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Initial commit of Command & Conquer Renegade source code.
This commit is contained in:
LFeenanEA
241
Code/wwphys/physcon.cpp
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241
Code/wwphys/physcon.cpp
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/*
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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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/* $Header: /Commando/Code/wwphys/physcon.cpp 13 9/20/01 5:12p Greg_h $ */
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/***********************************************************************************************
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*** Confidential - Westwood Studios ***
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***********************************************************************************************
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* *
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* Project Name : Commando *
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* *
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* $Archive:: /Commando/Code/wwphys/physcon.cpp $*
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* *
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* Author:: Greg_h *
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* *
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* $Modtime:: 9/19/01 7:56p $*
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* *
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* $Revision:: 13 $*
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "physcon.h"
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#include "chunkio.h"
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#include "wwdebug.h"
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#include "w3d_file.h"
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/*
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** Static instance of PhysicsConstants so that the constructor gets called and all arrays are filled
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*/
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static PhysicsConstants _PhysicsConstantsObject;
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/*
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** Physics Constants - see the header file for explanation
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*/
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Vector3 PhysicsConstants::GravityAcceleration(0.0f,0.0f,-9.8f);
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float PhysicsConstants::LinearDamping = 0.01f;
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float PhysicsConstants::AngularDamping = 0.05f;
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float PhysicsConstants::RestingContactVelocity = 0.1f;
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float PhysicsConstants::MinFrictionVelocity = 0.05f;
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float PhysicsConstants::DefaultContactFriction = 0.5f;
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float PhysicsConstants::DefaultContactDrag = 0.0f;
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int PhysicsConstants::SurfaceTypeOverride = -1;
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float PhysicsConstants::OverrideDrag = 0.0f;
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float PhysicsConstants::OverrideFriction = 0.0f;
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/*
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** these are all constants computed from the above constants
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*/
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float PhysicsConstants::MinFrictionVelocity2 = (PhysicsConstants::MinFrictionVelocity * PhysicsConstants::MinFrictionVelocity);
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/*
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** These are constants which are not exposed in the header file
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** Note that SURFACE_TYPE_MAX comes from w3d_file.h
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*/
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float ContactFrictionCoefficient[PhysicsConstants::DYNAMIC_OBJ_TYPE_MAX][SURFACE_TYPE_MAX];
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float ContactDragCoefficient[PhysicsConstants::DYNAMIC_OBJ_TYPE_MAX][SURFACE_TYPE_MAX];
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float test[2][2] = { 1,2,3,4 };
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/*
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** PhysicsConstants Member functions
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*/
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void PhysicsConstants::Init(void)
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{
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for (int obj_type=0; obj_type < DYNAMIC_OBJ_TYPE_MAX; obj_type++) {
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for (int surf_type=0; surf_type < SURFACE_TYPE_MAX; surf_type++) {
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ContactFrictionCoefficient[obj_type][surf_type] = DefaultContactFriction;
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ContactDragCoefficient[obj_type][surf_type] = DefaultContactDrag;
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}
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}
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}
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void PhysicsConstants::Set_Contact_Friction_Coefficient(int obj_type,int surface_type,float friction)
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{
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if ((obj_type < 0) || (obj_type > DYNAMIC_OBJ_TYPE_MAX)) {
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WWDEBUG_SAY(("PhysicsConstants -> Out of range dynamic object type!\n"));
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return;
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}
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if ((surface_type < 0) || (surface_type > SURFACE_TYPE_MAX)) {
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WWDEBUG_SAY(("PhysicsConstants -> Out of range surface type!\n"));
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return;
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}
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ContactFrictionCoefficient[obj_type][surface_type] = friction;
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}
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float PhysicsConstants::Get_Contact_Friction_Coefficient(int obj_type,int surface_type)
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{
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if (SurfaceTypeOverride != -1) surface_type = SurfaceTypeOverride;
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if (OverrideFriction != 0.0f) return OverrideFriction;
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if ((obj_type < 0) || (obj_type > DYNAMIC_OBJ_TYPE_MAX)) {
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WWDEBUG_SAY(("PhysicsConstants -> Out of range dynamic object type!\n"));
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return ContactFrictionCoefficient[0][0];
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}
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if ((surface_type < 0) || (surface_type > SURFACE_TYPE_MAX)) {
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WWDEBUG_SAY(("PhysicsConstants -> Out of range surface type!\n"));
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return ContactFrictionCoefficient[0][0];
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}
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return ContactFrictionCoefficient[obj_type][surface_type];
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}
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void PhysicsConstants::Set_Contact_Drag_Coefficient(int obj_type,int surface_type,float drag)
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{
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if ((obj_type < 0) || (obj_type > DYNAMIC_OBJ_TYPE_MAX)) {
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WWDEBUG_SAY(("PhysicsConstants -> Out of range dynamic object type!\n"));
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return;
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}
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if ((surface_type < 0) || (surface_type > SURFACE_TYPE_MAX)) {
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WWDEBUG_SAY(("PhysicsConstants -> Out of range surface type!\n"));
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return;
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}
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ContactDragCoefficient[obj_type][surface_type] = drag;
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}
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float PhysicsConstants::Get_Contact_Drag_Coefficient(int obj_type,int surface_type)
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{
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if (SurfaceTypeOverride != -1) surface_type = SurfaceTypeOverride;
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if (OverrideDrag != 0.0f) return OverrideDrag;
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if ((obj_type < 0) || (obj_type > DYNAMIC_OBJ_TYPE_MAX)) {
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WWDEBUG_SAY(("PhysicsConstants -> Out of range dynamic object type!\n"));
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return ContactDragCoefficient[0][0];
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}
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if ((surface_type < 0) || (surface_type > SURFACE_TYPE_MAX)) {
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WWDEBUG_SAY(("PhysicsConstants -> Out of range surface type!\n"));
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return ContactDragCoefficient[0][0];
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}
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return ContactDragCoefficient[obj_type][surface_type];
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}
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void PhysicsConstants::Set_Override_Surface_Type(int type)
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{
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if ((type <0) || (type > SURFACE_TYPE_MAX)) {
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SurfaceTypeOverride = -1;
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} else {
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SurfaceTypeOverride = type;
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}
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}
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void PhysicsConstants::Set_Override_Surface_Friction(float friction)
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{
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OverrideFriction = WWMath::Clamp(friction);
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}
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void PhysicsConstants::Set_Override_Surface_Drag(float drag)
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{
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OverrideDrag = drag;
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}
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/*
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** Save-Load Support
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*/
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enum
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{
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PHYSCONSTANTS_CHUNK_VARIABLES = 0x00044005,
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PHYSCONSTANT_GRAVITYACCELERATION = 0x00,
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PHYSCONSTANT_LINEARDAMPING,
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PHYSCONSTANT_ANGULARDAMPING,
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PHYSCONSTANT_RESTINGCONTACTVELOCITY,
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PHYSCONSTANT_MINFRICTIONVELOCITY,
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PHYSCONSTANT_DEFAULTCONTACTFRICTION,
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PHYSCONSTANT_MINFRICTIONVELOCITY2
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};
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void PhysicsConstants::Save(ChunkSaveClass & csave)
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{
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csave.Begin_Chunk(PHYSCONSTANTS_CHUNK_VARIABLES);
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WRITE_MICRO_CHUNK(csave,PHYSCONSTANT_GRAVITYACCELERATION,GravityAcceleration);
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WRITE_MICRO_CHUNK(csave,PHYSCONSTANT_LINEARDAMPING,LinearDamping);
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WRITE_MICRO_CHUNK(csave,PHYSCONSTANT_ANGULARDAMPING,AngularDamping);
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WRITE_MICRO_CHUNK(csave,PHYSCONSTANT_RESTINGCONTACTVELOCITY,RestingContactVelocity);
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WRITE_MICRO_CHUNK(csave,PHYSCONSTANT_MINFRICTIONVELOCITY,MinFrictionVelocity);
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WRITE_MICRO_CHUNK(csave,PHYSCONSTANT_DEFAULTCONTACTFRICTION,DefaultContactFriction);
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WRITE_MICRO_CHUNK(csave,PHYSCONSTANT_MINFRICTIONVELOCITY2,MinFrictionVelocity2);
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csave.End_Chunk();
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}
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void PhysicsConstants::Load(ChunkLoadClass & cload)
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{
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while (cload.Open_Chunk()) {
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switch(cload.Cur_Chunk_ID())
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{
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case PHYSCONSTANTS_CHUNK_VARIABLES:
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while (cload.Open_Micro_Chunk()) {
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switch(cload.Cur_Micro_Chunk_ID()) {
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READ_MICRO_CHUNK(cload,PHYSCONSTANT_GRAVITYACCELERATION,GravityAcceleration);
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READ_MICRO_CHUNK(cload,PHYSCONSTANT_LINEARDAMPING,LinearDamping);
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READ_MICRO_CHUNK(cload,PHYSCONSTANT_ANGULARDAMPING,AngularDamping);
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READ_MICRO_CHUNK(cload,PHYSCONSTANT_RESTINGCONTACTVELOCITY,RestingContactVelocity);
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READ_MICRO_CHUNK(cload,PHYSCONSTANT_MINFRICTIONVELOCITY,MinFrictionVelocity);
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READ_MICRO_CHUNK(cload,PHYSCONSTANT_DEFAULTCONTACTFRICTION,DefaultContactFriction);
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READ_MICRO_CHUNK(cload,PHYSCONSTANT_MINFRICTIONVELOCITY2,MinFrictionVelocity2);
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}
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cload.Close_Micro_Chunk();
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}
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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",cload.Cur_Chunk_ID(),__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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}
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