Library/PackageCache/com.unity.postprocessing@2.1.6/PostProcessing/Runtime/Effects/LensDistortion.cs

   1 using System;
   2
   3 namespace UnityEngine.Rendering.PostProcessing
   4 {
   5     /// <summary>
   6     /// This class holds settings for the Lens Distortion effect.
   7     /// </summary>
   8     [Serializable]
   9     [PostProcess(typeof(LensDistortionRenderer), "Unity/Lens Distortion")]
  10     public sealed class LensDistortion : PostProcessEffectSettings
  11     {
  12         /// <summary>
  13         /// The total amount of distortion to apply.
  14         /// </summary>
  15         [Range(-100f, 100f), Tooltip("Total distortion amount.")]
  16         public FloatParameter intensity = new FloatParameter { value = 0f };
  17
  18         /// <summary>
  19         /// Multiplies the intensity value on the x-axis. Setting this value to 0 will disable distortion on this axis.
  20         /// </summary>
  21         [Range(0f, 1f), DisplayName("X Multiplier"), Tooltip("Intensity multiplier on the x-axis. Set it to 0 to disable distortion on this axis.")]
  22         public FloatParameter intensityX = new FloatParameter { value = 1f };
  23
  24         /// <summary>
  25         /// Multiplies the intensity value on the y-axis. Setting this value to 0 will disable distortion on this axis.
  26         /// </summary>
  27         [Range(0f, 1f), DisplayName("Y Multiplier"), Tooltip("Intensity multiplier on the y-axis. Set it to 0 to disable distortion on this axis.")]
  28         public FloatParameter intensityY = new FloatParameter { value = 1f };
  29
  30         /// <summary>
  31         /// The center point for the distortion (x-axis).
  32         /// </summary>
  33         [Space]
  34         [Range(-1f, 1f), Tooltip("Distortion center point (x-axis).")]
  35         public FloatParameter centerX = new FloatParameter { value = 0f };
  36
  37         /// <summary>
  38         /// The center point for the distortion (y-axis).
  39         /// </summary>
  40         [Range(-1f, 1f), Tooltip("Distortion center point (y-axis).")]
  41         public FloatParameter centerY = new FloatParameter { value = 0f };
  42
  43         /// <summary>
  44         /// A global screen scaling factor.
  45         /// </summary>
  46         [Space]
  47         [Range(0.01f, 5f), Tooltip("Global screen scaling.")]
  48         public FloatParameter scale = new FloatParameter { value = 1f };
  49
  50         /// <inheritdoc />
  51         public override bool IsEnabledAndSupported(PostProcessRenderContext context)
  52         {
  53             return enabled.value
  54                 && !Mathf.Approximately(intensity, 0f)
  55                 && (intensityX > 0f || intensityY > 0f)
  56                 && !RuntimeUtilities.isVREnabled;
  57         }
  58     }
  59
  60 #if UNITY_2017_1_OR_NEWER
  61     [UnityEngine.Scripting.Preserve]
  62 #endif
  63     internal sealed class LensDistortionRenderer : PostProcessEffectRenderer<LensDistortion>
  64     {
  65         public override void Render(PostProcessRenderContext context)
  66         {
  67             var sheet = context.uberSheet;
  68
  69             float amount = 1.6f * Math.Max(Mathf.Abs(settings.intensity.value), 1f);
  70             float theta = Mathf.Deg2Rad * Math.Min(160f, amount);
  71             float sigma = 2f * Mathf.Tan(theta * 0.5f);
  72             var p0 = new Vector4(settings.centerX.value, settings.centerY.value, Mathf.Max(settings.intensityX.value, 1e-4f), Mathf.Max(settings.intensityY.value, 1e-4f));
  73             var p1 = new Vector4(settings.intensity.value >= 0f ? theta : 1f / theta, sigma, 1f / settings.scale.value, settings.intensity.value);
  74
  75             sheet.EnableKeyword("DISTORT");
  76             sheet.properties.SetVector(ShaderIDs.Distortion_CenterScale, p0);
  77             sheet.properties.SetVector(ShaderIDs.Distortion_Amount, p1);
  78         }
  79     }
  80 }