From 1a4193831cc23bbcc329b4ee7f485b68e7e0f1e6 Mon Sep 17 00:00:00 2001
From: bjorn <tie.372@gmail.com>
Date: Mon, 15 May 2017 23:14:07 -0600
Subject: [PATCH] Body:getLinearDamping; Body:setLinearDamping;

---
 src/api/types/body.c  | 19 +++++++++++++++++++
 src/physics/physics.c | 10 ++++++++++
 src/physics/physics.h |  2 ++
 3 files changed, 31 insertions(+)

diff --git a/src/api/types/body.c b/src/api/types/body.c
index a25d434a..b1443e34 100644
--- a/src/api/types/body.c
+++ b/src/api/types/body.c
@@ -79,6 +79,23 @@ int l_lovrBodySetAngularVelocity(lua_State* L) {
   return 0;
 }
 
+int l_lovrBodyGetLinearDamping(lua_State* L) {
+  Body* body = luax_checktype(L, 1, Body);
+  float damping, threshold;
+  lovrBodyGetLinearDamping(body, &damping, &threshold);
+  lua_pushnumber(L, damping);
+  lua_pushnumber(L, threshold);
+  return 2;
+}
+
+int l_lovrBodySetLinearDamping(lua_State* L) {
+  Body* body = luax_checktype(L, 1, Body);
+  float damping = luaL_checknumber(L, 2);
+  float threshold = luaL_optnumber(L, 3, .01);
+  lovrBodySetLinearDamping(body, damping, threshold);
+  return 0;
+}
+
 const luaL_Reg lovrBody[] = {
   { "getPosition", l_lovrBodyGetPosition },
   { "setPosition", l_lovrBodySetPosition },
@@ -88,5 +105,7 @@ const luaL_Reg lovrBody[] = {
   { "setLinearVelocity", l_lovrBodySetLinearVelocity },
   { "getAngularVelocity", l_lovrBodyGetAngularVelocity },
   { "setAngularVelocity", l_lovrBodySetAngularVelocity },
+  { "getLinearDamping", l_lovrBodyGetLinearDamping },
+  { "setLinearDamping", l_lovrBodySetLinearDamping },
   { NULL, NULL }
 };
diff --git a/src/physics/physics.c b/src/physics/physics.c
index 4d8b857a..8571b0dd 100644
--- a/src/physics/physics.c
+++ b/src/physics/physics.c
@@ -140,3 +140,13 @@ void lovrBodyGetAngularVelocity(Body* body, float* x, float* y, float* z) {
 void lovrBodySetAngularVelocity(Body* body, float x, float y, float z) {
   dBodySetAngularVel(body->id, x, y, z);
 }
+
+void lovrBodyGetLinearDamping(Body* body, float* damping, float* threshold) {
+  *damping = dBodyGetLinearDamping(body->id);
+  *threshold = dBodyGetLinearDampingThreshold(body->id);
+}
+
+void lovrBodySetLinearDamping(Body* body, float damping, float threshold) {
+  dBodySetLinearDamping(body->id, damping);
+  dBodySetLinearDampingThreshold(body->id, threshold);
+}
diff --git a/src/physics/physics.h b/src/physics/physics.h
index 4292a6f5..e7211a7e 100644
--- a/src/physics/physics.h
+++ b/src/physics/physics.h
@@ -37,3 +37,5 @@ void lovrBodyGetLinearVelocity(Body* body, float* x, float* y, float* z);
 void lovrBodySetLinearVelocity(Body* body, float x, float y, float z);
 void lovrBodyGetAngularVelocity(Body* body, float* x, float* y, float* z);
 void lovrBodySetAngularVelocity(Body* body, float x, float y, float z);
+void lovrBodyGetLinearDamping(Body* body, float* damping, float* threshold);
+void lovrBodySetLinearDamping(Body* body, float damping, float threshold);