World:getLinearDamping; World:setLinearDamping;

src/api/types/world.c

@@ -20,6 +20,23 @@ int l_lovrWorldSetGravity(lua_State* L) {
   return 0;
 }
 
+int l_lovrWorldGetLinearDamping(lua_State* L) {
+  World* world = luax_checktype(L, 1, World);
+  float damping, threshold;
+  lovrWorldGetLinearDamping(world, &damping, &threshold);
+  lua_pushnumber(L, damping);
+  lua_pushnumber(L, threshold);
+  return 2;
+}
+
+int l_lovrWorldSetLinearDamping(lua_State* L) {
+  World* world = luax_checktype(L, 1, World);
+  float damping = luaL_checknumber(L, 2);
+  float threshold = luaL_optnumber(L, 3, .01);
+  lovrWorldSetLinearDamping(world, damping, threshold);
+  return 0;
+}
+
 int l_lovrWorldUpdate(lua_State* L) {
   World* world = luax_checktype(L, 1, World);
   float dt = luaL_checknumber(L, 2);
@@ -30,6 +47,8 @@ int l_lovrWorldUpdate(lua_State* L) {
 const luaL_Reg lovrWorld[] = {
   { "getGravity", l_lovrWorldGetGravity },
   { "setGravity", l_lovrWorldSetGravity },
+  { "getLinearDamping", l_lovrWorldGetLinearDamping },
+  { "setLinearDamping", l_lovrWorldSetLinearDamping },
   { "update", l_lovrWorldUpdate },
   { NULL, NULL }
 };

src/physics/physics.c

@@ -42,6 +42,16 @@ void lovrWorldSetGravity(World* world, float x, float y, float z) {
   dWorldSetGravity(world->id, x, y, z);
 }
 
+void lovrWorldGetLinearDamping(World* world, float* damping, float* threshold) {
+  *damping = dWorldGetLinearDamping(world->id);
+  *threshold = dWorldGetLinearDampingThreshold(world->id);
+}
+
+void lovrWorldSetLinearDamping(World* world, float damping, float threshold) {
+  dWorldSetLinearDamping(world->id, damping);
+  dWorldSetLinearDampingThreshold(world->id, threshold);
+}
+
 void lovrWorldUpdate(World* world, float dt) {
   dWorldQuickStep(world->id, dt);
 }

src/physics/physics.h

@@ -13,4 +13,6 @@ World* lovrWorldCreate();
 void lovrWorldDestroy(const Ref* ref);
 void lovrWorldGetGravity(World* world, float* x, float* y, float* z);
 void lovrWorldSetGravity(World* world, float x, float y, float z);
+void lovrWorldGetLinearDamping(World* world, float* damping, float* threshold);
+void lovrWorldSetLinearDamping(World* world, float damping, float threshold);
 void lovrWorldUpdate(World* world, float dt);