Graph Plotting Shader for Unity ShaderLab

GraphPlotter.shader

Shader "Custom/GraphPlotter" {

	Properties{
		_Division("Size", Range(10, 300)) = 0
		_Radius("Radius", Range(0, 1)) = 1
		_Color("Color", Color) = (0, 0, 0, 0)
	}

	SubShader{
		Tags{ "Queue" = "Transparent" "RenderType" = "Transparent" }

		CGINCLUDE
		#pragma target 5.0
		#include "UnityCG.cginc"

		int _Division;
		float _Radius;
		fixed4 _Color;

		struct appdata {
			float4 vertex : POSITION;
			float2 uv : TEXCOORD0;
		};

		struct v2f {
			float4 pos : SV_POSITION;
			float2 uv : TEXCOORD0;
		};

		v2f vert(appdata IN) {
			v2f OUT;

			OUT.pos = UnityObjectToClipPos(IN.vertex);
			OUT.uv = IN.uv;

			return OUT;
		}

		// x = ?y
		float plotXFunc(float2 uv, float pct) {
			return  smoothstep(pct - 0.02, pct, uv.x) - smoothstep(pct, pct + 0.02, uv.x);
		}

		float plotYFunc(float2 uv, float pct) {
			return  smoothstep(pct - 0.02, pct, uv.y) - smoothstep(pct, pct + 0.02, uv.y);
		}

		fixed4 frag(v2f IN) : SV_Target{

			float2 uv = IN.uv;

			/*float x = -4 * 0.2 * pow(uv.y - 0.5, 2) + 0.5 + 0.2;
			float res = plotXFunc(uv, x);*/

			float y = smoothstep(0, 1, uv.x);
			float res = plotYFunc(uv, y);

			return fixed4(res * _Color.rgb, _Color.a);
		}

		ENDCG

		Pass {
			Blend SrcAlpha OneMinusSrcAlpha
			Cull Off

			CGPROGRAM

			#pragma vertex vert
			#pragma fragment frag

			ENDCG
		}

	}
}