BGE Physics

Clamp objects min/max velocity.
Accessed with bullet physics from the advanced button with dynamic and rigid body objects.
- useful for preventing unstable physics in cases where objects move too fast.
- can add linear velocity with the motion actuator to give smooth motion transitions, without moving too fast.
- minimum velocity means objects don't stop moving.
- python scripts can adjust these values speedup or throttle velocity in the existing direction.

Also made copy properties from an object with no properties work (in case you want to clear all props)

1 files changed, 22 insertions, 1 deletions

diff --git a/source/gameengine/Physics/Bullet/CcdPhysicsController.h b/source/gameengine/Physics/Bullet/CcdPhysicsController.h
index 245cde2baaa..c7638b36728 100644
--- a/source/gameengine/Physics/Bullet/CcdPhysicsController.h
+++ b/source/gameengine/Physics/Bullet/CcdPhysicsController.h
@@ -214,6 +214,8 @@ struct CcdConstructionInfo
 		m_gravity(0,0,0),
 		m_scaling(1.f,1.f,1.f),
 		m_mass(0.f),
+		m_clamp_vel_min(-1.f), 
+		m_clamp_vel_max(-1.f), 
 		m_restitution(0.1f),
 		m_friction(0.5f),
 		m_linearDamping(0.1f),
@@ -239,6 +241,8 @@ struct CcdConstructionInfo
 	btVector3	m_gravity;
 	btVector3	m_scaling;
 	btScalar	m_mass;
+	btScalar	m_clamp_vel_min;  
+	btScalar	m_clamp_vel_max;  
 	btScalar	m_restitution;
 	btScalar	m_friction;
 	btScalar	m_linearDamping;
@@ -479,7 +483,24 @@ class CcdPhysicsController : public PHY_IPhysicsController
 			}
 			m_cci.m_radius = margin;
 		}
-
+		
+		// velocity clamping
+		virtual void SetLinVelocityMin(float val) 
+		{
+			m_cci.m_clamp_vel_min= val;
+		}
+		virtual float GetLinVelocityMin() const 
+		{
+			return m_cci.m_clamp_vel_min;
+		}
+		virtual void SetLinVelocityMax(float val) 
+		{
+			m_cci.m_clamp_vel_max= val;
+		}
+		virtual float GetLinVelocityMax() const 
+		{
+			return m_cci.m_clamp_vel_max;
+		}
 
 		bool	wantsSleeping();