/*
** 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 .
*/
/***********************************************************************************************
*** 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 : WWPhys *
* *
* $Archive:: /Commando/Code/wwmath/lookuptable.cpp $*
* *
* Original Author:: Greg Hjelstrom *
* *
* $Author:: Byon_g $*
* *
* $Modtime:: 7/23/01 6:18p $*
* *
* $Revision:: 5 $*
* *
*---------------------------------------------------------------------------------------------*
* Functions: *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#include "lookuptable.h"
#include "curve.h"
#include "wwfile.h"
#include "ffactory.h"
#include "chunkio.h"
#include "persistfactory.h"
#include "vector2.h"
/*
** Static members
*/
RefMultiListClass LookupTableMgrClass::Tables;
/*
** Save-Load stuff. Lookup tables are basically saved 1D curve classes. They are turned
** into tables at load time. For future expansion, the curve is wrapped in a chunk.
*/
enum
{
LOOKUPTABLE_CHUNK_CURVE = 03071200,
LOOKUPTABLE_CHUNK_EXTENTS,
};
/***********************************************************************************************
**
** LookupTableClass Implementation
**
***********************************************************************************************/
LookupTableClass::LookupTableClass(int sample_count) :
MinInputValue(0.0f),
MaxInputValue(0.0f),
OutputSamples(sample_count)
{
}
LookupTableClass::~LookupTableClass(void)
{
}
void LookupTableClass::Init(const char * name,Curve1DClass * curve)
{
// copy the name
Name = name;
// Store the min and max input values for the table
curve->Get_Key(0,NULL,&MinInputValue,NULL);
curve->Get_Key(curve->Key_Count()-1,NULL,&MaxInputValue,NULL);
OOMaxMinusMin = 1.0f / (MaxInputValue - MinInputValue);
// Sample the curve and store the output values
for (int i=0; iEvaluate(x,&y);
OutputSamples[i] = y;
}
}
/***********************************************************************************************
**
** LookupTableManager Implementation
**
***********************************************************************************************/
void LookupTableMgrClass::Init(void)
{
// create a default table that the user can use in an emergency
LookupTableClass * default_table = NEW_REF(LookupTableClass,(2));
LinearCurve1DClass * default_curve = new LinearCurve1DClass;
default_curve->Add_Key(0.5f,0.0f);
default_curve->Add_Key(0.5f,1.0f);
default_table->Init("DefaultTable",default_curve);
Add_Table(default_table);
delete default_curve;
default_table->Release_Ref();
}
void LookupTableMgrClass::Shutdown(void)
{
Reset();
}
void LookupTableMgrClass::Reset(void)
{
while (Tables.Peek_Head() != NULL) {
Tables.Release_Head();
}
}
bool LookupTableMgrClass::Add_Table(LookupTableClass * table)
{
return Tables.Add(table);
}
bool LookupTableMgrClass::Remove_Table(LookupTableClass * table)
{
return Tables.Remove(table);
}
LookupTableClass * LookupTableMgrClass::Get_Table(const char * name,bool try_to_load)
{
// check if we already have this table loaded...
RefMultiListIterator it(&Tables);
for (it.First(); !it.Is_Done(); it.Next()) {
if (stricmp(it.Peek_Obj()->Get_Name(),name) == 0) {
return it.Get_Obj(); // add a reference for the user...
}
}
// otherwise we can try to load it.
LookupTableClass * new_table = NULL;
if (try_to_load) {
FileClass * file = _TheFileFactory->Get_File(name);
if (file && file->Open()) {
ChunkLoadClass cload(file);
Curve1DClass * curve = NULL;
Load_Table_Desc(cload,&curve);
if (curve != NULL) {
new_table = NEW_REF(LookupTableClass,());
new_table->Init(name,curve);
Add_Table(new_table);
delete curve;
}
}
_TheFileFactory->Return_File(file);
}
return new_table; // constructor ref is returned to user.
}
void LookupTableMgrClass::Save_Table_Desc
(
ChunkSaveClass & csave,
Curve1DClass * curve,
const Vector2 & min_corner,
const Vector2 & max_corner
)
{
// save the curve
csave.Begin_Chunk(LOOKUPTABLE_CHUNK_CURVE);
csave.Begin_Chunk(curve->Get_Factory().Chunk_ID());
curve->Get_Factory().Save(csave,curve);
csave.End_Chunk();
csave.End_Chunk();
// save the extents
csave.Begin_Chunk(LOOKUPTABLE_CHUNK_EXTENTS);
csave.Write(&(min_corner.X),sizeof(float));
csave.Write(&(min_corner.Y),sizeof(float));
csave.Write(&(max_corner.X),sizeof(float));
csave.Write(&(max_corner.Y),sizeof(float));
csave.End_Chunk();
}
void LookupTableMgrClass::Load_Table_Desc
(
ChunkLoadClass & cload,
Curve1DClass ** curve_ptr,
Vector2 * set_min_corner,
Vector2 * set_max_corner
)
{
*curve_ptr = NULL;
PersistFactoryClass * factory;
float xmin,xmax;
float ymin,ymax;
xmin = xmax = ymin = ymax = 0.0f;
while (cload.Open_Chunk()) {
switch(cload.Cur_Chunk_ID()) {
case LOOKUPTABLE_CHUNK_CURVE:
cload.Open_Chunk();
factory = SaveLoadSystemClass::Find_Persist_Factory(cload.Cur_Chunk_ID());
WWASSERT(factory != NULL);
if (factory != NULL) {
*curve_ptr = (Curve1DClass *)factory->Load(cload);
}
cload.Close_Chunk();
break;
case LOOKUPTABLE_CHUNK_EXTENTS:
cload.Read(&xmin,sizeof(xmin));
cload.Read(&ymin,sizeof(ymin));
cload.Read(&xmax,sizeof(xmax));
cload.Read(&ymax,sizeof(ymax));
break;
default:
WWDEBUG_SAY(("Unhandled Chunk: 0x%X File: %s Line: %d\r\n",__FILE__,__LINE__));
break;
}
cload.Close_Chunk();
}
if (set_min_corner != NULL) {
set_min_corner->Set(xmin,ymin);
}
if (set_max_corner != NULL) {
set_max_corner->Set(xmax,ymax);
}
}