Initial data commit

Task/Bitmap-Bresenhams-line-algorithm/Scala/bitmap-bresenhams-line-algorithm.scala

@@ -0,0 +1,24 @@
+object BitmapOps {
+   def bresenham(bm:RgbBitmap, x0:Int, y0:Int, x1:Int, y1:Int, c:Color)={
+      val dx=math.abs(x1-x0)
+      val sx=if (x0<x1) 1 else -1
+      val dy=math.abs(y1-y0)
+      val sy=if (y0<y1) 1 else -1
+
+      def it=new Iterator[Tuple2[Int,Int]]{
+         var x=x0; var y=y0
+         var err=(if (dx>dy) dx else -dy)/2
+         def next={
+            val res=(x,y)
+            val e2=err;
+            if (e2 > -dx) {err-=dy; x+=sx}
+            if (e2<dy) {err+=dx; y+=sy}
+            res;
+         }
+         def hasNext = (sx*x <= sx*x1 && sy*y <= sy*y1)
+      }
+
+      for((x,y) <- it)
+         bm.setPixel(x, y, c)
+   }
+}