SurfaceBillbord.shader

Shader "Custom/surfaceBillbord" {
  Properties {
		_MainTex ("Base (RGB)", 2D) = "white" {}
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200
		
		CGPROGRAM
		#pragma surface surf Lambert vertex:vert

		sampler2D _MainTex;

		struct Input {
			float2 uv_MainTex;
		};
		
		void vert (inout appdata_full v){
			float3 view = mul(_World2Object, float4(_WorldSpaceCameraPos,1)).xyz;
			float3 up = float3(0,1,0);
			float3 right = normalize(cross(view, up));
			v.vertex.xyz = v.vertex.x*right + v.vertex.y*up;
		}

		void surf (Input IN, inout SurfaceOutput o) {
			half4 c = tex2D (_MainTex, IN.uv_MainTex);
			o.Albedo = c.rgb;
			o.Alpha = c.a;
		}
		ENDCG
	} 
	FallBack "Diffuse"
}