SurfaceBiomeShader.cs

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using System;
using Microsoft.Xna.Framework;
using ReLogic.Peripherals.RGB;
 
namespace Terraria.GameContent.RGB;
 
public class SurfaceBiomeShader : ChromaShader
{
    private readonly Vector4 _primaryColor;
 
    private readonly Vector4 _secondaryColor;
 
    private Vector4 _surfaceColor;
 
    private float _starVisibility;
 
    public SurfaceBiomeShader(Color primaryColor, Color secondaryColor)
    {
        _primaryColor = primaryColor.ToVector4();
        _secondaryColor = secondaryColor.ToVector4();
    }
 
    public override void Update(float elapsedTime)
    {
        _surfaceColor = Main.ColorOfTheSkies.ToVector4() * 0.75f + Vector4.One * 0.25f;
        if (Main.dayTime)
        {
            float num = (float)(Main.time / 54000.0);
            if (num < 0.25f)
            {
                _starVisibility = 1f - num / 0.25f;
            }
            else if (num > 0.75f)
            {
                _starVisibility = (num - 0.75f) / 0.25f;
            }
        }
        else
        {
            _starVisibility = 1f;
        }
    }
 
    [RgbProcessor(/*Could not decode attribute arguments.*/)]
    private void ProcessLowDetail(RgbDevice device, Fragment fragment, EffectDetailLevel quality, float time)
    {
        Vector4 value = _primaryColor * _surfaceColor;
        Vector4 value2 = _secondaryColor * _surfaceColor;
        for (int i = 0; i < fragment.Count; i++)
        {
            Vector4 vector = Vector4.Lerp(value, value2, (float)Math.Sin(time * 0.5f + fragment.GetCanvasPositionOfIndex(i).X) * 0.5f + 0.5f);
            fragment.SetColor(i, vector);
        }
    }
 
    [RgbProcessor(/*Could not decode attribute arguments.*/)]
    private void ProcessHighDetail(RgbDevice device, Fragment fragment, EffectDetailLevel quality, float time)
    {
        Vector4 value = _primaryColor * _surfaceColor;
        Vector4 value2 = _secondaryColor * _surfaceColor;
        for (int i = 0; i < fragment.Count; i++)
        {
            Vector2 canvasPositionOfIndex = fragment.GetCanvasPositionOfIndex(i);
            Point gridPositionOfIndex = fragment.GetGridPositionOfIndex(i);
            float amount = (float)Math.Sin(canvasPositionOfIndex.X * 1.5f + canvasPositionOfIndex.Y + time) * 0.5f + 0.5f;
            Vector4 value3 = Vector4.Lerp(value, value2, amount);
            float dynamicNoise = NoiseHelper.GetDynamicNoise(gridPositionOfIndex.X, gridPositionOfIndex.Y, time / 60f);
            dynamicNoise = Math.Max(0f, 1f - dynamicNoise * 20f);
            dynamicNoise *= 1f - _surfaceColor.X;
            value3 = Vector4.Max(value3, new Vector4(dynamicNoise * _starVisibility));
            fragment.SetColor(i, value3);
        }
    }
}