From e10bffde9b326d2dd007fb802d60b28e8e5c0a53 Mon Sep 17 00:00:00 2001
From: Regalis <regalis@undertowgames.com>
Date: Sat, 19 Dec 2015 16:02:05 +0200
Subject: [PATCH] Light rendering optimization

---
 Subsurface/Source/Camera.cs                   |   2 --
 .../Source/Items/Components/Machines/Radar.cs |  11 +++++--
 Subsurface/Source/Map/Levels/LevelRenderer.cs |   7 +++++
 Subsurface/Source/Map/Lights/ConvexHull.cs    |  29 ++++++++++++------
 Subsurface/Source/Map/Lights/LightManager.cs  |  16 ++++++++++
 Subsurface_Solution.v12.suo                   | Bin 802816 -> 802816 bytes
 6 files changed, 52 insertions(+), 13 deletions(-)

diff --git a/Subsurface/Source/Camera.cs b/Subsurface/Source/Camera.cs
index 2102d9cad..021093842 100644
--- a/Subsurface/Source/Camera.cs
+++ b/Subsurface/Source/Camera.cs
@@ -119,8 +119,6 @@ namespace Barotrauma
             get { return targetPos; }
             set { 
                 targetPos = value;
-                System.Diagnostics.Debug.WriteLine(value);
-
             }
         }
                 
diff --git a/Subsurface/Source/Items/Components/Machines/Radar.cs b/Subsurface/Source/Items/Components/Machines/Radar.cs
index d84544a22..78b0b2a7a 100644
--- a/Subsurface/Source/Items/Components/Machines/Radar.cs
+++ b/Subsurface/Source/Items/Components/Machines/Radar.cs
@@ -198,8 +198,15 @@ namespace Barotrauma.Items.Components
                     if (pointDist > radius) continue;
                     if (pointDist > prevPingRadius && pointDist < pingRadius)
                     {
-                        var blip = new RadarBlip(limb.WorldPosition, 1.0f);
-                        radarBlips.Add(blip);
+                        float limbSize = limb.Mass;
+
+                        for (int i = 0; i<=limb.Mass/100.0f; i++)
+                        {
+                            var blip = new RadarBlip(limb.WorldPosition+Rand.Vector(limb.Mass/10.0f), 1.0f);
+                            radarBlips.Add(blip);
+                        }
+
+
                     }
                 }
             }
diff --git a/Subsurface/Source/Map/Levels/LevelRenderer.cs b/Subsurface/Source/Map/Levels/LevelRenderer.cs
index 05ee49509..0e172816a 100644
--- a/Subsurface/Source/Map/Levels/LevelRenderer.cs
+++ b/Subsurface/Source/Map/Levels/LevelRenderer.cs
@@ -151,6 +151,9 @@ namespace Barotrauma
         {
             if (WallVertices == null || WallVertices.Length <= 0) return;
 
+            Stopwatch sw = new Stopwatch();
+            sw.Start();
+
             basicEffect.World = cam.ShaderTransform
                 * Matrix.CreateOrthographic(GameMain.GraphicsWidth, GameMain.GraphicsHeight, -1, 1) * 0.5f;
 
@@ -194,6 +197,10 @@ namespace Barotrauma
 
                 }
             }
+
+            sw.Stop();
+
+            Debug.WriteLine("level render: "+sw.ElapsedTicks);
         }
 
     }
diff --git a/Subsurface/Source/Map/Lights/ConvexHull.cs b/Subsurface/Source/Map/Lights/ConvexHull.cs
index fe5db85c5..47777e927 100644
--- a/Subsurface/Source/Map/Lights/ConvexHull.cs
+++ b/Subsurface/Source/Map/Lights/ConvexHull.cs
@@ -1,6 +1,7 @@
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 
 namespace Barotrauma.Lights
@@ -38,6 +39,8 @@ namespace Barotrauma.Lights
         private VertexPositionColor[] shadowVertices;
         private VertexPositionTexture[] penumbraVertices;
 
+        int shadowVertexCount;
+
         private Entity parentEntity;
 
         private Rectangle boundingBox;
@@ -73,6 +76,10 @@ namespace Barotrauma.Lights
 
             cachedShadows = new Dictionary<LightSource, CachedShadow>();
             
+            shadowVertices = new VertexPositionColor[6 * 2];
+            penumbraVertices = new VertexPositionTexture[6];
+
+            
             vertices = points;
             primitiveCount = vertices.Length;
 
@@ -139,6 +146,8 @@ namespace Barotrauma.Lights
 
         private void CalculateShadowVertices(Vector2 lightSourcePos, bool los = true)
         {
+            shadowVertexCount = 0;
+
             //compute facing of each edge, using N*L
             for (int i = 0; i < primitiveCount; i++)
             {
@@ -172,15 +181,13 @@ namespace Barotrauma.Lights
                     startingIndex = nextEdge;
             }
 
-            int shadowVertexCount;
-
             //nr of vertices that are in the shadow
             if (endingIndex > startingIndex)
                 shadowVertexCount = endingIndex - startingIndex + 1;
             else
                 shadowVertexCount = primitiveCount + 1 - startingIndex + endingIndex;
 
-            shadowVertices = new VertexPositionColor[shadowVertexCount * 2];
+            //shadowVertices = new VertexPositionColor[shadowVertexCount * 2];
 
             //create a triangle strip that has the shape of the shadow
             int currentIndex = startingIndex;
@@ -213,8 +220,6 @@ namespace Barotrauma.Lights
 
         private void CalculatePenumbraVertices(int startingIndex, int endingIndex, Vector2 lightSourcePos, bool los)
         {
-            penumbraVertices = new VertexPositionTexture[6];
-
             for (int n = 0; n < 4; n += 3)
             {
                 Vector3 penumbraStart = new Vector3((n == 0) ? vertices[startingIndex] : vertices[endingIndex], 0.0f);
@@ -309,18 +314,23 @@ namespace Barotrauma.Lights
         private void DrawShadows(GraphicsDevice graphicsDevice, Camera cam, Matrix transform, bool los = true)
         {
 
+
             Vector3 offset = Vector3.Zero;
             if (parentEntity != null && parentEntity.Submarine != null)
             {
                 offset = new Vector3(parentEntity.Submarine.DrawPosition.X, parentEntity.Submarine.DrawPosition.Y, 0.0f);
             }
             
+            if (shadowVertexCount>0)
+            {
+                shadowEffect.World = Matrix.CreateTranslation(offset) * transform;
+                shadowEffect.CurrentTechnique.Passes[0].Apply();
 
-            shadowEffect.World = Matrix.CreateTranslation(offset) * transform;
-            shadowEffect.CurrentTechnique.Passes[0].Apply();
-
-            graphicsDevice.DrawUserPrimitives(PrimitiveType.TriangleStrip, shadowVertices, 0, shadowVertices.Length - 2);
+                graphicsDevice.DrawUserPrimitives(PrimitiveType.TriangleStrip, shadowVertices, 0, shadowVertexCount*2 - 2);
             
+            }
+
+
             if (los)
             {
                 penumbraEffect.World = shadowEffect.World;
@@ -330,6 +340,7 @@ namespace Barotrauma.Lights
                 graphicsDevice.DrawUserPrimitives(PrimitiveType.TriangleList, penumbraVertices, 0, 2, VertexPositionTexture.VertexDeclaration);
 #endif
             }
+
         }
 
         public void Remove()
diff --git a/Subsurface/Source/Map/Lights/LightManager.cs b/Subsurface/Source/Map/Lights/LightManager.cs
index f8e5d554d..5dd00f0ce 100644
--- a/Subsurface/Source/Map/Lights/LightManager.cs
+++ b/Subsurface/Source/Map/Lights/LightManager.cs
@@ -60,6 +60,10 @@ namespace Barotrauma.Lights
 
         public void DrawLOS(GraphicsDevice graphics, SpriteBatch spriteBatch, Camera cam, Vector2 pos)
         {
+
+            Stopwatch sw = new Stopwatch();
+            sw.Start();
+
             if (!LosEnabled) return;
 
             Rectangle camView = new Rectangle(cam.WorldView.X, cam.WorldView.Y - cam.WorldView.Height, cam.WorldView.Width, cam.WorldView.Height);
@@ -75,6 +79,9 @@ namespace Barotrauma.Lights
                 convexHull.DrawShadows(graphics, cam, pos, shadowTransform);
             }
 
+            sw.Stop();
+
+            Debug.WriteLine("drawlos: " + sw.ElapsedTicks + " (" + sw.ElapsedMilliseconds + ")");
             if (!ObstructVision) return;
 
             spriteBatch.Begin(SpriteSortMode.Deferred, CustomBlendStates.Multiplicative);
@@ -82,6 +89,7 @@ namespace Barotrauma.Lights
             spriteBatch.End();
 
             ObstructVision = false;
+
         }
 
         public void OnMapLoaded()
@@ -94,6 +102,10 @@ namespace Barotrauma.Lights
 
         public void UpdateLightMap(GraphicsDevice graphics, SpriteBatch spriteBatch, Camera cam)
         {
+
+            Stopwatch sw = new Stopwatch();
+            sw.Start();
+
             if (!LightingEnabled) return;
 
             Matrix shadowTransform = cam.ShaderTransform
@@ -152,6 +164,10 @@ namespace Barotrauma.Lights
             graphics.SetRenderTarget(null);
 
 
+            Debug.WriteLine("lights: " + sw.ElapsedTicks + " (" + sw.ElapsedMilliseconds + ")");
+            if (!ObstructVision) return;
+
+
         }
 
         public void UpdateObstructVision(GraphicsDevice graphics, SpriteBatch spriteBatch, Camera cam, Vector2 lookAtPosition)
diff --git a/Subsurface_Solution.v12.suo b/Subsurface_Solution.v12.suo
index 3ef76c980a7e0e26ff6560004dfbee9a661a0803..2539b262f75bba33b63e6cd39f217ed100ed1a66 100644
GIT binary patch
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