Trash maze MVP (#79)

Co-authored-by: Michal Pikulski <michal@foolhardyhorizons.com> Co-authored-by: Michal Pikulski <michal.a.pikulski@gmail.com> Reviewed-on: #79
2025-12-10 11:14:10 +00:00
parent 4f8c8ff563
commit 082ce98f79
58 changed files with 4624 additions and 1502 deletions
--- a/Assets/Shaders/TrashMaze/ObjectVisibilityProgressive.shader
+++ b/Assets/Shaders/TrashMaze/ObjectVisibilityProgressive.shader
@@ -0,0 +1,106 @@
+Shader "TrashMaze/ObjectVisibilityProgressive"
+{
+    Properties
+    {
+        _MainTex ("Normal Texture (Color)", 2D) = "white" {}
+        _OutlineTex ("Outline Texture (White)", 2D) = "white" {}
+        _RevealMask ("Reveal Mask", 2D) = "black" {}
+        [PerRendererData] _IsInVision ("Is In Vision", Float) = 0
+    }
+
+    SubShader
+    {
+        Tags 
+        { 
+            "Queue"="Transparent" 
+            "RenderType"="Transparent"
+            "IgnoreProjector"="True"
+        }
+        
+        Blend SrcAlpha OneMinusSrcAlpha
+        ZWrite Off
+        Cull Off
+        
+        Pass
+        {
+            HLSLPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+            
+            struct Attributes
+            {
+                float4 positionOS : POSITION;
+                float2 uv : TEXCOORD0;
+            };
+            
+            struct Varyings
+            {
+                float2 uv : TEXCOORD0;
+                float4 positionCS : SV_POSITION;
+                float3 positionWS : TEXCOORD1;
+            };
+            
+            TEXTURE2D(_MainTex);
+            SAMPLER(sampler_MainTex);
+            TEXTURE2D(_OutlineTex);
+            SAMPLER(sampler_OutlineTex);
+            TEXTURE2D(_RevealMask);
+            SAMPLER(sampler_RevealMask);
+            float4 _MainTex_ST;
+            
+            // Global shader properties (set by PulverController)
+            float2 _PlayerWorldPos;
+            float _VisionRadius;
+            
+            Varyings vert(Attributes input)
+            {
+                Varyings output;
+                VertexPositionInputs vertexInput = GetVertexPositionInputs(input.positionOS.xyz);
+                output.positionCS = vertexInput.positionCS;
+                output.positionWS = vertexInput.positionWS;
+                output.uv = TRANSFORM_TEX(input.uv, _MainTex);
+                return output;
+            }
+            
+            half4 frag(Varyings input) : SV_Target
+            {
+                // Sample reveal mask (0 = not revealed, 1 = revealed)
+                float revealAmount = SAMPLE_TEXTURE2D(_RevealMask, sampler_RevealMask, input.uv).r;
+                
+                // Binary decision: is this pixel revealed?
+                bool isRevealed = revealAmount > 0.5;
+                
+                // If pixel was never revealed, hide it completely
+                if (!isRevealed)
+                {
+                    return half4(0, 0, 0, 0);
+                }
+                
+                // Calculate per-pixel distance to player in world space
+                float2 pixelWorldPos = input.positionWS.xy;
+                float distanceToPlayer = distance(pixelWorldPos, _PlayerWorldPos);
+                
+                // Three-state logic per pixel:
+                // 1. Never revealed -> hide (handled above)
+                // 2. Revealed + currently in player vision radius -> show color
+                // 3. Revealed + outside player vision radius -> show outline
+                
+                if (distanceToPlayer < _VisionRadius)
+                {
+                    // Pixel is revealed AND currently in vision - show color
+                    return SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, input.uv);
+                }
+                else
+                {
+                    // Pixel is revealed but NOT currently in vision - show outline
+                    return SAMPLE_TEXTURE2D(_OutlineTex, sampler_OutlineTex, input.uv);
+                }
+            }
+            ENDHLSL
+        }
+    }
+    
+    FallBack "Transparent/Diffuse"
+}
+