add bbox construction tests, gamma docstring

src/groovylight/gamma.py

@@ -19,7 +19,7 @@
 # 1. It's free, we don't have to do any math on the board, just adjusting
 #    an existing process.
 # 2. We can go more granular that n-bits of color. This means that the gamma
-#    curve will be effective and accurate regardless of the color depth.
+#    curve will be effective and accurate at a lower color depth.
 #
 # This file contains code to generate these timing adjustments and
 # control/quantify them.
@@ -27,11 +27,11 @@
 from math import pow
 
 
-
 def _gammavec(vals: [float], g: float) -> [float]:
-    return [pow(x,g) for x in vals]
+    return [pow(x, g) for x in vals]
 
-def _nbit_scale(f, nbits:int) -> [float]:
+
+def _nbit_scale(f, nbits: int) -> [float]:
     """Computes the equivalent linear value for each bit of n_bits.
     That is, the list contains scalar values that are doubling as they progress,
     [ x, 2x, 4x ] such that the sum(list) = 7x = f
@@ -40,8 +40,23 @@ def _nbit_scale(f, nbits:int) -> [float]:
     return [base * pow(2.0, x) for x in range(nbits)]
 
 
-def gamma_timings(gamma:float = 2.2, nbits:int = 8, max_clocks: int = 4096):
+def gamma_timings(gamma: float = 2.2, nbits: int = 8, max_clocks: int = 8192):
     """Computes the clock cycle timings for a given gamma correction.
+
+    Parameters
+    ----------
+    gamma : float, optional
+            The gamma value of the resulting timings
+    nbits : int, optional
+            The number of available bit timings. This is used to determine the length of the
+            resulting array
+    max_clocks : int, optional
+            The longest number of clocks to use as a bit-timing.
+
+    Returns
+    -------
+    list of int
+        The per-bit exposure timings, in clock cycles.
     """
     linear_values = _nbit_scale(1.0, nbits)
     gamma_values = _gammavec(linear_values, gamma)
@@ -49,4 +64,3 @@ def gamma_timings(gamma:float = 2.2, nbits:int = 8, max_clocks: int = 4096):
     bclk_ratio = max_clocks / gamma_values[-1]
     result = [round(bclk_ratio * x) for x in gamma_values]
     return result
-

src/groovylight/tests/test_geom.py

@@ -30,3 +30,8 @@ def test_bbox():
     assert not b.contains(Coord(0,0))
     
     # TODO: test .intersect(other)
+
+    with pytest.raises(RuntimeError):
+        BBox(Coord(0,0), Coord(1,0))
+    with pytest.raises(RuntimeError):
+        BBox(Coord(1,1), Coord(0,0))