*init

49 files changed, 2312 insertions, 0 deletions

diff --git a/Box2d/Assets/Program.meta b/Box2d/Assets/Program.meta
new file mode 100644
index 0000000..619aa21
--- /dev/null
+++ b/Box2d/Assets/Program.meta
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diff --git a/Box2d/Assets/Program/Box2d.meta b/Box2d/Assets/Program/Box2d.meta
new file mode 100644
index 0000000..b188c26
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d.meta
@@ -0,0 +1,8 @@
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diff --git a/Box2d/Assets/Program/Box2d/Box2d.cs b/Box2d/Assets/Program/Box2d/Box2d.cs
new file mode 100644
index 0000000..308a02a
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Box2d.cs
@@ -0,0 +1,10 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Box2d
+{
+    ///////////////////////////////////
+    // Box2d C# port
+    // author: chai
+    ///////////////////////////////////
+}
diff --git a/Box2d/Assets/Program/Box2d/Box2d.cs.meta b/Box2d/Assets/Program/Box2d/Box2d.cs.meta
new file mode 100644
index 0000000..3e25ab6
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Box2d.cs.meta
@@ -0,0 +1,11 @@
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diff --git a/Box2d/Assets/Program/Box2d/Collision.meta b/Box2d/Assets/Program/Box2d/Collision.meta
new file mode 100644
index 0000000..245ceea
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Collision.meta
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diff --git a/Box2d/Assets/Program/Box2d/Collision/Collision.cs b/Box2d/Assets/Program/Box2d/Collision/Collision.cs
new file mode 100644
index 0000000..5b8a47a
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Collision/Collision.cs
@@ -0,0 +1,7 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Box2d
+{
+
+}
diff --git a/Box2d/Assets/Program/Box2d/Collision/Collision.cs.meta b/Box2d/Assets/Program/Box2d/Collision/Collision.cs.meta
new file mode 100644
index 0000000..f6efab1
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+++ b/Box2d/Assets/Program/Box2d/Collision/Collision.cs.meta
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diff --git a/Box2d/Assets/Program/Box2d/Collision/Shapes.meta b/Box2d/Assets/Program/Box2d/Collision/Shapes.meta
new file mode 100644
index 0000000..8dba44f
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Collision/Shapes.meta
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diff --git a/Box2d/Assets/Program/Box2d/Collision/Shapes/PolygonShape.cs b/Box2d/Assets/Program/Box2d/Collision/Shapes/PolygonShape.cs
new file mode 100644
index 0000000..5b8a47a
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Collision/Shapes/PolygonShape.cs
@@ -0,0 +1,7 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Box2d
+{
+
+}
diff --git a/Box2d/Assets/Program/Box2d/Collision/Shapes/PolygonShape.cs.meta b/Box2d/Assets/Program/Box2d/Collision/Shapes/PolygonShape.cs.meta
new file mode 100644
index 0000000..f9c2740
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+++ b/Box2d/Assets/Program/Box2d/Collision/Shapes/PolygonShape.cs.meta
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diff --git a/Box2d/Assets/Program/Box2d/Common.meta b/Box2d/Assets/Program/Box2d/Common.meta
new file mode 100644
index 0000000..af0e496
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Common.meta
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diff --git a/Box2d/Assets/Program/Box2d/Common/Mat22.cs b/Box2d/Assets/Program/Box2d/Common/Mat22.cs
new file mode 100644
index 0000000..0da59dd
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Common/Mat22.cs
@@ -0,0 +1,81 @@
+using System;
+
+namespace Box2d
+{
+    class Mat22
+    {
+        public Mat22()
+        {
+        }
+
+        public Mat22(Vec2 c1, Vec2 c2)
+        {
+            col1.Set(c1);
+            col2.Set(c2);
+        }
+
+        public Mat22(float a11, float a12, float a21, float a22)
+        {
+            col1.x = a11; col1.y = a21;
+            col2.x = a12; col2.y = a22;
+        }
+
+        public void Set(Vec2 c1, Vec2 c2)
+        {
+            col1.Set(c1);
+            col2.Set(c2);
+        }
+
+        void SetIdentity()
+        {
+            col1.x = 1.0f; col2.x = 0.0f;
+            col1.y = 0.0f; col2.y = 1.0f;
+        }
+
+        void SetZero()
+        {
+            col1.Set(0, 0);
+            col2.Set(0, 0);
+        }
+
+        public float GetAngle()
+        {
+            return Convert.ToSingle(System.Math.Atan2(col1.y, col1.x));
+        }
+
+        /// <summary>
+        /// Compute the inverse of this matrix, such that inv(A) * A = identity.
+        /// </summary>
+        /// <returns></returns>
+        public Mat22 GetInverse()
+        {
+            float a = col1.x;
+            float b = col2.x;
+            float c = col1.y;
+            float d = col2.y;
+            float det = a * d - b * c;
+            if(det != 0.0)
+            {
+                det = 1 / det;
+            }
+            Mat22 m = new Mat22();
+            m.col1.x = det * d; m.col2.x = -det * b;
+            m.col1.y = -det * c; m.col2.y = det * a;
+            return m;
+        }
+
+        public Vec2 Solve()
+        {
+
+        }
+
+        /*
+         * col1.x         col2.x
+         * 
+         * 
+         * col1.y         col2.y
+         */
+        Vec2 col1 = new Vec2();
+        Vec2 col2 = new Vec2();
+    }
+}
diff --git a/Box2d/Assets/Program/Box2d/Common/Math.cs b/Box2d/Assets/Program/Box2d/Common/Math.cs
new file mode 100644
index 0000000..aece85a
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Common/Math.cs
@@ -0,0 +1,33 @@
+using System;
+
+namespace Box2d
+{
+
+    /// <summary>
+    /// common functions
+    /// </summary>
+    class Math
+    {
+        /// This function is used to ensure that a floating point number is not a NaN or infinity.
+        public static bool IsValid(float x)
+        {
+            return x != float.PositiveInfinity
+                && x != float.NaN
+                && x != float.NegativeInfinity;
+        }
+
+        /// This is a approximate yet fast inverse square-root.
+        public static float InvSqrt(float x)
+        {
+            //float xhalf = 0.5f * x;
+            //int i = BitConverter.ToInt32(BitConverter.GetBytes(x), 0);
+            //i = 0x5f3759df - (i >> 1);
+            //x = BitConverter.ToSingle(BitConverter.GetBytes(i), 0);
+            //x = x * (1.5f - xhalf * x * x);
+            //return x;
+            return Convert.ToSingle(1 / System.Math.Sqrt(x));
+        }
+
+    }
+
+}
diff --git a/Box2d/Assets/Program/Box2d/Common/Vec2.cs b/Box2d/Assets/Program/Box2d/Common/Vec2.cs
new file mode 100644
index 0000000..01f215c
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Common/Vec2.cs
@@ -0,0 +1,92 @@
+using System;
+
+namespace Box2d
+{
+    class Vec2
+    {
+        public Vec2(float x, float y)
+        {
+            this.x = x;
+            this.y = y;
+        }
+
+        public Vec2()
+        {
+            this.x = 0;
+            this.y = 0;
+        }
+
+        public void SetZero()
+        {
+            x = 0;
+            y = 0;
+        }
+
+        public void Set(float _x, float _y)
+        {
+            x = _x;
+            y = _y;
+        }
+
+        public void Set(Vec2 v)
+        {
+            x = v.x;
+            y = v.y;
+        }
+
+        public static Vec2 operator -(Vec2 l, Vec2 r)
+        {
+            Vec2 v = new Vec2(l.x - r.x, l.y - r.y);
+            return v;
+        }
+
+        public static Vec2 operator +(Vec2 l, Vec2 r)
+        {
+            Vec2 v = new Vec2(l.x + r.x, l.y + r.y);
+            return v;
+        }
+
+        public static Vec2 operator *(Vec2 l, float a)
+        {
+            return new Vec2(l.x * a, l.y * a);
+        }
+
+        public float Length()
+        {
+            return Convert.ToSingle(System.Math.Sqrt(x * x + y * y));
+        }
+
+        public float LengthSquared()
+        {
+            return x * x + y * y;
+        }
+
+        /// Convert this vector into a unit vector. Returns the length.
+        public float Normalize()
+        {
+            float length = Length();
+            if(length < float.Epsilon)
+            {
+                return 0; 
+            }
+            float invLength = 1 / length;
+            x *= invLength;
+            y *= invLength;
+            return length;
+        }
+
+        /// Does this vector contain finite coordinates?
+        public bool IsValid()
+        {
+            return Math.IsValid(x) && Math.IsValid(y);
+        }
+
+        /// Get the skew vector such that dot(skew_vec, other) == cross(vec, other)
+        public Vec2 Skew()
+        {
+            return new Vec2(-y, x);
+        }
+
+        public float x, y;
+    }
+}
diff --git a/Box2d/Assets/Program/Box2d/Common/Vec2.cs.meta b/Box2d/Assets/Program/Box2d/Common/Vec2.cs.meta
new file mode 100644
index 0000000..5b47692
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Common/Vec2.cs.meta
@@ -0,0 +1,11 @@
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diff --git a/Box2d/Assets/Program/Box2d/Common/Vec3.cs b/Box2d/Assets/Program/Box2d/Common/Vec3.cs
new file mode 100644
index 0000000..5315fab
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Common/Vec3.cs
@@ -0,0 +1,77 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Box2d
+{
+    class Vec3
+    {
+        public Vec3()
+        {
+            x = 0;
+            y = 0;
+            z = 0;
+        }
+
+        public Vec3(float _x, float _y, float _z)
+        {
+            x = _x;
+            y = _y;
+            z = _z;
+        }
+
+        public void SetZero()
+        {
+            x = y = z = 0.0f;
+        }
+
+        public void Set(float _x, float _y, float _z)
+        {
+            x = _x;
+            y = _y;
+            z = _z;
+        }
+
+        public static Vec3 operator -(Vec3 l, Vec3 r)
+        {
+            Vec3 v = new Vec3(l.x - r.x, l.y - r.y, l.z - r.z);
+            return v;
+        }
+
+        public static Vec3 operator +(Vec3 l, Vec3 r)
+        {
+            Vec3 v = new Vec3(l.x + r.x, l.y + r.y, l.z + r.z);
+            return v;
+        }
+
+        public static Vec3 operator *(Vec3 l, float a)
+        {
+            Vec3 v = new Vec3(l.x * a, l.y * a, l.z * a);
+            return v;
+        }
+
+        public void Add(Vec3 r)
+        {
+            x += r.x;
+            y += r.y;
+            z += r.z;
+        }
+
+        public void Minus(Vec3 r)
+        {
+            x -= r.x;
+            y -= r.y;
+            z -= r.z;
+        }
+
+        public void Multiply(float a)
+        {
+            x *= a;
+            y *= a;
+            z *= a;
+        }
+
+        public float x, y, z;
+    }
+}
diff --git a/Box2d/Assets/Program/Box2d/Dynamics.meta b/Box2d/Assets/Program/Box2d/Dynamics.meta
new file mode 100644
index 0000000..faf8ec2
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Dynamics.meta
@@ -0,0 +1,8 @@
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+  externalObjects: {}
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diff --git a/Box2d/Assets/Program/Box2d/Dynamics/Body.cs b/Box2d/Assets/Program/Box2d/Dynamics/Body.cs
new file mode 100644
index 0000000..5b8a47a
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Dynamics/Body.cs
@@ -0,0 +1,7 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Box2d
+{
+
+}
diff --git a/Box2d/Assets/Program/Box2d/Dynamics/Body.cs.meta b/Box2d/Assets/Program/Box2d/Dynamics/Body.cs.meta
new file mode 100644
index 0000000..feceb08
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diff --git a/Box2d/Assets/Program/Box2d/Dynamics/Contacts.meta b/Box2d/Assets/Program/Box2d/Dynamics/Contacts.meta
new file mode 100644
index 0000000..fa20c51
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Dynamics/Contacts.meta
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diff --git a/Box2d/Assets/Program/Box2d/Dynamics/Contacts/Contact.cs b/Box2d/Assets/Program/Box2d/Dynamics/Contacts/Contact.cs
new file mode 100644
index 0000000..5b8a47a
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Dynamics/Contacts/Contact.cs
@@ -0,0 +1,7 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Box2d
+{
+
+}
diff --git a/Box2d/Assets/Program/Box2d/Dynamics/Contacts/Contact.cs.meta b/Box2d/Assets/Program/Box2d/Dynamics/Contacts/Contact.cs.meta
new file mode 100644
index 0000000..a36c1ea
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diff --git a/Box2d/Assets/Program/Box2d/Dynamics/Joints.meta b/Box2d/Assets/Program/Box2d/Dynamics/Joints.meta
new file mode 100644
index 0000000..fd9c93b
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Dynamics/Joints.meta
@@ -0,0 +1,8 @@
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diff --git a/Box2d/Assets/Program/Box2d/Dynamics/Joints/Joint.cs b/Box2d/Assets/Program/Box2d/Dynamics/Joints/Joint.cs
new file mode 100644
index 0000000..5b8a47a
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Dynamics/Joints/Joint.cs
@@ -0,0 +1,7 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Box2d
+{
+
+}
diff --git a/Box2d/Assets/Program/Box2d/Dynamics/Joints/Joint.cs.meta b/Box2d/Assets/Program/Box2d/Dynamics/Joints/Joint.cs.meta
new file mode 100644
index 0000000..873395a
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diff --git a/Box2d/Assets/Program/Box2d/Rope.meta b/Box2d/Assets/Program/Box2d/Rope.meta
new file mode 100644
index 0000000..5581851
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Rope.meta
@@ -0,0 +1,8 @@
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diff --git a/Box2d/Assets/Program/Box2d/Rope/Rope.cs b/Box2d/Assets/Program/Box2d/Rope/Rope.cs
new file mode 100644
index 0000000..5b8a47a
--- /dev/null
+++ b/Box2d/Assets/Program/Box2d/Rope/Rope.cs
@@ -0,0 +1,7 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Box2d
+{
+
+}
diff --git a/Box2d/Assets/Program/Box2d/Rope/Rope.cs.meta b/Box2d/Assets/Program/Box2d/Rope/Rope.cs.meta
new file mode 100644
index 0000000..fa9b631
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diff --git a/Box2d/Assets/Program/Test.meta b/Box2d/Assets/Program/Test.meta
new file mode 100644
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+++ b/Box2d/Assets/Program/Test.meta
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diff --git a/Box2d/Assets/Scenes.meta b/Box2d/Assets/Scenes.meta
new file mode 100644
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diff --git a/Box2d/Assets/Scenes/SampleScene.unity b/Box2d/Assets/Scenes/SampleScene.unity
new file mode 100644
index 0000000..6511ad2
--- /dev/null
+++ b/Box2d/Assets/Scenes/SampleScene.unity
@@ -0,0 +1,258 @@
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+    backfaceThreshold: 100
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+  m_OcclusionCullingData: {fileID: 0}
+--- !u!104 &2
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+  m_ObjectHideFlags: 0
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