Merged Cake and Abel branched into 2.0.3 (#131)

Co-authored-by: azyges <aaaaaa@aaa.aaa>
Co-authored-by: cake <admin@cakeandbanana.nl>
Co-authored-by: defnotken <itsdefnotken@gmail.com>
Reviewed-on: #131

LightlessSync/ThirdParty/MeshDecimator/Math/Vector4i.cs

@@ -0,0 +1,388 @@
+#region License
+/*
+MIT License
+
+Copyright(c) 2017-2018 Mattias Edlund
+
+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.
+*/
+#endregion
+
+using System;
+using System.Globalization;
+
+namespace MeshDecimator.Math
+{
+    /// <summary>
+    /// A 4D integer vector.
+    /// </summary>
+    public struct Vector4i : IEquatable<Vector4i>
+    {
+        #region Static Read-Only
+        /// <summary>
+        /// The zero vector.
+        /// </summary>
+        public static readonly Vector4i zero = new Vector4i(0, 0, 0, 0);
+        #endregion
+
+        #region Fields
+        /// <summary>
+        /// The x component.
+        /// </summary>
+        public int x;
+        /// <summary>
+        /// The y component.
+        /// </summary>
+        public int y;
+        /// <summary>
+        /// The z component.
+        /// </summary>
+        public int z;
+        /// <summary>
+        /// The w component.
+        /// </summary>
+        public int w;
+        #endregion
+
+        #region Properties
+        /// <summary>
+        /// Gets the magnitude of this vector.
+        /// </summary>
+        public int Magnitude
+        {
+            get { return (int)System.Math.Sqrt(x * x + y * y + z * z + w * w); }
+        }
+
+        /// <summary>
+        /// Gets the squared magnitude of this vector.
+        /// </summary>
+        public int MagnitudeSqr
+        {
+            get { return (x * x + y * y + z * z + w * w); }
+        }
+
+        /// <summary>
+        /// Gets or sets a specific component by index in this vector.
+        /// </summary>
+        /// <param name="index">The component index.</param>
+        public int this[int index]
+        {
+            get
+            {
+                switch (index)
+                {
+                    case 0:
+                        return x;
+                    case 1:
+                        return y;
+                    case 2:
+                        return z;
+                    case 3:
+                        return w;
+                    default:
+                        throw new IndexOutOfRangeException("Invalid Vector4i index!");
+                }
+            }
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        x = value;
+                        break;
+                    case 1:
+                        y = value;
+                        break;
+                    case 2:
+                        z = value;
+                        break;
+                    case 3:
+                        w = value;
+                        break;
+                    default:
+                        throw new IndexOutOfRangeException("Invalid Vector4i index!");
+                }
+            }
+        }
+        #endregion
+
+        #region Constructor
+        /// <summary>
+        /// Creates a new vector with one value for all components.
+        /// </summary>
+        /// <param name="value">The value.</param>
+        public Vector4i(int value)
+        {
+            this.x = value;
+            this.y = value;
+            this.z = value;
+            this.w = value;
+        }
+
+        /// <summary>
+        /// Creates a new vector.
+        /// </summary>
+        /// <param name="x">The x value.</param>
+        /// <param name="y">The y value.</param>
+        /// <param name="z">The z value.</param>
+        /// <param name="w">The w value.</param>
+        public Vector4i(int x, int y, int z, int w)
+        {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+            this.w = w;
+        }
+        #endregion
+
+        #region Operators
+        /// <summary>
+        /// Adds two vectors.
+        /// </summary>
+        /// <param name="a">The first vector.</param>
+        /// <param name="b">The second vector.</param>
+        /// <returns>The resulting vector.</returns>
+        public static Vector4i operator +(Vector4i a, Vector4i b)
+        {
+            return new Vector4i(a.x + b.x, a.y + b.y, a.z + b.z, a.w + b.w);
+        }
+
+        /// <summary>
+        /// Subtracts two vectors.
+        /// </summary>
+        /// <param name="a">The first vector.</param>
+        /// <param name="b">The second vector.</param>
+        /// <returns>The resulting vector.</returns>
+        public static Vector4i operator -(Vector4i a, Vector4i b)
+        {
+            return new Vector4i(a.x - b.x, a.y - b.y, a.z - b.z, a.w - b.w);
+        }
+
+        /// <summary>
+        /// Scales the vector uniformly.
+        /// </summary>
+        /// <param name="a">The vector.</param>
+        /// <param name="d">The scaling value.</param>
+        /// <returns>The resulting vector.</returns>
+        public static Vector4i operator *(Vector4i a, int d)
+        {
+            return new Vector4i(a.x * d, a.y * d, a.z * d, a.w * d);
+        }
+
+        /// <summary>
+        /// Scales the vector uniformly.
+        /// </summary>
+        /// <param name="d">The scaling value.</param>
+        /// <param name="a">The vector.</param>
+        /// <returns>The resulting vector.</returns>
+        public static Vector4i operator *(int d, Vector4i a)
+        {
+            return new Vector4i(a.x * d, a.y * d, a.z * d, a.w * d);
+        }
+
+        /// <summary>
+        /// Divides the vector with a float.
+        /// </summary>
+        /// <param name="a">The vector.</param>
+        /// <param name="d">The dividing float value.</param>
+        /// <returns>The resulting vector.</returns>
+        public static Vector4i operator /(Vector4i a, int d)
+        {
+            return new Vector4i(a.x / d, a.y / d, a.z / d, a.w / d);
+        }
+
+        /// <summary>
+        /// Subtracts the vector from a zero vector.
+        /// </summary>
+        /// <param name="a">The vector.</param>
+        /// <returns>The resulting vector.</returns>
+        public static Vector4i operator -(Vector4i a)
+        {
+            return new Vector4i(-a.x, -a.y, -a.z, -a.w);
+        }
+
+        /// <summary>
+        /// Returns if two vectors equals eachother.
+        /// </summary>
+        /// <param name="lhs">The left hand side vector.</param>
+        /// <param name="rhs">The right hand side vector.</param>
+        /// <returns>If equals.</returns>
+        public static bool operator ==(Vector4i lhs, Vector4i rhs)
+        {
+            return (lhs.x == rhs.x && lhs.y == rhs.y && lhs.z == rhs.z && lhs.w == rhs.w);
+        }
+
+        /// <summary>
+        /// Returns if two vectors don't equal eachother.
+        /// </summary>
+        /// <param name="lhs">The left hand side vector.</param>
+        /// <param name="rhs">The right hand side vector.</param>
+        /// <returns>If not equals.</returns>
+        public static bool operator !=(Vector4i lhs, Vector4i rhs)
+        {
+            return (lhs.x != rhs.x || lhs.y != rhs.y || lhs.z != rhs.z || lhs.w != rhs.w);
+        }
+
+        /// <summary>
+        /// Explicitly converts from a single-precision vector into an integer vector.
+        /// </summary>
+        /// <param name="v">The single-precision vector.</param>
+        public static explicit operator Vector4i(Vector4 v)
+        {
+            return new Vector4i((int)v.x, (int)v.y, (int)v.z, (int)v.w);
+        }
+
+        /// <summary>
+        /// Explicitly converts from a double-precision vector into an integer vector.
+        /// </summary>
+        /// <param name="v">The double-precision vector.</param>
+        public static explicit operator Vector4i(Vector4d v)
+        {
+            return new Vector4i((int)v.x, (int)v.y, (int)v.z, (int)v.w);
+        }
+        #endregion
+
+        #region Public Methods
+        #region Instance
+        /// <summary>
+        /// Set x, y and z components of an existing vector.
+        /// </summary>
+        /// <param name="x">The x value.</param>
+        /// <param name="y">The y value.</param>
+        /// <param name="z">The z value.</param>
+        /// <param name="w">The w value.</param>
+        public void Set(int x, int y, int z, int w)
+        {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+            this.w = w;
+        }
+
+        /// <summary>
+        /// Multiplies with another vector component-wise.
+        /// </summary>
+        /// <param name="scale">The vector to multiply with.</param>
+        public void Scale(ref Vector4i scale)
+        {
+            x *= scale.x;
+            y *= scale.y;
+            z *= scale.z;
+            w *= scale.w;
+        }
+
+        /// <summary>
+        /// Clamps this vector between a specific range.
+        /// </summary>
+        /// <param name="min">The minimum component value.</param>
+        /// <param name="max">The maximum component value.</param>
+        public void Clamp(int min, int max)
+        {
+            if (x < min) x = min;
+            else if (x > max) x = max;
+
+            if (y < min) y = min;
+            else if (y > max) y = max;
+
+            if (z < min) z = min;
+            else if (z > max) z = max;
+
+            if (w < min) w = min;
+            else if (w > max) w = max;
+        }
+        #endregion
+
+        #region Object
+        /// <summary>
+        /// Returns a hash code for this vector.
+        /// </summary>
+        /// <returns>The hash code.</returns>
+        public override int GetHashCode()
+        {
+            return x.GetHashCode() ^ y.GetHashCode() << 2 ^ z.GetHashCode() >> 2 ^ w.GetHashCode() >> 1;
+        }
+
+        /// <summary>
+        /// Returns if this vector is equal to another one.
+        /// </summary>
+        /// <param name="other">The other vector to compare to.</param>
+        /// <returns>If equals.</returns>
+        public override bool Equals(object other)
+        {
+            if (!(other is Vector4i))
+            {
+                return false;
+            }
+            Vector4i vector = (Vector4i)other;
+            return (x == vector.x && y == vector.y && z == vector.z && w == vector.w);
+        }
+
+        /// <summary>
+        /// Returns if this vector is equal to another one.
+        /// </summary>
+        /// <param name="other">The other vector to compare to.</param>
+        /// <returns>If equals.</returns>
+        public bool Equals(Vector4i other)
+        {
+            return (x == other.x && y == other.y && z == other.z && w == other.w);
+        }
+
+        /// <summary>
+        /// Returns a nicely formatted string for this vector.
+        /// </summary>
+        /// <returns>The string.</returns>
+        public override string ToString()
+        {
+            return string.Format("({0}, {1}, {2}, {3})",
+                x.ToString(CultureInfo.InvariantCulture),
+                y.ToString(CultureInfo.InvariantCulture),
+                z.ToString(CultureInfo.InvariantCulture),
+                w.ToString(CultureInfo.InvariantCulture));
+        }
+
+        /// <summary>
+        /// Returns a nicely formatted string for this vector.
+        /// </summary>
+        /// <param name="format">The integer format.</param>
+        /// <returns>The string.</returns>
+        public string ToString(string format)
+        {
+            return string.Format("({0}, {1}, {2}, {3})",
+                x.ToString(format, CultureInfo.InvariantCulture),
+                y.ToString(format, CultureInfo.InvariantCulture),
+                z.ToString(format, CultureInfo.InvariantCulture),
+                w.ToString(format, CultureInfo.InvariantCulture));
+        }
+        #endregion
+
+        #region Static
+        /// <summary>
+        /// Multiplies two vectors component-wise.
+        /// </summary>
+        /// <param name="a">The first vector.</param>
+        /// <param name="b">The second vector.</param>
+        /// <param name="result">The resulting vector.</param>
+        public static void Scale(ref Vector4i a, ref Vector4i b, out Vector4i result)
+        {
+            result = new Vector4i(a.x * b.x, a.y * b.y, a.z * b.z, a.w * b.w);
+        }
+        #endregion
+        #endregion
+    }
+}