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