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AbstractConcept 2022-09-13 00:36:34 -05:00
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Library/PackageCache/com.unity.2d.spriteshape@3.0.14/Samples~/Extras/Scripts/LegacyCollider.cs Normal file
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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.U2D;
using ExtrasClipperLib;
#if UNITY_EDITOR
using UnityEditor;
#endif
public enum ColliderCornerType
{
Square,
Round,
Sharp
}
[ExecuteAlways]
public class LegacyCollider : MonoBehaviour
{
[SerializeField]
ColliderCornerType m_ColliderCornerType = ColliderCornerType.Square;
[SerializeField]
float m_ColliderOffset = 1.0f;
[SerializeField]
bool m_UpdateCollider = false;
const float s_ClipperScale = 100000.0f;
int m_HashCode = 0;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
if (m_UpdateCollider)
Bake(gameObject, false);
}
static void SampleCurve(float colliderDetail, Vector3 startPoint, Vector3 startTangent, Vector3 endPoint, Vector3 endTangent, ref List<IntPoint> path)
{
if (startTangent.sqrMagnitude > 0f || endTangent.sqrMagnitude > 0f)
{
for (int j = 0; j <= colliderDetail; ++j)
{
float t = j / (float)colliderDetail;
Vector3 newPoint = BezierUtility.BezierPoint(startPoint, startTangent + startPoint, endTangent + endPoint, endPoint, t) * s_ClipperScale;
path.Add(new IntPoint((System.Int64)newPoint.x, (System.Int64)newPoint.y));
}
}
else
{
Vector3 newPoint = startPoint * s_ClipperScale;
path.Add(new IntPoint((System.Int64)newPoint.x, (System.Int64)newPoint.y));
newPoint = endPoint * s_ClipperScale;
path.Add(new IntPoint((System.Int64)newPoint.x, (System.Int64)newPoint.y));
}
}
public static void Bake(GameObject go, bool forced)
{
var sc = go.GetComponent<SpriteShapeController>();
var lc = go.GetComponent<LegacyCollider>();
if (sc != null)
{
List<IntPoint> path = new List<IntPoint>();
int splinePointCount = sc.spline.GetPointCount();
int pathPointCount = splinePointCount;
ColliderCornerType cct = ColliderCornerType.Square;
float co = 1.0f;
if (lc != null)
{
int hashCode = sc.spline.GetHashCode() + lc.m_ColliderCornerType.GetHashCode() + lc.m_ColliderOffset.GetHashCode();
if (lc.m_HashCode == hashCode && !forced)
return;
lc.m_HashCode = hashCode;
cct = lc.m_ColliderCornerType;
co = lc.m_ColliderOffset;
}
if (sc.spline.isOpenEnded)
pathPointCount--;
for (int i = 0; i < pathPointCount; ++i)
{
int nextIndex = SplineUtility.NextIndex(i, splinePointCount);
SampleCurve(sc.colliderDetail, sc.spline.GetPosition(i), sc.spline.GetRightTangent(i), sc.spline.GetPosition(nextIndex), sc.spline.GetLeftTangent(nextIndex), ref path);
}
if (co != 0f)
{
List<List<IntPoint>> solution = new List<List<IntPoint>>();
ClipperOffset clipOffset = new ClipperOffset();
EndType endType = EndType.etClosedPolygon;
if (sc.spline.isOpenEnded)
{
endType = EndType.etOpenSquare;
if (cct == ColliderCornerType.Round)
endType = EndType.etOpenRound;
}
clipOffset.ArcTolerance = 200f / sc.colliderDetail;
clipOffset.AddPath(path, (ExtrasClipperLib.JoinType)cct, endType);
clipOffset.Execute(ref solution, s_ClipperScale * co);
if (solution.Count > 0)
path = solution[0];
}
List<Vector2> pathPoints = new List<Vector2>(path.Count);
for (int i = 0; i < path.Count; ++i)
{
IntPoint ip = path[i];
pathPoints.Add(new Vector2(ip.X / s_ClipperScale, ip.Y / s_ClipperScale));
}
var pc = go.GetComponent<PolygonCollider2D>();
if (pc)
{
pc.pathCount = 0;
pc.SetPath(0, pathPoints.ToArray());
}
var ec = go.GetComponent<EdgeCollider2D>();
if (ec)
{
if (co > 0f || co < 0f && !sc.spline.isOpenEnded)
pathPoints.Add(pathPoints[0]);
ec.points = pathPoints.ToArray();
}
}
}
#if UNITY_EDITOR
[MenuItem("SpriteShape/Generate Legacy Collider", false, 358)]
public static void BakeLegacyCollider()
{
if (Selection.activeGameObject != null)
LegacyCollider.Bake(Selection.activeGameObject, true);
}
#endif
}