250 lines
7.6 KiB
C++
250 lines
7.6 KiB
C++
/*
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** Command & Conquer Renegade(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/***********************************************************************************************
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*** 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 ***
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***********************************************************************************************
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* *
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* Project Name : WWPhys *
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* *
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* $Archive:: /Commando/Code/wwmath/lookuptable.cpp $*
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* *
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* Original Author:: Greg Hjelstrom *
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* *
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* $Author:: Byon_g $*
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* *
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* $Modtime:: 7/23/01 6:18p $*
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* *
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* $Revision:: 5 $*
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "lookuptable.h"
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#include "curve.h"
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#include "wwfile.h"
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#include "ffactory.h"
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#include "chunkio.h"
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#include "persistfactory.h"
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#include "vector2.h"
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/*
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** Static members
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*/
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RefMultiListClass<LookupTableClass> LookupTableMgrClass::Tables;
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/*
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** Save-Load stuff. Lookup tables are basically saved 1D curve classes. They are turned
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** into tables at load time. For future expansion, the curve is wrapped in a chunk.
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*/
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enum
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{
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LOOKUPTABLE_CHUNK_CURVE = 03071200,
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LOOKUPTABLE_CHUNK_EXTENTS,
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};
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/***********************************************************************************************
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**
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** LookupTableClass Implementation
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**
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***********************************************************************************************/
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LookupTableClass::LookupTableClass(int sample_count) :
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MinInputValue(0.0f),
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MaxInputValue(0.0f),
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OutputSamples(sample_count)
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{
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}
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LookupTableClass::~LookupTableClass(void)
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{
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}
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void LookupTableClass::Init(const char * name,Curve1DClass * curve)
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{
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// copy the name
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Name = name;
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// Store the min and max input values for the table
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curve->Get_Key(0,NULL,&MinInputValue,NULL);
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curve->Get_Key(curve->Key_Count()-1,NULL,&MaxInputValue,NULL);
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OOMaxMinusMin = 1.0f / (MaxInputValue - MinInputValue);
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// Sample the curve and store the output values
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for (int i=0; i<OutputSamples.Length(); i++) {
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float x = MinInputValue + (MaxInputValue - MinInputValue) * (float)i / (float)(OutputSamples.Length() - 1);
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float y;
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curve->Evaluate(x,&y);
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OutputSamples[i] = y;
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}
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}
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/***********************************************************************************************
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**
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** LookupTableManager Implementation
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**
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***********************************************************************************************/
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void LookupTableMgrClass::Init(void)
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{
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// create a default table that the user can use in an emergency
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LookupTableClass * default_table = NEW_REF(LookupTableClass,(2));
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LinearCurve1DClass * default_curve = new LinearCurve1DClass;
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default_curve->Add_Key(0.5f,0.0f);
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default_curve->Add_Key(0.5f,1.0f);
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default_table->Init("DefaultTable",default_curve);
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Add_Table(default_table);
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delete default_curve;
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default_table->Release_Ref();
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}
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void LookupTableMgrClass::Shutdown(void)
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{
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Reset();
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}
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void LookupTableMgrClass::Reset(void)
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{
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while (Tables.Peek_Head() != NULL) {
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Tables.Release_Head();
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}
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}
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bool LookupTableMgrClass::Add_Table(LookupTableClass * table)
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{
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return Tables.Add(table);
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}
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bool LookupTableMgrClass::Remove_Table(LookupTableClass * table)
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{
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return Tables.Remove(table);
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}
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LookupTableClass * LookupTableMgrClass::Get_Table(const char * name,bool try_to_load)
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{
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// check if we already have this table loaded...
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RefMultiListIterator<LookupTableClass> it(&Tables);
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for (it.First(); !it.Is_Done(); it.Next()) {
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if (stricmp(it.Peek_Obj()->Get_Name(),name) == 0) {
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return it.Get_Obj(); // add a reference for the user...
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}
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}
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// otherwise we can try to load it.
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LookupTableClass * new_table = NULL;
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if (try_to_load) {
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FileClass * file = _TheFileFactory->Get_File(name);
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if (file && file->Open()) {
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ChunkLoadClass cload(file);
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Curve1DClass * curve = NULL;
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Load_Table_Desc(cload,&curve);
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if (curve != NULL) {
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new_table = NEW_REF(LookupTableClass,());
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new_table->Init(name,curve);
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Add_Table(new_table);
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delete curve;
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}
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}
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_TheFileFactory->Return_File(file);
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}
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return new_table; // constructor ref is returned to user.
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}
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void LookupTableMgrClass::Save_Table_Desc
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(
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ChunkSaveClass & csave,
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Curve1DClass * curve,
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const Vector2 & min_corner,
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const Vector2 & max_corner
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)
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{
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// save the curve
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csave.Begin_Chunk(LOOKUPTABLE_CHUNK_CURVE);
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csave.Begin_Chunk(curve->Get_Factory().Chunk_ID());
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curve->Get_Factory().Save(csave,curve);
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csave.End_Chunk();
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csave.End_Chunk();
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// save the extents
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csave.Begin_Chunk(LOOKUPTABLE_CHUNK_EXTENTS);
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csave.Write(&(min_corner.X),sizeof(float));
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csave.Write(&(min_corner.Y),sizeof(float));
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csave.Write(&(max_corner.X),sizeof(float));
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csave.Write(&(max_corner.Y),sizeof(float));
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csave.End_Chunk();
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}
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void LookupTableMgrClass::Load_Table_Desc
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(
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ChunkLoadClass & cload,
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Curve1DClass ** curve_ptr,
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Vector2 * set_min_corner,
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Vector2 * set_max_corner
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)
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{
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*curve_ptr = NULL;
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PersistFactoryClass * factory;
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float xmin,xmax;
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float ymin,ymax;
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xmin = xmax = ymin = ymax = 0.0f;
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while (cload.Open_Chunk()) {
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switch(cload.Cur_Chunk_ID()) {
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case LOOKUPTABLE_CHUNK_CURVE:
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cload.Open_Chunk();
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factory = SaveLoadSystemClass::Find_Persist_Factory(cload.Cur_Chunk_ID());
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WWASSERT(factory != NULL);
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if (factory != NULL) {
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*curve_ptr = (Curve1DClass *)factory->Load(cload);
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}
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cload.Close_Chunk();
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break;
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case LOOKUPTABLE_CHUNK_EXTENTS:
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cload.Read(&xmin,sizeof(xmin));
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cload.Read(&ymin,sizeof(ymin));
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cload.Read(&xmax,sizeof(xmax));
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cload.Read(&ymax,sizeof(ymax));
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break;
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default:
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WWDEBUG_SAY(("Unhandled Chunk: 0x%X File: %s Line: %d\r\n",__FILE__,__LINE__));
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break;
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}
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cload.Close_Chunk();
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}
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if (set_min_corner != NULL) {
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set_min_corner->Set(xmin,ymin);
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}
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if (set_max_corner != NULL) {
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set_max_corner->Set(xmax,ymax);
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}
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}
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