Added mono module

1 files changed, 328 insertions, 0 deletions

diff --git a/modules/mono/glue/cs_files/Quat.cs b/modules/mono/glue/cs_files/Quat.cs
new file mode 100644
index 0000000000..6345239f47
--- /dev/null
+++ b/modules/mono/glue/cs_files/Quat.cs
@@ -0,0 +1,328 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Godot
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Quat : IEquatable<Quat>
+    {
+        private static readonly Quat identity = new Quat(0f, 0f, 0f, 1f);
+
+        public float x;
+        public float y;
+        public float z;
+        public float w;
+
+        public static Quat Identity
+        {
+            get { return identity; }
+        }
+
+        public float 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();
+                }
+            }
+            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();
+                }
+            }
+        }
+
+        public Quat cubic_slerp(Quat b, Quat preA, Quat postB, float t)
+        {
+            float t2 = (1.0f - t) * t * 2f;
+            Quat sp = slerp(b, t);
+            Quat sq = preA.slerpni(postB, t);
+            return sp.slerpni(sq, t2);
+        }
+
+        public float dot(Quat b)
+        {
+            return x * b.x + y * b.y + z * b.z + w * b.w;
+        }
+
+        public Quat inverse()
+        {
+            return new Quat(-x, -y, -z, w);
+        }
+
+        public float length()
+        {
+            return Mathf.sqrt(length_squared());
+        }
+
+        public float length_squared()
+        {
+            return dot(this);
+        }
+
+        public Quat normalized()
+        {
+            return this / length();
+        }
+
+        public void set(float x, float y, float z, float w)
+        {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+            this.w = w;
+        }
+
+        public Quat slerp(Quat b, float t)
+        {
+            // Calculate cosine
+            float cosom = x * b.x + y * b.y + z * b.z + w * b.w;
+
+            float[] to1 = new float[4];
+
+            // Adjust signs if necessary
+            if (cosom < 0.0)
+            {
+                cosom = -cosom; to1[0] = -b.x;
+                to1[1] = -b.y;
+                to1[2] = -b.z;
+                to1[3] = -b.w;
+            }
+            else
+            {
+                to1[0] = b.x;
+                to1[1] = b.y;
+                to1[2] = b.z;
+                to1[3] = b.w;
+            }
+
+            float sinom, scale0, scale1;
+
+            // Calculate coefficients
+            if ((1.0 - cosom) > Mathf.Epsilon)
+            {
+                // Standard case (Slerp)
+                float omega = Mathf.acos(cosom);
+                sinom = Mathf.sin(omega);
+                scale0 = Mathf.sin((1.0f - t) * omega) / sinom;
+                scale1 = Mathf.sin(t * omega) / sinom;
+            }
+            else
+            {
+                // Quaternions are very close so we can do a linear interpolation
+                scale0 = 1.0f - t;
+                scale1 = t;
+            }
+
+            // Calculate final values
+            return new Quat
+            (
+                scale0 * x + scale1 * to1[0],
+                scale0 * y + scale1 * to1[1],
+                scale0 * z + scale1 * to1[2],
+                scale0 * w + scale1 * to1[3]
+            );
+        }
+
+        public Quat slerpni(Quat b, float t)
+        {
+            float dot = this.dot(b);
+
+            if (Mathf.abs(dot) > 0.9999f)
+            {
+                return this;
+            }
+
+            float theta = Mathf.acos(dot);
+            float sinT = 1.0f / Mathf.sin(theta);
+            float newFactor = Mathf.sin(t * theta) * sinT;
+            float invFactor = Mathf.sin((1.0f - t) * theta) * sinT;
+
+            return new Quat
+            (
+                invFactor * this.x + newFactor * b.x,
+                invFactor * this.y + newFactor * b.y,
+                invFactor * this.z + newFactor * b.z,
+                invFactor * this.w + newFactor * b.w
+            );
+        }
+
+        public Vector3 xform(Vector3 v)
+        {
+            Quat q = this * v;
+            q *= this.inverse();
+            return new Vector3(q.x, q.y, q.z);
+        }
+
+        public Quat(float x, float y, float z, float w)
+        {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+            this.w = w;
+        }
+
+        public Quat(Vector3 axis, float angle)
+        {
+            float d = axis.length();
+
+            if (d == 0f)
+            {
+                x = 0f;
+                y = 0f;
+                z = 0f;
+                w = 0f;
+            }
+            else
+            {
+                float s = Mathf.sin(-angle * 0.5f) / d;
+
+                x = axis.x * s;
+                y = axis.y * s;
+                z = axis.z * s;
+                w = Mathf.cos(-angle * 0.5f);
+            }
+        }
+
+        public static Quat operator *(Quat left, Quat right)
+        {
+            return new Quat
+            (
+                left.w * right.x + left.x * right.w + left.y * right.z - left.z * right.y,
+                left.w * right.y + left.y * right.w + left.z * right.x - left.x * right.z,
+                left.w * right.z + left.z * right.w + left.x * right.y - left.y * right.x,
+                left.w * right.w - left.x * right.x - left.y * right.y - left.z * right.z
+            );
+        }
+
+        public static Quat operator +(Quat left, Quat right)
+        {
+            return new Quat(left.x + right.x, left.y + right.y, left.z + right.z, left.w + right.w);
+        }
+
+        public static Quat operator -(Quat left, Quat right)
+        {
+            return new Quat(left.x - right.x, left.y - right.y, left.z - right.z, left.w - right.w);
+        }
+
+        public static Quat operator -(Quat left)
+        {
+            return new Quat(-left.x, -left.y, -left.z, -left.w);
+        }
+
+        public static Quat operator *(Quat left, Vector3 right)
+        {
+            return new Quat
+            (
+                left.w * right.x + left.y * right.z - left.z * right.y,
+                left.w * right.y + left.z * right.x - left.x * right.z,
+                left.w * right.z + left.x * right.y - left.y * right.x,
+                -left.x * right.x - left.y * right.y - left.z * right.z
+            );
+        }
+
+        public static Quat operator *(Vector3 left, Quat right)
+        {
+            return new Quat
+            (
+                right.w * left.x + right.y * left.z - right.z * left.y,
+                right.w * left.y + right.z * left.x - right.x * left.z,
+                right.w * left.z + right.x * left.y - right.y * left.x,
+                -right.x * left.x - right.y * left.y - right.z * left.z
+            );
+        }
+
+        public static Quat operator *(Quat left, float right)
+        {
+            return new Quat(left.x * right, left.y * right, left.z * right, left.w * right);
+        }
+
+        public static Quat operator *(float left, Quat right)
+        {
+            return new Quat(right.x * left, right.y * left, right.z * left, right.w * left);
+        }
+
+        public static Quat operator /(Quat left, float right)
+        {
+            return left * (1.0f / right);
+        }
+
+        public static bool operator ==(Quat left, Quat right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Quat left, Quat right)
+        {
+            return !left.Equals(right);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Vector2)
+            {
+                return Equals((Vector2)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Quat other)
+        {
+            return x == other.x && y == other.y && z == other.z && w == other.w;
+        }
+
+        public override int GetHashCode()
+        {
+            return y.GetHashCode() ^ x.GetHashCode() ^ z.GetHashCode() ^ w.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("({0}, {1}, {2}, {3})", new object[]
+            {
+                this.x.ToString(),
+                this.y.ToString(),
+                this.z.ToString(),
+                this.w.ToString()
+            });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("({0}, {1}, {2}, {3})", new object[]
+            {
+                this.x.ToString(format),
+                this.y.ToString(format),
+                this.z.ToString(format),
+                this.w.ToString(format)
+            });
+        }
+    }
+}