTimeKeyframes.Values[i] = key.BlurTime;
	}
	return ret_val;
}

//////////////////////////////////////////////////////////////////////////////////
//
//	Save
//
WW3DErrorType
ParticleEmitterDefClass::Save_W3D (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	// Begin a chunk that identifies an emitter
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER) == TRUE) {
		
		// Attempt to save the different sections of the emitter definition
		if ((Save_Header (chunk_save) == WW3D_ERROR_OK) &&
			 (Save_User_Data (chunk_save) == WW3D_ERROR_OK) &&
			 (Save_Info (chunk_save) == WW3D_ERROR_OK) &&
			 (Save_InfoV2 (chunk_save) == WW3D_ERROR_OK) &&
			 (Save_Props (chunk_save) == WW3D_ERROR_OK) &&
			 (Save_Rotation_Keyframes (chunk_save) == WW3D_ERROR_OK) &&
			 (Save_Frame_Keyframes (chunk_save) == WW3D_ERROR_OK) &&
			 (Save_Blur_Time_Keyframes (chunk_save) == WW3D_ERROR_OK)
			)
		{
			// Success!
			ret_val = WW3D_ERROR_OK;
		}

		// Close the emitter chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Save_Header
//
WW3DErrorType
ParticleEmitterDefClass::Save_Header (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	// Begin a chunk that identifies the emitter
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER_HEADER) == TRUE) {
		
		// Fill the header structure
		W3dEmitterHeaderStruct header = { 0 };
		header.Version = W3D_CURRENT_EMITTER_VERSION;
		::lstrcpyn (header.Name, m_pName, sizeof (header.Name));
		header.Name[sizeof (header.Name) - 1] = 0;

		// Write the header out to the chunk
		if (chunk_save.Write (&header, sizeof (header)) == sizeof (header))
		{
			// Success!
			ret_val = WW3D_ERROR_OK;			
		}

		// End the header chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Save_User_Data
//
WW3DErrorType
ParticleEmitterDefClass::Save_User_Data (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	// Begin a chunk that contains user information
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER_USER_DATA) == TRUE) {
		
		DWORD string_len = m_pUserString ? (::lstrlen (m_pUserString) + 1) : 0;

		// Fill the header structure
		W3dEmitterUserInfoStruct user_info = { 0 };
		user_info.Type = m_iUserType;
		user_info.SizeofStringParam = string_len;

		// Write the user information structure out to the chunk
		if (chunk_save.Write (&user_info, sizeof (user_info)) == sizeof (user_info))
		{
			// Assume success
			ret_val = WW3D_ERROR_OK;

			// Do we need to write the user string to the file?
			if (m_pUserString != NULL) {
				
				// Now write the user string param to the file
				if (chunk_save.Write (m_pUserString, string_len) != string_len) {
					
					// Something went wrong
					ret_val = WW3D_ERROR_SAVE_FAILED;
				}
			}
		}

		// End the user information chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Save_Info
//
WW3DErrorType
ParticleEmitterDefClass::Save_Info (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	// Begin a chunk that identifies the generic emitter settings
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER_INFO) == TRUE) {
		
		// Write the settings structure out to the chunk
		if (chunk_save.Write (&m_Info, sizeof (m_Info)) == sizeof (m_Info))
		{
			// Success!
			ret_val = WW3D_ERROR_OK;
		}

		// End the settings chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Save_InfoV2
//
WW3DErrorType
ParticleEmitterDefClass::Save_InfoV2 (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	// Begin a chunk that identifies the generic emitter settings
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER_INFOV2) == TRUE) {
		
		// Write the settings structure out to the chunk
		if (chunk_save.Write (&m_InfoV2, sizeof (m_InfoV2)) == sizeof (m_InfoV2))
		{
			// Success!
			ret_val = WW3D_ERROR_OK;
		}

		// End the settings chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Save_Props
//
WW3DErrorType
ParticleEmitterDefClass::Save_Props (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	// Begin a chunk that identifies the generic emitter settings
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER_PROPS) == TRUE) {
		
		//
		//	Fill in the property struct
		//
		W3dEmitterPropertyStruct info = { 0 };
		info.ColorKeyframes		= m_ColorKeyframes.NumKeyFrames + 1;
		info.OpacityKeyframes	= m_OpacityKeyframes.NumKeyFrames + 1;
		info.SizeKeyframes		= m_SizeKeyframes.NumKeyFrames + 1;
		info.OpacityRandom		= m_OpacityKeyframes.Rand;
		info.SizeRandom			= m_SizeKeyframes.Rand;
		VECTOR3_TO_RGBA (m_ColorKeyframes.Rand, info.ColorRandom);		

		//
		// Write the property structure out to the chunk
		//
		if (chunk_save.Write (&info, sizeof (info)) == sizeof (info)) {

			//
			//	Save the keyframes
			//
			if ((Save_Color_Keyframes (chunk_save) == WW3D_ERROR_OK) &&
				 (Save_Opacity_Keyframes (chunk_save) == WW3D_ERROR_OK) &&
				 (Save_Size_Keyframes (chunk_save) == WW3D_ERROR_OK)) {

				// Success!
				ret_val = WW3D_ERROR_OK;			
			}
		}

		// End the settings chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Save_Color_Keyframes
//
WW3DErrorType
ParticleEmitterDefClass::Save_Color_Keyframes (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	W3dEmitterColorKeyframeStruct info = { 0 };
	info.Time = 0;
	VECTOR3_TO_RGBA (m_ColorKeyframes.Start, info.Color);

	//
	// Write the starting color keyframe to the chunk
	//
	if (chunk_save.Write (&info, sizeof (info)) == sizeof (info)) {
		
		//
		// Write each of the remaining color keyframes to the chunk
		//
		int count = m_ColorKeyframes.NumKeyFrames;
		bool success = true;
		for (int index = 0; (index < count) && success; index ++) {			
			info.Time = m_ColorKeyframes.KeyTimes[index];
			VECTOR3_TO_RGBA (m_ColorKeyframes.Values[index], info.Color);
			success = (chunk_save.Write (&info, sizeof (info)) == sizeof (info));
		}

		ret_val = success ? WW3D_ERROR_OK : WW3D_ERROR_SAVE_FAILED;
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Save_Opacity_Keyframes
//
WW3DErrorType
ParticleEmitterDefClass::Save_Opacity_Keyframes (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	W3dEmitterOpacityKeyframeStruct info = { 0 };
	info.Time = 0;
	info.Opacity = m_OpacityKeyframes.Start;

	//
	// Write the starting keyframe to the chunk
	//
	if (chunk_save.Write (&info, sizeof (info)) == sizeof (info)) {
		
		//
		// Write each of the remaining keyframes to the chunk
		//
		int count = m_OpacityKeyframes.NumKeyFrames;
		bool success = true;
		for (int index = 0; (index < count) && success; index ++) {			
			info.Time = m_OpacityKeyframes.KeyTimes[index];
			info.Opacity = m_OpacityKeyframes.Values[index];
			success = (chunk_save.Write (&info, sizeof (info)) == sizeof (info));
		}

		ret_val = success ? WW3D_ERROR_OK : WW3D_ERROR_SAVE_FAILED;
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Save_Size_Keyframes
//
WW3DErrorType
ParticleEmitterDefClass::Save_Size_Keyframes (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	W3dEmitterSizeKeyframeStruct info = { 0 };
	info.Time = 0;
	info.Size = m_SizeKeyframes.Start;

	//
	// Write the starting keyframe to the chunk
	//
	if (chunk_save.Write (&info, sizeof (info)) == sizeof (info)) {
		
		//
		// Write each of the remaining keyframes to the chunk
		//
		int count = m_SizeKeyframes.NumKeyFrames;
		bool success = true;
		for (int index = 0; (index < count) && success; index ++) {			
			info.Time = m_SizeKeyframes.KeyTimes[index];
			info.Size = m_SizeKeyframes.Values[index];
			success = (chunk_save.Write (&info, sizeof (info)) == sizeof (info));
		}

		ret_val = success ? WW3D_ERROR_OK : WW3D_ERROR_SAVE_FAILED;
	}

	// Return the WW3DErrorType return code
	return ret_val;
}

WW3DErrorType
ParticleEmitterDefClass::Save_Line_Properties (ChunkSaveClass &chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	// Begin a chunk that identifies the line properties
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER_LINE_PROPERTIES) == TRUE) {
		
		// Write the line properties structure out to the chunk
		if (chunk_save.Write (&m_LineProperties, sizeof (m_LineProperties)) == sizeof (m_LineProperties))
		{
			// Success!
			ret_val = WW3D_ERROR_OK;
		}

		// End the chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}

///////////////////////////////////////////////////////////////////////////////////
//
//	Save_Rotation_Keyframes
// NOTE: Rotation keyframes are saved in a separate chunk unlike color,size,and
// opacity which are embedded inside the PROPS chunk. 
//
WW3DErrorType
ParticleEmitterDefClass::Save_Rotation_Keyframes (ChunkSaveClass & chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;

	// Begin a chunk that identifies the rotation keyframes
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER_ROTATION_KEYFRAMES) == TRUE) {

		// Write the header
		W3dEmitterRotationHeaderStruct header;
		header.KeyframeCount = m_RotationKeyframes.NumKeyFrames;
		header.Random = m_RotationKeyframes.Rand;
		header.OrientationRandom = m_InitialOrientationRandom;
		chunk_save.Write (&header, sizeof (W3dEmitterRotationHeaderStruct));
		
		// Write the keyframes
		bool success = true;
		W3dEmitterRotationKeyframeStruct key;

		// Write the start keyframe
		key.Time = 0;
		key.Rotation = m_RotationKeyframes.Start;
		chunk_save.Write (&key, sizeof (key));

		// Write the remaining keyframes
		for (unsigned int index = 0; (index < header.KeyframeCount) && success; index ++) {			
			key.Time = m_RotationKeyframes.KeyTimes[index];
			key.Rotation = m_RotationKeyframes.Values[index];
			success = (chunk_save.Write (&key, sizeof (key)) == sizeof (key));
		}

		ret_val = success ? WW3D_ERROR_OK : WW3D_ERROR_SAVE_FAILED;

		// End the chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Save_Frame_Keyframes
// NOTE: Frame keyframes are saved in a separate chunk unlike color,size,and
// opacity which are embedded inside the PROPS chunk. 
//
WW3DErrorType
ParticleEmitterDefClass::Save_Frame_Keyframes (ChunkSaveClass & chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;
	
	// Begin a chunk that identifies the rotation keyframes
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER_FRAME_KEYFRAMES) == TRUE) {

		// Write the header
		W3dEmitterFrameHeaderStruct header;
		header.KeyframeCount = m_FrameKeyframes.NumKeyFrames;
		header.Random = m_FrameKeyframes.Rand;
		chunk_save.Write (&header, sizeof (W3dEmitterFrameHeaderStruct));
		
		// Write the keyframes
		bool success = true;
		W3dEmitterFrameKeyframeStruct key;

		// Write the start keyframe
		key.Time = 0;
		key.Frame = m_FrameKeyframes.Start;
		chunk_save.Write (&key, sizeof (key));

		// Write the remaining keyframes
		for (unsigned int index = 0; (index < header.KeyframeCount) && success; index ++) {			
			key.Time = m_FrameKeyframes.KeyTimes[index];
			key.Frame = m_FrameKeyframes.Values[index];
			success = (chunk_save.Write (&key, sizeof (key)) == sizeof (key));
		}

		ret_val = success ? WW3D_ERROR_OK : WW3D_ERROR_SAVE_FAILED;

		// End the chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}

///////////////////////////////////////////////////////////////////////////////////
//
//	Save_Blur_Time_Keyframes
// NOTE: Blur Time keyframes are saved in a separate chunk unlike color,size,and
// opacity which are embedded inside the PROPS chunk. 
//
WW3DErrorType
ParticleEmitterDefClass::Save_Blur_Time_Keyframes (ChunkSaveClass & chunk_save)
{
	// Assume error
	WW3DErrorType ret_val = WW3D_ERROR_SAVE_FAILED;
	
	// Begin a chunk that identifies the rotation keyframes
	if (chunk_save.Begin_Chunk (W3D_CHUNK_EMITTER_BLUR_TIME_KEYFRAMES) == TRUE) {

		// Write the header
		W3dEmitterBlurTimeHeaderStruct header;
		header.KeyframeCount = m_BlurTimeKeyframes.NumKeyFrames;
		header.Random = m_BlurTimeKeyframes.Rand;
		chunk_save.Write (&header, sizeof (W3dEmitterBlurTimeHeaderStruct));
		
		// Write the keyframes
		bool success = true;
		W3dEmitterBlurTimeKeyframeStruct key;

		// Write the start keyframe
		key.Time = 0;
		key.BlurTime = m_BlurTimeKeyframes.Start;
		chunk_save.Write (&key, sizeof (key));

		// Write the remaining keyframes
		for (unsigned int index = 0; (index < header.KeyframeCount) && success; index ++) {			
			key.Time = m_BlurTimeKeyframes.KeyTimes[index];
			key.BlurTime = m_BlurTimeKeyframes.Values[index];
			success = (chunk_save.Write (&key, sizeof (key)) == sizeof (key));
		}

		ret_val = success ? WW3D_ERROR_OK : WW3D_ERROR_SAVE_FAILED;

		// End the chunk
		chunk_save.End_Chunk ();
	}

	// Return the WW3DErrorType return code
	return ret_val;
}

///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Color_Keyframes
//
void
ParticleEmitterDefClass::Set_Color_Keyframes (ParticlePropertyStruct<Vector3> &keyframes)
{
	SAFE_DELETE_ARRAY (m_ColorKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_ColorKeyframes.Values);

	::Copy_Emitter_Property_Struct (m_ColorKeyframes, keyframes);
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Opacity_Keyframes
//
void
ParticleEmitterDefClass::Set_Opacity_Keyframes (ParticlePropertyStruct<float> &keyframes)
{
	SAFE_DELETE_ARRAY (m_OpacityKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_OpacityKeyframes.Values);

	::Copy_Emitter_Property_Struct (m_OpacityKeyframes, keyframes);
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Size_Keyframes
//
void
ParticleEmitterDefClass::Set_Size_Keyframes (ParticlePropertyStruct<float> &keyframes)
{
	SAFE_DELETE_ARRAY (m_SizeKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_SizeKeyframes.Values);

	::Copy_Emitter_Property_Struct (m_SizeKeyframes, keyframes);
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Rotation_Keyframes
//
void 
ParticleEmitterDefClass::Set_Rotation_Keyframes (ParticlePropertyStruct<float> &keyframes, float orient_rnd)
{
	SAFE_DELETE_ARRAY (m_RotationKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_RotationKeyframes.Values);

	::Copy_Emitter_Property_Struct (m_RotationKeyframes, keyframes);
	m_InitialOrientationRandom = orient_rnd;
	return ;
}

///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Frame_Keyframes
//
void 
ParticleEmitterDefClass::Set_Frame_Keyframes (ParticlePropertyStruct<float> &keyframes)
{
	SAFE_DELETE_ARRAY (m_FrameKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_FrameKeyframes.Values);

	::Copy_Emitter_Property_Struct (m_FrameKeyframes, keyframes);
	return ;
}

///////////////////////////////////////////////////////////////////////////////////
//
//	Set_Blur_Time_Keyframes
//
void
ParticleEmitterDefClass::Set_Blur_Time_Keyframes (ParticlePropertyStruct<float> &keyframes)
{
	SAFE_DELETE_ARRAY (m_BlurTimeKeyframes.KeyTimes);
	SAFE_DELETE_ARRAY (m_BlurTimeKeyframes.Values);

	::Copy_Emitter_Property_Struct (m_BlurTimeKeyframes, keyframes);
	return ;
}

///////////////////////////////////////////////////////////////////////////////////
//
//	Get_Color_Keyframes
//
void
ParticleEmitterDefClass::Get_Color_Keyframes (ParticlePropertyStruct<Vector3> &keyframes) const
{
	::Copy_Emitter_Property_Struct (keyframes, m_ColorKeyframes);
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Get_Opacity_Keyframes
//
void
ParticleEmitterDefClass::Get_Opacity_Keyframes (ParticlePropertyStruct<float> &keyframes) const
{
	::Copy_Emitter_Property_Struct (keyframes, m_OpacityKeyframes);
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Get_Size_Keyframes
//
void
ParticleEmitterDefClass::Get_Size_Keyframes (ParticlePropertyStruct<float> &keyframes) const
{
	::Copy_Emitter_Property_Struct (keyframes, m_SizeKeyframes);
	return ;
}

///////////////////////////////////////////////////////////////////////////////////
//
//	Get_Rotation_Keyframes
//
void
ParticleEmitterDefClass::Get_Rotation_Keyframes (ParticlePropertyStruct<float> &keyframes) const
{
	::Copy_Emitter_Property_Struct (keyframes, m_RotationKeyframes);
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Get_Frame_Keyframes
//
void 
ParticleEmitterDefClass::Get_Frame_Keyframes (ParticlePropertyStruct<float> &keyframes) const
{
	::Copy_Emitter_Property_Struct (keyframes, m_FrameKeyframes);
	return ;
}

///////////////////////////////////////////////////////////////////////////////////
//
//	Get_Blur_Time_Keyframes
//
void
ParticleEmitterDefClass::Get_Blur_Time_Keyframes (ParticlePropertyStruct<float> &blurtimeframes) const
{
	::Copy_Emitter_Property_Struct (blurtimeframes, m_BlurTimeKeyframes);
	return ;
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Create
//
RenderObjClass *
ParticleEmitterPrototypeClass::Create (void)
{
	return ParticleEmitterClass::Create_From_Definition (*m_pDefinition);
}


///////////////////////////////////////////////////////////////////////////////////
//
//	Load
//
PrototypeClass *
ParticleEmitterLoaderClass::Load_W3D (ChunkLoadClass &chunk_load)
{
	// Assume failure
	ParticleEmitterPrototypeClass *pprototype = NULL;

	// Create a definition object
	ParticleEmitterDefClass *pdefinition = new ParticleEmitterDefClass;
	if (pdefinition != NULL) {
		
		// Ask the definition object to load the emitter data
		if (pdefinition->Load_W3D (chunk_load) != WW3D_ERROR_OK) {
			
			// Error!  Free the definition
			delete pdefinition;
			pdefinition = NULL;
		} else {

			// Success!  Create a prototype from the definition
			pprototype = new ParticleEmitterPrototypeClass (pdefinition);
		}
	}

    // Return a pointer to the prototype
	 return pprototype;
}