From dab0be7055a07f002421694c73b6d0dc8e459663 Mon Sep 17 00:00:00 2001
From: bjorn <tie.372@gmail.com>
Date: Mon, 11 May 2020 12:05:30 -0600
Subject: [PATCH] World:getColliders;

---
 src/api/l_physics_world.c     | 22 ++++++++++++++++++++++
 src/modules/physics/physics.c |  4 ++++
 src/modules/physics/physics.h |  1 +
 3 files changed, 27 insertions(+)

diff --git a/src/api/l_physics_world.c b/src/api/l_physics_world.c
index d3437185..6522d7b9 100644
--- a/src/api/l_physics_world.c
+++ b/src/api/l_physics_world.c
@@ -110,6 +110,27 @@ static int l_lovrWorldNewSphereCollider(lua_State* L) {
   return 1;
 }
 
+static int l_lovrWorldGetColliders(lua_State* L) {
+  World* world = luax_checktype(L, 1, World);
+
+  if (lua_istable(L, 2)) {
+    lua_settop(L, 2);
+  } else {
+    lua_newtable(L);
+  }
+
+  Collider* collider = lovrWorldGetFirstCollider(world);
+  int index = 1;
+
+  while (collider) {
+    luax_pushtype(L, Collider, collider);
+    lua_rawseti(L, -2, index++);
+    collider = collider->next;
+  }
+
+  return 1;
+}
+
 static int l_lovrWorldDestroy(lua_State* L) {
   World* world = luax_checktype(L, 1, World);
   lovrWorldDestroyData(world);
@@ -255,6 +276,7 @@ const luaL_Reg lovrWorld[] = {
   { "newCapsuleCollider", l_lovrWorldNewCapsuleCollider },
   { "newCylinderCollider", l_lovrWorldNewCylinderCollider },
   { "newSphereCollider", l_lovrWorldNewSphereCollider },
+  { "getColliders", l_lovrWorldGetColliders },
   { "destroy", l_lovrWorldDestroy },
   { "update", l_lovrWorldUpdate },
   { "computeOverlaps", l_lovrWorldComputeOverlaps },
diff --git a/src/modules/physics/physics.c b/src/modules/physics/physics.c
index ddf301f1..39a21f04 100644
--- a/src/modules/physics/physics.c
+++ b/src/modules/physics/physics.c
@@ -179,6 +179,10 @@ int lovrWorldCollide(World* world, Shape* a, Shape* b, float friction, float res
   return contactCount;
 }
 
+Collider* lovrWorldGetFirstCollider(World* world) {
+  return world->head;
+}
+
 void lovrWorldGetGravity(World* world, float* x, float* y, float* z) {
   dReal gravity[3];
   dWorldGetGravity(world->id, gravity);
diff --git a/src/modules/physics/physics.h b/src/modules/physics/physics.h
index af54a80c..3a0d1893 100644
--- a/src/modules/physics/physics.h
+++ b/src/modules/physics/physics.h
@@ -94,6 +94,7 @@ void lovrWorldUpdate(World* world, float dt, CollisionResolver resolver, void* u
 void lovrWorldComputeOverlaps(World* world);
 int lovrWorldGetNextOverlap(World* world, Shape** a, Shape** b);
 int lovrWorldCollide(World* world, Shape* a, Shape* b, float friction, float restitution);
+Collider* lovrWorldGetFirstCollider(World* world);
 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);