CCmpTerrain.cpp

Go to the documentation of this file.

/* Copyright (C) 2013 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. 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.
 *
 * 0 A.D. 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 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "precompiled.h"

#include "simulation2/system/Component.h"
#include "ICmpTerrain.h"

#include "ICmpObstructionManager.h"
#include "ICmpRangeManager.h"
#include "simulation2/MessageTypes.h"

#include "graphics/Terrain.h"
#include "renderer/Renderer.h"
#include "renderer/WaterManager.h"
#include "maths/Vector3D.h"

class CCmpTerrain : public ICmpTerrain
{
public:
    static void ClassInit(CComponentManager& UNUSED(componentManager))
    {
    }

    DEFAULT_COMPONENT_ALLOCATOR(Terrain)

    CTerrain* m_Terrain; // not null

    static std::string GetSchema()
    {
        return "<a:component type='system'/><empty/>";
    }

    virtual void Init(const CParamNode& UNUSED(paramNode))
    {
        m_Terrain = &GetSimContext().GetTerrain();
    }

    virtual void Deinit()
    {
    }

    virtual void Serialize(ISerializer& UNUSED(serialize))
    {
    }

    virtual void Deserialize(const CParamNode& paramNode, IDeserializer& UNUSED(deserialize))
    {
        Init(paramNode);
    }

    virtual bool IsLoaded()
    {
        return m_Terrain->GetVerticesPerSide() != 0;
    }

    virtual CFixedVector3D CalcNormal(entity_pos_t x, entity_pos_t z)
    {
        CFixedVector3D normal;
        m_Terrain->CalcNormalFixed((x / (int)TERRAIN_TILE_SIZE).ToInt_RoundToZero(), (z / (int)TERRAIN_TILE_SIZE).ToInt_RoundToZero(), normal);
        return normal;
    }

    virtual CVector3D CalcExactNormal(float x, float z)
    {
        return m_Terrain->CalcExactNormal(x, z);
    }

    virtual entity_pos_t GetGroundLevel(entity_pos_t x, entity_pos_t z)
    {
        // TODO: this can crash if the terrain heightmap isn't initialised yet

        return m_Terrain->GetExactGroundLevelFixed(x, z);
    }

    virtual float GetExactGroundLevel(float x, float z)
    {
        return m_Terrain->GetExactGroundLevel(x, z);
    }

    virtual u16 GetTilesPerSide()
    {
        ssize_t tiles = m_Terrain->GetTilesPerSide();
        ENSURE(1 <= tiles && tiles <= 65535);
        return (u16)tiles;
    }

    virtual u16 GetVerticesPerSide()
    {
        ssize_t vertices = m_Terrain->GetVerticesPerSide();
        ENSURE(1 <= vertices && vertices <= 65535);
        return (u16)vertices;
    }

    virtual CTerrain* GetCTerrain()
    {
        return m_Terrain;
    }

    virtual void ReloadTerrain()
    {
        // TODO: should refactor this code to be nicer

        u16 tiles = GetTilesPerSide();
        u16 vertices = GetVerticesPerSide();

        CmpPtr<ICmpObstructionManager> cmpObstructionManager(GetSystemEntity());
        if (cmpObstructionManager)
        {
            cmpObstructionManager->SetBounds(entity_pos_t::Zero(), entity_pos_t::Zero(),
                    entity_pos_t::FromInt(tiles*(int)TERRAIN_TILE_SIZE),
                    entity_pos_t::FromInt(tiles*(int)TERRAIN_TILE_SIZE));
        }

        CmpPtr<ICmpRangeManager> cmpRangeManager(GetSystemEntity());
        if (cmpRangeManager)
        {
            cmpRangeManager->SetBounds(entity_pos_t::Zero(), entity_pos_t::Zero(),
                    entity_pos_t::FromInt(tiles*(int)TERRAIN_TILE_SIZE),
                    entity_pos_t::FromInt(tiles*(int)TERRAIN_TILE_SIZE),
                    vertices);
        }
        
        if (CRenderer::IsInitialised())
            g_Renderer.GetWaterManager()->SetMapSize(vertices);

        MakeDirty(0, 0, tiles+1, tiles+1);
    }

    virtual void MakeDirty(i32 i0, i32 j0, i32 i1, i32 j1)
    {
        CMessageTerrainChanged msg(i0, j0, i1, j1);
        GetSimContext().GetComponentManager().PostMessage(GetEntityId(), msg);
    }
};

REGISTER_COMPONENT_TYPE(Terrain)