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#region UsingStatements
using UnityEngine;
using System;
using System.Collections;
#endregion
/// <summary>
/// - Helper class for storing and manipulating Bezier Point data
/// - Ensures that handles are in correct relation to one another
/// - Handles adding/removing self from curve point lists
/// - Calls SetDirty() on curve when edited
/// </summary>
[Serializable]
public class BezierPoint : MonoBehaviour{
#region PublicEnumerations
/// <summary>
/// - Enumeration describing the relationship between a point's handles
/// - Connected : The point's handles are mirrored across the point
/// - Broken : Each handle moves independently of the other
/// - None : This point has no handles (both handles are located ON the point)
/// </summary>
public enum HandleStyle
{
Connected,
Broken,
None,
}
#endregion
#region PublicProperties
/// <summary>
/// - Curve this point belongs to
/// - Changing this value will automatically remove this point from the current curve and add it to the new one
/// </summary>
[SerializeField]
private BezierCurve _curve;
public BezierCurve curve
{
get{return _curve;}
set
{
if(_curve) _curve.RemovePoint(this);
_curve = value;
_curve.AddPoint(this);
}
}
/// <summary>
/// - Value describing the relationship between this point's handles
/// </summary>
public HandleStyle handleStyle;
/// <summary>
/// - Shortcut to transform.position
/// </summary>
/// <value>
/// - The point's world position
/// </value>
public Vector3 position
{
get { return transform.position; }
set { transform.position = value; }
}
/// <summary>
/// - Shortcut to transform.localPosition
/// </summary>
/// <value>
/// - The point's local position.
/// </value>
public Vector3 localPosition
{
get { return transform.localPosition; }
set { transform.localPosition = value; }
}
/// <summary>
/// - Local position of the first handle
/// - Setting this value will cause the curve to become dirty
/// - This handle effects the curve generated from this point and the point proceeding it in curve.points
/// </summary>
[SerializeField]
private Vector3 _handle1;
public Vector3 handle1
{
get { return _handle1; }
set
{
if(_handle1 == value) return;
_handle1 = value;
if(handleStyle == HandleStyle.None) handleStyle = HandleStyle.Broken;
else if(handleStyle == HandleStyle.Connected) _handle2 = -value;
_curve.SetDirty();
}
}
/// <summary>
/// - Global position of the first handle
/// - Ultimately stored in the 'handle1' variable
/// - Setting this value will cause the curve to become dirty
/// - This handle effects the curve generated from this point and the point proceeding it in curve.points
/// </summary>
public Vector3 globalHandle1
{
get{return transform.TransformPoint(handle1);}
set{handle1 = transform.InverseTransformPoint(value);}
}
/// <summary>
/// - Local position of the second handle
/// - Setting this value will cause the curve to become dirty
/// - This handle effects the curve generated from this point and the point coming after it in curve.points
/// </summary>
[SerializeField]
private Vector3 _handle2;
public Vector3 handle2
{
get { return _handle2; }
set
{
if(_handle2 == value) return;
_handle2 = value;
if(handleStyle == HandleStyle.None) handleStyle = HandleStyle.Broken;
else if(handleStyle == HandleStyle.Connected) _handle1 = -value;
_curve.SetDirty();
}
}
/// <summary>
/// - Global position of the second handle
/// - Ultimately stored in the 'handle2' variable
/// - Setting this value will cause the curve to become dirty
/// - This handle effects the curve generated from this point and the point coming after it in curve.points
/// </summary>
public Vector3 globalHandle2
{
get{return transform.TransformPoint(handle2);}
set{handle2 = transform.InverseTransformPoint(value);}
}
#endregion
#region PrivateVariables
/// <summary>
/// - Used to determine if this point has moved since the last frame
/// </summary>
private Vector3 lastPosition;
#endregion
#region MonoBehaviourFunctions
void Update()
{
if(!_curve.dirty && transform.position != lastPosition)
{
_curve.SetDirty();
lastPosition = transform.position;
}
}
#endregion
}
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