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local Body = {}
Body.__index = Body
function Body:new(shape, sizeA, sizeB, zoom)
local obj = {
shape = shape,
r = (shape == "circle" and sizeA or nil),
w = (shape == "rectangle" and sizeA or nil),
h = (shape == "rectangle" and sizeB or nil),
zoom = zoom or 1
}
setmetatable(obj, Body)
return obj
end
function Body:collide(other, x1, y1, x2, y2)
if self.shape == "circle" and other.shape == "circle" then
-- circle to circle
local dx = x2 - x1
local dy = y2 - y1
local distance = math.sqrt(dx * dx + dy * dy)
return distance < (self.r + other.r)
elseif self.shape == "rectangle" and other.shape == "rectangle" then
-- rect to rect
return x1 < x2 + other.w and x1 + self.w > x2 and y1 < y2 + other.h and y1 + self.h > y2
elseif self.shape == "circle" and other.shape == "rectangle" then
-- circle to rect
local closestX = math.max(x2, math.min(x1, x2 + other.w))
local closestY = math.max(y2, math.min(y1, y2 + other.h))
local dx = x1 - closestX
local dy = y1 - closestY
return (dx * dx + dy * dy) < (self.r * self.r)
elseif self.shape == "rectangle" and other.shape == "circle" then
return other:collide(self, x2, y2, x1, y1)
end
return false
end
function Body:isMet(body, selfX, selfY, currentX, currentY, dv, dir)
-- x,y should be the predicted next location of this body
-- dv = speed * dt * direction
local x, y
if dir == Direction.LEFT or dir == Direction.RIGHT then
x = currentX + dv
y = currentY
elseif dir == Direction.UP or dir == Direction.DOWN then
x = currentX
y = currentY + dv
end
return self:collide(body, selfX, selfY, x, y)
end
function Body:draw(x, y)
if self.shape == "circle" then
love.graphics.circle("fill", x, y, self.r)
elseif self.shape == "rectangle" then
love.graphics.rectangle("fill", x, y, self.w, self.h)
end
end
function Body:drawSprite(spriteName, x, y, angle)
local sprite = sprite.get(spriteName)
local w, h = (self.shape == "circle" and self.r or self.w), (self.shape == "circle" and self.r or self.h)
love.graphics.draw(sprite, x, y, angle,
w / sprite:getWidth(),
h / sprite:getHeight()
)
end
function Body:drawQuad(sheet, index, x, y, angle)
if self.shape == "circle" then
local r = self.r
local graphicR = r * self.zoom
sprite.drawQuad(sheet, index, x - r, y - r, graphicR, graphicR, angle or 0)
else
local w, h = self.w, self.h
local graphicW, graphicH = w * self.zoom, h * self.zoom
sprite.drawQuad(sheet, index, x - w/2, y - h/2, graphicW, graphicH, angle or 0)
end
end
return Body
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