From f3a920237b479149537f39d203c824571123d032 Mon Sep 17 00:00:00 2001
From: UbitUmarov <ajlduarte@sapo.pt>
Date: Sun, 2 Jul 2017 01:34:06 +0100
Subject: [PATCH]  oops i forgot the avatar knees bending on ramps... so go
 back..

---
 .../PhysicsModules/ubOde/ODECharacter.cs      | 42 ++++++++++---------
 .../Region/PhysicsModules/ubOde/ODEScene.cs   | 15 ++++---
 2 files changed, 33 insertions(+), 24 deletions(-)

diff --git a/OpenSim/Region/PhysicsModules/ubOde/ODECharacter.cs b/OpenSim/Region/PhysicsModules/ubOde/ODECharacter.cs
index b0f3f526fd..6016530ba5 100644
--- a/OpenSim/Region/PhysicsModules/ubOde/ODECharacter.cs
+++ b/OpenSim/Region/PhysicsModules/ubOde/ODECharacter.cs
@@ -899,10 +899,11 @@ namespace OpenSim.Region.PhysicsModule.ubOde
             y = tx * sin + y * cos;
         }
 
-        public bool Collide(IntPtr me, IntPtr other, bool reverse, ref d.ContactGeom contact,
-                ref bool feetcollision)
-        {
+            public bool Collide(IntPtr me, IntPtr other, bool reverse, ref d.ContactGeom contact,
+                ref d.ContactGeom altContact , ref bool useAltcontact, ref bool feetcollision)
+            {
             feetcollision = false;
+            useAltcontact = false;
 
             if (me == capsule)
             {
@@ -962,6 +963,18 @@ namespace OpenSim.Region.PhysicsModule.ubOde
                 if(m_flying)
                     return true;
 
+                feetcollision = true;
+                if (h < boneOff)
+                {
+                    m_collideNormal.X = contact.normal.X;
+                    m_collideNormal.Y = contact.normal.Y;
+                    m_collideNormal.Z = contact.normal.Z;
+                    IsColliding = true;
+                }
+
+                altContact = contact;
+                useAltcontact = true;
+
                 offset.Z -= 0.2f;
 
                 offset.Normalize();
@@ -980,28 +993,19 @@ namespace OpenSim.Region.PhysicsModule.ubOde
                 if (tdp > 0.25f)
                     tdp = 0.25f;
 
-                contact.depth = tdp;
+                altContact.depth = tdp;
 
                 if (reverse)
                 {
-                    contact.normal.X = offset.X;
-                    contact.normal.Y = offset.Y;
-                    contact.normal.Z = offset.Z;
+                    altContact.normal.X = offset.X;
+                    altContact.normal.Y = offset.Y;
+                    altContact.normal.Z = offset.Z;
                 }
                 else
                 {
-                    contact.normal.X = -offset.X;
-                    contact.normal.Y = -offset.Y;
-                    contact.normal.Z = -offset.Z;
-                }
-
-                feetcollision = true;
-                if (h < boneOff)
-                {
-                    m_collideNormal.X = contact.normal.X;
-                    m_collideNormal.Y = contact.normal.Y;
-                    m_collideNormal.Z = contact.normal.Z;
-                    IsColliding = true;
+                    altContact.normal.X = -offset.X;
+                    altContact.normal.Y = -offset.Y;
+                    altContact.normal.Z = -offset.Z;
                 }
                 return true;
             }
diff --git a/OpenSim/Region/PhysicsModules/ubOde/ODEScene.cs b/OpenSim/Region/PhysicsModules/ubOde/ODEScene.cs
index 0837bfb363..844d02bad1 100644
--- a/OpenSim/Region/PhysicsModules/ubOde/ODEScene.cs
+++ b/OpenSim/Region/PhysicsModules/ubOde/ODEScene.cs
@@ -951,7 +951,9 @@ namespace OpenSim.Region.PhysicsModule.ubOde
             SharedTmpcontact.surface.mu = mu;
             SharedTmpcontact.surface.bounce = bounce;
 
-            bool noskip = true;
+            d.ContactGeom altContact = new d.ContactGeom();
+            bool useAltcontact;
+            bool noskip;
 
             if(dop1ava || dop2ava)
                 smoothMesh = false;
@@ -959,10 +961,11 @@ namespace OpenSim.Region.PhysicsModule.ubOde
             while (true)
             {
                 noskip = true;
+                useAltcontact = false;
 
                 if (dop1ava)
                 {
-                    if ((((OdeCharacter)p1).Collide(g1, g2, false, ref curContact, ref FeetCollision)))
+                    if ((((OdeCharacter)p1).Collide(g1, g2, false, ref curContact, ref altContact , ref useAltcontact, ref FeetCollision)))
                     {
                         if (p2.PhysicsActorType == (int)ActorTypes.Agent)
                         {
@@ -977,7 +980,7 @@ namespace OpenSim.Region.PhysicsModule.ubOde
                 }
                 else if (dop2ava)
                 {
-                if ((((OdeCharacter)p2).Collide(g2, g1, true, ref curContact, ref FeetCollision)))
+                if ((((OdeCharacter)p2).Collide(g2, g1, true, ref curContact, ref altContact , ref useAltcontact, ref FeetCollision)))
                     {
                     if (p1.PhysicsActorType == (int)ActorTypes.Agent)
                         {
@@ -993,8 +996,10 @@ namespace OpenSim.Region.PhysicsModule.ubOde
 
                 if (noskip)
                 {
-                    Joint = CreateContacJoint(ref curContact,smoothMesh);
-
+                    if(useAltcontact)
+                        Joint = CreateContacJoint(ref altContact,smoothMesh);
+                    else
+                        Joint = CreateContacJoint(ref curContact,smoothMesh);
                     if (Joint == IntPtr.Zero)
                         break;