colboxsave.cpp

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/*
**  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/>.
*/
 
/***********************************************************************************************
 ***              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               ***
 ***********************************************************************************************
 *                                                                                             *
 *                 Project Name : Max2W3d                                                      *
 *                                                                                             *
 *                     $Archive:: /Commando/Code/Tools/max2w3d/colboxsave.cpp                 $*
 *                                                                                             *
 *                       Author:: Greg Hjelstrom                                               *
 *                                                                                             *
 *                     $Modtime:: 12/06/00 4:06p                                              $*
 *                                                                                             *
 *                    $Revision:: 7                                                           $*
 *                                                                                             *
 *---------------------------------------------------------------------------------------------*
 * Functions:                                                                                  *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 
 
#include "colboxsave.h"
#include "w3d_file.h"
#include "util.h"
#include "w3dappdata.h"
#include "errclass.h"
 
 
CollisionBoxSaveClass::CollisionBoxSaveClass
(
    char * mesh_name,
    char * container_name,
    INode * inode,
    Matrix3 & exportspace,
    TimeValue curtime,
    Progress_Meter_Class & meter
)
{
    // wrestle the mesh out of 3dsMAX
    Object *       obj = inode->EvalWorldState(curtime).obj;
    TriObject *    tri = (TriObject *)obj->ConvertToType(curtime, triObjectClassID);
    Mesh           mesh = tri->mesh;
    DWORD              wirecolor = inode->GetWireColor();
 
    if (mesh.getNumVerts() == 0) {
        throw ErrorClass("Mesh %s has no vertices!\n",mesh_name);
    }

    // Generate the AABox or OBBox data.
    memset(&BoxData,0,sizeof(BoxData));
 
    BoxData.Version = W3D_BOX_CURRENT_VERSION;
    if ((container_name != NULL) && (strlen(container_name) > 0)) {
        strcpy(BoxData.Name,container_name);
        strcat(BoxData.Name,".");
    }
    strcat(BoxData.Name,mesh_name);
 
    BoxData.Attributes = 0;
    if (Is_Collision_AABox(inode)) {
        BoxData.Attributes |= W3D_BOX_ATTRIBUTE_ALIGNED;
    } else {
        BoxData.Attributes |= W3D_BOX_ATTRIBUTE_ORIENTED;
    }
    if (Is_Physical_Collision(inode)) {
        BoxData.Attributes |= W3D_BOX_ATTRIBTUE_COLLISION_TYPE_PHYSICAL;
    }
    if (Is_Projectile_Collision(inode)) {
        BoxData.Attributes |= W3D_BOX_ATTRIBTUE_COLLISION_TYPE_PROJECTILE;
    }
    if (Is_Vis_Collision(inode)) {
        BoxData.Attributes |= W3D_BOX_ATTRIBTUE_COLLISION_TYPE_VIS;
    }
    if (Is_Camera_Collision(inode)) {
        BoxData.Attributes |= W3D_BOX_ATTRIBTUE_COLLISION_TYPE_CAMERA;
    }
    if (Is_Vehicle_Collision(inode)) {
        BoxData.Attributes |= W3D_BOX_ATTRIBTUE_COLLISION_TYPE_VEHICLE;
    }
 
    BoxData.Color.R = GetRValue(wirecolor);
    BoxData.Color.G = GetGValue(wirecolor);
    BoxData.Color.B = GetBValue(wirecolor);
 
    // if this is an axis-aligned box, then use the world coord system
    if (Is_Collision_AABox(inode)) {
        exportspace.NoRot();
    }
 
    // Transform the mesh into the desired coordinate system
    Matrix3 node_matrix = inode->GetObjectTM(curtime);
    Matrix3 offset_matrix = node_matrix * Inverse(exportspace);
    int ivert;
    
    for (ivert = 0; ivert < mesh.getNumVerts (); ++ivert) {
        mesh.verts[ivert] = mesh.verts[ivert] * offset_matrix;
    }
 
    // Find the center and extent of the box.
    Point3 min_point = mesh.verts[0];
    Point3 max_point = mesh.verts[1];
 
    for (ivert=0; ivert < mesh.getNumVerts(); ++ivert) {
        if (mesh.verts[ivert].x < min_point.x) min_point.x = mesh.verts[ivert].x;
        if (mesh.verts[ivert].y < min_point.y) min_point.y = mesh.verts[ivert].y;
        if (mesh.verts[ivert].z < min_point.z) min_point.z = mesh.verts[ivert].z;
 
        if (mesh.verts[ivert].x > max_point.x) max_point.x = mesh.verts[ivert].x;
        if (mesh.verts[ivert].y > max_point.y) max_point.y = mesh.verts[ivert].y;
        if (mesh.verts[ivert].z > max_point.z) max_point.z = mesh.verts[ivert].z;
    }
        
    Point3 center = (max_point + min_point) / 2.0f;
    Point3 extent = (max_point - min_point) / 2.0f;
 
    BoxData.Center.X = center.x;
    BoxData.Center.Y = center.y;
    BoxData.Center.Z = center.z;
 
    BoxData.Extent.X = extent.x;
    BoxData.Extent.Y = extent.y;
    BoxData.Extent.Z = extent.z;
}
 
 
 
int CollisionBoxSaveClass::Write_To_File(ChunkSaveClass & csave)
{
    csave.Begin_Chunk(W3D_CHUNK_BOX);
    csave.Write(&BoxData,sizeof(BoxData));
    csave.End_Chunk();
    return 0;
}