Developing Games With Ruby: For those who write code for living

Author:Tomas Varaneckas [Varaneckas, Tomas]
Language: eng
Format: epub
Published: 2015-03-14T22:00:00+00:00

Back to TankPhysics:

class TankPhysics < Component # ... def can_move_to?(x, y) old_x, old_y = object.x, object.y object.x = x object.y = y return false unless @map.can_move_to?(x, y) @object_pool.nearby(object, 100).each do |obj| if collides_with_poly?(obj.box) # Allow to get unstuck old_distance = Utils.distance_between( obj.x, obj.y, old_x, old_y) new_distance = Utils.distance_between( obj.x, obj.y, x, y) return false if new_distance < old_distance end end true ensure object.x = old_x object.y = old_y end # ... private def collides_with_poly?(poly) if poly poly.each_slice(2) do |x, y| return true if Utils.point_in_poly(x, y, *box) end box.each_slice(2) do |x, y| return true if Utils.point_in_poly(x, y, *poly) end end false end # ... end

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