stage 2

src/main.lua

@@ -1,4 +1,5 @@
 local screen_width, screen_height = love.graphics.getDimensions()
+math.randomseed(os.time())
 
 local player_ship = {
   position_x = screen_width / 2,
@@ -6,9 +7,37 @@ local player_ship = {
   velocity_x = 0,
   velocity_y = 0,
   acceleration = 100,
+
   radar_size = 10,
+
+  cargo_free_space = 100,
+  cargo_contents = {},
+  cargo_fill_speed = 10,
 }
 
+local resource_points = {}
+for i = 1, 3 do
+  local resource_point = {
+    position_x = math.random() * screen_width,
+    position_y = math.random() * screen_height,
+    radar_size = 10,
+
+    cargo_free_space = 100000,
+    cargo_contents = {},
+  }
+
+  local cargo_types = { "iron ore", "copper ore", }
+  local selected_type = cargo_types[math.random(2)]
+  local cargo_amount = math.random() * 10000
+  resource_point.cargo_contents[selected_type] = cargo_amount
+  resource_point.cargo_free_space = resource_point.cargo_free_space - cargo_amount
+
+  -- TODO make sure it is not placed on top of another one or too close
+  table.insert(resource_points, resource_point)
+end
+
+-- The player can hold a button to collect those resources and store them on their ship.
+
 function love.update(dt)
   if love.keyboard.isDown("w") then
     player_ship.velocity_y = player_ship.velocity_y - player_ship.acceleration * dt
@@ -25,12 +54,51 @@ 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
+
+  if love.keyboard.isDown("space") then
+    local selected_point, distance_to_point = nil, math.huge
+    for i = 1, #resource_points do
+      local resource_point = resource_points[i]
+      local distance_squared = (player_ship.position_x - resource_point.position_x)^2 + (player_ship.position_y - resource_point.position_y)^2
+      if distance_squared < distance_to_point then
+        selected_point = resource_point
+        distance_to_point = distance_squared
+      end
+    end
+    if distance_to_point > selected_point.radar_size^2 then
+      print("Too far to pick up cargo.")
+      return
+    end
+    if player_ship.cargo_free_space <= 0 then
+      print("No cargo space left.")
+      return
+    end
+    local cargo_type = next(selected_point.cargo_contents)
+    local cargo_amount = math.min(player_ship.cargo_fill_speed * dt, selected_point.cargo_contents[cargo_type])
+    if cargo_amount <= 0 then
+      print("There is no cargo to pick up.")
+      return
+    end
+    if not player_ship.cargo_contents[cargo_type] then
+      player_ship.cargo_contents[cargo_type] = 0
+    end
+    player_ship.cargo_contents[cargo_type] = player_ship.cargo_contents[cargo_type] + cargo_amount
+    player_ship.cargo_free_space = player_ship.cargo_free_space - cargo_amount
+    selected_point.cargo_contents[cargo_type] = selected_point.cargo_contents[cargo_type] - cargo_amount
+    selected_point.cargo_free_space = selected_point.cargo_free_space + cargo_amount
+    print("Transfered " .. cargo_amount .. " " .. cargo_type .. ".")
+  end
 end
 
 function love.draw()
   love.graphics.setColor(1, 1, 1, 1)
   -- love.graphics.circle("fill", player_ship.position_x, player_ship.position_y, 5)
   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)
+
+  for i = 1, #resource_points do
+    local resource_point = resource_points[i]
+    love.graphics.circle("line", resource_point.position_x, resource_point.position_y, resource_point.radar_size)
+  end
 end
 
 function love.keypressed(key)