BillboardShader.shader



  Shader "Instanced1/InstancedShader" {
    Properties {
		_Color("Color (RGBA)",color) = (1,1,1,1)
        _MainTex ("Albedo (RGB)", 2D) = "white" {}
		_ScaleX("Scale X", Range(0,100)) = 1
		_ScaleY("Scale Y", Range(0,100)) = 1
    }
    SubShader {

        Pass {

            Tags {"LightMode"="ForwardBase"}

            CGPROGRAM

            #pragma vertex vert
            #pragma fragment frag
            #pragma multi_compile_fwdbase nolightmap nodirlightmap nodynlightmap novertexlight
            #pragma target 4.5

            #include "UnityCG.cginc"
            #include "UnityLightingCommon.cginc"
            #include "AutoLight.cginc"


			 uniform float _ScaleX;
			uniform float _ScaleY;
            sampler2D _MainTex;
			fixed4 _Color;

        #if SHADER_TARGET >= 45
            StructuredBuffer<float4> positionBuffer;
        #endif

            struct v2f
            {
                float4 pos : SV_POSITION;
                float2 uv_MainTex : TEXCOORD0;
                float3 ambient : TEXCOORD1;
                float3 diffuse : TEXCOORD2;
                float3 color : TEXCOORD3;
                SHADOW_COORDS(4)
            };


            v2f vert (appdata_full v, uint instanceID : SV_InstanceID)
            {
            #if SHADER_TARGET >= 45
                float4 data = positionBuffer[instanceID];
            #else
                float4 data = 0;
            #endif


                float3 worldPosition = data.xyz * data.w;


                float3 worldNormal = v.normal;
                float3 ndotl = saturate(dot(worldNormal, _WorldSpaceLightPos0.xyz));
                float3 ambient = ShadeSH9(float4(worldNormal, 1.0f));
                float3 diffuse = (ndotl * _LightColor0.rgb);
                float3 color = v.color;

                v2f o;

				o.pos = mul(UNITY_MATRIX_P, mul(UNITY_MATRIX_MV, float4(worldPosition, 1.0)) + float4(v.vertex.x, v.vertex.y, 0.0, 0.0)  * float4(_ScaleX, _ScaleY, 1.0, 1.0));
                o.uv_MainTex = v.texcoord;
                o.ambient = ambient;
                o.diffuse = diffuse;
                o.color = color;
                TRANSFER_SHADOW(o)
                return o;
            }


            fixed4 frag (v2f i) : SV_Target
            {

                fixed shadow = SHADOW_ATTENUATION(i);
                fixed4 albedo = tex2D(_MainTex, i.uv_MainTex);
                float3 lighting = i.diffuse * shadow + i.ambient;
                fixed4 output = fixed4(albedo.rgb * i.color * lighting, albedo.w);
                UNITY_APPLY_FOG(i.fogCoord, output);
                return output  * _Color;
            }

            ENDCG
        }
    }
}