Add core voxel rendering code.

2013-02-23 00:56:24 +13:00
parent 6cef4290df
commit a00696ec3b
12 changed files with 701 additions and 0 deletions
--- a/OpenRA.Game/Graphics/VoxelRenderer.cs
+++ b/OpenRA.Game/Graphics/VoxelRenderer.cs
@@ -0,0 +1,88 @@
+#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;
+using OpenRA.FileFormats;
+using OpenRA.FileFormats.Graphics;
+
+namespace OpenRA.Graphics
+{
+	public class VoxelRenderer
+	{
+		Renderer renderer;
+		IShader shader;
+		IShader shadowShader;
+
+		public VoxelRenderer(Renderer renderer, IShader shader, IShader shadowShader)
+		{
+			this.renderer = renderer;
+			this.shader = shader;
+			this.shadowShader = shadowShader;
+		}
+
+		public void Render(VoxelLoader loader, VoxelRenderData renderData,
+		                   float[] t, float[] lightDirection,
+		                   float[] ambientLight, float[] diffuseLight,
+		                   int colorPalette, int normalsPalette)
+		{
+			shader.SetTexture("DiffuseTexture", renderData.Sheet.Texture);
+			shader.SetVec("PaletteRows", (colorPalette + 0.5f) / HardwarePalette.MaxPalettes,
+			                             (normalsPalette + 0.5f) / HardwarePalette.MaxPalettes);
+			shader.SetMatrix("TransformMatrix", t);
+			shader.SetVec("LightDirection", lightDirection, 4);
+			shader.SetVec("AmbientLight", ambientLight, 3);
+			shader.SetVec("DiffuseLight", diffuseLight, 3);
+			shader.Render(() => renderer.DrawBatch(loader.VertexBuffer, renderData.Start, renderData.Count, PrimitiveType.QuadList));
+		}
+
+		public void RenderShadow(VoxelLoader loader, VoxelRenderData renderData,
+		                   float[] t, float[] lightDirection, float[] groundNormal, float groundZ, int colorPalette)
+		{
+			shadowShader.SetTexture("DiffuseTexture", renderData.Sheet.Texture);
+			shadowShader.SetVec("PaletteRows", (colorPalette + 0.5f) / HardwarePalette.MaxPalettes, 0);
+			shadowShader.SetMatrix("TransformMatrix", t);
+			shadowShader.SetVec("LightDirection", lightDirection, 4);
+			shadowShader.SetVec("GroundNormal", groundNormal, 3);
+			shadowShader.SetVec("GroundZ", groundZ);
+			shadowShader.Render(() => renderer.DrawBatch(loader.VertexBuffer, renderData.Start, renderData.Count, PrimitiveType.QuadList));
+		}
+
+		public void SetPalette(ITexture palette)
+		{
+			shader.SetTexture("Palette", palette);
+			shadowShader.SetTexture("Palette", palette);
+		}
+
+		public void SetViewportParams(Size screen, float zoom, float2 scroll)
+		{
+			// Construct projection matrix
+			// Clip planes are set at -height and +2*height
+
+			var tiw = 2*zoom / screen.Width;
+			var tih = 2*zoom / screen.Height;
+			var view = new float[]
+			{
+				tiw, 0, 0, 0,
+				0, -tih, 0, 0,
+				0, 0, -tih/3, 0,
+				-1 - tiw*scroll.X,
+				1 + tih*scroll.Y,
+				1 + tih*scroll.Y/3,
+				1
+			};
+
+			shader.SetMatrix("View", view);
+			shadowShader.SetMatrix("View", view);
+		}
+	}
+}