Bongo score 7911
2018/09/07 19:41 投稿
| ビルトインシェーダーの`DefaultResourcesExtra/UI/UI-Default.shader`がご参考になりそうです。 |
| この中に、いかにも怪しげな`UNITY_UI_CLIP_RECT`や`_ClipRect`、`UnityGet2DClipping`といったキーワードが出てきますが、どうやらこれらでマスク範囲内かどうかを判定できるようです。 |
| たとえば下記のようにしてみるといかがでしょうか? |
| ```ShaderLab |
| Shader "Sprites/Default_Custom" |
| { |
| Properties |
| { |
| [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {} |
| _Color ("Tint", Color) = (1,1,1,1) |
| [MaterialToggle] PixelSnap ("Pixel snap", Float) = 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 |
| // 追加 |
| #include "UnityUI.cginc" |
| // 追加 |
| #pragma multi_compile __ UNITY_UI_CLIP_RECT |
| #include "UnityCG.cginc" |
| // 追加 |
| #include "UnityUI.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; |
| float4 worldPosition : TEXCOORD1; // 追加 |
| }; |
| fixed4 _Color; |
| v2f vert(appdata_t IN) |
| { |
| v2f OUT; |
| OUT.vertex = UnityObjectToClipPos(IN.vertex); |
| OUT.texcoord = IN.texcoord; |
| OUT.worldPosition = IN.vertex; // 追加 |
| OUT.color = IN.color * _Color; |
| #ifdef PIXELSNAP_ON |
| OUT.vertex = UnityPixelSnap (OUT.vertex); |
| #endif |
| return OUT; |
| } |
| sampler2D _MainTex; |
| sampler2D _AlphaTex; |
| float4 _ClipRect; // 追加 |
| 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; |
| // 追加 |
| #ifdef UNITY_UI_CLIP_RECT |
| c.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect); |
| clip (c.a - 0.001); |
| #endif //UNITY_UI_CLIP_RECT |
| c.rgb = c.rgb*2+max(fixed3(0,0,0),IN.color.rgb-0.5)*2; |
| c.rgb *= c.a; |
| return c; |
| } |
| ENDCG |
| } |
| } |
| } |
| ``` |
