public override void Calculate(TerrainModel model, MeshGeometry3D mesh) { var normals = MeshGeometryHelper.CalculateNormals(mesh); var texcoords = new PointCollection(); for (int i = 0; i < normals.Count; i++) { double slopedir = Math.Atan2(normals[i].Y, normals[i].X) * 180 / Math.PI; if (slopedir < 0) { slopedir += 360; } double u = slopedir / 360; texcoords.Add(new Point(u, u)); } TextureCoordinates = texcoords; Material = MaterialHelper.CreateMaterial(Brush); }
public override void Calculate(TerrainModel model, MeshGeometry3D mesh) { var normals = MeshGeometryHelper.CalculateNormals(mesh); var texcoords = new PointCollection(); var up = new Vector3D(0, 0, 1); for (int i = 0; i < normals.Count; i++) { double slope = Math.Acos(Vector3D.DotProduct(normals[i], up)) * 180 / Math.PI; double u = slope / 40; if (u > 1) { u = 1; } if (u < 0) { u = 0; } texcoords.Add(new Point(u, u)); } TextureCoordinates = texcoords; Material = MaterialHelper.CreateMaterial(Brush); }