Move terrain grid implementation to a component so the editor can use it (Feature #1597)

apps/openmw/CMakeLists.txt

@@ -23,7 +23,7 @@ add_openmw_dir (mwrender
     renderingmanager debugging sky camera animation npcanimation creatureanimation activatoranimation
     actors objects renderinginterface localmap occlusionquery water shadows
     characterpreview globalmap videoplayer ripplesimulation refraction
-    terrainstorage renderconst effectmanager weaponanimation terraingrid
+    terrainstorage renderconst effectmanager weaponanimation
     )
 
 add_openmw_dir (mwinput

apps/openmw/mwrender/renderingmanager.cpp

@@ -23,6 +23,7 @@
 
 #include <components/settings/settings.hpp>
 #include <components/terrain/defaultworld.hpp>
+#include <components/terrain/terraingrid.hpp>
 
 #include "../mwworld/esmstore.hpp"
 #include "../mwworld/class.hpp"
@@ -45,7 +46,6 @@
 #include "globalmap.hpp"
 #include "terrainstorage.hpp"
 #include "effectmanager.hpp"
-#include "terraingrid.hpp"
 
 using namespace MWRender;
 using namespace Ogre;
@@ -1045,7 +1045,7 @@ void RenderingManager::enableTerrain(bool enable)
                 mTerrain = new Terrain::DefaultWorld(mRendering.getScene(), new MWRender::TerrainStorage(), RV_Terrain,
                                                 Settings::Manager::getBool("shader", "Terrain"), Terrain::Align_XY, 1, 64);
             else
-                mTerrain = new MWRender::TerrainGrid(mRendering.getScene(), new MWRender::TerrainStorage(), RV_Terrain,
+                mTerrain = new Terrain::TerrainGrid(mRendering.getScene(), new MWRender::TerrainStorage(), RV_Terrain,
                                                 Settings::Manager::getBool("shader", "Terrain"), Terrain::Align_XY);
             mTerrain->applyMaterials(Settings::Manager::getBool("enabled", "Shadows"),
                                      Settings::Manager::getBool("split", "Shadows"));

components/CMakeLists.txt

@@ -76,7 +76,7 @@ add_component_dir (translation
 
 add_definitions(-DTERRAIN_USE_SHADER=1)
 add_component_dir (terrain
-    quadtreenode chunk world defaultworld storage material buffercache defs
+    quadtreenode chunk world defaultworld terraingrid storage material buffercache defs
     )
 
 add_component_dir (loadinglistener

components/terrain/terraingrid.cpp

@@ -4,12 +4,9 @@
 #include <OgreSceneNode.h>
 #include <OgreAxisAlignedBox.h>
 
-#include "../mwbase/environment.hpp"
-#include "../mwbase/world.hpp"
+#include "chunk.hpp"
 
-#include <components/terrain/chunk.hpp>
-
-namespace MWRender
+namespace Terrain
 {
 
 TerrainGrid::TerrainGrid(Ogre::SceneManager *sceneMgr, Terrain::Storage *storage, int visibilityFlags, bool shaders, Terrain::Alignment align)
@@ -145,8 +142,10 @@ void TerrainGrid::setVisible(bool visible)
 
 Ogre::AxisAlignedBox TerrainGrid::getWorldBoundingBox (const Ogre::Vector2& center)
 {
-    int cellX, cellY;
-    MWBase::Environment::get().getWorld()->positionToIndex(center.x, center.y, cellX, cellY);
+    float cellSize = getStorage()->getCellWorldSize();
+
+    int cellX = std::floor(center.x/cellSize);
+    int cellY = std::floor(center.y/cellSize);
 
     Grid::iterator it = mGrid.find(std::make_pair(cellX, cellY));
     if (it == mGrid.end())

components/terrain/terraingrid.hpp

@@ -1,16 +1,12 @@
-#ifndef OPENMW_MWRENDER_TERRAINGRID_H
-#define OPENMW_MWRENDER_TERRAINGRID_H
+#ifndef COMPONENTS_TERRAIN_TERRAINGRID_H
+#define COMPONENTS_TERRAIN_TERRAINGRID_H
 
-#include <components/terrain/world.hpp>
-#include <components/terrain/material.hpp>
+#include "world.hpp"
+#include "material.hpp"
 
 namespace Terrain
 {
     class Chunk;
-}
-
-namespace MWRender
-{
 
     struct GridElement
     {