ProjectArcade

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/*
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    Scanlines Sine Absolute Value
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    An ultra light scanline shader
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    by RiskyJumps
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	license: public domain
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*/
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#include "ReShade.fxh"
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uniform float texture_sizeY <
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	ui_type = "drag";
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	ui_min = 1.0;
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	ui_max = BUFFER_HEIGHT;
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	ui_label = "Scanlines Height [Scanlines-Absolute]";
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> = 240.0;
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uniform float amp <
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	ui_type = "drag";
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	ui_min = 0.0;
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	ui_max = 2.0;
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	ui_step = 0.05;
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	ui_label = "Amplitude [Scanlines-Absolute]";
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> = 1.25;
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uniform float phase <
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	ui_type = "drag";
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	ui_min = 0.0;
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	ui_max = 2.0;
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	ui_step = 0.05;
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	ui_label = "Phase [Scanlines-Absolute]";
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> = 0.0;
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uniform float lines_black <
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	ui_type = "drag";
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	ui_min = 0.0;
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	ui_max = 1.0;
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	ui_step = 0.05;
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	ui_label = "Lines Blacks [Scanlines-Absolute]";
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> = 0.0;
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uniform float lines_white <
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	ui_type = "drag";
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	ui_min = 0.0;
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	ui_max = 2.0;
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	ui_step = 0.05;
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	ui_label = "Lines Whites [Scanlines-Absolute]";
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> = 1.0;
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#define freq             0.500000
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#define offset           0.000000
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#define pi               3.141592654
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float4 PS_ScanlinesAbs(float4 pos : SV_POSITION, float2 tex : TEXCOORD0, float angle : TEXCOORD2) : SV_TARGET 
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{
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    float3 color = tex2D(ReShade::BackBuffer, tex).xyz;
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    float grid;
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    float lines;
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	float omega = 2.0 * pi * freq;  // Angular frequency
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	angle = tex.y * omega * texture_sizeY + phase;
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    lines = sin(angle);
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    lines *= amp;
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    lines += offset;
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    lines = abs(lines) * (lines_white - lines_black) + lines_black;
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    color *= lines;
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    return color.xyzz;
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}
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technique ScanlinesAbs {
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	pass ScanlinesAbsolute{
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		VertexShader = PostProcessVS;
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		PixelShader = PS_ScanlinesAbs;
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	}
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}