96 lines
2.3 KiB
Lua
96 lines
2.3 KiB
Lua
require "gridpoint"
|
|
|
|
-- Interactive game object
|
|
---@class Line
|
|
---@field startpoint GridPoint
|
|
---@field endpoint GridPoint
|
|
---@field points GridPoint[]
|
|
---@field color Color
|
|
Line = {
|
|
|
|
startpoint = GridPoint:new( GridPoint:coords() ),
|
|
endpoint = GridPoint:new( GridPoint:coords() ),
|
|
points = { },
|
|
color = Color.red
|
|
}
|
|
|
|
-- Factory function
|
|
---@param startpoint GridPoint
|
|
---@param endpoint GridPoint
|
|
---@param color Color
|
|
---@return Line
|
|
function Line:new( startpoint, endpoint, color )
|
|
local line = {
|
|
startpoint = startpoint or self.startpoint,
|
|
endpoint = endpoint or self.endpoint,
|
|
points = {
|
|
startpoint or self.startpoint
|
|
},
|
|
color = color or self.color
|
|
}
|
|
|
|
setmetatable( line, { __index = self } )
|
|
|
|
return line
|
|
end
|
|
|
|
-- Push point to the end of points stack
|
|
---@param point GridPoint
|
|
function Line:push( point )
|
|
table.insert( self.points, point )
|
|
end
|
|
|
|
-- Pop point from points stack
|
|
---@return GridPoint
|
|
function Line:pop()
|
|
return table.remove( self.points )
|
|
end
|
|
|
|
-- Draw line with connected dots
|
|
function Line:draw()
|
|
love.graphics.setColor( self.color )
|
|
-- Draw start and end points (should look like rings)
|
|
local sx, sy = self.startpoint:globalCoords()
|
|
love.graphics.circle( "fill", sx, sy, Config.linePointRadius )
|
|
local ex, ey = self.endpoint:globalCoords()
|
|
love.graphics.circle( "fill", ex, ey, Config.linePointRadius )
|
|
if #self.points <= 1 then
|
|
love.graphics.setColor( Color.white )
|
|
return
|
|
end
|
|
-- Draw line
|
|
local points = {}
|
|
for _, point in ipairs( self.points ) do
|
|
local x, y = point:globalCoords()
|
|
table.insert( points, x )
|
|
table.insert( points, y )
|
|
end
|
|
love.graphics.line( points )
|
|
love.graphics.setColor( Color.white )
|
|
end
|
|
|
|
-- Clear points
|
|
function Line:clear()
|
|
for k, _ in pairs( self.points ) do
|
|
self.points[k] = nil
|
|
end
|
|
end
|
|
|
|
-- Swap startpoint and endpoint
|
|
function Line:reverse()
|
|
local swap = self.startpoint
|
|
self.startpoint = self.endpoint
|
|
self.endpoint = swap
|
|
self:push( self.startpoint )
|
|
end
|
|
|
|
-- Check if line has the exact point
|
|
---@param point GridPoint
|
|
---@return boolean
|
|
function Line:has( point )
|
|
return TableHas( self.points, point,
|
|
function( value, innervalue )
|
|
return innervalue:equals( value )
|
|
end
|
|
)
|
|
end
|