Assets/raymarched/Raymarch_origin.mat

@@ -64,7 +64,7 @@ Material:
     - _Glossiness: 0.5
     - _GlossyReflections: 1
     - _MaxDist: 100
-    - _MaxSteps: 128
+    - _MaxSteps: 256
     - _Metallic: 0
     - _Mode: 0
     - _OcclusionStrength: 1
@@ -72,7 +72,7 @@ Material:
     - _SmoothnessTextureChannel: 0
     - _SpecularHighlights: 1
     - _SrcBlend: 1
-    - _SurfDist: 0.01
+    - _SurfDist: 0.001
     - _UVSec: 0
     - _ZWrite: 1
     m_Colors:

Assets/raymarched/Raymarch_secondary.mat

@@ -64,7 +64,7 @@ Material:
     - _Glossiness: 0.5
     - _GlossyReflections: 1
     - _MaxDist: 100
-    - _MaxSteps: 128
+    - _MaxSteps: 256
     - _Metallic: 0
     - _Mode: 0
     - _OcclusionStrength: 1
@@ -72,7 +72,7 @@ Material:
     - _SmoothnessTextureChannel: 0
     - _SpecularHighlights: 1
     - _SrcBlend: 1
-    - _SurfDist: 0.01
+    - _SurfDist: 0.001
     - _UVSec: 0
     - _ZWrite: 1
     m_Colors:

Assets/raymarched/Raymarching.unity

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Assets/raymarched/raymarch_origin copy.shader

@@ -0,0 +1,192 @@
+Shader "CrispyPin/Raymarch1"
+{
+    Properties
+    {
+        [Header(Raymarcher Properties)]
+        _MaxSteps ("Max steps", Int) = 256
+        _MaxDist ("Max distance", Float) = 100
+        _SurfDist ("Surface distance threshold", Range(0.00001, 0.05)) = 0.001
+    }
+    SubShader
+    {
+        Tags { "RenderType"="Opaque" }
+        Cull Off
+        LOD 100
+
+   /*      Pass{
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+
+            #include "UnityCG.cginc"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+            };
+
+            struct v2f
+            {
+                float4 vertex : SV_POSITION;
+                float3 ro : TEXCOORD1;
+                float3 hitPos : TEXCOORD2;
+            };
+
+
+             v2f vert (appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                //object space
+                o.ro = mul(unity_WorldToObject, float4(_WorldSpaceCameraPos, 1));
+                o.hitPos = v.vertex;
+                //world space
+                //o.ro = _WorldSpaceCameraPos;
+                //o.hitPos = mul(unity_ObjectToWorld, v.vertex);
+                return o;
+            }
+
+            fixed4 frag (v2f i) : SV_Target
+            {
+                discard;
+                return fixed4(0,0,0,0);
+            }
+
+            ENDCG
+        } */
+
+        Pass
+        {
+            Name "AddPass"
+            Tags { "LightMode" = "ForwardAdd"}
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+
+            #include "UnityCG.cginc"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+            };
+
+            struct v2f
+            {
+                float4 vertex : SV_POSITION;
+                float3 ro : TEXCOORD1;
+                float3 hitPos : TEXCOORD2;
+            };
+
+            int _MaxSteps;
+            float _MaxDist;
+            float _SurfDist;
+
+            v2f vert (appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                //object space
+                o.ro = mul(unity_WorldToObject, float4(_WorldSpaceCameraPos, 1));
+                o.hitPos = v.vertex;
+                //world space
+                //o.ro = _WorldSpaceCameraPos;
+                //o.hitPos = mul(unity_ObjectToWorld, v.vertex);
+                return o;
+            }
+
+            float smoothMin(float a, float b, float k)
+            {
+                return min(a, b) - pow(max(k - abs(a-b), 0), 3)/(6*k*k);
+            }
+
+            float sdSphere(float3 p, float3 o, float r) {
+                return length(p - o) - r;
+            }
+
+            float sdBox(float3 p, float3 dim)
+            {
+                return length(float3(
+                    max(abs(p.x) - dim.x/2.0, 0),
+                    max(abs(p.y) - dim.y/2.0, 0),
+                    max(abs(p.z) - dim.z/2.0, 0)));
+            }
+
+            float3 repDomain(float3 p, float3 r)
+            {
+                return fmod(abs(p + r/2.0), r) - r/2.0;
+            }
+
+
+            float GetDist(float3 p)
+            {
+/*                 float d = 0;
+
+                float s = sin(100*_Time + p.x*10) * 0.02 + 0.028;
+                float s2 = cos(105*_Time + p.x*10) * 0.02 + 0.028;
+                //s += sin(p.x/10)*0.03;
+
+                float3 rep = repDomain(p, float3(0.026, 0.15, 0.2));// fmod(abs(p + 0.05), 0.1)-0.05;
+                d = sdBox(rep, float3(0.02, s2, s)) - 0.004;
+                d = smoothMin(d, sdBox(rep, float3(0.01, s*1.0, s2*1.5)) - 0.004, 0.01);
+ */
+                float d = sdSphere(p, 0, 0.1f);
+                // float3 second =  ObjSpaceLightDir(0);
+                // float3 second = _WorldSpaceLightPos0;
+                float3 second = mul(unity_WorldToObject, _WorldSpaceLightPos0);
+                d = smoothMin(d, sdBox(p-second, 0.3f), 0.2);
+                //d = smoothMin(d, sdSphere(p, float3(0,0,0), 5), .3);
+                return d;
+            }
+
+            //marches a ray through the scene
+            float Raymarch(float3 ro, float3 rd)
+            {
+                float rayLen = 0;// total distance marched / distance from origin
+                float dist; // distance from the raymarched scene
+                for ( int i = 0; i < _MaxSteps; i++)
+                {
+                    //position = origin + distance * direction
+                    float3 p = ro + rayLen * rd;
+                    dist = GetDist(p);
+                    rayLen += dist;// move forward
+                    if (dist < _SurfDist || rayLen > _MaxDist) {
+                        break;
+                    }
+                }
+
+                return rayLen;
+            }
+
+            float3 GetNormal(float3 p)
+            {
+                float2 e = float2(0.001, 0);
+                float3 n = GetDist(p) - float3(
+                    GetDist(p-e.xyy),
+                    GetDist(p-e.yxy),
+                    GetDist(p-e.yyx));
+                return normalize(n);
+            }
+
+            fixed4 frag (v2f i) : SV_Target
+            {
+                float3 ro = i.ro;
+                float3 rd = normalize(i.hitPos - ro);
+
+                float d = Raymarch(ro, rd);
+                fixed4 col = 1;
+
+                if (d >= _MaxDist)
+                {
+                    discard;
+                }
+                float3 p = ro + rd * d;
+                float3 n = GetNormal(p);
+
+                col.rgb = dot(n, normalize(float3(1,0.5,1)));
+                col *= float4(d, 1, 1, 1);
+                return col;
+            }
+            ENDCG
+        }
+    }
+}

Assets/raymarched/raymarch_origin copy.shader.meta

@@ -0,0 +1,9 @@
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Assets/raymarched/raymarch_origin.shader

@@ -1,4 +1,4 @@
-Shader "CrispyPin/RaymarchOrigin"
+Shader "CrispyPin/Raymarch1"
 {
 	Properties
 	{

Assets/raymarched/raymarcher.cginc

@@ -170,8 +170,7 @@ fragOut frag (v2f i) {
 	float3 n = GetNormal(p);
 
 	// col.rgb = max(dot(n, normalize(float3(1,0.5,1))), 0.05f);
-
+	col.r = dot(-rd, n);
-	col.rgb = lerp(0, float3(0,1,1), pow(1 - dot(-rd, n), 2));
 
 	// col *= float4(d, 1, 1, 1);
 	fragOut o;

Assets/raymarched/surf_t.shader

@@ -0,0 +1,54 @@
+Shader "Custom/surf_t"
+{
+    Properties
+    {
+        _Color ("Color", Color) = (1,1,1,1)
+        _MainTex ("Albedo (RGB)", 2D) = "white" {}
+        _Glossiness ("Smoothness", Range(0,1)) = 0.5
+        _Metallic ("Metallic", Range(0,1)) = 0.0
+    }
+    SubShader
+    {
+        Tags { "RenderType"="Opaque" }
+        LOD 200
+
+        CGPROGRAM
+        // Physically based Standard lighting model, and enable shadows on all light types
+        #pragma surface surf Standard fullforwardshadows
+
+        // Use shader model 3.0 target, to get nicer looking lighting
+        #pragma target 3.0
+
+        sampler2D _MainTex;
+
+        struct Input
+        {
+            float2 uv_MainTex;
+        };
+
+        half _Glossiness;
+        half _Metallic;
+        fixed4 _Color;
+
+        // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
+        // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
+        // #pragma instancing_options assumeuniformscaling
+        UNITY_INSTANCING_BUFFER_START(Props)
+            // put more per-instance properties here
+        UNITY_INSTANCING_BUFFER_END(Props)
+
+        void surf (Input IN, inout SurfaceOutputStandard o)
+        {
+            // Albedo comes from a texture tinted by color
+            fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
+            o.Albedo = c.rgb;
+            // Metallic and smoothness come from slider variables
+            o.Metallic = _Metallic;
+            o.Smoothness = _Glossiness;
+            o.Alpha = c.a;
+            // o.Depth += 0.1;
+        }
+        ENDCG
+    }
+    FallBack "Diffuse"
+}

Assets/raymarched/surf_t.shader.meta

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Assets/raymarched/tes.shader

@@ -0,0 +1,89 @@
+Shader "Unlit/tes"
+{
+	Properties
+	{
+		_MainTex ("Texture", 2D) = "white" {}
+		_Color ("Color", Color) = (1,1,1,1)
+
+	}
+	SubShader
+	{
+		Tags { "RenderType"="Opaque" }
+		LOD 100
+			ZWrite On
+
+
+		Pass
+		{
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			// make fog work
+			#pragma multi_compile_fog
+
+			#include "UnityCG.cginc"
+
+			struct appdata
+			{
+				float4 vertex : POSITION;
+				float2 uv : TEXCOORD0;
+			};
+
+			struct v2f
+			{
+				float2 uv : TEXCOORD0;
+				// UNITY_FOG_COORDS(1)
+				float4 vertex : SV_POSITION;
+				float3 ro : TEXCOORD1;
+				float3 vert_obspace : TEXCOORD2;
+			};
+
+			struct fragOut
+			{
+				fixed4 col : SV_Target;
+				float depth : SV_Depth;
+			};
+
+
+			sampler2D _MainTex;
+			float4 _MainTex_ST;
+			float4 _Color;
+
+			v2f vert (appdata v)
+			{
+				v2f o;
+				o.vertex = UnityObjectToClipPos(v.vertex);
+				o.vert_obspace = v.vertex;
+				o.ro = mul(unity_WorldToObject, float4(_WorldSpaceCameraPos, 1));
+
+				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+				// UNITY_TRANSFER_FOG(o,o.vertex);
+				return o;
+			}
+
+			fragOut frag (v2f i)
+			{
+				// sample the texture
+				fixed4 col = tex2D(_MainTex, i.uv);
+
+				// apply fog
+				// UNITY_APPLY_FOG(i.fogCoord, col);
+				fragOut o;
+				// o.col = _Color*0.5;
+				o.col.a=1;
+				// o.depth = 1;
+
+				float3 rd = normalize(i.vert_obspace - i.ro);
+				float d = 0;//-0.1;
+			   	float4 vClipPos = mul(UNITY_MATRIX_VP, mul(unity_ObjectToWorld, i.vert_obspace));
+				// o.depth = (vClipPos.z / vClipPos.w + 1.0) * 0.5 ;
+
+				// o.col.r = o.depth;
+				// o.col.gb = i.ro;
+
+				return o;
+			}
+			ENDCG
+		}
+	}
+}

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Assets/raymarched/test.mat

@@ -0,0 +1,77 @@
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lenia-kernel/Cargo.toml

@@ -6,4 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-image = { version = "0.24.6", features = ["png"], default-features = false }
+image = { version = "0.24.6", default_features = false, features = ["png"] }