Wall damage shader testing (WIP)

Subsurface/Barotrauma.csproj

@@ -496,6 +496,7 @@
     <Content Include="Content\Characters\Watcher\watcher.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="Content\damageshader.fx" />
     <Content Include="Content\InfoTexts.xml">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <SubType>Designer</SubType>
@@ -803,6 +804,9 @@
     <Content Include="Content\Map\structures2.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="Content\Map\walldamage.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="Content\Map\waypointIcons.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
@@ -1105,6 +1109,9 @@
     <None Include="Content\Content.mgcb">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Include="Content\damageshader.xnb">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <None Include="Content\effects.mgfx">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>

Subsurface/Content/Content.mgcb

@@ -43,3 +43,9 @@
 /processorParam:DebugMode=Auto
 /build:blurshader.fx
 
+#begin damageshader.fx
+/importer:EffectImporter
+/processor:EffectProcessor
+/processorParam:DebugMode=Auto
+/build:damageshader.fx
+

Subsurface/Content/damageshader.fx

@@ -0,0 +1,34 @@
+
+Texture xTexture;
+sampler TextureSampler : register (s0) = sampler_state { Texture = <xTexture>; };
+
+Texture xStencil;
+sampler StencilSampler = sampler_state { Texture = <xStencil>; };
+
+
+float cutoff;
+float multiplier;
+
+float4 main(float4 position : SV_Position, float4 color : COLOR0, float2 texCoord : TEXCOORD0) : COLOR0
+{
+	float4 c = tex2D(TextureSampler, texCoord);
+
+	float4 stencilColor = tex2D(StencilSampler, texCoord);
+
+	float a = stencilColor.a - cutoff;
+
+	clip(a);
+
+	a = min(a * multiplier, 1.0f);
+	c = lerp(c, stencilColor, 1.0f - a);
+
+	return c * a;
+}
+
+technique StencilShader
+{
+    pass Pass1
+    {
+        PixelShader = compile ps_4_0_level_9_3 main();
+    }
+}

Subsurface/Source/Map/Structure.cs

@@ -370,6 +370,13 @@ namespace Barotrauma
 
 
         public override void Draw(SpriteBatch spriteBatch, bool editing, bool back = true)
+        {
+            Draw(spriteBatch, editing, back, null);
+        }
+
+        private static float prevCutoff;
+
+        public void Draw(SpriteBatch spriteBatch, bool editing, bool back = true, Effect damageEffect = null)
         {
             if (prefab.sprite == null) return;
 
@@ -382,14 +389,32 @@ namespace Barotrauma
             }
 
             Vector2 drawOffset = Submarine == null ? Vector2.Zero : Submarine.DrawPosition;
-            if(sections.Length == 1)
-                prefab.sprite.DrawTiled(spriteBatch, new Vector2(rect.X + drawOffset.X, -(rect.Y + drawOffset.Y)), new Vector2(rect.Width, rect.Height), Vector2.Zero, color,Point.Zero);
+            if (sections.Length == 1)
+            {
+                prefab.sprite.DrawTiled(spriteBatch, new Vector2(rect.X + drawOffset.X, -(rect.Y + drawOffset.Y)), new Vector2(rect.Width, rect.Height), Vector2.Zero, color, Point.Zero);
+                return;
+            }
 
             foreach (WallSection s in sections)
             {
+                if (damageEffect != null)
+                {
+                    float newCutoff =  Math.Min((s.damage / prefab.MaxHealth)*0.5f - 0.2f, 0.1f);
+
+                    if (Math.Abs(newCutoff - prevCutoff) > 0.01f)
+                    {
+                        damageEffect.Parameters["cutoff"].SetValue(newCutoff);
+
+                        damageEffect.CurrentTechnique.Passes[0].Apply();
+
+                        prevCutoff = newCutoff;
+                    }
+                }
+
                 Point offset = new Point(Math.Abs(rect.Location.X - s.rect.Location.X), Math.Abs(rect.Location.Y - s.rect.Location.Y));
-                if (sections.Length != 1 && s.damage < prefab.MaxHealth)
-                   prefab.sprite.DrawTiled(spriteBatch, new Vector2(s.rect.X + drawOffset.X, -(s.rect.Y + drawOffset.Y)), new Vector2(s.rect.Width, s.rect.Height), Vector2.Zero, color, offset);
+                if (sections.Length != 1)
+                    prefab.sprite.DrawTiled(spriteBatch, new Vector2(s.rect.X + drawOffset.X, -(s.rect.Y + drawOffset.Y)), new Vector2(s.rect.Width, s.rect.Height), Vector2.Zero, color, offset);
+
 
                 if (s.isHighLighted)
                 {
@@ -399,12 +424,12 @@ namespace Barotrauma
                 }
 
                 s.isHighLighted = false;
-                
-                if (s.damage < 0.01f) continue;
 
-                 GUI.DrawRectangle(spriteBatch,
-                    new Vector2(s.rect.X + drawOffset.X, -(s.rect.Y + drawOffset.Y)), new Vector2(s.rect.Width, s.rect.Height),
-                     Color.Black * (s.damage / prefab.MaxHealth), true); 
+                //if (s.damage < 0.01f) continue;
+
+                //GUI.DrawRectangle(spriteBatch,
+                //   new Vector2(s.rect.X + drawOffset.X, -(s.rect.Y + drawOffset.Y)), new Vector2(s.rect.Width, s.rect.Height),
+                //    Color.Black * (s.damage / prefab.MaxHealth), true);
             }
             /*
             if(_convexHulls == null) return;

Subsurface/Source/Map/Submarine.cs

@@ -149,7 +149,7 @@ namespace Barotrauma
         {
             get
             {
-                return subBody.Position;
+                return subBody ==null ? Vector2.Zero : subBody.Position;
             }
         }
 
@@ -287,11 +287,25 @@ namespace Barotrauma
         {
             for (int i = 0; i < MapEntity.mapEntityList.Count; i++)
             {
+                if (MapEntity.mapEntityList[i] is Structure) continue;
                 if (MapEntity.mapEntityList[i].Sprite == null || MapEntity.mapEntityList[i].Sprite.Depth < 0.5f)
                     MapEntity.mapEntityList[i].Draw(spriteBatch, editing, false);
             }
         }
 
+        public static void DrawDamageable(SpriteBatch spriteBatch, Effect damageEffect, bool editing = false)
+        {
+            for (int i = 0; i < MapEntity.mapEntityList.Count; i++)
+            {
+                var structure = MapEntity.mapEntityList[i] as Structure;
+                if (structure == null || structure.Sprite.Depth > 0.5f) continue;
+
+                structure.Draw(spriteBatch, editing, false, damageEffect);
+            }
+            damageEffect.Parameters["cutoff"].SetValue(0.5f);
+        }
+
+
         public static void DrawBack(SpriteBatch spriteBatch, bool editing = false)
         {
             for (int i = 0; i < MapEntity.mapEntityList.Count; i++)

Subsurface/Source/Screens/GameScreen.cs

@@ -18,6 +18,10 @@ namespace Barotrauma
 
         private BlurEffect lightBlur;
 
+        private Effect damageEffect;
+
+        private Texture2D damageStencil;
+
         public BackgroundCreatureManager BackgroundCreatureManager;
 
         public Camera Cam
@@ -46,6 +50,13 @@ namespace Barotrauma
             var blurEffect = content.Load<Effect>("blurshader");
 #endif
 
+            damageStencil = TextureLoader.FromFile("Content/Map/walldamage.png");
+
+            damageEffect = content.Load<Effect>("damageshader");
+           // damageEffect.Parameters["cutoff"].SetValue(0.5f);
+            damageEffect.Parameters["xStencil"].SetValue(damageStencil);
+
+
 
             lightBlur = new BlurEffect(blurEffect, 0.001f, 0.001f);
 
@@ -160,7 +171,10 @@ namespace Barotrauma
 
         public override void Draw(double deltaTime, GraphicsDevice graphics, SpriteBatch spriteBatch)
         {
-            cam.UpdateTransform(true); 
+            cam.UpdateTransform(true);
+
+
+            //damageStencil = TextureLoader.FromFile("Content/Map/background.png");
             
             DrawMap(graphics, spriteBatch);
 
@@ -324,6 +338,19 @@ namespace Barotrauma
             Submarine.DrawFront(spriteBatch);
                         
             spriteBatch.End();
+            
+            spriteBatch.Begin(SpriteSortMode.Immediate,
+                BlendState.AlphaBlend, SamplerState.LinearWrap,
+                null, null, 
+                damageEffect,
+                cam.Transform);
+            damageEffect.Parameters["cutoff"].SetValue(-0.2f);
+            damageEffect.Parameters["multiplier"].SetValue(5.0f);
+
+            Submarine.DrawDamageable(spriteBatch, damageEffect);
+                        
+            spriteBatch.End();
+
 
             GameMain.LightManager.DrawLightMap(spriteBatch, cam, lightBlur.Effect);