From ea31a552ef15c6bddfe3b12127ff4dfba13639de Mon Sep 17 00:00:00 2001
From: Bruno Dilly <bdilly@profusion.mobi>
Date: Fri, 29 Jun 2012 22:24:33 +0000
Subject: [PATCH] EPhysics: add linear slop setter / getter for world

Constraint solver can be configured using some advanced settings, like
the solver slop factor.

Linear slop on sequencial impulse constraint solver is used as a factor
for penetration. The penetration will the manifold distance + linear slop.



SVN revision: 73066
---
 legacy/ephysics/src/lib/EPhysics.h         | 35 ++++++++++++++++++++++
 legacy/ephysics/src/lib/ephysics_world.cpp | 24 +++++++++++++++
 2 files changed, 59 insertions(+)

diff --git a/legacy/ephysics/src/lib/EPhysics.h b/legacy/ephysics/src/lib/EPhysics.h
index be887740f1..53878c2374 100644
--- a/legacy/ephysics/src/lib/EPhysics.h
+++ b/legacy/ephysics/src/lib/EPhysics.h
@@ -565,6 +565,41 @@ EAPI void ephysics_world_event_callback_add(EPhysics_World *world, EPhysics_Call
  */
 EAPI void *ephysics_world_event_callback_del(EPhysics_World *world, EPhysics_Callback_Type type, EPhysics_World_Event_Cb func);
 
+/**
+ * @brief
+ * Set linear slop to be used by world.
+ *
+ * Constraint solver can be configured using some advanced settings, like
+ * the solver slop factor.
+ *
+ * The default value is set to 0 with a small value results in a smoother
+ * stabilization for stacking bodies.
+ *
+ * Linear slop on sequencial impulse constraint solver is used as a factor
+ * for penetration. The penetration will the manifold distance + linear slop.
+ *
+ * @param world The physics world.
+ * @param linear_slop New linear slop value to be used by constraint solver
+ * of physics engine.
+ *
+ * @ingroup EPhysics_World
+ */
+EAPI void ephysics_world_linear_slop_set(EPhysics_World *world, double linear_slop);
+
+/**
+ * @brief
+ * Get linear slop used by world.
+ *
+ * @param world The physics world.
+ * @return Linear slop value used by constraint solver of physics engine or 0
+ * on failure.
+ *
+ * @see ephysics_world_linear_slop_set() for details.
+ *
+ * @ingroup EPhysics_World
+ */
+EAPI double ephysics_world_linear_slop_get(EPhysics_World *world);
+
 /**
  * @}
  */
diff --git a/legacy/ephysics/src/lib/ephysics_world.cpp b/legacy/ephysics/src/lib/ephysics_world.cpp
index 0136a07e5d..7159eecbf3 100644
--- a/legacy/ephysics/src/lib/ephysics_world.cpp
+++ b/legacy/ephysics/src/lib/ephysics_world.cpp
@@ -642,6 +642,30 @@ ephysics_world_render_geometry_get(EPhysics_World *world, Evas_Coord *x, Evas_Co
    if (h) *h = world->h;
 }
 
+EAPI void
+ephysics_world_linear_slop_set(EPhysics_World *world, double linear_slop)
+{
+   if (!world)
+     {
+        ERR("Can't set linear slop, world is null.");
+        return;
+     }
+
+   world->dynamics_world->getSolverInfo().m_linearSlop = btScalar(linear_slop);
+}
+
+EAPI double
+ephysics_world_linear_slop_get(EPhysics_World *world)
+{
+   if (!world)
+     {
+        ERR("Can't get linear slop, world is null.");
+        return 0;
+     }
+
+   return world->dynamics_world->getSolverInfo().m_linearSlop;
+}
+
 #ifdef  __cplusplus
 }
 #endif