Windows Terminal 1.6pre ピクセルシェーダ+Rubyスクリプトでアニメーション

gaming.hlsl

Texture2D shaderTexture;
SamplerState samplerState;

cbuffer PixelShaderSettings {
  float  Time;
  float  Scale;
  float2 Resolution;
  float4 Background;
};

float3 hsv2rgb(float3 hsv)
{
    // ref. https://gist.github.com/iUltimateLP/5129149bf82757b31542
    float4 K = float4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
    float3 p = abs(frac(hsv.xxx + K.xyz) * 6.0 - K.www);
    return hsv.z * lerp(K.xxx, clamp(p - K.xxx, 0.0, 1.0), hsv.y);
}

float4 main(float4 pos : SV_POSITION, float2 tex : TEXCOORD) : SV_TARGET
{
    float4 t = shaderTexture.Sample(samplerState, float2(0.0, 0.0));
    float4 color = shaderTexture.Sample(samplerState, tex);
    if (tex.x * Resolution.x % 20 < 1.0 || tex.y * Resolution.y % 20 < 1.0)
    {
       color.xyz += hsv2rgb(float3(t.x * 8 + (tex.x + tex.y) / 4, 1.0, 0.6));
    }
    return color;
}

grad.rb

begin
  i = 0
  while true
    print "\e[0;0H\e[48;2;#{i};#{i};#{i}m  "
    sleep 0.03
    i = (i + 1) & 0xff
  end
rescue Interrupt
  puts "\e[0m\e[2J"
end