Slowly adding basic functionality

mandelbrot.nim

@@ -1,8 +1,26 @@
-import complex, colors
+import math, complex, colors
 
-
-proc getComplexValueForPixel(x:int, y:int, height:int, width:int, zoom:float): Complex =
-    (re: (x-width/2.0)/zoom, im: (y-height/2.0)/zoom)
+proc getComplexValueForPixel(x:int, y:int, height:int, width:int, zoom:float64): Complex[float64] =
+    complex.complex64((x.float64-width.float64/2.0'f64)/zoom, (y.float64-height.float64/2.0'f64)/zoom)
 
 proc colorMap(i:int, nMax:int): Color =
     rgb(0, 0, 0)
+
+proc generatePixel(x:int, y:int, height:int, width:int, zoom:float64,
+                   rMax: int, maxIter:int) : Color =
+   let c = getComplexValueForPixel(x, y, height, width, zoom)
+
+   var
+      n = 0
+      z = complex64(0'f64, 0'f64)
+
+   for i in 0..maxIter:
+      if z.abs >= rMax.float64:
+         n = i
+         break
+      z = c + z * z
+   
+   result = colorMap(n, maxIter)
+
+proc generateImage(width:int, height:int, zoom:float64, rMax:int, maxIter:int) =
+   discard nil