192 lines
6.2 KiB
GLSL
192 lines
6.2 KiB
GLSL
Shader "BriarQueen/UI/Dissolve Blue Particles"
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{
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Properties
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{
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[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
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_Color ("Tint", Color) = (1, 1, 1, 1)
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_DissolveAmount ("Dissolve Amount", Range(0, 1)) = 0
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_EdgeWidth ("Edge Width", Range(0.001, 0.25)) = 0.06
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_ParticleColor ("Particle Color", Color) = (0.15, 0.65, 1, 1)
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_ParticleIntensity ("Particle Intensity", Range(0, 8)) = 2.5
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_ParticleDensity ("Particle Density", Range(0, 1)) = 0.82
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_ParticleScale ("Particle Scale", Range(10, 250)) = 95
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_ParticleDrift ("Particle Drift", Range(0, 3)) = 0.65
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_NoiseScale ("Noise Scale", Range(1, 80)) = 24
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_NoiseStrength ("Noise Strength", Range(0, 1)) = 0.55
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[Toggle] _ReverseDirection ("Reverse Direction", Float) = 0
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_StencilComp ("Stencil Comparison", Float) = 8
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_Stencil ("Stencil ID", Float) = 0
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_StencilOp ("Stencil Operation", Float) = 0
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_StencilWriteMask ("Stencil Write Mask", Float) = 255
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_StencilReadMask ("Stencil Read Mask", Float) = 255
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_ColorMask ("Color Mask", Float) = 15
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[Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0
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}
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SubShader
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{
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Tags
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{
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"Queue" = "Transparent"
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"IgnoreProjector" = "True"
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"RenderType" = "Transparent"
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"PreviewType" = "Plane"
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"CanUseSpriteAtlas" = "True"
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}
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Stencil
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{
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Ref [_Stencil]
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Comp [_StencilComp]
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Pass [_StencilOp]
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ReadMask [_StencilReadMask]
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WriteMask [_StencilWriteMask]
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}
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Cull Off
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Lighting Off
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ZWrite Off
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ZTest [unity_GUIZTestMode]
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Blend SrcAlpha OneMinusSrcAlpha
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ColorMask [_ColorMask]
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Pass
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{
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Name "Default"
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CGPROGRAM
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#pragma vertex Vert
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#pragma fragment Frag
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#pragma target 2.0
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#include "UnityCG.cginc"
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#include "UnityUI.cginc"
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#pragma multi_compile_local _ UNITY_UI_CLIP_RECT
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#pragma multi_compile_local _ UNITY_UI_ALPHACLIP
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struct AppData
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{
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float4 vertex : POSITION;
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float4 color : COLOR;
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float2 texcoord : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct Varyings
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{
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float4 vertex : SV_POSITION;
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fixed4 color : COLOR;
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float2 uv : TEXCOORD0;
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float4 worldPosition : TEXCOORD1;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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sampler2D _MainTex;
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fixed4 _Color;
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fixed4 _TextureSampleAdd;
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float4 _ClipRect;
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float _DissolveAmount;
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float _EdgeWidth;
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fixed4 _ParticleColor;
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float _ParticleIntensity;
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float _ParticleDensity;
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float _ParticleScale;
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float _ParticleDrift;
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float _NoiseScale;
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float _NoiseStrength;
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float _ReverseDirection;
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float Hash21(float2 p)
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{
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p = frac(p * float2(123.34, 345.45));
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p += dot(p, p + 34.345);
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return frac(p.x * p.y);
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}
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float ValueNoise(float2 uv)
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{
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float2 i = floor(uv);
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float2 f = frac(uv);
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float2 u = f * f * (3.0 - 2.0 * f);
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float a = Hash21(i);
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float b = Hash21(i + float2(1.0, 0.0));
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float c = Hash21(i + float2(0.0, 1.0));
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float d = Hash21(i + float2(1.0, 1.0));
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return lerp(lerp(a, b, u.x), lerp(c, d, u.x), u.y);
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}
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float DissolveNoise(float2 uv)
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{
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float n = ValueNoise(uv * _NoiseScale);
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n += ValueNoise(uv * _NoiseScale * 2.13 + 17.0) * 0.5;
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n += ValueNoise(uv * _NoiseScale * 4.07 + 43.0) * 0.25;
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n /= 1.75;
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float verticalBias = lerp(uv.y, 1.0 - uv.y, step(0.5, _ReverseDirection));
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return saturate(lerp(verticalBias, n, _NoiseStrength));
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}
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Varyings Vert(AppData input)
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{
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Varyings output;
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UNITY_SETUP_INSTANCE_ID(input);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
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output.worldPosition = input.vertex;
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output.vertex = UnityObjectToClipPos(input.vertex);
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output.uv = input.texcoord;
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output.color = input.color * _Color;
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return output;
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}
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fixed4 Frag(Varyings input) : SV_Target
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{
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fixed4 color = (tex2D(_MainTex, input.uv) + _TextureSampleAdd) * input.color;
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#ifdef UNITY_UI_CLIP_RECT
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color.a *= UnityGet2DClipping(input.worldPosition.xy, _ClipRect);
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#endif
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float amount = saturate(_DissolveAmount);
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float dissolveNoise = DissolveNoise(input.uv);
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float visible = smoothstep(amount - _EdgeWidth, amount + _EdgeWidth, dissolveNoise);
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visible = amount <= 0.001 ? 1.0 : visible;
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visible = amount >= 0.999 ? 0.0 : visible;
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float edge = 1.0 - smoothstep(0.0, _EdgeWidth, abs(dissolveNoise - amount));
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edge *= step(0.001, amount) * step(amount, 0.999);
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float2 particleUv = input.uv * _ParticleScale;
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particleUv.y += _Time.y * _ParticleDrift;
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particleUv.x += sin(_Time.y + input.uv.y * 12.0) * 0.35;
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float particles = step(_ParticleDensity, Hash21(floor(particleUv)));
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particles *= edge;
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particles *= visible;
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color.rgb += _ParticleColor.rgb * particles * _ParticleIntensity;
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color.rgb = lerp(color.rgb, _ParticleColor.rgb, edge * 0.35);
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color.a *= visible;
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#ifdef UNITY_UI_ALPHACLIP
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clip(color.a - 0.001);
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#endif
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return color;
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}
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ENDCG
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}
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}
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}
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