Interactable Entities

2026-10-12 21:06:46 +03:00
1 parent efb5e1c2e8
commit e05cf28266
@@ -0,0 +1,90 @@
+Shader "Custom/HexGridSimple"
+{
+    Properties
+    {
+        _BaseColor  ("Base Color (alpha 0 = прозрачный)", Color) = (0,0,0,0)
+        _LineColor  ("Line Color", Color) = (1,1,1,1)
+        _CellSize   ("Cell Size (радиус шестигранника)", Float) = 1
+        _LineWidth  ("Line Width (доля от размера клетки)", Range(0.001, 0.5)) = 0.05
+        _GridOrigin ("Grid Origin (XZ)", Vector) = (0,0,0,0)
+    }
+    SubShader
+    {
+        Tags { "RenderType"="Transparent" "Queue"="Transparent" "RenderPipeline"="UniversalPipeline" }
+
+        Pass
+        {
+            Name "HexGrid"
+            Tags { "LightMode"="UniversalForward" }
+            Blend One OneMinusSrcAlpha      // premultiplied alpha
+            ZWrite Off
+            Cull Off
+
+            HLSLPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+
+            CBUFFER_START(UnityPerMaterial)
+                half4  _BaseColor;
+                half4  _LineColor;
+                float  _CellSize;
+                float  _LineWidth;
+                float4 _GridOrigin;
+            CBUFFER_END
+
+            struct Attributes { float4 positionOS : POSITION; };
+            struct Varyings   { float4 positionCS : SV_POSITION; float3 positionWS : TEXCOORD0; };
+
+            Varyings vert(Attributes IN)
+            {
+                Varyings OUT;
+                OUT.positionWS = TransformObjectToWorld(IN.positionOS.xyz);
+                OUT.positionCS = TransformWorldToHClip(OUT.positionWS);
+                return OUT;
+            }
+
+            static const float SQRT3 = 1.7320508;
+            static const float HALF_SQRT3 = 0.8660254;
+
+            // Центр шестигранника, содержащего точку p (pointy-top, R = радиус описанной окружности)
+            float2 HexCenter(float2 p, float R)
+            {
+                float q = (SQRT3 / 3.0 * p.x - 1.0 / 3.0 * p.y) / R;
+                float r = (2.0 / 3.0 * p.y) / R;
+                float3 c  = float3(q, -q - r, r);     // cube
+                float3 rc = round(c);
+                float3 d  = abs(rc - c);
+                if (d.x > d.y && d.x > d.z) rc.x = -rc.y - rc.z;
+                else if (d.y > d.z)         rc.y = -rc.x - rc.z;
+                else                        rc.z = -rc.x - rc.y;
+                return float2(R * SQRT3 * (rc.x + rc.z * 0.5), R * 1.5 * rc.z);
+            }
+
+            // Расстояние от точки (относительно центра) до ближайшего ребра
+            float HexEdgeDist(float2 d, float R)
+            {
+                float h = max(abs(d.x),
+                          max(abs( 0.5 * d.x + HALF_SQRT3 * d.y),
+                              abs(-0.5 * d.x + HALF_SQRT3 * d.y)));
+                return HALF_SQRT3 * R - h;
+            }
+
+            half4 frag(Varyings IN) : SV_Target
+            {
+                float2 p = IN.positionWS.xz - _GridOrigin.xy;
+                float2 c = HexCenter(p, _CellSize);
+                float  e = HexEdgeDist(p - c, _CellSize);
+
+                float t  = 0.5 * _LineWidth * _CellSize;   // половина толщины линии
+                float aa = fwidth(e);
+                float lineMask = 1.0 - smoothstep(t - aa, t + aa, e);
+
+                half4 b = half4(_BaseColor.rgb * _BaseColor.a, _BaseColor.a);
+                half4 l = half4(_LineColor.rgb * _LineColor.a, _LineColor.a);
+                return lerp(b, l, lineMask);
+            }
+            ENDHLSL
+        }
+    }
+}