shaders innit

2025-10-23 17:43:57 +11:00
1 parent 7d8cdb8d6e
commit 177f7bbbba
@@ -0,0 +1,108 @@
+// https://www.shadertoy.com/view/llcXW7
+Shader "Custom/Foamy Water"
+{
+
+	Properties
+	{
+		//_MainTex ("Texture", 2D) = "white" {}		
+		_MAX_ITER("Max iteration",Range(1,32)) = 4
+		_TILING_FACTOR("Tiling Factor",Range(0.01,5.0)) = 1.0
+		_Speed("Speed",Range(0.01,5.0)) = 0.1
+		_DistCenterPower("Dist Center Power",Range(0.1,20.0)) = 2.0
+		_Color("Color",Color) = (1,1,1)
+	}
+
+	SubShader
+	{
+		Tags { "RenderType" = "Transparent" "Queue" = "Transparent" }
+
+		Pass
+		{
+			ZWrite Off
+			Blend SrcAlpha OneMinusSrcAlpha
+
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+
+			#include "UnityCG.cginc"
+
+			struct VertexInput
+			{
+				fixed4 vertex : POSITION;
+				fixed2 uv:TEXCOORD0;
+			};
+
+			struct VertexOutput 
+			{
+				fixed4 pos : SV_POSITION;
+				fixed2 uv:TEXCOORD0;
+			};
+
+			// Modified from k-mouse (2016-11-23)
+			// Modified from David Hoskins (2013-07-07) and joltz0r (2013-07-04)
+
+			#define TAU 6.28318530718 //6.28318530718
+
+			fixed _TILING_FACTOR;
+			fixed _MAX_ITER;
+			fixed _Speed;
+			fixed _DistCenterPower;
+			fixed4 _Color;
+
+
+			fixed waterHighlight(fixed2 p, fixed time, fixed foaminess)
+			{
+				fixed2 i = p;
+				fixed c = 0.0;
+				fixed foaminess_factor = lerp(1.0, 6.0, foaminess);
+				fixed inten = .005 * foaminess_factor;
+
+				for (int n = 0; n < _MAX_ITER; n++) 
+				{
+					fixed t = time * (1.0 - (3.5 / fixed(n+1)));
+					i = p + fixed2(cos(t - i.x) + sin(t + i.y), sin(t - i.y) + cos(t + i.x));
+					c += 1.0/length(fixed2(p.x / (sin(i.x+t)), p.y / (cos(i.y+t))));
+				}
+				c = 0.2 + c / (inten * _MAX_ITER);
+				c = 1.17-pow(c, 1.4);
+				c = pow(abs(c), 8.0);
+				return c / sqrt(foaminess_factor);
+			}
+
+			VertexOutput vert (VertexInput v)
+			{
+				VertexOutput o;
+				o.pos = UnityObjectToClipPos (v.vertex);
+				o.uv = v.uv;
+				return o;
+			}
+
+			fixed4 frag(VertexOutput i) : SV_Target
+			{
+				
+				fixed time = _Time.y * _Speed +23.0;
+				
+				fixed dist_center = pow(2.0*length(i.uv - 0.5), _DistCenterPower);
+				
+				fixed foaminess = smoothstep(0.4, 1.8, dist_center);
+				fixed clearness = 0.1 + 0.9*smoothstep(0.1, 0.5, dist_center);
+				
+				fixed2 p = fmod(i.uv*TAU*_TILING_FACTOR, TAU)-250.0;
+				
+				fixed c = waterHighlight(p, time, foaminess);
+				
+				fixed3 water_color = fixed3(0.0, 0.35, 0.5);
+				fixed3 color = fixed3(c,c,c);
+				color = clamp(color + water_color, 0.0, 1.0);
+				
+				color = lerp(water_color, color, clearness);
+
+				return fixed4(color*_Color.rgb, c * _Color.a);
+
+			}
+			ENDCG
+		}
+	}
+}
+