polygon.cpp

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/*
        Scalable Building Simulator - Polygon 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 "globals.h"
#include "sbs.h"
#include "dynamicmesh.h"
#include "triangle.h"
#include "mesh.h"
#include "polymesh.h"
#include "texture.h"
#include "utility.h"
#include "polygon.h"
 
namespace SBS {
 
Polygon::Polygon(Object *parent, const std::string &name, MeshObject *meshwrapper, GeometrySet &geometry, std::vector<Triangle> &triangles, Matrix3 &tex_matrix, Vector3 &tex_vector, const std::string &material, Plane &plane) : ObjectBase(parent)
{
        mesh = meshwrapper;
        t_matrix = tex_matrix;
        t_vector = tex_vector;
        this->material = material;
        this->plane = plane;
        this->geometry = geometry;
        this->triangles = triangles;
        SetName(name);
        size = triangles.size() * (sizeof(unsigned int) * 3);
 
        vertex_count = 0;
        for (size_t i = 0; i < geometry.size(); i++)
        {
                vertex_count += geometry[i].size();
                size += geometry[i].size() * sizeof(Geometry);
        }
 
        mesh->ResetPrepare();
 
        sbs->PolygonCount++;
 
        //register texture usage
        if (material != "")
                sbs->GetTextureManager()->IncrementTextureUsage(material);
}
 
Polygon::~Polygon()
{
        if (material != "" && sbs->FastDelete == false)
                sbs->GetTextureManager()->DecrementTextureUsage(material);
 
        mesh->ResetPrepare();
 
        sbs->PolygonCount--;
}
 
void Polygon::GetTextureMapping(Matrix3 &tm, Vector3 &tv)
{
        //return texture mapping matrix and vector
        tm = t_matrix;
        tv = t_vector;
}
 
void Polygon::Move(const Vector3 &vector, Real speed)
{
        bool dynamic = mesh->UsingDynamicBuffers();
 
        for (size_t i = 0; i < geometry.size(); i++)
        {
                for (size_t j = 0; j < geometry[i].size(); j++)
                {
                        Polygon::Geometry &data = geometry[i][j];
                        data.vertex += sbs->ToRemote(vector * speed);
                }
        }
 
        //update vertices in render buffer, if using dynamic buffers
        if (dynamic == true)
                mesh->MeshWrapper->UpdateVertices(mesh, material, this, true);
}
 
Plane Polygon::GetAbsolutePlane()
{
        //convert to an absolute plane
        Plane plane2(plane.normal, sbs->ToRemote(mesh->GetPosition()));
        return Plane(plane.normal, -(plane.d + plane2.d));
}
 
Vector2 Polygon::GetExtents(int coord)
{
        //returns the extents of a polygon
        //coord must be either 1 (for x), 2 (for y) or 3 (for z)
 
        //return 0,0 if coord value is out of range
        if (coord < 1 || coord > 3)
                return Vector2(0, 0);
 
        //get polygon extents
        PolyArray poly;
        for (size_t i = 0; i < geometry.size(); i++)
        {
                for (size_t j = 0; j < geometry[i].size(); j++)
                {
                        poly.emplace_back(geometry[i][j].vertex);
                }
        }
 
        Vector2 extents = sbs->GetUtility()->GetExtents(poly, coord);
 
        return extents;
}
 
void Polygon::ChangeHeight(Real newheight)
{
        bool dynamic = mesh->UsingDynamicBuffers();
 
        Vector2 extents = GetExtents(2);
 
        for (size_t i = 0; i < geometry.size(); i++)
        {
                for (size_t j = 0; j < geometry[i].size(); j++)
                {
                        Polygon::Geometry &data = geometry[i][j];
                        if (data.vertex.y == extents.y)
                                data.vertex.y = sbs->ToRemote(newheight);
                }
        }
 
        //update vertices in render buffer, if using dynamic buffers
        if (dynamic == true)
                mesh->MeshWrapper->UpdateVertices(mesh, material, this, true);
}
 
bool Polygon::ReplaceTexture(const std::string &oldtexture, const std::string &newtexture)
{
        //replace material named oldtexture with newtexture
 
        if (oldtexture == newtexture)
                return false;
 
        if (material == oldtexture)
        {
                std::string old = material;
                sbs->GetTextureManager()->DecrementTextureUsage(oldtexture);
                material = newtexture;
                sbs->GetTextureManager()->IncrementTextureUsage(newtexture);
 
                bool result = mesh->GetDynamicMesh()->ChangeTexture(oldtexture, newtexture, mesh);
                if (result == false)
                {
                        material = old; //revert name
                        return false;
                }
 
                //mesh->ResetPrepare();
                return true;
        }
        return false;
}
 
bool Polygon::ChangeTexture(const std::string &texture, bool matcheck)
{
        //changes a texture
        //if matcheck is true, exit if old and new textures are the same
 
        if (matcheck == true)
        {
                if (material == texture)
                        return false;
        }
 
        std::string old = material;
        sbs->GetTextureManager()->DecrementTextureUsage(material);
        material = texture;
        sbs->GetTextureManager()->IncrementTextureUsage(texture);
 
        bool result = mesh->GetDynamicMesh()->ChangeTexture(old, texture, mesh);
        if (result == false)
        {
                material = old; //revert name
                return false;
        }
 
        //mesh->ResetPrepare();
        return true;
}
 
Vector3 Polygon::GetVertex(int index)
{
        int offset = 0;
        for (size_t i = 0; i < geometry.size(); i++)
        {
                for (size_t j = 0; j < geometry[i].size(); j++)
                {
                        if (index == offset + j)
                                return geometry[i][j].vertex;
                }
                offset += geometry[i].size();
        }
        return Vector3::ZERO;
}
 
}