public ModelRoot CreateTerrainMesh(HeightMap heightMap, GenOptions options = GenOptions.None, Matrix4x4 vectorTransform = default, bool doubleSided = true)
{
Triangulation triangulation = default;
if (options.HasFlag(GenOptions.BoxedBaseElevation0))
{
triangulation = _meshService.GenerateTriangleMesh_Boxed(heightMap, BoxBaseThickness.FixedElevation, 0);
}
else if (options.HasFlag(GenOptions.BoxedBaseElevationMin))
{
triangulation = _meshService.GenerateTriangleMesh_Boxed(heightMap, BoxBaseThickness.FromMinimumPoint, 5);
}
else
{
triangulation = _meshService.TriangulateHeightMap(heightMap);
}
// create a basic scene
var model = CreateNewModel();
var rnode = model.LogicalScenes.First()?.FindNode(n => n.Name == TERRAIN_NODE_NAME);
var rmesh = rnode.Mesh = model.CreateMesh(TERRAIN_MESH_NAME);
var material = model.CreateMaterial("Default")
.WithPBRMetallicRoughness()
.WithDoubleSide(doubleSided);
var indexedTriangulation = new IndexedTriangulation(triangulation, vectorTransform);
// create mesh primitive
var primitive = rmesh.CreatePrimitive()
.WithVertexAccessor("POSITION", indexedTriangulation.Positions);
if (options.HasFlag(GenOptions.Normals))
{
var normals = _meshService.ComputeMeshNormals(indexedTriangulation.Positions, indexedTriangulation.Indices);
primitive = primitive.WithVertexAccessor("NORMAL", normals.ToList());
}
primitive = primitive.WithIndicesAccessor(PrimitiveType.TRIANGLES, indexedTriangulation.Indices)
.WithMaterial(material);
return(model);
}
/// <summary>
/// Generate a triangle mesh from supplied height map, triangulating and optionaly mapping UVs
/// and generate sides and bottom (like a box where the top is the triangulated height map)
/// </summary>
/// <param name="heightMap">Height map.</param>
/// <param name="thickness">Determines how box height will be calculated</param>
/// <param name="zValue">Z value to apply for box calculation</param>
/// <returns></returns>
public MeshPrimitive GenerateTriangleMesh_Boxed(HeightMap heightMap, BoxBaseThickness thickness = BoxBaseThickness.FixedElevation, float zValue = 0f)
{
Triangulation triangulation = _meshService.GenerateTriangleMesh_Boxed(heightMap, thickness, zValue);
return(GenerateTriangleMesh(triangulation));
}
