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Make bouncy projectiles bounce off enemies when fired by the bouncer class #6

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Make bouncy projectiles bounce off enemies when fired by the bouncer class #6

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13 changes: 13 additions & 0 deletions GameObject.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,19 @@ function GameObject:enemyProjectileCollisions()
no_projectiles = proj.object.proj_spawned
})
end
elseif current_room.player.bouncer and proj.object.bounce and proj.object.bounce > 0 then
proj.object.bounce = proj.object.bounce - 1
local x1, y1 = proj.object.shape:center()
local x2, y2 = self.shape:center()
local n = math.atan2(y2 - y1, x2 -x1)
local nx, ny = math.cos(n), math.sin(n)
local wall = n - math.pi/2
local wx, wy = math.cos(wall), math.sin(wall)
local vx, vy = math.cos(proj.object.r), math.sin(proj.object.r)
local ux, uy = (vx * nx + vy * ny) * nx, (vx * nx + vy * ny) * ny
local wx, wy = vx - ux, vy - uy
local Vx, Vy = wx - ux, wy - uy
proj.object.r = math.acos(Vx), math.asin(Vy)
else
proj.object:die()
end
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