Initial Prey Game integration support.

2026-08-16 16:20:42 +02:00 · 2026-05-05 15:01:01 -07:00
parent a6c6f1ed26
commit 8d5f678b25
552 changed files with 265551 additions and 209 deletions
@@ -0,0 +1,130 @@
+// Copyright (C) 2004 Id Software, Inc.
+//
+
+#include "precompiled.h"
+#pragma hdrstop
+
+#include "../Game_local.h"
+
+CLASS_DECLARATION( idForce, idForce_Drag )
+END_CLASS
+
+/*
+================
+idForce_Drag::idForce_Drag
+================
+*/
+idForce_Drag::idForce_Drag( void ) {
+	damping			= 0.5f;
+	dragPosition	= vec3_zero;
+	physics			= NULL;
+	id				= 0;
+	p				= vec3_zero;
+	dragPosition	= vec3_zero;
+}
+
+/*
+================
+idForce_Drag::~idForce_Drag
+================
+*/
+idForce_Drag::~idForce_Drag( void ) {
+}
+
+/*
+================
+idForce_Drag::Init
+================
+*/
+void idForce_Drag::Init( float damping ) {
+	if ( damping >= 0.0f && damping < 1.0f ) {
+		this->damping = damping;
+	}
+}
+
+/*
+================
+idForce_Drag::SetPhysics
+================
+*/
+void idForce_Drag::SetPhysics( idPhysics *phys, int id, const idVec3 &p ) {
+	this->physics = phys;
+	this->id = id;
+	this->p = p;
+}
+
+/*
+================
+idForce_Drag::SetDragPosition
+================
+*/
+void idForce_Drag::SetDragPosition( const idVec3 &pos ) {
+	this->dragPosition = pos;
+}
+
+/*
+================
+idForce_Drag::GetDragPosition
+================
+*/
+const idVec3 &idForce_Drag::GetDragPosition( void ) const {
+	return this->dragPosition;
+}
+
+/*
+================
+idForce_Drag::GetDraggedPosition
+================
+*/
+const idVec3 idForce_Drag::GetDraggedPosition( void ) const {
+	return ( physics->GetOrigin( id ) + p * physics->GetAxis( id ) );
+}
+
+/*
+================
+idForce_Drag::Evaluate
+================
+*/
+void idForce_Drag::Evaluate( int time ) {
+	float l1, l2, mass;
+	idVec3 dragOrigin, dir1, dir2, velocity, centerOfMass;
+	idMat3 inertiaTensor;
+	idRotation rotation;
+	idClipModel *clipModel;
+
+	if ( !physics ) {
+		return;
+	}
+
+	clipModel = physics->GetClipModel( id );
+	if ( clipModel != NULL && clipModel->IsTraceModel() ) {
+		clipModel->GetMassProperties( 1.0f, mass, centerOfMass, inertiaTensor );
+	} else {
+		centerOfMass.Zero();
+	}
+
+	centerOfMass = physics->GetOrigin( id ) + centerOfMass * physics->GetAxis( id );
+	dragOrigin = physics->GetOrigin( id ) + p * physics->GetAxis( id );
+
+	dir1 = dragPosition - centerOfMass;
+	dir2 = dragOrigin - centerOfMass;
+	l1 = dir1.Normalize();
+	l2 = dir2.Normalize();
+
+	rotation.Set( centerOfMass, dir2.Cross( dir1 ), RAD2DEG( idMath::ACos( dir1 * dir2 ) ) );
+	physics->SetAngularVelocity( rotation.ToAngularVelocity() / MS2SEC( USERCMD_MSEC ), id );
+
+	velocity = physics->GetLinearVelocity( id ) * damping + dir1 * ( ( l1 - l2 ) * ( 1.0f - damping ) / MS2SEC( USERCMD_MSEC ) );
+	physics->SetLinearVelocity( velocity, id );
+}
+
+/*
+================
+idForce_Drag::RemovePhysics
+================
+*/
+void idForce_Drag::RemovePhysics( const idPhysics *phys ) {
+	if ( physics == phys ) {
+		physics = NULL;
+	}
+}