140 lines
4.7 KiB
Plaintext
140 lines
4.7 KiB
Plaintext
Shader "Fluxy/Rendering/Flipbooks/FlipbookPlaybackInterpolated"
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{
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Properties
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{
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_MainTex ("Density flipbook", 2D) = "white" {}
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_Velocity ("Velocity flipbook", 2D) = "white" {}
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_Detail ("Detail", 2D) = "white" {}
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_Gradient ("Gradient", 2D) = "white" {}
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_Duration ("Duration (seconds)", Float) = 2
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_FrameCount ("Total frames", Integer) = 16
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_Columns ("Columns", Integer) = 4
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_PlaybackSpeed ("Playback Speed", Float) = 1
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_PlaybackOffset("Playback Offset", Float) = 0
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_Interpolation ("Interpolation", Range(0.0, 1.0)) = 1
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_DetailAdvection("Detail Advection", Range(0.0, 1.0)) = 0.5
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_Additiveness("Additiveness", Range(0.0, 1.0)) = 0
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_Falloff("Edge Falloff", Range(0.0, 1.0)) = 0.2
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_InvFade ("Soft Particles Factor", Range(0.01,8.0)) = 1.0
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}
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SubShader
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{
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Cull Off
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Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
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ZWrite Off
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Pass
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{
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Name "Render"
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Blend One OneMinusSrcAlpha
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HLSLPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma multi_compile_particles
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#include "UnityCG.cginc"
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#include "../FluidUtils.hlsl"
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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#ifdef SOFTPARTICLES_ON
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float4 projPos : TEXCOORD1;
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#endif
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};
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float4 _Detail_ST;
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v2f vert (appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv = v.uv;
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#ifdef SOFTPARTICLES_ON
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o.projPos = ComputeScreenPos (o.vertex);
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COMPUTE_EYEDEPTH(o.projPos.z);
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#endif
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return o;
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}
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sampler2D _MainTex;
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sampler2D _Detail;
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sampler2D _Gradient;
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float _DetailAdvection;
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float _Additiveness;
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float _Falloff;
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float _InvFade;
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float _Duration;
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int _FrameCount;
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int _Columns;
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float _PlaybackSpeed;
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float _PlaybackOffset;
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float _Interpolation;
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#ifdef SOFTPARTICLES_ON
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UNITY_DECLARE_DEPTH_TEXTURE(_CameraDepthTexture);
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#endif
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float4 frag (v2f i) : SV_Target
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{
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float frameDuration = _Duration / _FrameCount;
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int rows = ceil(_FrameCount / (float)_Columns);
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float currentFrame = (_Time.y + _PlaybackOffset) / frameDuration * _PlaybackSpeed;
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float2 uv = FlipbookUV(i.uv, rows, _Columns, _FrameCount, currentFrame);
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float frameProgress = frac(currentFrame);
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float2 frameSize = float2(_Columns, rows);
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float2 uv2 = FlipbookUV(i.uv, rows, _Columns, _FrameCount, currentFrame + 1);
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float2 velocity = UnpackVelocity(tex2D(_Velocity,uv).xy);
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float2 velocity2 = UnpackVelocity(tex2D(_Velocity,uv2).xy);
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float4 state = tex2D(_MainTex, uv - velocity * frameProgress * frameDuration / frameSize * _Interpolation);
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float4 state2 = tex2D(_MainTex, uv2 + velocity2 * (1 - frameProgress) * frameDuration / frameSize * _Interpolation );
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state = lerp(state, state2, frameProgress);
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// look up detail map:
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float detail = tex2D_flowmap(_Detail,TRANSFORM_TEX(i.uv, _Detail), velocity, _DetailAdvection * _PlaybackSpeed).r;
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// lookup gradient:
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float4 grad = tex2D(_Gradient, float2(state.a * detail.r,0.5f));
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#ifdef SOFTPARTICLES_ON
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float sceneZ = LinearEyeDepth (SAMPLE_DEPTH_TEXTURE_PROJ(_CameraDepthTexture, UNITY_PROJ_COORD(i.projPos)));
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float partZ = i.projPos.z;
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float fade = saturate (_InvFade * (sceneZ-partZ));
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state.a *= fade;
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#endif
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// calculate additiveness (using premultiplied alpha)
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float4 color = AlphaAdditiveBlend(grad * state,_Additiveness);
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// edge falloff
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float falloff = SquareFalloff(i.uv,_Falloff);
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return color * falloff;
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}
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ENDHLSL
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}
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}
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}
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