Initial commit

line.lua

@@ -0,0 +1,50 @@
+require "gridpoint"
+
+-- Line table, interactive game object
+-- NOTE: uses GridPoint
+Line = {}
+
+-- Factory function
+function Line:new( startpoint, endpoint, color )
+    local line = {
+        startpoint = startpoint,
+        endpoint = endpoint,
+        points = {
+            startpoint
+        },
+        color = color
+    }
+
+    setmetatable( line, { __index = self } )
+
+    return line
+end
+
+-- Push point to the end of points stack
+function Line:push( point )
+    table.insert( self.points, point )
+end
+
+-- Pop point from points stack
+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 )
+    -- 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