mesh.cpp

Go to the documentation of this file.

/*
        Scalable Building Simulator - Mesh Object
        The Skyscraper Project - Version 2.0
        Copyright (C)2004-2024 Ryan Thoryk
        https://www.skyscrapersim.net
        https://sourceforge.net/projects/skyscraper/
        Contact - ryan@skyscrapersim.net
 
        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 2
        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, write to the Free Software
        Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
 
#include <OgreMesh.h>
#include <OgreResourceGroupManager.h>
#include <OgreMaterialManager.h>
#include <OgreBulletDynamicsRigidBody.h>
#include <OgreMath.h>
#include <OgreAxisAlignedBox.h>
#include <Shapes/OgreBulletCollisionsTrimeshShape.h>
#include <Shapes/OgreBulletCollisionsBoxShape.h>
#include "globals.h"
#include "sbs.h"
#include "camera.h"
#include "wall.h"
#include "texture.h"
#include "profiler.h"
#include "scenenode.h"
#include "dynamicmesh.h"
#include "polymesh.h"
#include "polygon.h"
#include "utility.h"
#include "mesh.h"
 
namespace SBS {
 
MeshObject::MeshObject(Object* parent, const std::string &name, DynamicMesh* wrapper, const std::string &filename, const std::string &meshname, Real max_render_distance, Real scale_multiplier, bool create_collider, bool dynamic_buffers) : Object(parent)
{
        //set up SBS object
        SetValues("Mesh", name, true);
 
        //create an instance of the geometry processor
        polymesh = new PolyMesh(this);
 
        //initialize mesh object
        enabled = true;
        mBody = 0;
        mShape = 0;
        prepared = false;
        is_physical = false;
        restitution = 0;
        friction = 0;
        mass = 0;
        this->create_collider = create_collider;
        collider_node = 0;
        Filename = filename;
        Meshname = meshname;
        remove_on_disable = true;
        wrapper_selfcreate = false;
        model_loaded = false;
        Bounds = new Ogre::AxisAlignedBox();
        collidermesh = 0;
        size = 0;
        tricollider = true;
 
        std::string Name = GetSceneNode()->GetFullName();
        this->name = Name;
 
        if (wrapper == 0)
        {
                wrapper_selfcreate = true;
                MeshWrapper = new DynamicMesh(this, GetSceneNode(), name, max_render_distance, dynamic_buffers);
        }
        else
                MeshWrapper = wrapper;
 
        //add this mesh object as a client to the dynamic mesh wrapper
        MeshWrapper->AddClient(this);
 
        if (filename != "")
        {
                //load mesh from a file if specified
                bool result = LoadFromFile(filename);
 
                if (result == false)
                        return;
        }
        else if (meshname != "")
        {
                //load mesh from a preexisting name if specified
                bool result = LoadFromMesh(meshname);
 
                if (result == false)
                        return;
        }
 
        //rescale mesh
        //file-loaded meshes need to be converted to a remote scale, since they're not pre-scaled
        if (filename == "")
                GetSceneNode()->SetScale(scale_multiplier);
        else
                GetSceneNode()->SetScale(sbs->ToRemote(scale_multiplier));
 
        sbs->AddMeshHandle(this);
}
 
MeshObject::~MeshObject()
{
        //delete physics/collider components
        DeleteCollider();
 
        //delete wall objects
        DeleteWalls();
 
        if (collider_node)
                delete collider_node;
        collider_node = 0;
 
        MeshWrapper->DetachClient(this);
 
        if (sbs->FastDelete == false)
        {
                MeshWrapper->RemoveClient(this);
                sbs->DeleteMeshHandle(this);
        }
 
        //delete dynamic mesh wrapper if needed
        if (wrapper_selfcreate == true)
                delete MeshWrapper;
        MeshWrapper = 0;
 
        if (Bounds)
                delete Bounds;
        Bounds = 0;
 
        delete polymesh;
}
 
void MeshObject::GetBounds()
{
        *Bounds = MeshWrapper->GetBounds(this);
}
 
void MeshObject::Enabled(bool value)
{
        //enables or disables the mesh
 
        if (value == enabled)
        {
                if (remove_on_disable == false && sbs->camera->IsActive() == false && value == false)
                {
                        //if camera is detached from this engine, and mesh is disabled, detach a persistent collider
                        remove_on_disable = true;
                        EnableCollider(false);
                        remove_on_disable = false;
                }
                return;
        }
 
        SBS_PROFILE("MeshObject::Enable");
 
        MeshWrapper->Enabled(value, this);
 
        EnableCollider(value);
 
        enabled = value;
}
 
void MeshObject::EnableCollider(bool value)
{
        //enable or disable collision detection
 
        if (!mBody)
                return;
 
        SBS_PROFILE("MeshObject::EnableCollider");
 
        if (remove_on_disable == false && sbs->camera->IsActive() == true)
        {
                //if removed from world and 'remove_on_disable' is false, add to world
                if (mBody->isInWorld() == false)
                        mBody->addToWorld();
 
                //disable collisions on object only (don't remove)
                mBody->enableCollisions(value);
        }
        else
        {
                //completely remove object from dynamics world if disabled; re-add to enable
                if (value == false)
                        mBody->removeFromWorld();
                else
                        mBody->addToWorld();
        }
        sbs->camera->ResetCollisions();
}
 
Wall* MeshObject::CreateWallObject(const std::string &name)
{
        //create a new wall object in the given array
 
        Wall *wall = new Wall(this, name);
        Walls.emplace_back(wall);
        return wall;
}
 
Wall* MeshObject::GetWallByName(std::string name)
{
        //find a wall object by name
 
        SetCase(name, false);
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                if (name == SetCaseCopy(Walls[i]->GetName(), false) == true)
                        return Walls[i];
        }
        return 0;
}
 
bool MeshObject::IsEnabled()
{
        return enabled;
}
 
void MeshObject::Prepare(bool force)
{
        //prepare mesh object
 
        SBS_PROFILE("MeshObject::Prepare");
 
        if (prepared == true && force == false)
                return;
 
        //set up bounding box
        if (model_loaded == false)
        {
                Bounds->setNull();
                for (size_t i = 0; i < Walls.size(); i++)
                {
                        if (!Walls[i])
                                continue;
 
                        for (size_t j = 0; j < Walls[i]->polygons.size(); j++)
                        {
                                Polygon *poly = Walls[i]->polygons[j];
 
                                if (!poly)
                                        continue;
                                for (size_t k = 0; k < poly->geometry.size(); k++)
                                {
                                        for (size_t l = 0; l < poly->geometry[k].size(); l++)
                                                Bounds->merge(poly->geometry[k][l].vertex);
                                }
                        }
                }
        }
 
        //update dynamic mesh
        MeshWrapper->NeedsUpdate(this);
 
        prepared = true;
}
 
void MeshObject::EnableDebugView(bool value)
{
        //enable or disable debug view of mesh
        MeshWrapper->EnableDebugView(value, this);
}
 
void MeshObject::CreateColliderFromModel(int &vertex_count, Vector3* &vertices, int &index_count, unsigned long* &indices)
{
        //set up triangle collider based on loaded model geometry
 
        if (create_collider == false)
                return;
 
        //exit of collider already exists
        if (mBody)
                return;
 
        if (!GetSceneNode())
                return;
 
        try
        {
                //initialize collider shape
                OgreBulletCollisions::TriangleMeshCollisionShape* shape = new OgreBulletCollisions::TriangleMeshCollisionShape(vertex_count, index_count);
 
                //add vertices to shape
                for (int i = 0; i < index_count; i += 3)
                {
                        shape->AddTriangle(vertices[indices[i]], vertices[indices[i + 1]], vertices[indices[i + 2]]);
                }
 
                //finalize shape
                shape->Finish();
 
                //create a collider scene node
                if (!collider_node)
                        collider_node = GetSceneNode()->CreateChild(GetName() + " collider");
 
                //physics is not supported on triangle meshes; use CreateBoxCollider instead
                mBody = new OgreBulletDynamics::RigidBody(name, sbs->mWorld);
                mBody->setStaticShape(collider_node->GetRawSceneNode(), shape, 0.1f, 0.5f, false);
                mShape = shape;
        }
        catch (Ogre::Exception &e)
        {
                ReportError("Error creating model collider for '" + name + "'\n" + e.getDescription());
        }
}
 
void MeshObject::CreateBoxCollider()
{
        //set up a box collider for full extents of a mesh
 
        if (create_collider == false)
                return;
 
        //exit of collider already exists
        if (mBody)
                return;
 
        if (!GetSceneNode())
                return;
 
        try
        {
                //initialize collider shape
                Real scale = GetSceneNode()->GetScale();
 
                if (Bounds->isNull() == true)
                        return;
 
                Vector3 bounds = Bounds->getHalfSize() * scale;
                OgreBulletCollisions::BoxCollisionShape* shape = new OgreBulletCollisions::BoxCollisionShape(bounds);
 
                //create a new scene node for this collider, and center the collider accordingly
                Vector3 collider_center = sbs->ToLocal(Bounds->getCenter());
                if (!collider_node)
                        collider_node = GetSceneNode()->CreateChild(GetName() + " collider", collider_center);
 
                mBody = new OgreBulletDynamics::RigidBody(name, sbs->mWorld);
                if (IsPhysical() == false)
                        mBody->setStaticShape(collider_node->GetRawSceneNode(), shape, 0.1f, 0.5f, false);
                else
                        mBody->setShape(collider_node->GetRawSceneNode(), shape, restitution, friction, mass);
                mShape = shape;
        }
        catch (Ogre::Exception &e)
        {
                ReportError("Error creating box collider for '" + name + "'\n" + e.getDescription());
        }
}
 
void MeshObject::DeleteWalls()
{
        //delete all wall objects
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                Wall *wall = Walls[i];
                if (wall)
                {
                        wall->parent_deleting = true;
                        if (sbs->FastDelete == false)
                                wall->DeletePolygons();
                        delete wall;
                        Walls[i] = 0;
                }
        }
        Walls.clear();
}
 
void MeshObject::DeleteWalls(Object *parent)
{
        //delete walls of specified parent object
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                Wall *wall = Walls[i];
                if (wall)
                {
                        if (wall->GetParent() == parent)
                        {
                                wall->parent_deleting = true;
                                wall->DeletePolygons();
                                delete wall;
                                Walls.erase(Walls.begin() + i);
                                i--;
                        }
                }
        }
}
 
Vector3 MeshObject::GetPoint(const std::string &wallname, const Vector3 &start, const Vector3 &end)
{
        //do a line intersection with a specified wall associated with this mesh object,
        //and return the intersection point
 
        Wall *wall = GetWallByName(wallname);
 
        if (wall)
                return wall->GetPoint(start, end);
 
        return Vector3(0, 0, 0);
}
 
Vector3 MeshObject::GetWallExtents(const std::string &name, Real altitude, bool get_max)
{
        //return the X and Z extents of a standard wall (by name) at a specific altitude, by doing a double plane cut
 
        Wall *wall = GetWallByName(name);
 
        if (wall)
                return wall->GetWallExtents(altitude, get_max);
 
        return Vector3(0, 0, 0);
}
 
void MeshObject::OnMove(bool parent)
{
        if (collider_node)
                collider_node->Update();
 
        if (mBody)
                mBody->updateTransform(true, false, false);
 
        if (UsingDynamicBuffers() == true)
                MeshWrapper->UpdateVertices(this);
}
 
void MeshObject::OnRotate(bool parent)
{
        if (collider_node)
                collider_node->Update();
 
        if (mBody)
        {
                if (parent == true)
                        OnMove(parent); //update position if parent object has been rotated
 
                mBody->updateTransform(false, true, false);
        }
 
        if (UsingDynamicBuffers() == true)
                MeshWrapper->UpdateVertices(this);
}
 
bool MeshObject::IsVisible(Ogre::Camera *camera)
{
        //returns if this mesh object is visible in the provided camera's view frustum or not
 
        if (IsEnabled() == false || !camera)
                return false;
 
        //if beyond the max render distance
        if (MeshWrapper->IsVisible(this) == false)
                return false;
 
        //if (polymesh->GetSubmeshCount() == 0)
                //return false;
 
        if (Bounds->isNull() == true)
                return false;
 
        Vector3 min = Bounds->getMinimum();
        Vector3 max = Bounds->getMaximum();
        Vector3 pos = sbs->ToRemote(GetPosition());
        Ogre::AxisAlignedBox global_box (pos + min, pos + max);
 
        return camera->isVisible(global_box);
}
 
bool MeshObject::IsPhysical()
{
        return is_physical;
}
 
Vector3 MeshObject::GetOffset()
{
        //for models, return bounding box offset value, used to center the mesh
 
        Bounds->scale(GetSceneNode()->GetRawSceneNode()->getScale());
 
        if (Bounds->isNull() == true)
                return Vector3::ZERO;
 
        Vector3 vec = Bounds->getCenter();
        Vector3 min = Bounds->getMinimum();
        Vector3 offset (vec.x, -Bounds->getMinimum().y, -vec.z);
        return sbs->ToLocal(offset);
}
 
void MeshObject::Cut(Vector3 start, Vector3 end, bool cutwalls, bool cutfloors, int checkwallnumber, bool reset_check)
{
        //cut all walls in this mesh object
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                sbs->GetUtility()->Cut(Walls[i], start, end, cutwalls, cutfloors, checkwallnumber, reset_check);
        }
}
 
void MeshObject::CutOutsideBounds(Vector3 start, Vector3 end, bool cutwalls, bool cutfloors)
{
        Real limit = 1000000;
 
        Vector3 left_min (-limit, -limit, -limit);
        Vector3 left_max (start.x, limit, limit);
        Vector3 right_min (end.x, -limit, -limit);
        Vector3 right_max (limit, limit, limit);
        Vector3 front_min (-limit, -limit, -limit);
        Vector3 front_max (limit, limit, start.z);
        Vector3 back_min (-limit, -limit, end.z);
        Vector3 back_max (limit, limit, limit);
 
        Cut(left_min, left_max, cutwalls, cutfloors);
        Cut(right_min, right_max, cutwalls, cutfloors);
        Cut(front_min, front_max, cutwalls, cutfloors);
        Cut(back_min, back_max, cutwalls, cutfloors);
}
 
bool MeshObject::LoadFromFile(const std::string &filename)
{
        //load mesh object from a file
 
        std::string filename1 = "data/";
        filename1.append(filename);
        std::string filename2 = sbs->VerifyFile(filename1);
        std::string path = sbs->GetMountPath(filename2, filename2);
        std::string matname;
 
        //load material file
        try
        {
                matname = filename2.substr(0, filename2.length() - 5) + ".material";
                std::string matname2 = sbs->VerifyFile(matname);
                Ogre::DataStreamPtr stream = Ogre::ResourceGroupManager::getSingleton().openResource(matname2, path);
                Report("Loading material script " + matname2);
                Ogre::MaterialManager::getSingleton().parseScript(stream, path);
 
                if(stream)
                {
                        stream->seek(0);
                        while(!stream->eof())
                        {
                                std::string line = stream->getLine();
                                TrimString(line);
                                if (StartsWith(line, "material", true) == true)
                                {
                                        std::vector<std::string> vec = Ogre::StringUtil::split(line," \t:");
                                        for (std::vector<std::string>::iterator it = vec.begin(); it < vec.end(); ++it)
                                        {
                                                std::string match = (*it);
                                                TrimString(match);
                                                if (!match.empty())
                                                {
                                                        Ogre::MaterialPtr materialPtr = Ogre::MaterialManager::getSingleton().getByName(match, path);
                                                        if (materialPtr)
                                                        {
                                                                Report("Loading material " + match);
                                                                //materialPtr->compile();
                                                                materialPtr->load();
 
                                                                //set lighting
                                                                materialPtr->setLightingEnabled(false);
                                                                if (sbs->GetConfigBool("Skyscraper.SBS.Lighting", false) == true)
                                                                {
                                                                        materialPtr->setLightingEnabled(true);
                                                                        materialPtr->setAmbient(sbs->AmbientR, sbs->AmbientG, sbs->AmbientB);
                                                                }
                                                        }
                                                }
                                        }
                                }
                        }
                        stream->close();
                }
        }
        catch (Ogre::Exception &e)
        {
                ReportError("Error loading material file " + matname + "\n" + e.getDescription());
        }
 
        //load model
        bool status = MeshWrapper->LoadFromFile(filename2, path);
        if (status == false)
                return false;
 
        model_loaded = true;
        return true;
}
 
bool MeshObject::LoadColliderModel(Ogre::MeshPtr &collidermesh)
{
        if (Filename == "")
                return false;
 
        std::string filename1 = "data/";
        filename1.append(Filename);
        std::string filename2 = sbs->VerifyFile(filename1);
        std::string path = sbs->GetMountPath(filename2, filename2);
 
        //load collider model if physics is disabled
        if (is_physical == false)
        {
                std::string colname2;
 
                try
                {
                        std::string colname = filename2.substr(0, filename2.length() - 5) + ".collider.mesh";
                        colname2 = sbs->VerifyFile(colname);
                        collidermesh = Ogre::MeshManager::getSingleton().load(colname2, path);
                }
                catch (Ogre::Exception &e)
                {
                        return ReportError("No collider model for " + colname2 + "\n" + e.getDescription());
                }
        }
        return true;
}
 
bool MeshObject::LoadFromMesh(const std::string &meshname)
{
        //load mesh
        return MeshWrapper->LoadFromMesh(meshname);
}
 
bool MeshObject::UsingDynamicBuffers()
{
        return MeshWrapper->UseDynamicBuffers();
}
 
void MeshObject::ChangeHeight(Real newheight)
{
        //change height of all walls associated with this mesh object
 
        SBS_PROFILE("MeshObject::ChangeHeight");
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                Walls[i]->ChangeHeight(newheight);
        }
}
 
void MeshObject::EnableShadows(bool value)
{
        //enable shadows
 
        MeshWrapper->EnableShadows(value);
}
 
PolyMesh* MeshObject::GetPolyMesh()
{
        return polymesh;
}
 
bool MeshObject::IsPrepared()
{
        return prepared;
}
 
void MeshObject::ResetPrepare()
{
        prepared = false;
}
 
bool MeshObject::ReplaceTexture(const std::string &oldtexture, const std::string &newtexture)
{
        //replace polygon materials named oldtexture with newtexture
 
        //update associated polygons
        bool found = false;
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                bool result = Walls[i]->ReplaceTexture(oldtexture, newtexture);
                if (result == true)
                        found = true;
        }
        return found;
}
 
bool MeshObject::ChangeTexture(const std::string &texture, bool matcheck)
{
        //changes a texture
        //if matcheck is true, exit if old and new textures are the same
 
        //update associated polygons
        bool found = false;
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                bool result = Walls[i]->ChangeTexture(texture, matcheck);
                if (result == true)
                        found = true;
        }
        return found;
}
 
Real MeshObject::GetHeight()
{
        //returns the height of the mesh
 
        Real y = 0.0;
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                for (size_t j = 0; j < Walls[i]->GetPolygonCount(); j++)
                {
                        Polygon *poly = Walls[i]->GetPolygon(j);
 
                        if (!poly)
                                continue;
 
                        for (size_t k = 0; k < poly->geometry.size(); k++)
                        {
                                for (size_t l = 0; l < poly->geometry[k].size(); l++)
                                {
                                        Real new_y = poly->geometry[k][l].vertex.y;
                                        if (new_y > y)
                                                y = new_y;
                                }
                        }
                }
        }
 
        return sbs->ToLocal(y);
}
 
Real MeshObject::HitBeam(const Vector3 &origin, const Vector3 &direction, Real max_distance)
{
        //cast a ray and return the collision distance to the mesh
        //return -1 if no hit
 
        //cast a ray from the camera position downwards
        SBS_PROFILE("MeshObject::HitBeam");
 
        Vector3 position = sbs->ToRemote(origin - GetPosition());
        Ray ray (position, sbs->ToRemote(direction, false));
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                for (size_t j = 0; j < Walls[i]->GetPolygonCount(); j++)
                {
                        Polygon *poly = Walls[i]->GetPolygon(j);
 
                        if (!poly)
                                continue;
 
                        for (size_t k = 0; k < poly->triangles.size(); k++)
                        {
                                const Triangle &tri = poly->triangles[k];
                                Vector3 tri_a = poly->GetVertex(tri.a);
                                Vector3 tri_b = poly->GetVertex(tri.b);
                                Vector3 tri_c = poly->GetVertex(tri.c);
 
                                std::pair<bool, Real> result = Ogre::Math::intersects(ray, tri_a, tri_b, tri_c);
                                if (result.first == true)
                                {
                                        if (result.second <= sbs->ToRemote(max_distance))
                                                return sbs->ToLocal(result.second);
                                }
                        }
                }
        }
        return -1;
}
 
void MeshObject::CreateCollider()
{
        //set up triangle collider based on raw SBS mesh geometry
 
        SBS_PROFILE("MeshObject::CreateCollider");
 
        if (create_collider == false)
                return;
 
        //exit if collider already exists
        if (mBody)
                return;
 
        if (!GetSceneNode())
                return;
 
        //exit if mesh is empty
        if (Walls.size() == 0)
                return;
 
        unsigned int tricount = GetTriangleCount("", true);
        unsigned int vcount = GetVertexCount();
 
        try
        {
                //initialize collider shape
                OgreBulletCollisions::TriangleMeshCollisionShape* shape = new OgreBulletCollisions::TriangleMeshCollisionShape(vcount, tricount * 3);
 
                Real scale = GetSceneNode()->GetScale();
 
                //add vertices to shape
 
                int additions = 0;
                for (size_t i = 0; i < Walls.size(); i++)
                {
                        if (!Walls[i])
                                continue;
 
                        for (size_t j = 0; j < Walls[i]->GetPolygonCount(); j++)
                        {
                                Polygon *poly = Walls[i]->GetPolygon(j);
 
                                if (!poly)
                                        continue;
 
                                PolyArray polyarray;
 
                                for (size_t k = 0; k < poly->geometry.size(); k++)
                                {
                                        for (size_t l = 0; l < poly->geometry[k].size(); l++)
                                                polyarray.emplace_back(poly->geometry[k][l].vertex);
                                }
 
                                for (size_t k = 0; k < poly->triangles.size(); k++)
                                {
                                        const Triangle &tri = poly->triangles[k];
 
                                        Vector3 a = polyarray[tri.a];
                                        Vector3 b = polyarray[tri.b];
                                        Vector3 c = polyarray[tri.c];
 
                                        if (scale != 1.0)
                                        {
                                                a *= scale;
                                                b *= scale;
                                                c *= scale;
                                        }
 
                                        shape->AddTriangle(a, b, c);
                                        additions++;
                                }
                        }
                }
 
                //exit if no geometry
                if (additions == 0)
                        return;
 
                //finalize shape
                shape->Finish();
 
                //create a collider scene node
                if (!collider_node)
                        collider_node = GetSceneNode()->CreateChild(GetName() + " collider");
 
                //physics is not supported on triangle meshes; use CreateBoxCollider instead
                mBody = new OgreBulletDynamics::RigidBody(name, sbs->mWorld);
                mBody->setStaticShape(collider_node->GetRawSceneNode(), shape, 0.1f, 0.5f, false);
                mShape = shape;
 
                if (sbs->DeleteColliders == true)
                {
                        bool revert = false;
                        if (remove_on_disable == false)
                        {
                                remove_on_disable = true;
                                revert = true;
                        }
 
                        Enabled(false);
                        Enabled(true);
 
                        if (revert == true)
                                remove_on_disable = false;
                }
        }
        catch (Ogre::Exception &e)
        {
                ReportError("Error creating collider for '" + name + "'\n" + e.getDescription());
        }
}
 
void MeshObject::DeleteCollider()
{
        //delete mesh collider
 
        SBS_PROFILE("MeshObject::DeleteCollider");
 
        //exit if collider doesn't exist
        if (!mBody)
                return;
 
        //remove collider from world
        mBody->removeFromWorld();
 
        //delete collider object
        delete mBody;
        mBody = 0;
        mShape = 0;
}
 
Vector2 MeshObject::GetExtents(int coord, bool flip_z)
{
        //returns the smallest and largest values from a specified coordinate type
        //(x, y, or z) from the polygons of this mesh object.
        //first parameter must be either 1 (for x), 2 (for y) or 3 (for z)
 
        Real esmall = 0;
        Real ebig = 0;
        Real tempnum = 0;
 
        //return 0,0 if coord value is out of range
        if (coord < 1 || coord > 3)
                return Vector2(0, 0);
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                for (size_t j = 0; j < Walls[i]->GetPolygonCount(); j++)
                {
                        Polygon *poly = Walls[i]->GetPolygon(j);
 
                        if (!poly)
                                continue;
 
                        for (size_t k = 0; k < poly->geometry.size(); k++)
                        {
                                for (size_t l = 0; l < poly->geometry[k].size(); l++)
                                {
                                        Ogre::Vector3 vertex = poly->geometry[k][l].vertex;
 
                                        if (coord == 1)
                                                tempnum = poly->geometry[k][l].vertex.x;
                                        if (coord == 2)
                                                tempnum = poly->geometry[k][l].vertex.y;
                                        if (coord == 3)
                                        {
                                                if (flip_z == false)
                                                        tempnum = poly->geometry[k][l].vertex.z;
                                                else
                                                        tempnum = -poly->geometry[k][l].vertex.z;
                                        }
 
                                        if (j == 0)
                                        {
                                                esmall = tempnum;
                                                ebig = tempnum;
                                        }
                                        else
                                        {
                                                if (tempnum < esmall)
                                                        esmall = tempnum;
                                                if (tempnum > ebig)
                                                        ebig = tempnum;
                                        }
                                }
                        }
                }
        }
 
        return Vector2(esmall, ebig);
}
 
Wall* MeshObject::FindPolygon(const std::string &name, int &index)
{
        //finds a polygon by name in all associated wall objects
        //returns associated wall object and polygon index
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                int polygon = Walls[i]->FindPolygon(name);
                if (polygon > -1)
                {
                        index = polygon;
                        return Walls[i];
                }
        }
        index = -1;
        return 0;
}
 
bool MeshObject::InBoundingBox(const Vector3 &pos, bool check_y)
{
        //determine if position 'pos' is inside the mesh's bounding box
 
        Vector3 position = sbs->ToRemote(pos - GetPosition());
 
        if (Bounds->isNull() == true)
                return false;
 
        Vector3 min = Bounds->getMinimum();
        Vector3 max = Bounds->getMaximum();
 
        if (position.x >= min.x && position.x <= max.x && position.z >= min.z && position.z <= max.z)
        {
                if (check_y == false)
                        return true;
                else
                {
                        if (position.y >= min.y && position.y <= max.y)
                                return true;
                }
        }
        return false;
}
 
DynamicMesh* MeshObject::GetDynamicMesh()
{
        return MeshWrapper;
}
 
void MeshObject::GetMeshInformation(const Ogre::Mesh* const mesh, int &vertex_count, Vector3* &vertices, int &index_count, unsigned long* &indices, Ogre::AxisAlignedBox &extents)
{
        //read hardware buffers from a loaded model mesh, and return geometry arrays
 
        bool added_shared = false;
        size_t current_offset = 0;
        size_t shared_offset = 0;
        size_t next_offset = 0;
        size_t index_offset = 0;
 
        vertex_count = index_count = 0;
 
        // Calculate how many vertices and indices we're going to need
        for (unsigned short i = 0; i < mesh->getNumSubMeshes(); i++)
        {
                Ogre::SubMesh* submesh = mesh->getSubMesh(i);
 
                // We only need to add the shared vertices once
                if (submesh->useSharedVertices)
                {
                        if (!added_shared)
                        {
                                vertex_count += (int)mesh->sharedVertexData->vertexCount;
                                added_shared = true;
                        }
                }
                else
                {
                        vertex_count += (int)submesh->vertexData->vertexCount;
                }
 
                // Add the indices
                index_count += (int)submesh->indexData->indexCount;
        }
 
        //ensure minimum index count
        if (index_count < 3)
                return;
 
        // Allocate space for the vertices and indices
        vertices = new Vector3[vertex_count];
        indices = new unsigned long[index_count];
 
        added_shared = false;
 
        // Run through the submeshes again, adding the data into the arrays
        for (unsigned short i = 0; i < mesh->getNumSubMeshes(); i++)
        {
                Ogre::SubMesh* submesh = mesh->getSubMesh(i);
                Ogre::VertexData* vertex_data = submesh->useSharedVertices ? mesh->sharedVertexData : submesh->vertexData;
 
                if ((!submesh->useSharedVertices) || (submesh->useSharedVertices && !added_shared))
                {
                        if(submesh->useSharedVertices)
                        {
                                added_shared = true;
                                shared_offset = current_offset;
                        }
 
                        const Ogre::VertexElement* posElem =
                                vertex_data->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
 
                        Ogre::HardwareVertexBufferSharedPtr vbuf =
                                vertex_data->vertexBufferBinding->getBuffer(posElem->getSource());
 
                        unsigned char* vertex =
                                static_cast<unsigned char*>(vbuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
 
                        float* pReal;
 
                        for (size_t j = 0; j < vertex_data->vertexCount; j++, vertex += vbuf->getVertexSize())
                        {
                                posElem->baseVertexPointerToElement(vertex, &pReal);
                                Vector3 pt(pReal[0], pReal[1], pReal[2]);
                                //vertices[current_offset + j] = (orient * (pt * scale)) + position;
                                vertices[current_offset + j] = pt * sbs->ToRemote(GetSceneNode()->GetScale());
                                extents.merge(vertices[current_offset + j]);
                        }
 
                        vbuf->unlock();
                        next_offset += vertex_data->vertexCount;
                }
 
                Ogre::IndexData* index_data = submesh->indexData;
                size_t numTris = index_data->indexCount / 3;
                Ogre::HardwareIndexBufferSharedPtr ibuf = index_data->indexBuffer;
 
                bool use32bitindexes = (ibuf->getType() == Ogre::HardwareIndexBuffer::IT_32BIT);
 
                unsigned long* pLong = static_cast<unsigned long*>(ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
                unsigned short* pShort = reinterpret_cast<unsigned short*>(pLong);
 
                size_t offset = (submesh->useSharedVertices)? shared_offset : current_offset;
 
                if (use32bitindexes)
                {
                        for (size_t k = 0; k < numTris * 3; k++)
                        {
                                indices[index_offset++] = pLong[k] + static_cast<unsigned long>(offset);
                        }
                }
                else
                {
                        for (size_t k = 0; k < numTris * 3; k++)
                        {
                                indices[index_offset++] = static_cast<unsigned long>(pShort[k]) + static_cast<unsigned long>(offset);
                        }
                }
 
                ibuf->unlock();
                current_offset = next_offset;
        }
}
 
unsigned int MeshObject::GetVertexCount()
{
        unsigned int total = 0;
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (Walls[i])
                        total += Walls[i]->GetVertexCount();
        }
 
        return total;
}
 
unsigned int MeshObject::GetTriangleCount(const std::string &material, bool total)
{
        unsigned int tris = 0;
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (Walls[i])
                {
                        for (int j = 0; j < Walls[i]->GetPolygonCount(); j++)
                        {
                                Polygon *poly = Walls[i]->GetPolygon(j);
 
                                if (poly)
                                {
                                        if (poly->material == material || (material == "" && total == true))
                                                tris += poly->triangles.size();
                                }
                        }
                }
        }
 
        return tris;
}
 
void MeshObject::SetMaterial(const std::string& material)
{
        //set material of this mesh object
 
        MeshWrapper->SetMaterial(material);
}
 
void MeshObject::EnablePhysics(bool value, Real restitution, Real friction, Real mass)
{
        //Enables or disables physics on the mesh, the physics properties
        //and collider will be set up on the object later during the SBS::Prepare() stage
 
        is_physical = value;
        this->restitution = restitution;
        this->friction = friction;
        this->mass = mass;
 
        //use box collider if physics should be enabled
        if (is_physical == true)
                tricollider = false;
 
        LoadColliderModel(collidermesh);
 
        //set up collider for model (if mesh loaded from a filename)
        if ((Filename != "" || Meshname != "") && create_collider == true)
        {
                if (collidermesh.get() && Filename != "")
                {
                        //create collider based on provided mesh collider
                        int vertex_count, index_count;
                        Vector3* vertices;
                        long unsigned int* indices;
                        Ogre::AxisAlignedBox box;
                        GetMeshInformation(collidermesh.get(), vertex_count, vertices, index_count, indices, box);
                        CreateColliderFromModel(vertex_count, vertices, index_count, indices);
                        delete[] vertices;
                        delete[] indices;
                        Ogre::MeshManager::getSingleton().remove(collidermesh->getHandle());
                }
                else
                {
                        //create generic box collider if separate mesh collider isn't available
                        GetBounds();
                        CreateBoxCollider();
                }
        }
}
 
size_t MeshObject::GetSize()
{
        //return size in bytes of this mesh object
 
        if (size > 0)
                return size;
 
        for (size_t i = 0; i < Walls.size(); i++)
        {
                if (!Walls[i])
                        continue;
 
                for (size_t j = 0; j < Walls[i]->GetPolygonCount(); j++)
                {
                        Polygon *poly = Walls[i]->GetPolygon(j);
 
                        if (!poly)
                                continue;
 
                        size += poly->size;
                }
        }
 
        return size;
}
 
}