Implementation.md

@@ -59,4 +59,26 @@ This base size is the required size for all paddings. The required size can now
 
 ```
 reqSize(thickness) = baseSize + b * tickness
-```
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+```
+
+Of course a limit for the total size by the available chart area `availableSize`. This means:
+```
+reqSize(thickness) <= availableSize
+baseSize + b * tickness <= availableSize
+
+// minus baseSize
+b * tickness <= (availableSize - baseSize)
+
+// divide by total amount of bars b
+tickness <= (availableSize - baseSize) / b
+
+// The maximum possible thickness is wanted. But it also must be a whole number.
+
+thickness = floor((availableSize - baseSize) / b)
+```
+
+So the software will calculate the baseSize for the given `g, gpad, b, bpad` and then calculate the actual bar thickness complying with the user defined maximum:
+
+`thickness = min(floor((availableSize - baseSize) / b), maxThickness)`
+
+In the case of `thickness < minThickness` an exception will be thrown stating that there is not enough space available.
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