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PointQueryInfo.cs
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PointQueryInfo.cs
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/*
* Copyright (c) 2023 Codefoco (codefoco@codefoco.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
using System;
using System.ComponentModel;
namespace Tizen.NUI.Physics2D.Chipmunk
{
/// <summary>
/// <see cref="PointQueryInfo"/> holds the result of a point query made on a <see cref="Shape"/>
/// or <see cref="Space"/>.
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public sealed class PointQueryInfo : IEquatable<PointQueryInfo>
{
#pragma warning disable IDE0032
private readonly Shape shape;
private readonly Vect point;
private readonly double distance;
private readonly Vect gradient;
#pragma warning restore IDE0032
/// <summary>
/// The nearest shape, None if no shape was within range.
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public Shape Shape => shape;
/// <summary>
/// The closest point on the shape’s surface (in world space coordinates).
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public Vect Point => point;
/// <summary>
/// The distance to the point. The distance is negative if the point is inside the shape.
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public double Distance => distance;
/// <summary>
/// The gradient of the signed distance function.
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public Vect Gradient => gradient;
/// <summary>
/// Create a <see cref="PointQueryInfo"/>.
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public PointQueryInfo(Shape s, Vect p, double d, Vect g)
{
shape = s;
point = p;
distance = d;
gradient = g;
}
/// <summary>
/// Return true if this <see cref="PointQueryInfo"/> object is reference-equal to the given
/// object.
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public override bool Equals(object obj)
{
var other = obj as PointQueryInfo;
if (other == null)
{
return false;
}
return this == other;
}
/// <summary>
/// Get the hash code.
/// </summary>
/// <returns></returns>
[EditorBrowsable(EditorBrowsableState.Never)]
public override int GetHashCode()
{
return shape.Handle.ToInt32() ^
point.GetHashCode() ^
distance.GetHashCode() ^
(gradient.GetHashCode() << 4);
}
/// <summary>
/// Return true if this <see cref="PointQueryInfo"/> object is reference-equal to the given
/// object.
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public static bool operator ==(PointQueryInfo left, PointQueryInfo right)
{
if (ReferenceEquals(left, null))
{
return ReferenceEquals(right, null);
}
return left.Equals(right);
}
/// <summary>
/// Return true if this <see cref="PointQueryInfo"/> object is not reference-equal to the
/// given object.
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public static bool operator !=(PointQueryInfo a, PointQueryInfo b)
{
return !(a == b);
}
internal static PointQueryInfo FromQueryInfo(cpPointQueryInfo queryInfo)
{
var shape = Shape.FromHandle(queryInfo.shape);
return new PointQueryInfo(
shape,
queryInfo.point,
queryInfo.distance,
queryInfo.gradient);
}
/// <summary>
/// Return true if this <see cref="PointQueryInfo"/> object's distance is within
/// <see cref="Single.Epsilon"/> of the other and all other fields are equivalent.
/// </summary>
[EditorBrowsable(EditorBrowsableState.Never)]
public bool Equals(PointQueryInfo other)
{
if (ReferenceEquals(other, null) ||
shape.Handle != other.shape.Handle ||
point != other.point ||
gradient != other.gradient)
{
return false;
}
return Math.Abs(distance - other.distance) < float.Epsilon;
}
}
}