Animated 2D spheres

Author: przemyslawzaworski

spheres.shader

@@ -0,0 +1,38 @@
+Shader "Spheres"
+{
+	SubShader
+	{
+		Pass
+		{
+			CGPROGRAM
+			#pragma vertex vertex_shader
+			#pragma fragment pixel_shader
+			
+			float2 hash( float2 p )
+			{
+				float2 q = float2(dot(p,float2(127.1,311.7)),dot(p,float2(269.5,183.3)));
+				return frac(sin(q)*43758.5453);
+			}
+			
+			void vertex_shader (inout float4 vertex:POSITION,inout float2 uv:TEXCOORD0)
+			{
+				vertex = UnityObjectToClipPos(vertex);
+			}
+			
+			float4 pixel_shader (float4 vertex:POSITION,float2 uv:TEXCOORD0) : SV_TARGET
+			{
+				uv = float2(2.0*uv-1.0);
+				float2 k = float2(0.0,0.0); 
+				for (float i=0.0;i<100.0;i++)
+				{
+					float2 h = hash(float2(i,i));
+					float2 p = cos(h*_Time.g);
+					float d = length(uv-p);
+					k+=smoothstep(0.04,0.03,d);
+				}
+				return float4(k,0.0,1.0);
+			}
+			ENDCG
+		}
+	}
+}