From 3c8f4bd63b85a6e8c0b159d28408c85c0b40e8b9 Mon Sep 17 00:00:00 2001
From: bjorn <tie.372@gmail.com>
Date: Mon, 15 May 2017 23:03:01 -0600
Subject: [PATCH] World:getGravity; World:setGravity;

---
 src/api/types/world.c | 21 +++++++++++++++++++++
 src/physics/physics.c | 12 ++++++++++++
 src/physics/physics.h |  2 ++
 3 files changed, 35 insertions(+)

diff --git a/src/api/types/world.c b/src/api/types/world.c
index d0950c8c..518f30f9 100644
--- a/src/api/types/world.c
+++ b/src/api/types/world.c
@@ -1,6 +1,27 @@
 #include "api/lovr.h"
 #include "physics/physics.h"
 
+int l_lovrWorldGetGravity(lua_State* L) {
+  World* world = luax_checktype(L, 1, World);
+  float x, y, z;
+  lovrWorldGetGravity(world, &x, &y, &z);
+  lua_pushnumber(L, x);
+  lua_pushnumber(L, y);
+  lua_pushnumber(L, z);
+  return 3;
+}
+
+int l_lovrWorldSetGravity(lua_State* L) {
+  World* world = luax_checktype(L, 1, World);
+  float x = luaL_checknumber(L, 2);
+  float y = luaL_checknumber(L, 3);
+  float z = luaL_checknumber(L, 4);
+  lovrWorldSetGravity(world, x, y, z);
+  return 0;
+}
+
 const luaL_Reg lovrWorld[] = {
+  { "getGravity", l_lovrWorldGetGravity },
+  { "setGravity", l_lovrWorldSetGravity },
   { NULL, NULL }
 };
diff --git a/src/physics/physics.c b/src/physics/physics.c
index 49e723ab..a6645bdb 100644
--- a/src/physics/physics.c
+++ b/src/physics/physics.c
@@ -29,3 +29,15 @@ void lovrWorldDestroy(const Ref* ref) {
   dWorldDestroy(world->id);
   free(world);
 }
+
+void lovrWorldGetGravity(World* world, float* x, float* y, float* z) {
+  dReal gravity[3];
+  dWorldGetGravity(world->id, gravity);
+  *x = gravity[0];
+  *y = gravity[1];
+  *z = gravity[2];
+}
+
+void lovrWorldSetGravity(World* world, float x, float y, float z) {
+  dWorldSetGravity(world->id, x, y, z);
+}
diff --git a/src/physics/physics.h b/src/physics/physics.h
index 7bc2a615..ba2f2db5 100644
--- a/src/physics/physics.h
+++ b/src/physics/physics.h
@@ -11,3 +11,5 @@ void lovrPhysicsDestroy();
 
 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);