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116 lines
3.4 KiB
C#
116 lines
3.4 KiB
C#
/******************************************************************************/
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/*
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Project - MudBun
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Publisher - Long Bunny Labs
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http://LongBunnyLabs.com
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Author - Ming-Lun "Allen" Chou
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http://AllenChou.net
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*/
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/******************************************************************************/
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using System.Collections.Generic;
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using Unity.Collections;
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using UnityEngine;
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#if MUDBUN_BURST
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using Unity.Burst;
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using Unity.Mathematics;
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using AOT;
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#endif
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namespace MudBun
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{
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#if MUDBUN_BURST
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[BurstCompile]
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#endif
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public class MudTwist : MudDistortion
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{
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[SerializeField] private float m_radius = 0.5f;
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public float Radius { get => m_radius; set { m_radius = value; MarkDirty(); } }
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[SerializeField] private float m_angle = 90.0f;
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public float Angle { get => m_angle; set { m_angle = value; MarkDirty(); } }
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[SerializeField] [Range(1.0f, 5.0f)] private float m_strength = 1.0f;
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public float Strength { get => m_strength; set { m_strength = value; MarkDirty(); } }
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public override float MaxDistortion =>
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2.0f * Mathf.Sin(0.5f * Mathf.Min(MathUtil.Pi, Mathf.Abs(m_angle * MathUtil.Deg2Rad))) * m_radius;
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public override Aabb RawBoundsRs
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{
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get
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{
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Vector3 posRs = PointRs(transform.position);
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Vector3 size = VectorUtil.Abs(transform.localScale);
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Vector3 r = new Vector3(m_radius, 0.5f * size.y, m_radius);
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Aabb bounds = new Aabb(-r, r);
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bounds.Rotate(RotationRs(transform.rotation));
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bounds.Min += posRs;
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bounds.Max += posRs;
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return bounds;
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}
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}
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public override void SanitizeParameters()
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{
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base.SanitizeParameters();
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Validate.NonNegative(ref m_radius);
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}
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public override int FillComputeData(NativeArray<SdfBrush> aBrush, int iStart, List<Transform> aBone)
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{
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SdfBrush brush = SdfBrush.New();
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brush.Type = (int) SdfBrush.TypeEnum.Twist;
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brush.Radius = m_radius;
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brush.Data0.x = m_angle * MathUtil.Deg2Rad;
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brush.Data0.y = m_strength;
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aBrush[iStart] = brush;
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return 1;
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}
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#if MUDBUN_BURST
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[BurstCompile]
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[MonoPInvokeCallback(typeof(Sdf.SdfBrushEvalFunc))]
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[RegisterSdfBrushEvalFunc(SdfBrush.TypeEnum.Twist)]
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public static unsafe float EvaluateSdf(float res, ref float3 p, in float3 pRel, SdfBrush* aBrush, int iBrush)
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{
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float3 pRelCopy = pRel;
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float3 h = math.abs(0.5f * aBrush[iBrush].Size);
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if (Sdf.Cylinder(pRelCopy, h.y, aBrush[iBrush].Radius, 0.0f) > 0.0f)
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return res;
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float angle = aBrush[iBrush].Data0.x;
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float strength = aBrush[iBrush].Data0.y;
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float r = math.length(pRelCopy.xz);
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float t = r / aBrush[iBrush].Radius;
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float a = angle * (1.0f - math.pow(math.abs(t), strength));
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float s = math.sin(a);
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float c = math.cos(a);
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pRelCopy.xz = math.mul(new float2x2(c, -s, s, c), pRelCopy.xz);
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p = new float3(aBrush[iBrush].Rotation * pRelCopy + aBrush[iBrush].Position);
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return res;
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}
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#endif
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public override void DrawSelectionGizmosRs()
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{
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base.DrawSelectionGizmosRs();
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GizmosUtil.DrawInvisibleCylinder(PointRs(transform.position), m_radius, transform.localScale.y, RotationRs(transform.rotation));
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}
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public override void DrawOutlineGizmosRs()
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{
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base.DrawOutlineGizmosRs();
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GizmosUtil.DrawWireCylinder(PointRs(transform.position), m_radius, 0.0f, transform.localScale.y, RotationRs(transform.rotation));
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}
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}
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}
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