broken positioning, but functional mechanic almost

src/main.lua

@@ -124,7 +124,8 @@ local player_ship = {
   -- TODO fuel capacity and use (idle and while acceleration)
   -- TODO cargo / mass affects acceleration
 }
-player_ship.orbital_radius = math.sqrt(player_ship.position_x^2 + player_ship.position_y^2)
+-- player_ship.orbital_radius = math.sqrt(player_ship.position_x^2 + player_ship.position_y^2)
+-- player_ship.rotation_offset = math.atan2(player_ship.position_y, player_ship.position_x)
 
 -- TODO this just needs to be a list of all objects - including the player
 local resource_points = {} -- NOTE they're "planets" but I intend for them to be multiple things tbh
@@ -180,8 +181,8 @@ local core_object = {
 
 local last_message = ""
 local game_time = 0
--- local orbital_speed_constant = 1 -- ironically, I think 1 is exactly the speed I want (that was before the new orbit system)
-local orbital_speed_constant = 50
+local orbital_speed_constant = 1 -- ironically, I think 1 is exactly the speed I want
+-- local orbital_speed_constant = 50
 
 function love.update(dt)
   game_time = game_time + dt
@@ -233,12 +234,21 @@ function love.update(dt)
   player_ship.position_x = player_ship.position_x + player_ship.velocity_x * dt
   player_ship.position_y = player_ship.position_y + player_ship.velocity_y * dt
 
-  -- NOTE hardcoded player_ship orbiting center
-  player_ship.orbital_radius = math.sqrt(player_ship.position_x^2 + player_ship.position_y^2)
-  local player_rotation_offset = math.atan2(player_ship.position_y, player_ship.position_x)
-  local x, y = math.cos(dt / player_ship.orbital_radius / (1 / orbital_speed_constant) + player_rotation_offset), math.sin(dt / player_ship.orbital_radius / (1 / orbital_speed_constant) + player_rotation_offset)
-  player_ship.position_x = x * player_ship.orbital_radius
-  player_ship.position_y = y * player_ship.orbital_radius
+  if player_ship.velocity_x == 0 and player_ship.velocity_y == 0 then
+    player_ship.orbital_radius = player_ship.orbital_radius or math.sqrt(player_ship.position_x^2 + player_ship.position_y^2)
+    player_ship.rotation_offset = player_ship.rotation_offset or math.atan2(player_ship.position_y, player_ship.position_x) -- this will fail due to not being at timestep 0
+    -- might be fixable by computing where the game thinks the player should be and then adjusting it by where they are
+
+    -- TEMP player_ship localed to core_object orbit
+    local argument = game_time / player_ship.orbital_radius^1.337 * orbital_speed_constant * core_object.radar_size^2 + player_ship.rotation_offset
+    if (argument == math.huge) or (argument ~= argument) then
+      argument = 0
+    end
+    player_ship.position_x, player_ship.position_y = core_object.position_x + player_ship.orbital_radius * math.cos(argument), core_object.position_y + player_ship.orbital_radius * math.sin(argument)
+  else
+    player_ship.orbital_radius = nil
+    player_ship.rotation_offset = nil
+  end
 
   -- TODO make this toggleable instead of requiring holding a key
   if love.keyboard.isDown("space") then
@@ -285,7 +295,9 @@ function love.draw()
   love.graphics.translate(camera_offset.x, camera_offset.y)
   love.graphics.rectangle("line", player_ship.position_x - player_ship.radar_size / 2, player_ship.position_y - player_ship.radar_size / 2, player_ship.radar_size, player_ship.radar_size)
 
-  love.graphics.circle("line", 0, 0, player_ship.orbital_radius)
+  if player_ship.orbital_radius then
+    love.graphics.circle("line", 0, 0, player_ship.orbital_radius)
+  end
 
   local draw_object
   draw_object = function(current_object, parent_x, parent_y)
@@ -351,6 +363,7 @@ function love.keypressed(key)
     transfer_cargo(player_ship, nil, "warp fuel", 5)
     player_ship.position_x = screen_width / 2
     player_ship.position_y = screen_height / 2
+    -- WARNING currently broken because the core_object isn't updated
     resource_points = {}
     add_resource_points(love.math.random(5))
   end