1 files changed, 0 insertions, 168 deletions
diff --git a/geom.lua b/geom.lua
deleted file mode 100644
index 891e98d..0000000
--- a/geom.lua
+++ /dev/null
@@ -1,168 +0,0 @@
-geom = {}
-
-function geom.on_shape(x,y, drawing, shape)
-  if shape.mode == 'freehand' then
-    return geom.on_freehand(x,y, drawing, shape)
-  elseif shape.mode == 'line' then
-    return geom.on_line(x,y, drawing, shape)
-  elseif shape.mode == 'manhattan' then
-    local p1 = drawing.points[shape.p1]
-    local p2 = drawing.points[shape.p2]
-    if p1.x == p2.x then
-      if x ~= p1.x then return false end
-      local y1,y2 = p1.y, p2.y
-      if y1 > y2 then
-        y1,y2 = y2,y1
-      end
-      return y >= y1-2 and y <= y2+2
-    elseif p1.y == p2.y then
-      if y ~= p1.y then return false end
-      local x1,x2 = p1.x, p2.x
-      if x1 > x2 then
-        x1,x2 = x2,x1
-      end
-      return x >= x1-2 and x <= x2+2
-    end
-  elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then
-    return geom.on_polygon(x,y, drawing, shape)
-  elseif shape.mode == 'circle' then
-    local center = drawing.points[shape.center]
-    local dist = geom.dist(center.x,center.y, x,y)
-    return dist > shape.radius*0.95 and dist < shape.radius*1.05
-  elseif shape.mode == 'arc' then
-    local center = drawing.points[shape.center]
-    local dist = geom.dist(center.x,center.y, x,y)
-    if dist < shape.radius*0.95 or dist > shape.radius*1.05 then
-      return false
-    end
-    return geom.angle_between(center.x,center.y, x,y, shape.start_angle,shape.end_angle)
-  elseif shape.mode == 'deleted' then
-  else
-    print(shape.mode)
-    assert(false)
-  end
-end
-
-function geom.on_freehand(x,y, drawing, shape)
-  local prev
-  for _,p in ipairs(shape.points) do
-    if prev then
-      if geom.on_line(x,y, drawing, {p1=prev, p2=p}) then
-        return true
-      end
-    end
-    prev = p
-  end
-  return false
-end
-
-function geom.on_line(x,y, drawing, shape)
-  local p1,p2
-  if type(shape.p1) == 'number' then
-    p1 = drawing.points[shape.p1]
-    p2 = drawing.points[shape.p2]
-  else
-    p1 = shape.p1
-    p2 = shape.p2
-  end
-  if p1.x == p2.x then
-    if math.abs(p1.x-x) > 2 then
-      return false
-    end
-    local y1,y2 = p1.y,p2.y
-    if y1 > y2 then
-      y1,y2 = y2,y1
-    end
-    return y >= y1-2 and y <= y2+2
-  end
-  -- has the right slope and intercept
-  local m = (p2.y - p1.y) / (p2.x - p1.x)
-  local yp = p1.y + m*(x-p1.x)
-  if yp < y-2 or yp > y+2 then
-    return false
-  end
-  -- between endpoints
-  local k = (x-p1.x) / (p2.x-p1.x)
-  return k > -0.005 and k < 1.005
-end
-
-function geom.on_polygon(x,y, drawing, shape)
-  local prev
-  for _,p in ipairs(shape.vertices) do
-    if prev then
-      if geom.on_line(x,y, drawing, {p1=prev, p2=p}) then
-        return true
-      end
-    end
-    prev = p
-  end
-  return geom.on_line(x,y, drawing, {p1=shape.vertices[1], p2=shape.vertices[#shape.vertices]})
-end
-
--- are (x3,y3) and (x4,y4) on the same side of the line between (x1,y1) and (x2,y2)
-function geom.same_side(x1,y1, x2,y2, x3,y3, x4,y4)
-  if x1 == x2 then
-    return math.sign(x3-x1) == math.sign(x4-x1)
-  end
-  if y1 == y2 then
-    return math.sign(y3-y1) == math.sign(y4-y1)
-  end
-  local m = (y2-y1)/(x2-x1)
-  return math.sign(m*(x3-x1) + y1-y3) == math.sign(m*(x4-x1) + y1-y4)
-end
-
-function math.sign(x)
-  if x > 0 then
-    return 1
-  elseif x == 0 then
-    return 0
-  elseif x < 0 then
-    return -1
-  end
-end
-
-function geom.angle_with_hint(x1, y1, x2, y2, hint)
-  local result = geom.angle(x1,y1, x2,y2)
-  if hint then
-    -- Smooth the discontinuity where angle goes from positive to negative.
-    -- The hint is a memory of which way we drew it last time.
-    while result > hint+math.pi/10 do
-      result = result-math.pi*2
-    end
-    while result < hint-math.pi/10 do
-      result = result+math.pi*2
-    end
-  end
-  return result
-end
-
--- result is from -π/2 to 3π/2, approximately adding math.atan2 from Lua 5.3
--- (LÖVE is Lua 5.1)
-function geom.angle(x1,y1, x2,y2)
-  local result = math.atan((y2-y1)/(x2-x1))
-  if x2 < x1 then
-    result = result+math.pi
-  end
-  return result
-end
-
--- is the line between x,y and cx,cy at an angle between s and e?
-function geom.angle_between(ox,oy, x,y, s,e)
-  local angle = geom.angle(ox,oy, x,y)
-  if s > e then
-    s,e = e,s
-  end
-  -- I'm not sure this is right or ideal..
-  angle = angle-math.pi*2
-  if s <= angle and angle <= e then
-    return true
-  end
-  angle = angle+math.pi*2
-  if s <= angle and angle <= e then
-    return true
-  end
-  angle = angle+math.pi*2
-  return s <= angle and angle <= e
-end
-
-function geom.dist(x1,y1, x2,y2) return ((x2-x1)^2+(y2-y1)^2)^0.5 end