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refactor: Removed Old PhysicsMath Class

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Syntriax 2024-01-24 12:27:28 +03:00
parent d40183db65
commit fbf9bd5832
1 changed files with 0 additions and 67 deletions
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Engine.Physics2D/PhysicsMath.cs
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using System;
using System.Collections.Generic;
using Syntriax.Engine.Core;
using Syntriax.Engine.Physics2D.Primitives;
namespace Syntriax.Engine.Physics2D;
public static class PhysicsMath
{
// Given three collinear points p, q, r, the function checks if
// point q lies on line segment 'pr'
public static bool OnSegment(Vector2D p, Vector2D q, Vector2D r)
{
if (q.X <= MathF.Max(p.X, r.X) && q.X >= MathF.Min(p.X, r.X) &&
q.Y <= MathF.Max(p.Y, r.Y) && q.Y >= MathF.Min(p.Y, r.Y))
return true;
return false;
}
// To find orientation of ordered triplet (p, q, r).
// The function returns following values
// 0 --> p, q and r are collinear
// 1 --> Clockwise
// 2 --> Counterclockwise
public static int Orientation(Vector2D p, Vector2D q, Vector2D r)
{
// See https://www.geeksforgeeks.org/orientation-3-ordered-points/
// for details of below formula.
float val = (q.Y - p.Y) * (r.X - q.X) -
(q.X - p.X) * (r.Y - q.Y);
if (val == 0) return 0; // collinear
return (val > 0) ? 1 : 2; // clock or counterclock wise
}
public static float IntersectionParameterT(Vector2D p0, Vector2D p1, Vector2D q0, Vector2D q1)
=> ((q0.X - p0.X) * (p1.Y - p0.Y) - (q0.Y - p0.Y) * (p1.X - p0.X)) /
((q1.Y - q0.Y) * (p1.X - p0.X) - (q1.X - q0.X) * (p1.Y - p0.Y));
public static bool ApproximatelyEquals(this float a, float b)
=> ApproximatelyEquals(a, b, float.Epsilon);
public static bool ApproximatelyEquals(this Vector2D a, Vector2D b)
=> ApproximatelyEquals(a, b, float.Epsilon);
public static bool ApproximatelyEquals(this Vector2D a, Vector2D b, float epsilon)
=> ApproximatelyEquals(a.X, b.X, epsilon) && ApproximatelyEquals(a.Y, b.Y, epsilon);
public static bool ApproximatelyEquals(this float a, float b, float epsilon)
{
if (a == b)
return true;
const float floatNormal = (1 << 23) * float.Epsilon;
float absA = MathF.Abs(a);
float absB = MathF.Abs(b);
float diff = MathF.Abs(a - b);
if (a == 0.0f || b == 0.0f || diff < floatNormal)
return diff < (epsilon * floatNormal);
return diff / MathF.Min(absA + absB, float.MaxValue) < epsilon;
}
}