speck system export/load

1 files changed, 70 insertions, 22 deletions

diff --git a/src/objs/specks.lua b/src/objs/specks.lua
index 5044c9c..75e3a77 100644
--- a/src/objs/specks.lua
+++ b/src/objs/specks.lua
@@ -1,23 +1,28 @@
 Speck_Sys = {}
 Speck_Sys.__index = Speck_Sys
 
-function speck_shape_rectangle(speck_sys)
-  local w = (speck_sys.spawn_width or 0) / 2
-  local h = (speck_sys.spawn_height or 0) / 2
 
-  return randf_range(-w, w), randf_range(-h, h)
-end
 
-function speck_shape_point(speck_sys)
-  return 0, 0
-end
 
-function speck_shape_circle(speck_sys)
-  local angle = randf_range(0, math.pi * 2)
-  local r = speck_sys.spawn_radius or 0
-  r = r * lmath.random()
-  return r*math.cos(angle), r*math.sin(angle)
-end
+local SPAWN_FUNCTIONS = {
+  Rectangle = function (speck_sys)
+    local w = (speck_sys.spawn_width or 0) / 2
+    local h = (speck_sys.spawn_height or 0) / 2
+
+    return randf_range(-w, w), randf_range(-h, h)
+  end,
+
+  Circle = function (speck_sys)
+    local angle = randf_range(0, math.pi * 2)
+    local r = speck_sys.spawn_radius or 0
+    r = r * lmath.random()
+    return r*math.cos(angle), r*math.sin(angle)
+  end,
+
+  Point = function (speck_sys)
+    return 0, 0
+  end
+}
 
 function Speck_Sys.new()
   local self = setmetatable({}, Speck_Sys)
@@ -38,12 +43,12 @@ function Speck_Sys.new()
   self.free_ids = {}
   self.free_ids_size = 0
 
-  self.spawn_shape = speck_shape_point
+  self.spawn_shape = "Point"
 
   self.spawn_amount_min = 1
   self.spawn_amount_max = 1
 
-  self.scale_curve = lerp
+  self.scale_curve = "Lerp"
   self.scale_start_min = 0.8
   self.scale_start_max = 1.25
 
@@ -61,12 +66,12 @@ function Speck_Sys.new()
   self.lifetime_max = 5
 
   self.interval = 0.1
-  self.spawn_timer = self.interval
 
-  self.texture = get_tex("res/img/speck.png")
+  self.texture_path = "res/img/speck.png"
 
   self.x = 0
   self.y = 0
+  self.spawn_timer = self.interval
   return self
 end
 
@@ -83,10 +88,12 @@ function Speck_Sys:check_bounce(i)
     to_tile_coords(self.data.pos[i].x, self.data.pos[i].y))
 end
 
+
 function Speck_Sys:spawn_particles()
   local data = self.data
   local amt = lmath.random(self.spawn_amount_min, self.spawn_amount_max)
 
+  local shape_func = SPAWN_FUNCTIONS[self.spawn_shape]
   for i = 1, amt do
     local id
     if self.free_ids_size > 0 then
@@ -99,7 +106,7 @@ function Speck_Sys:spawn_particles()
 
     data.alive[id] = true
 
-    local offx, offy = self.spawn_shape(self)
+    local offx, offy = shape_func(self)
     data.pos[id] = { x = self.x + offx, y = self.y + offy }
     data.vel[id] = { x = self.initial_velx, y = self.initial_vely }
 
@@ -173,8 +180,9 @@ function Speck_Sys:update(dt)
 end
 
 function Speck_Sys:draw()
-  local scale_curve = self.scale_curve
+  local scale_curve = EASING_FUNCTIONS[self.scale_curve]
   local data = self.data
+  local tex = get_tex(self.texture_path)
 
   for i = 1, data.size do
     if not data.alive[i] then
@@ -184,10 +192,10 @@ function Speck_Sys:draw()
     local anim = 1 - data.lifetime[i] / data.lifetime_max[i]
     local scale = scale_curve(data.scale_start[i], data.scale_end[i], anim)
 
-    local w, h = self.texture:getDimensions()
+    local w, h = tex:getDimensions()
 
     lg.draw(
-      self.texture, data.pos[i].x, data.pos[i].y, 0, scale, scale, w / 2, h / 2
+      tex, data.pos[i].x, data.pos[i].y, 0, scale, scale, w / 2, h / 2
     )
     ::next_speck_draw::
   end
@@ -207,3 +215,43 @@ end
 function speck_draw_sys(ent)
   ent.speck_sys:draw()
 end
+
+function export_speck_sys(sys, filename)
+  local EXPORTED_ARGS = {
+    "spawn_shape",
+    "spawn_amount_min",
+    "spawn_amount_max",
+    "spawn_width",
+    "spawn_height",
+    "spawn_radius",
+    "scale_curve",
+    "scale_start_min",
+    "scale_start_max",
+    "scale_end_min",
+    "scale_end_max",
+    "forcex",
+    "forcey",
+    "initial_velx",
+    "initial_vely",
+    "spread",
+    "lifetime_min",
+    "lifetime_max",
+    "interval",
+    "texture_path"
+  }
+  local exp = {}
+
+  for i, arg in ipairs(EXPORTED_ARGS) do
+    exp[arg] = sys[arg]
+  end
+  export_to_source(exp, filename)
+end
+
+function load_speck_sys(filename)
+  local sys = Speck_Sys.new()
+  local loaded = lf.load(filename)()
+  for key, data in pairs(loaded) do
+    sys[key] = data
+  end
+  return sys
+end