static void RenderTriangles(VoxelData voxelData, int size, SKCanvas canvas, MeshSettings settings)
{
var matrix = GetMatrix(voxelData, size);
settings.MeshType = MeshType.Triangles;
var triangles = new MeshBuilder(voxelData, settings);
using (var fill = new SKPaint()) {
var vertices = triangles.Vertices
.Select(v => matrix.MapScalars(v.X, v.Z, -v.Y, 1f))
.Select(v => new SKPoint(v[0], v[1]))
.ToArray();
var colors = triangles.Colors;
var occlusion = triangles.Occlusion;
var indices = triangles.Faces;
// Render triangles in batches since SkiaSharp DrawVertices indices are 16 bit which fails for large files
var batchSize = 3 * 20000; // up to 20000 triangles per batch
for (var i = 0; i < indices.Length; i += batchSize)
{
var batch = Enumerable.Range(i, Math.Min(batchSize, indices.Length - i));
var _vertices = batch.Select(j => vertices[indices[j]]).ToArray();
var _colors = batch.Select(j => AmbientOcclusion.CombineColorOcclusion(colors[indices[j]], occlusion[indices[j]])).Select(ToSKColor).ToArray();
var _indices = batch.Select(j => (ushort)(j - i)).ToArray();
canvas.DrawVertices(SKVertexMode.Triangles, _vertices, null, _colors, _indices, fill);
}
}
}
public static void VoxelsToUnity(GameObject go, Mesh mesh, VoxelData voxelData, MeshSettings settings)
{
// Recenter the .vox model so the bottom is at the origin
var matrix = Matrix4x4.Translate(new Vector3(-voxelData.size.X * 0.5f, 0, -voxelData.size.Y * 0.5f));
// Convert a Voxel mesh to a Unity mesh
var meshBuilder = new MeshBuilder(voxelData, settings);
mesh.Clear();
mesh.vertices = meshBuilder.Vertices.Select(v => matrix.MultiplyPoint(new Vector3(v.X, v.Z, v.Y))).ToArray();
mesh.normals = meshBuilder.Normals.Select(n => matrix.MultiplyVector(new Vector3(n.X, n.Z, n.Y))).ToArray();
mesh.triangles = meshBuilder.Faces.Select(f => (int)f).ToArray();
// Combine occlusion with vertex colors
var colors = meshBuilder.Colors;
var occlusion = meshBuilder.Occlusion;
mesh.colors32 = Enumerable.Range(0, meshBuilder.Colors.Length)
.Select(i => AmbientOcclusion.CombineColorOcclusion(colors[i], occlusion[i]))
.Select(c => new Color32(c.R, c.G, c.B, c.A)).ToArray();
// Set mesh filter mesh
var meshFilter = go.GetComponent <MeshFilter>();
if (meshFilter == null)
{
meshFilter = go.AddComponent <MeshFilter>();
}
meshFilter.sharedMesh = mesh;
// Set mesh render material
var meshRenderer = go.GetComponent <MeshRenderer>();
if (meshRenderer == null)
{
meshRenderer = go.AddComponent <MeshRenderer>();
}
meshRenderer.sharedMaterial = Resources.Load <Material>(settings.FloorShadow ? "StandardTransparent" : "Standard");
}