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September 10, 2016 01:30
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Spriteで高さフォグもどき
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Shader "TSKT/Sprites/HeightGradation" | |
{ | |
Properties | |
{ | |
[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {} | |
_Color ("Tint", Color) = (1,1,1,1) | |
[MaterialToggle] PixelSnap ("Pixel snap", Float) = 0 | |
_GradationColor("GradationColor", Color) = (0,0,0,1) | |
_GradationRange("GradationRange", Vector) = (10, -10, 0.0, 0.0) | |
} | |
SubShader | |
{ | |
Tags | |
{ | |
"Queue"="Transparent" | |
"IgnoreProjector"="True" | |
"RenderType"="Transparent" | |
"PreviewType"="Plane" | |
"CanUseSpriteAtlas"="True" | |
} | |
Cull Off | |
Lighting Off | |
ZWrite Off | |
Blend One OneMinusSrcAlpha | |
Pass | |
{ | |
CGPROGRAM | |
#pragma vertex vert | |
#pragma fragment frag | |
#pragma target 2.0 | |
#pragma multi_compile _ PIXELSNAP_ON | |
#pragma multi_compile _ ETC1_EXTERNAL_ALPHA | |
#include "UnityCG.cginc" | |
struct appdata_t | |
{ | |
float4 vertex : POSITION; | |
float4 color : COLOR; | |
float2 texcoord : TEXCOORD0; | |
}; | |
struct v2f | |
{ | |
float4 vertex : SV_POSITION; | |
fixed4 color : COLOR; | |
float2 texcoord : TEXCOORD0; | |
fixed gradationIntensity : ANY; | |
}; | |
fixed4 _Color; | |
fixed4 _GradationColor; | |
fixed4 _GradationRange; | |
v2f vert(appdata_t IN) | |
{ | |
v2f OUT; | |
OUT.vertex = UnityObjectToClipPos(IN.vertex); | |
OUT.texcoord = IN.texcoord; | |
OUT.color = IN.color * _Color; | |
#ifdef PIXELSNAP_ON | |
OUT.vertex = UnityPixelSnap (OUT.vertex); | |
#endif | |
fixed worldPositionY = mul(unity_ObjectToWorld, IN.vertex).y; | |
fixed begin = _GradationRange.x; | |
fixed end = _GradationRange.y; | |
OUT.gradationIntensity = (worldPositionY - begin) / (end - begin); | |
return OUT; | |
} | |
sampler2D _MainTex; | |
sampler2D _AlphaTex; | |
fixed4 SampleSpriteTexture (float2 uv) | |
{ | |
fixed4 color = tex2D (_MainTex, uv); | |
#if ETC1_EXTERNAL_ALPHA | |
// get the color from an external texture (usecase: Alpha support for ETC1 on android) | |
color.a = tex2D (_AlphaTex, uv).r; | |
#endif //ETC1_EXTERNAL_ALPHA | |
return color; | |
} | |
fixed4 frag(v2f IN) : SV_Target | |
{ | |
fixed4 c = SampleSpriteTexture(IN.texcoord) * IN.color; | |
fixed gradation = clamp(IN.gradationIntensity, 0.0, 1.0) * _GradationColor.a; | |
c.rgb = lerp(c.rgb, _GradationColor.rgb, gradation); | |
c.rgb *= c.a; | |
return c; | |
} | |
ENDCG | |
} | |
} | |
} |
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