Add VoxelRenderable to integrate voxel drawing with render traits.

OpenRA.Game/Graphics/VoxelRenderable.cs

@@ -0,0 +1,106 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2013 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+
+namespace OpenRA.Graphics
+{
+	public struct VoxelRenderable : IRenderable
+	{
+		readonly IEnumerable<VoxelAnimation> voxels;
+		readonly WPos pos;
+		readonly int zOffset;
+		readonly WRot camera;
+		readonly WRot lightSource;
+		readonly float[] lightAmbientColor;
+		readonly float[] lightDiffuseColor;
+		readonly PaletteReference palette;
+		readonly PaletteReference normalsPalette;
+		readonly PaletteReference shadowPalette;
+		readonly float scale;
+
+		public VoxelRenderable(IEnumerable<VoxelAnimation> voxels, WPos pos, int zOffset, WRot camera, float scale,
+		                       WRot lightSource, float[] lightAmbientColor, float[] lightDiffuseColor,
+		                       PaletteReference color, PaletteReference normals, PaletteReference shadow)
+		{
+			this.voxels = voxels;
+			this.pos = pos;
+			this.zOffset = zOffset;
+			this.scale = scale;
+			this.camera = camera;
+			this.lightSource = lightSource;
+			this.lightAmbientColor = lightAmbientColor;
+			this.lightDiffuseColor = lightDiffuseColor;
+			this.palette = color;
+			this.normalsPalette = normals;
+			this.shadowPalette = shadow;
+		}
+
+		public WPos Pos { get { return pos; } }
+		public float Scale { get { return scale; } }
+		public PaletteReference Palette { get { return palette; } }
+		public int ZOffset { get { return zOffset; } }
+
+		public IRenderable WithScale(float newScale)
+		{
+			return new VoxelRenderable(voxels, pos, zOffset, camera, newScale,
+			                           lightSource, lightAmbientColor, lightDiffuseColor,
+			                           palette, normalsPalette, shadowPalette);
+		}
+
+		public IRenderable WithPalette(PaletteReference newPalette)
+		{
+			return new VoxelRenderable(voxels, pos, zOffset, camera, scale,
+			                           lightSource, lightAmbientColor, lightDiffuseColor,
+			                           newPalette, normalsPalette, shadowPalette);
+		}
+
+		public IRenderable WithZOffset(int newOffset)
+		{
+			return new VoxelRenderable(voxels, pos, newOffset, camera, scale,
+			                           lightSource, lightAmbientColor, lightDiffuseColor,
+			                           palette, normalsPalette, shadowPalette);
+		}
+
+		public IRenderable WithPos(WPos newPos)
+		{
+			return new VoxelRenderable(voxels, newPos, zOffset, camera, scale,
+			                           lightSource, lightAmbientColor, lightDiffuseColor,
+			                           palette, normalsPalette, shadowPalette);
+		}
+
+		public void Render(WorldRenderer wr)
+		{
+			// Depth and shadow buffers are cleared between actors so that
+			// overlapping units and shadows behave like overlapping sprites.
+			var vr = Game.Renderer.WorldVoxelRenderer;
+			var draw = voxels.Where(v => v.DisableFunc == null || !v.DisableFunc());
+
+			foreach (var v in draw)
+				v.Voxel.PrepareForDraw(wr, pos + v.OffsetFunc(), v.RotationFunc(), camera,
+				                       v.FrameFunc(), scale, lightSource);
+
+			Game.Renderer.EnableDepthBuffer();
+			Game.Renderer.EnableStencilBuffer();
+			foreach (var v in draw)
+				v.Voxel.DrawShadow(vr, shadowPalette.Index);
+			Game.Renderer.DisableStencilBuffer();
+			Game.Renderer.DisableDepthBuffer();
+
+			Game.Renderer.EnableDepthBuffer();
+			foreach (var v in draw)
+				v.Voxel.Draw(vr, lightAmbientColor, lightDiffuseColor, palette.Index, normalsPalette.Index);
+			Game.Renderer.DisableDepthBuffer();
+		}
+	}
+}