Add additional math methods (#140)

Author: tychedelia

crates/processing_pyo3/mewnala/__init__.py

@@ -5,13 +5,21 @@
 # the internal structure of the native module
 import sys as _sys
 from . import mewnala as _native
+
 for _name in ("math",):
     _sub = getattr(_native, _name, None)
     if _sub is not None:
         _sys.modules[f"{__name__}.{_name}"] = _sub
 
+_color = getattr(_native, "color", None)
+if _color is not None:
+    _sys.modules[f"{__name__}.color"] = _color
+
+from . import math  # noqa: E402  (Python submodule, extends native math)
+from .math import *  # noqa: E402,F401,F403
+
 # global var handling. for wildcard import of our module, we copy into globals, otherwise
-# we dispatch to get attr and call the underlying getter method 
+# we dispatch to get attr and call the underlying getter method
 
 _DYNAMIC_GRAPHICS_ATTRS = (
     "width",
@@ -106,7 +114,6 @@ def __getattr__(name):
 def __dir__():
     return sorted(set(list(globals().keys()) + list(_DYNAMIC)))
 
-
 __all__ = sorted(
     {n for n in dir(_native) if not n.startswith("_")} | set(_DYNAMIC)
 )

crates/processing_pyo3/mewnala/math.py

@@ -0,0 +1,127 @@
+"""Processing math methods and vector/quaternion types."""
+import math as _math
+from .mewnala import math as _native_math
+from math import (
+    sin, cos, tan,
+    atan, atan2,
+    ceil, floor,
+    degrees, radians,
+)
+
+Vec2 = _native_math.Vec2
+Vec3 = _native_math.Vec3
+Vec4 = _native_math.Vec4
+Quat = _native_math.Quat
+VecIter = _native_math.PyVecIter
+vec2 = _native_math.vec2
+vec3 = _native_math.vec3
+vec4 = _native_math.vec4
+quat = _native_math.quat
+
+_NAN = float("nan")
+_INF = float("inf")
+
+
+def _safe_div(num, den):
+    if den == 0:
+        if num == 0:
+            return _NAN
+        return _INF if num > 0 else -_INF
+    return num / den
+
+
+def sq(x):
+    return x * x
+
+
+def pow(base, exponent):
+    if base < 0 and not float(exponent).is_integer():
+        return _NAN
+    try:
+        return base ** exponent
+    except (OverflowError, ZeroDivisionError):
+        return _INF
+
+
+def sqrt(x):
+    if x < 0:
+        return _NAN
+    return _math.sqrt(x)
+
+
+def exp(x):
+    try:
+        return _math.exp(x)
+    except OverflowError:
+        return _INF
+
+
+def log(x):
+    if x == 0:
+        return -_INF
+    if x < 0:
+        return _NAN
+    return _math.log(x)
+
+
+def asin(x):
+    if x < -1 or x > 1:
+        return _NAN
+    return _math.asin(x)
+
+
+def acos(x):
+    if x < -1 or x > 1:
+        return _NAN
+    return _math.acos(x)
+
+
+def round(x):
+    return _math.floor(x + 0.5)
+
+
+def constrain(value, low, high):
+    if value < low:
+        return low
+    if value > high:
+        return high
+    return value
+
+
+def lerp(start, stop, amt):
+    return start + (stop - start) * amt
+
+
+def norm(value, start, stop):
+    return _safe_div(value - start, stop - start)
+
+
+def remap(value, start1, stop1, start2, stop2, within_bounds=False):
+    mapped = start2 + (stop2 - start2) * _safe_div(value - start1, stop1 - start1)
+    if not within_bounds:
+        return mapped
+    if start2 < stop2:
+        return constrain(mapped, start2, stop2)
+    return constrain(mapped, stop2, start2)
+
+
+def mag(*args):
+    if len(args) == 2:
+        a, b = args
+        return sqrt(a * a + b * b)
+    if len(args) == 3:
+        a, b, c = args
+        return sqrt(a * a + b * b + c * c)
+    raise TypeError(f"mag() takes 2 or 3 arguments ({len(args)} given)")
+
+
+def dist(*args):
+    if len(args) == 4:
+        x1, y1, x2, y2 = args
+        dx, dy = x2 - x1, y2 - y1
+        return sqrt(dx * dx + dy * dy)
+    if len(args) == 6:
+        x1, y1, z1, x2, y2, z2 = args
+        dx, dy, dz = x2 - x1, y2 - y1, z2 - z1
+        return sqrt(dx * dx + dy * dy + dz * dz)
+    raise TypeError(f"dist() takes 4 or 6 arguments ({len(args)} given)")