Actors example Mandelbrot fixes

Signed-off-by: BlackMinou <romain.chanoir@viacesi.fr>

diff --git a/lib/actors/examples/mandelbrot/mandelbrot.nit b/lib/actors/examples/mandelbrot/mandelbrot.nit
index 316b54a..e04d4ec 100644 (file)
--- a/lib/actors/examples/mandelbrot/mandelbrot.nit
+++ b/lib/actors/examples/mandelbrot/mandelbrot.nit
@@ -34,7 +34,7 @@ class Worker
                        var zi2 = cib[y]
 
                        var b = 0
-                       for j in [0..49[ do
+                       for j in [0..nb_rounds[ do
                                var nzr1 = zr1 * zr1 - zi1 * zi1 + crb[x+i]
                                var nzi1 = zr1 * zi1 + zr1 * zi1 + cib[y]
                                zr1 = nzr1
@@ -62,11 +62,7 @@ class Worker
                var line = 0
                loop
                        line = atomic.get_and_increment
-                       if line < n then
-                               put_line(line, data[line])
-                       else
-                               break
-                       end
+                       if line < n then put_line(line, data[line]) else break
                end
        end
 end
@@ -79,23 +75,22 @@ redef class Sys
        var cib: Array[Float] is noautoinit
        var atomic = new AtomicInt(0)
        var nb_threads = 8
+       # How many time do we iterate before deciding if the number
+       # is in the mandelbrot set or not
+       var nb_rounds  = 49
 end
 
-if args.is_empty then
-       n = 200
-else
-       n = args[0].to_i
-end
+n = if args.is_empty then 200 else args[0].to_i
 
-sys.crb = new Array[Float].with_capacity(n + 7)
-sys.cib = new Array[Float].with_capacity(n + 7)
+sys.crb = new Array[Float].with_capacity(n)
+sys.cib = new Array[Float].with_capacity(n)
 sys.inv_n = 2.0 / n.to_f
 for i in [0..n[ do
        sys.cib[i] = i.to_f * inv_n - 1.0
        sys.crb[i] = i.to_f * inv_n - 1.5
 end
 sys.data = new Array[Array[Byte]].with_capacity(n)
-for i in [0..n[ do sys.data[i] = new Array[Byte].filled_with(0.to_b, (n + 7) / 8)
+for i in [0..n[ do sys.data[i] = new Array[Byte].filled_with(0.to_b, (n) / 8)
 
 # Parallel Approach
 var actors = new Array[Worker]