From e031d79d48cb4cb42ccb160d2894d078f835eb10 Mon Sep 17 00:00:00 2001
From: UbitUmarov
Date: Tue, 3 Apr 2018 23:00:37 +0100
Subject: add auxiliar functions float osVecMagSquare(a), float
 osVecDistSquare(vector a), float osAngleBetween(vector a, vector b) and float
 osRound(ffloat value, integer ndigits)

---
 .../Shared/Api/Implementation/OSSL_Api.cs          | 28 ++++++++++++++++++++++
 .../ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs |  6 +++++
 .../ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs   | 21 ++++++++++++++++
 OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs    |  5 ++++
 4 files changed, 60 insertions(+)

(limited to 'OpenSim/Region')

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
index e156582..51b289b 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
@@ -4804,5 +4804,33 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 return -1;
             return sog.GetLinkNumber(name);
         }
+
+        // rounds to the nearest number with provided number of decimal places
+        public LSL_Float osRound(LSL_Float value, LSL_Integer ndigits)
+        {
+            if(ndigits <= 0)
+                return Math.Round(value, MidpointRounding.AwayFromZero);
+            if(ndigits > 15)
+                ndigits = 15;
+            return Math.Round(value, ndigits, MidpointRounding.AwayFromZero);
+        }
+
+        public LSL_Float osVecMagSquare(LSL_Vector a)
+        {
+            return LSL_Vector.MagSquare(a);
+        }
+
+        public LSL_Float osVecDistSquare(LSL_Vector a, LSL_Vector b)
+        {
+            return LSL_Vector.MagSquare(a - b);
+        }
+
+        // returns the angle between 2 vectors -pi to pi
+        public LSL_Float osAngleBetween(LSL_Vector a, LSL_Vector b)
+        {
+            double dot = LSL_Vector.Dot(a,b);
+            double mcross = LSL_Vector.Mag(LSL_Vector.Cross(a,b));   
+            return Math.Atan2(mcross, dot);
+        }
     }
 }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
index ffb7ded..5cabf30 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
@@ -506,5 +506,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
 
         LSL_Integer osTeleportObject(LSL_Key objectUUID, vector targetPos, rotation targetrotation, LSL_Integer flags);
         LSL_Integer osGetLinkNumber(LSL_String name);
+
+        LSL_Float osRound(LSL_Float value, LSL_Integer digits);
+
+        LSL_Float osVecMagSquare(vector a);
+        LSL_Float osVecDistSquare(vector a, vector b);
+        LSL_Float osAngleBetween(vector a, vector b);
     }
 }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
index 30ff764..16b368c 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
@@ -1195,5 +1195,26 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
         {
             return m_OSSL_Functions.osGetLinkNumber(name);
         }
+
+        public LSL_Float osRound(LSL_Float value, LSL_Integer digits)
+        {
+            return m_OSSL_Functions.osRound(value, digits);
+        }
+
+        public LSL_Float osVecMagSquare(vector a)
+        {
+            return m_OSSL_Functions.osVecMagSquare(a);
+        }
+
+        public LSL_Float osVecDistSquare(vector a, vector b)
+        {
+            return m_OSSL_Functions.osVecDistSquare(a, b);
+        }
+
+        public LSL_Float osAngleBetween(vector a, vector b)
+        {
+            return m_OSSL_Functions.osAngleBetween(a, b);
+        }
+
     }
 }
diff --git a/OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs b/OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs
index a65f71f..1c152be 100644
--- a/OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs
@@ -304,6 +304,11 @@ namespace OpenSim.Region.ScriptEngine.Shared
                     );
             }
 
+            public static double MagSquare(Vector3 v)
+            {
+                return v.x * v.x + v.y * v.y + v.z * v.z;
+            }
+
             public static double Mag(Vector3 v)
             {
                 return Math.Sqrt(v.x * v.x + v.y * v.y + v.z * v.z);
-- 
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