Implement sonic blast rendering effect.

OpenRA.Mods.D2k/Graphics/SonicBlastRenderable.cs

@@ -0,0 +1,65 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using OpenRA.Graphics;
+using OpenRA.Mods.D2k.Traits;
+using OpenRA.Primitives;
+
+namespace OpenRA.Mods.D2k.Graphics
+{
+	public class SonicBlastRenderable : IRenderable, IFinalizedRenderable
+	{
+		public static readonly IEnumerable<IRenderable> None = Array.Empty<IRenderable>();
+		readonly SonicBlastRenderer renderer;
+		readonly float3 r;
+
+		public WPos Pos { get; }
+		public int ZOffset => 0;
+
+		public SonicBlastRenderable(SonicBlastRenderer renderer, WPos pos)
+		{
+			this.renderer = renderer;
+			Pos = pos;
+			r = renderer.Info.Size * new float3(0.5f, 0.5f, 0);
+		}
+
+		public bool IsDecoration => false;
+
+		public IRenderable WithZOffset(int newOffset) => this;
+		public IRenderable OffsetBy(in WVec offset) => this;
+		public IRenderable AsDecoration() => this;
+
+		public IFinalizedRenderable PrepareRender(WorldRenderer wr) { return this; }
+
+		public void Render(WorldRenderer wr)
+		{
+			renderer.Draw(wr.Screen3DPxPosition(Pos));
+		}
+
+		public void RenderDebugGeometry(WorldRenderer wr)
+		{
+			var pos = wr.Screen3DPxPosition(Pos);
+			var tl = wr.Viewport.WorldToViewPx(pos - r);
+			var br = wr.Viewport.WorldToViewPx(pos + r);
+			Game.Renderer.RgbaColorRenderer.DrawRect(tl, br, 1, Color.Red);
+		}
+
+		public Rectangle ScreenBounds(WorldRenderer wr)
+		{
+			var pos = wr.Screen3DPxPosition(Pos);
+			var tl = wr.Viewport.WorldToViewPx(pos - r);
+			var br = wr.Viewport.WorldToViewPx(pos + r);
+			return new Rectangle(tl.X, tl.Y, br.X - tl.X, br.Y - tl.Y);
+		}
+	}
+}

OpenRA.Mods.D2k/Projectiles/SonicBlast.cs

@@ -14,9 +14,9 @@ using System.Linq;
 using OpenRA.GameRules;
 using OpenRA.Graphics;
 using OpenRA.Mods.Common;
-using OpenRA.Mods.Common.Graphics;
 using OpenRA.Mods.Common.Traits;
-using OpenRA.Primitives;
+using OpenRA.Mods.D2k.Graphics;
+using OpenRA.Mods.D2k.Traits;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.D2k.Projectiles
@@ -30,9 +30,6 @@ namespace OpenRA.Mods.D2k.Projectiles
 		[Desc("The number of ticks between the blast causing warhead impacts in its area of effect.")]
 		public readonly int DamageInterval = 1;
 
-		[Desc("Equivalent to sequence ZOffset. Controls Z sorting.")]
-		public readonly int ZOffset = 0;
-
 		[Desc("The minimum distance the blast travels.")]
 		public readonly WDist MinDistance = WDist.Zero;
 
@@ -57,9 +54,6 @@ namespace OpenRA.Mods.D2k.Projectiles
 		[Desc("Can this projectile be blocked when hitting actors with an nameof(BlocksProjectiles) trait.")]
 		public readonly bool Blockable = false;
 
-		[Desc("Color of the blast.")]
-		public readonly Color Color = Color.SkyBlue;
-
 		public IProjectile Create(ProjectileArgs args)
 		{
 			return new SonicBlast(this, args);
@@ -72,6 +66,7 @@ namespace OpenRA.Mods.D2k.Projectiles
 		readonly ProjectileArgs args;
 
 		readonly WDist speed;
+		readonly SonicBlastRenderer renderer;
 
 		[Sync]
 		WPos pos, lastPos;
@@ -85,6 +80,8 @@ namespace OpenRA.Mods.D2k.Projectiles
 			this.info = info;
 			this.args = args;
 			var world = args.SourceActor.World;
+			renderer = world.WorldActor.Trait<SonicBlastRenderer>();
+
 			if (info.Speed.Length > 1)
 				speed = new WDist(world.SharedRandom.Next(info.Speed[0].Length, info.Speed[1].Length));
 			else
@@ -151,10 +148,7 @@ namespace OpenRA.Mods.D2k.Projectiles
 		public IEnumerable<IRenderable> Render(WorldRenderer wr)
 		{
 			if (!wr.World.FogObscures(pos))
-			{
+				return new[] { (IRenderable)new SonicBlastRenderable(renderer, pos) };
-				var blastRender = new BeamRenderable(pos, info.ZOffset, lastPos - pos, BeamRenderableShape.Cylindrical, info.Width, info.Color);
-				return new[] { (IRenderable)blastRender };
-			}
 
 			return SpriteRenderable.None;
 		}

OpenRA.Mods.D2k/Traits/World/SonicBlastRenderer.cs

@@ -0,0 +1,96 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.D2k.Traits
+{
+	[TraitLocation(SystemActors.World | SystemActors.EditorWorld)]
+	[Desc("Renders sonic blasts")]
+	public class SonicBlastRendererInfo : TraitInfo
+	{
+		[Desc("Diameter of the sonic effect circle.")]
+		public readonly int Size = 16;
+
+		[Desc("Amount to scale the visuals within the effect circle.")]
+		public readonly float Zoom = 2.5f;
+
+		public override object Create(ActorInitializer init) { return new SonicBlastRenderer(this); }
+	}
+
+	public sealed class SonicBlastRenderer : IRenderPostProcessPass, INotifyActorDisposing
+	{
+		public readonly SonicBlastRendererInfo Info;
+
+		readonly Renderer renderer;
+		readonly IShader shader;
+		readonly IVertexBuffer<RenderPostProcessPassTexturedVertex> buffer;
+		readonly List<float3> positions = new();
+
+		public SonicBlastRenderer(SonicBlastRendererInfo info)
+		{
+			Info = info;
+			renderer = Game.Renderer;
+			shader = renderer.CreateShader(new RenderPostProcessPassTexturedShaderBindings("sonic"));
+			buffer = renderer.CreateVertexBuffer<RenderPostProcessPassTexturedVertex>(6);
+
+			var r = 0.5f * info.Size;
+			shader.SetVec("Scale", r * (1f / info.Zoom - 1));
+			var vertices = new RenderPostProcessPassTexturedVertex[]
+			{
+				new(-r, -r, -1, -1),
+				new(r, -r, 1, -1),
+				new(r, r, 1, 1),
+				new(r, r, 1, 1),
+				new(-r, r, -1, 1),
+				new(-r, -r, -1, -1)
+			};
+
+			buffer.SetData(ref vertices, 6);
+		}
+
+		public void Draw(float3 pos)
+		{
+			positions.Add(pos);
+		}
+
+		PostProcessPassType IRenderPostProcessPass.Type => PostProcessPassType.AfterWorld;
+		bool IRenderPostProcessPass.Enabled => positions.Count > 0;
+
+		void IRenderPostProcessPass.Draw(WorldRenderer wr)
+		{
+			var scroll = wr.Viewport.TopLeft;
+			var size = renderer.WorldFrameBufferSize;
+			var width = 2f / (renderer.WorldDownscaleFactor * size.Width);
+			var height = 2f / (renderer.WorldDownscaleFactor * size.Height);
+
+			shader.SetVec("Scroll", scroll.X, scroll.Y);
+			shader.SetVec("p1", width, height);
+			shader.SetVec("p2", -1, -1);
+			shader.SetTexture("WorldTexture", Game.Renderer.WorldBufferSnapshot());
+			shader.PrepareRender();
+			foreach (var pos in positions)
+			{
+				shader.SetVec("Pos", pos.X, pos.Y);
+				renderer.DrawBatch(buffer, shader, 0, 6, PrimitiveType.TriangleList);
+			}
+
+			positions.Clear();
+		}
+
+		void INotifyActorDisposing.Disposing(Actor self)
+		{
+			buffer.Dispose();
+		}
+	}
+}

glsl/postprocess_textured_sonic.frag

@@ -0,0 +1,18 @@
+#version {VERSION}
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform sampler2D WorldTexture;
+uniform float Scale;
+
+in vec2 vTexCoord;
+out vec4 fragColor;
+
+void main()
+{
+    if (dot(vTexCoord, vTexCoord) >= 1.0)
+	    discard;
+
+	fragColor = texelFetch(WorldTexture, ivec2(gl_FragCoord.xy + Scale * vTexCoord), 0);
+}

mods/d2k/rules/world.yaml

@@ -11,6 +11,7 @@
 	TerrainGeometryOverlay:
 	DebugVisualizations:
 	TerrainRenderer:
+	SonicBlastRenderer:
 	ShroudRenderer:
 		ShroudVariants: shrouda, shroudb, shroudc, shroudd
 		FogVariants: foga, fogb, fogc, fogd

mods/d2k/weapons/other.yaml

@@ -10,7 +10,6 @@ Sound:
 		Falloff: 0, 0, 100, 0
 		Range: 0, 0c512, 4c0, 6c0
 		MinDistance: 5c0
-		Color: 00FFFFC8
 	Warhead@1Dam: SpreadDamage
 		Falloff: 100, 0
 		Spread: 1c756