private NavigationMeshDebugVisual CreateDebugVisual(NavigationMesh navigationMesh, NavigationMesh previousNavigationMesh)
{
NavigationMeshDebugVisual ret = new NavigationMeshDebugVisual();
ret.DebugEntity = new Entity($"Debug entity for navigation mesh");
// Create a visual for every layer with a separate color
using (var layers = navigationMesh.Layers.GetEnumerator())
{
while (layers.MoveNext())
{
Model model = new Model();
var currentLayer = layers.Current.Value;
var currentId = layers.Current.Key;
NavigationMeshDisplayGroup displayGroup;
if (!groupDisplaySettings.TryGetValue(currentId, out displayGroup))
{
continue; // No display settings for this group
}
model.Add(displayGroup.Material);
model.Add(displayGroup.HighlightMaterial);
foreach (var p in currentLayer.Tiles)
{
bool updated = true;
NavigationMeshTile tile = p.Value;
// Extract vertex data
List <Vector3> tileVertexList = new List <Vector3>();
List <int> tileIndexList = new List <int>();
if (!tile.GetTileVertices(tileVertexList, tileIndexList))
{
continue;
}
// Check if updated
NavigationMeshLayer sourceLayer;
if (previousNavigationMesh != null && previousNavigationMesh.Layers.TryGetValue(currentId, out sourceLayer))
{
NavigationMeshTile oldTile = sourceLayer.FindTile(p.Key);
if (oldTile != null && oldTile.Data.SequenceEqual(tile.Data))
{
updated = false;
}
}
// Stack layers vertically
Vector3 offset = new Vector3(0.0f, LayerHeightMultiplier * displayGroup.Index, 0.0f);
// Calculate mesh bounding box from navigation mesh points
BoundingBox bb = BoundingBox.Empty;
List <VertexPositionNormalTexture> meshVertices = new List <VertexPositionNormalTexture>();
for (int i = 0; i < tileVertexList.Count; i++)
{
Vector3 position = tileVertexList[i] + offset;
BoundingBox.Merge(ref bb, ref position, out bb);
VertexPositionNormalTexture vert = new VertexPositionNormalTexture();
vert.Position = position;
vert.Normal = Vector3.UnitY;
vert.TextureCoordinate = new Vector2(0.5f, 0.5f);
meshVertices.Add(vert);
}
MeshDraw draw;
using (var meshData = new GeometricMeshData <VertexPositionNormalTexture>(meshVertices.ToArray(), tileIndexList.ToArray(), true))
{
GeometricPrimitive primitive = new GeometricPrimitive(game.GraphicsDevice, meshData);
ret.GeneratedDynamicPrimitives.Add(primitive);
draw = primitive.ToMeshDraw();
}
Mesh mesh = new Mesh
{
Draw = draw,
MaterialIndex = updated ? 1 : 0,
BoundingBox = bb
};
model.Add(mesh);
}
// Create an entity per layer
var layerEntity = new Entity($"Navigation group {currentId}");
// Add a new model component
var modelComponent = new ModelComponent(model);
layerEntity.Add(modelComponent);
modelComponent.Enabled = displayGroup.IsVisible;
ret.ModelComponents.Add(currentId, modelComponent);
ret.DebugEntity.AddChild(layerEntity);
}
}
return(ret);
}