pivot.cpp

Go to the documentation of this file.

/*
**  Command & Conquer Generals Zero Hour(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 <http://www.gnu.org/licenses/>.
*/
 
/* $Header: /Commando/Code/ww3d2/pivot.cpp 1     1/22/01 3:36p Greg_h $ */
/*********************************************************************************************** 
 ***                            Confidential - Westwood Studios                              *** 
 *********************************************************************************************** 
 *                                                                                             * 
 *                 Project Name : Commando / G 3D Library                                      * 
 *                                                                                             * 
 *                     $Archive:: /Commando/Code/ww3d2/pivot.cpp                              $* 
 *                                                                                             * 
 *                       Author:: Greg_h                                                       * 
 *                                                                                             * 
 *                     $Modtime:: 1/08/01 10:04a                                              $* 
 *                                                                                             * 
 *                    $Revision:: 1                                                           $* 
 *                                                                                             * 
 *---------------------------------------------------------------------------------------------* 
 * Functions:                                                                                  * 
 *   PivotClass::PivotClass -- Constructor for PivotClass                                      * 
 *   PivotClass::Compute_Transform -- Update the pivot's transformation matrix                 * 
 *   PivotClass::Compute_Transform -- Update the pivot's transformation matrix                 * 
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 
#include "pivot.h"
#include "wwmath.h"
#include <string.h>
 
 
/*********************************************************************************************** 
 * PivotClass::PivotClass -- Constructor for PivotClass                                        * 
 *                                                                                             * 
 * INPUT:                                                                                      * 
 *                                                                                             * 
 * OUTPUT:                                                                                     * 
 *                                                                                             * 
 * WARNINGS:                                                                                   * 
 *                                                                                             * 
 * HISTORY:                                                                                    * 
 *   07/24/1997 GH  : Created.                                                                 * 
 *=============================================================================================*/
PivotClass::PivotClass(void) :
    Parent(NULL),
    BaseTransform(1),
    Transform(1),
#ifdef LAZY_CAP_MTX_ALLOC
    CapTransformPtr(NULL),
    Index(0),
    IsVisible(true),
    WorldSpaceTranslation(false)
#else
    CapTransform(1),
    Index(0),
    IsVisible(true),
    WorldSpaceTranslation(false),
    IsCaptured(false),
    Unused(false)
#endif
{
    Name[0] = 0;
}
 
PivotClass::PivotClass(const PivotClass& that) :
    Parent(that.Parent),
    BaseTransform(that.BaseTransform),
    Transform(that.Transform),
#ifdef LAZY_CAP_MTX_ALLOC
    CapTransformPtr(NULL),
    Index(that.Index),
    IsVisible(that.IsVisible),
    WorldSpaceTranslation(that.WorldSpaceTranslation)
#else
    CapTransform(that.CapTransform),
    Index(that.Index),
    IsVisible(that.IsVisible),
    WorldSpaceTranslation(that.WorldSpaceTranslation),
    IsCaptured(that.IsCaptured),
    Unused(that.Unused)
#endif
{
    memcpy(Name, that.Name, sizeof(Name));
#ifdef LAZY_CAP_MTX_ALLOC
    if (that.CapTransformPtr != NULL)
    {
        CapTransformPtr = MSGW3DNEW("PivotClassCaptureBoneMtx") DynamicMatrix3D;
        CapTransformPtr->Mat = that.CapTransformPtr->Mat;
    }
#endif
}
 
PivotClass& PivotClass::operator=(const PivotClass& that)
{
    if (this != &that)
    {
        memcpy(Name, that.Name, sizeof(Name));
        Parent = that.Parent;
        BaseTransform = that.BaseTransform;
        Transform = that.Transform;
    #ifdef LAZY_CAP_MTX_ALLOC
        CapTransformPtr = NULL;
        Index = that.Index;
        IsVisible = that.IsVisible;
        WorldSpaceTranslation = that.WorldSpaceTranslation;
        if (that.CapTransformPtr != NULL)
        {
            CapTransformPtr = MSGW3DNEW("PivotClassCaptureBoneMtx") DynamicMatrix3D;
            CapTransformPtr->Mat = that.CapTransformPtr->Mat;
        }
    #else
        CapTransform = that.CapTransform;
        Index = that.Index;
        IsVisible = that.IsVisible;
        WorldSpaceTranslation = that.WorldSpaceTranslation;
        IsCaptured = that.IsCaptured;
        Unused = that.Unused;
    #endif
        }
    return *this;
}
 
void PivotClass::Capture_Update(void)
{
#ifdef LAZY_CAP_MTX_ALLOC
    if (!CapTransformPtr)
        return;
 
    const Matrix3D* ct = &CapTransformPtr->Mat;
#else
    const Matrix3D* ct = &CapTransform;
#endif
 
    if ( WorldSpaceTranslation ) 
    {
        // The Translation of CapTransform is meant to be in world space,
        // so remove before applying orientation
        Matrix3D CapOrientation = *ct;
        CapOrientation.Set_Translation( Vector3( 0,0,0 ) );
#ifdef ALLOW_TEMPORARIES
        Matrix3D::Multiply(Transform,CapOrientation,&(Transform));
#else
        Transform.postMul(CapOrientation);
#endif
        // Now apply translation in world space
        Transform.Adjust_Translation( ct->Get_Translation() );
    } 
    else 
    {
#ifdef ALLOW_TEMPORARIES
        Matrix3D::Multiply(Transform, *ct, &(Transform));
#else
        Transform.postMul(*ct);
#endif
    }
}