Sha256: cc72b25b12b6311d1ff84e6879cd5ef6509db573286c3dd74bccf60a4e78cb04
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Versions: 8
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Stored size: 1.59 KB
Contents
class AaBbCollidable < CollidableShape
attr_accessor :cw_local_points
def setup
@shape_type = opts[:shape]
@cw_local_points = opts[:cw_local_points]
@cw_local_points ||= opts[:points] || []
@cw_world_points ||= build_aabb
@radius = opts[:radius]
@radius ||= calculate_radius
@old_x = actor_x
@old_y = actor_y
end
def build_aabb
w = @actor.width
h = @actor.height
[
[0,0],
[w,0],
[w,h],
[0,h]
]
end
def calculate_radius
w = @actor.width
hw = w * 0.5
h = @actor.height
hh = h * 0.5
Math.sqrt(hw*hw+hh*hh)
end
def center_x
actor_x + @actor.width * 0.5
end
def center_y
actor_y + @actor.height * 0.5
end
def cw_world_points
@cached_points ||= @cw_local_points.map{|lp| [lp[0]+actor_x,lp[1]+actor_y]}
end
def cw_world_lines
return @cached_lines if @cached_lines
lines = []
hw = @actor.width * 0.5
hh = @actor.height * 0.5
lines = [
[[actor_x-hw,actor_y+hh], [actor_x+hw,actor_y+hh]],
[[actor_x+hw,actor_y+hh], [actor_x+hw,actor_y-hh]],
[[actor_x+hw,actor_y-hh], [actor_x-hw,actor_y-hh]],
[[actor_x-hw,actor_y-hh], [actor_x-hw,actor_y+hh]]
]
@cached_lines = lines
end
def cw_world_edge_normals
@cached_normals ||= [[1,0],[0,1]]
end
def recalculate_collidable_cache
unless @old_x == actor_x && @old_y == actor_y
clear_collidable_cache
@old_x = actor_x
@old_y = actor_y
end
end
def clear_collidable_cache
@cached_points = nil
@cached_lines = nil
@cached_poly_center = nil
end
end
Version data entries
8 entries across 8 versions & 1 rubygems