83 lines
3.6 KiB
C#
83 lines
3.6 KiB
C#
using System;
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namespace UnityEngine.Rendering.PostProcessing
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{
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/// <summary>
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/// This class holds settings for the Lens Distortion effect.
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/// </summary>
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[Serializable]
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[PostProcess(typeof(LensDistortionRenderer), "Unity/Lens Distortion")]
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public sealed class LensDistortion : PostProcessEffectSettings
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{
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/// <summary>
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/// The total amount of distortion to apply.
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/// </summary>
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[Range(-100f, 100f), Tooltip("Total distortion amount.")]
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public FloatParameter intensity = new FloatParameter { value = 0f };
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/// <summary>
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/// Multiplies the intensity value on the x-axis. Setting this value to 0 will disable distortion on this axis.
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/// </summary>
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[Range(0f, 1f), DisplayName("X Multiplier"), Tooltip("Intensity multiplier on the x-axis. Set it to 0 to disable distortion on this axis.")]
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public FloatParameter intensityX = new FloatParameter { value = 1f };
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/// <summary>
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/// Multiplies the intensity value on the y-axis. Setting this value to 0 will disable distortion on this axis.
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/// </summary>
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[Range(0f, 1f), DisplayName("Y Multiplier"), Tooltip("Intensity multiplier on the y-axis. Set it to 0 to disable distortion on this axis.")]
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public FloatParameter intensityY = new FloatParameter { value = 1f };
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/// <summary>
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/// The center point for the distortion (x-axis).
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/// </summary>
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[Space]
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[Range(-1f, 1f), Tooltip("Distortion center point (x-axis).")]
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public FloatParameter centerX = new FloatParameter { value = 0f };
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/// <summary>
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/// The center point for the distortion (y-axis).
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/// </summary>
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[Range(-1f, 1f), Tooltip("Distortion center point (y-axis).")]
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public FloatParameter centerY = new FloatParameter { value = 0f };
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/// <summary>
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/// A global screen scaling factor.
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/// </summary>
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[Space]
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[Range(0.01f, 5f), Tooltip("Global screen scaling.")]
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public FloatParameter scale = new FloatParameter { value = 1f };
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/// <summary>
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/// Returns <c>true</c> if the effect is currently enabled and supported.
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/// </summary>
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/// <param name="context">The current post-processing render context</param>
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/// <returns><c>true</c> if the effect is currently enabled and supported</returns>
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public override bool IsEnabledAndSupported(PostProcessRenderContext context)
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{
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return enabled.value
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&& !Mathf.Approximately(intensity, 0f)
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&& (intensityX > 0f || intensityY > 0f)
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&& !context.stereoActive;
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}
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}
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[UnityEngine.Scripting.Preserve]
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internal sealed class LensDistortionRenderer : PostProcessEffectRenderer<LensDistortion>
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{
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public override void Render(PostProcessRenderContext context)
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{
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var sheet = context.uberSheet;
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float amount = 1.6f * Math.Max(Mathf.Abs(settings.intensity.value), 1f);
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float theta = Mathf.Deg2Rad * Math.Min(160f, amount);
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float sigma = 2f * Mathf.Tan(theta * 0.5f);
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var p0 = new Vector4(settings.centerX.value, settings.centerY.value, Mathf.Max(settings.intensityX.value, 1e-4f), Mathf.Max(settings.intensityY.value, 1e-4f));
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var p1 = new Vector4(settings.intensity.value >= 0f ? theta : 1f / theta, sigma, 1f / settings.scale.value, settings.intensity.value);
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sheet.EnableKeyword("DISTORT");
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sheet.properties.SetVector(ShaderIDs.Distortion_CenterScale, p0);
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sheet.properties.SetVector(ShaderIDs.Distortion_Amount, p1);
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}
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}
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}
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