User:Baozhenliang/Destabilize

GrassDestabilizeShader.shader

Shader "Game/Grass/Destabilize"
{
Properties {
	_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
	_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
    _TimeScale ("Time Scale", float) = 0.1	
}
SubShader {
	Tags {"Queue"="AlphaTest" "IgnoreProjector"="True" "RenderType"="TransparentCutout"}
	LOD 100

	Lighting Off

	Pass {  
		CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"

			struct appdata_t {
				float4 vertex : POSITION;
				float2 texcoord : TEXCOORD0;
			};

			struct v2f {
				float4 vertex : SV_POSITION;
				half2 texcoord : TEXCOORD0;
				UNITY_FOG_COORDS(1)
			};

			sampler2D _MainTex;
			float4 _MainTex_ST;
			fixed _Cutoff;
            float _TimeScale;
			v2f vert (appdata_t v)
			{
				v2f o;				
				o.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
				float y = o.texcoord.y;
				float3 dir = ObjSpaceViewDir(v.vertex);
				
				v.vertex.xyz += sin(_Time.y) * y * _TimeScale;
				v.vertex.xyz += dir * _TimeScale;
				
				o.vertex = UnityObjectToClipPos(v.vertex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				fixed4 col = tex2D(_MainTex, i.texcoord);
				clip(col.a - _Cutoff);
				UNITY_APPLY_FOG(i.fogCoord, col);
				return col;
			}
		ENDCG
	}
}
}