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Quick exit on shape:collidesWith(shape)

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Matthias Richter 2012-07-10 16:18:20 +02:00
parent b20fc496eb
commit 5125f35e71
1 changed files with 4 additions and 0 deletions
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4
shapes.lua
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@ -123,6 +123,7 @@ end
-- collision dispatching: -- collision dispatching:
-- let circle shape or compund shape handle the collision -- let circle shape or compund shape handle the collision
function ConvexPolygonShape:collidesWith(other) function ConvexPolygonShape:collidesWith(other)
if self == other then return false end
if other._type ~= Shape.POLYGON then if other._type ~= Shape.POLYGON then
local collide, sx,sy = other:collidesWith(self) local collide, sx,sy = other:collidesWith(self)
return collide, sx and -sx, sy and -sy return collide, sx and -sx, sy and -sy
@ -133,6 +134,7 @@ function ConvexPolygonShape:collidesWith(other)
end end
function ConcavePolygonShape:collidesWith(other) function ConcavePolygonShape:collidesWith(other)
if self == other then return false end
if other._type == Shape.POINT then if other._type == Shape.POINT then
return other:collidesWith(self) return other:collidesWith(self)
end end
@ -151,6 +153,7 @@ function ConcavePolygonShape:collidesWith(other)
end end
function CircleShape:collidesWith(other) function CircleShape:collidesWith(other)
if self == other then return false end
if other._type == Shape.CIRCLE then if other._type == Shape.CIRCLE then
local px,py = self._center.x-other._center.x, self._center.y-other._center.y local px,py = self._center.x-other._center.x, self._center.y-other._center.y
local d = vector.len2(px,py) local d = vector.len2(px,py)
@ -174,6 +177,7 @@ function CircleShape:collidesWith(other)
end end
function PointShape:collidesWith(other) function PointShape:collidesWith(other)
if self == other then return false end
if other._type == Shape.POINT then if other._type == Shape.POINT then
return (self._pos == other._pos), 0,0 return (self._pos == other._pos), 0,0
end end