Fix level reload not working when paused

assets/blender/test_level_blend/Scene.scn

@@ -15,7 +15,7 @@
 	:scale (1.000000 1.000000 1.000000))
 (inst
 	:model "assets/blender/testblend_blend/Gas_Station_Shop.glb"
-	:pos (-7.000000 0.000000 -20.000000)
+	:pos (-16.000000 0.000000 -18.000000)
 	:rot (0.000000 0.000000 0.000000 1.000000)
 	:scale (1.000000 1.000000 1.000000))
 (inst

game/assets/assets.odin

@@ -778,15 +778,15 @@ get_scene_desc :: proc(
 	force_no_reload := false,
 ) -> (
 	scene: Scene_Desc,
-	reloaded: bool,
+	modtime: i64,
 ) {
-	asset, _, res := assetman_fetch_or_load(
+	asset, mtime, _ := assetman_fetch_or_load(
 		assetman,
 		Asset_Key{path = path, type = .Scene},
 		nil,
 		force_no_reload,
 	)
-	return asset.(Scene_Desc), (res == .Loaded || res == .Reloaded)
+	return asset.(Scene_Desc), mtime
 }
 
 get_convex :: proc(assetman: ^Asset_Manager, path: cstring) -> (result: Loaded_Convex) {

game/game.odin

@@ -49,6 +49,7 @@ Debug_Draw_State :: struct {
 
 Scene :: struct {
 	scene_desc_path: name.Name,
+	modtime:         i64,
 	level_geoms:     []physics.Level_Geom_Handle,
 }
 
@@ -66,12 +67,13 @@ immediate_scene :: proc(world: ^World, scene: ^Scene, path: cstring) {
 	tracy.Zone()
 	path_name := name.from_cstring(path)
 
-	desc, reloaded := assets.get_scene_desc(&g_mem.assetman, path_name)
+	desc, modtime := assets.get_scene_desc(&g_mem.assetman, path_name)
 
-	if reloaded || scene.scene_desc_path != path_name {
+	if scene.scene_desc_path != path_name || scene.modtime != modtime {
 		scene_destroy(world, scene)
 
 		scene.scene_desc_path = path_name
+		scene.modtime = modtime
 		scene.level_geoms = make([]physics.Level_Geom_Handle, len(desc.instances))
 
 		sim_state := physics.get_sim_state(&world.physics_scene)

game/physics/scene.odin

@@ -140,6 +140,7 @@ copy_sim_state :: proc(dst: ^Sim_State, src: ^Sim_State) {
 	dst.first_free_engine_plus_one = src.first_free_engine_plus_one
 	dst.first_free_shape_plus_one = src.first_free_shape_plus_one
 
+	// TODO: shrink when possible
 	resize(&dst.bodies, len(src.bodies))
 	resize(&dst.suspension_constraints, len(src.suspension_constraints))
 	resize(&dst.engines, len(src.engines))
@@ -174,10 +175,9 @@ copy_physics_scene :: proc(dst, src: ^Scene) {
 
 	dst.assetman = src.assetman
 	dst.simulation_state_index = src.simulation_state_index
-	src_sim_state := get_sim_state(src)
-	dst_sim_state := get_sim_state(dst)
 
-	copy_sim_state(dst_sim_state, src_sim_state)
+	copy_sim_state(&dst.simulation_states[0], &src.simulation_states[0])
+	copy_sim_state(&dst.simulation_states[1], &src.simulation_states[1])
 	copy_solver_state(&dst.solver_state, &src.solver_state)
 }