Mindgames/Library/PackageCache/com.unity.render-pipelines.core@6.9.0/Editor/LookDev/ComparisonGizmoState.cs

   1 using System;
   2 using UnityEditor.AnimatedValues;
   3 using UnityEngine;
   4
   5 namespace UnityEditor.Rendering.Experimental.LookDev
   6 {
   7     [Serializable]
   8     public class ComparisonGizmoState
   9     {
  10         public const float thickness = 0.0028f;
  11         public const float thicknessSelected = 0.015f;
  12         public const float circleRadius = 0.014f;
  13         public const float circleRadiusSelected = 0.03f;
  14         public const float blendFactorCircleRadius = 0.01f;
  15         public const float blendFactorCircleRadiusSelected = 0.03f;
  16
  17         public Vector2 point1 { get; private set; }
  18         public Vector2 point2 { get; private set; }
  19         [field: SerializeField]
  20         public Vector2 center { get; private set; } = Vector2.zero;
  21         [field: SerializeField]
  22         public float angle { get; private set; }
  23         [field: SerializeField]
  24         public float length { get; private set; } = 0.2f;
  25         public Vector4 plane { get; private set; }
  26         public Vector4 planeOrtho { get; private set; }
  27         [field: SerializeField]
  28         public float blendFactor { get; set; }
  29
  30         public float blendFactorMaxGizmoDistance
  31             => length - circleRadius - blendFactorCircleRadius;
  32
  33         public float blendFactorMinGizmoDistance
  34             => length - circleRadius - blendFactorCircleRadiusSelected;
  35
  36         internal void Init()
  37             => Update(center, length, angle);
  38
  39         //TODO: optimize
  40         private Vector4 Get2DPlane(Vector2 firstPoint, float angle)
  41         {
  42             Vector4 result = new Vector4();
  43             angle = angle % (2.0f * (float)Math.PI);
  44             Vector2 secondPoint = new Vector2(firstPoint.x + Mathf.Sin(angle), firstPoint.y + Mathf.Cos(angle));
  45             Vector2 diff = secondPoint - firstPoint;
  46             if (Mathf.Abs(diff.x) < 1e-5)
  47             {
  48                 result.Set(-1.0f, 0.0f, firstPoint.x, 0.0f);
  49                 float sign = Mathf.Cos(angle) > 0.0f ? 1.0f : -1.0f;
  50                 result *= sign;
  51             }
  52             else
  53             {
  54                 float slope = diff.y / diff.x;
  55                 result.Set(-slope, 1.0f, -(firstPoint.y - slope * firstPoint.x), 0.0f);
  56             }
  57
  58             if (angle > Mathf.PI)
  59                 result = -result;
  60
  61             float length = Mathf.Sqrt(result.x * result.x + result.y * result.y);
  62             result = result / length;
  63             return result;
  64         }
  65
  66         public void Update(Vector2 point1, Vector2 point2)
  67         {
  68             this.point1 = point1;
  69             this.point2 = point2;
  70             center = (point1 + point2) * 0.5f;
  71             length = (point2 - point1).magnitude * 0.5f;
  72
  73             Vector3 verticalPlane = Get2DPlane(center, 0.0f);
  74             float side = Vector3.Dot(new Vector3(point1.x, point1.y, 1.0f), verticalPlane);
  75             angle = (Mathf.Deg2Rad * Vector2.Angle(new Vector2(0.0f, 1.0f), (point1 - point2).normalized));
  76             if (side > 0.0f)
  77                 angle = 2.0f * Mathf.PI - angle;
  78
  79             plane = Get2DPlane(center, angle);
  80             planeOrtho = Get2DPlane(center, angle + 0.5f * (float)Mathf.PI);
  81         }
  82
  83         public void Update(Vector2 center, float length, float angle)
  84         {
  85             this.center = center;
  86             this.length = length;
  87             this.angle = angle;
  88
  89             plane = Get2DPlane(center, angle);
  90             planeOrtho = Get2DPlane(center, angle + 0.5f * (float)Mathf.PI);
  91
  92             Vector2 dir = new Vector2(planeOrtho.x, planeOrtho.y);
  93             point1 = center + dir * length;
  94             point2 = center - dir * length;
  95         }
  96     }
  97 }