// TODO: redo terrain implementation selection to allow other base types than heightMap.
private BSTerrainPhys BuildPhysicalTerrain(uint id, float[] heightMap)
{
// Find high and low points of passed heightmap.
// The min and max passed in is usually the area objects can be in (maximum
// object height, for instance). The terrain wants the bounding box for the
// terrain so replace passed min and max Z with the actual terrain min/max Z.
float minZ = float.MaxValue;
float maxZ = float.MinValue;
foreach (float height in heightMap)
{
if (height < minZ)
{
minZ = height;
}
if (height > maxZ)
{
maxZ = height;
}
}
if (minZ == maxZ)
{
// If min and max are the same, reduce min a little bit so a good bounding box is created.
minZ -= BSTerrainManager.HEIGHT_EQUAL_FUDGE;
}
Vector3 minCoords = new Vector3(0, 0, minZ);
Vector3 maxCoords = new Vector3(PhysicsScene.Scene.RegionInfo.RegionSizeX,
PhysicsScene.Scene.RegionInfo.RegionSizeY, maxZ);
PhysicsScene.Logger.DebugFormat("{0} Terrain for {1}/ created with {2}",
LogHeader, PhysicsScene.RegionName,
(BSTerrainPhys.TerrainImplementation)BSParam.TerrainImplementation);
BSTerrainPhys newTerrainPhys = null;
switch ((int)BSParam.TerrainImplementation)
{
case (int)BSTerrainPhys.TerrainImplementation.Heightmap:
newTerrainPhys = new BSTerrainHeightmap(PhysicsScene, Vector3.Zero, id,
heightMap, minCoords, maxCoords);
break;
case (int)BSTerrainPhys.TerrainImplementation.Mesh:
newTerrainPhys = new BSTerrainMesh(PhysicsScene, Vector3.Zero, id,
heightMap, minCoords, maxCoords);
break;
default:
PhysicsScene.Logger.ErrorFormat("{0} Bad terrain implementation specified. Type={1}/{2},Region={3}",
LogHeader,
(int)BSParam.TerrainImplementation,
BSParam.TerrainImplementation,
PhysicsScene.RegionName);
break;
}
return(newTerrainPhys);
}
// Create terrain mesh from a heightmap.
public BSTerrainMesh(BSScene physicsScene, Vector3 regionBase, uint id, float[] initialMap,
Vector3 minCoords, Vector3 maxCoords)
: base(physicsScene, regionBase, id)
{
int indicesCount;
int[] indices;
int verticesCount;
float[] vertices;
m_savedHeightMap = initialMap;
m_sizeX = (int)(maxCoords.X - minCoords.X);
m_sizeY = (int)(maxCoords.Y - minCoords.Y);
bool meshCreationSuccess = false;
if (BSParam.TerrainMeshMagnification == 1)
{
// If a magnification of one, use the old routine that is tried and true.
meshCreationSuccess = BSTerrainMesh.ConvertHeightmapToMesh(PhysicsScene,
initialMap, m_sizeX, m_sizeY, // input size
Vector3.Zero, // base for mesh
out indicesCount, out indices, out verticesCount, out vertices);
}
else
{
// Other magnifications use the newer routine
meshCreationSuccess = BSTerrainMesh.ConvertHeightmapToMesh2(PhysicsScene,
initialMap, m_sizeX, m_sizeY, // input size
BSParam.TerrainMeshMagnification,
physicsScene.TerrainManager.WorldMax,
Vector3.Zero, // base for mesh
out indicesCount, out indices, out verticesCount, out vertices);
}
if (!meshCreationSuccess)
{
// DISASTER!!
PhysicsScene.DetailLog("{0},BSTerrainMesh.create,failedConversionOfHeightmap,id={1}",
BSScene.DetailLogZero, ID);
PhysicsScene.Logger.ErrorFormat("{0} Failed conversion of heightmap to mesh! base={1}", LogHeader,
TerrainBase);
// Something is very messed up and a crash is in our future.
return;
}
PhysicsScene.DetailLog("{0},BSTerrainMesh.create,meshid,id={1},indices={2},indSz={3},vertices={4},vertSz={5}",
BSScene.DetailLogZero, ID, indicesCount, indices.Length, verticesCount, vertices.Length);
m_terrainShape = PhysicsScene.PE.CreateMeshShape(PhysicsScene.World, indicesCount, indices, verticesCount,
vertices);
if (!m_terrainShape.HasPhysicalShape)
{
// DISASTER!!
PhysicsScene.DetailLog("{0},BSTerrainMesh.create,failedCreationOfShape,id={1}", BSScene.DetailLogZero,
ID);
PhysicsScene.Logger.ErrorFormat("{0} Failed creation of terrain mesh! base={1}", LogHeader, TerrainBase);
// Something is very messed up and a crash is in our future.
return;
}
Vector3 pos = regionBase;
Quaternion rot = Quaternion.Identity;
m_terrainBody = PhysicsScene.PE.CreateBodyWithDefaultMotionState(m_terrainShape, ID, pos, rot);
if (!m_terrainBody.HasPhysicalBody)
{
// DISASTER!!
PhysicsScene.Logger.ErrorFormat("{0} Failed creation of terrain body! base={1}", LogHeader, TerrainBase);
// Something is very messed up and a crash is in our future.
return;
}
physicsScene.PE.SetShapeCollisionMargin(m_terrainShape, BSParam.TerrainCollisionMargin);
// Set current terrain attributes
PhysicsScene.PE.SetFriction(m_terrainBody, BSParam.TerrainFriction);
PhysicsScene.PE.SetHitFraction(m_terrainBody, BSParam.TerrainHitFraction);
PhysicsScene.PE.SetRestitution(m_terrainBody, BSParam.TerrainRestitution);
PhysicsScene.PE.SetContactProcessingThreshold(m_terrainBody, BSParam.TerrainContactProcessingThreshold);
PhysicsScene.PE.SetCollisionFlags(m_terrainBody, CollisionFlags.CF_STATIC_OBJECT);
// Static objects are not very massive.
PhysicsScene.PE.SetMassProps(m_terrainBody, 0f, Vector3.Zero);
// Put the new terrain to the world of physical objects
PhysicsScene.PE.AddObjectToWorld(PhysicsScene.World, m_terrainBody);
// Redo its bounding box now that it is in the world
PhysicsScene.PE.UpdateSingleAabb(PhysicsScene.World, m_terrainBody);
m_terrainBody.collisionType = CollisionType.Terrain;
m_terrainBody.ApplyCollisionMask(PhysicsScene);
if (BSParam.UseSingleSidedMeshes)
{
PhysicsScene.DetailLog("{0},BSTerrainMesh.settingCustomMaterial,id={1}", BSScene.DetailLogZero, id);
PhysicsScene.PE.AddToCollisionFlags(m_terrainBody, CollisionFlags.CF_CUSTOM_MATERIAL_CALLBACK);
}
// Make it so the terrain will not move or be considered for movement.
PhysicsScene.PE.ForceActivationState(m_terrainBody, ActivationState.DISABLE_SIMULATION);
}
