Optimize XY rotation, sin and cos may be calculated only once per angle change.
From: Alexey Starikovskiy <[email protected]>
---
lib/python/rs274/interpret.py | 30 +++++++++++++++---------------
1 files changed, 15 insertions(+), 15 deletions(-)
diff --git a/lib/python/rs274/interpret.py b/lib/python/rs274/interpret.py
index b1007bd..d223be5 100644
--- a/lib/python/rs274/interpret.py
+++ b/lib/python/rs274/interpret.py
@@ -19,12 +19,12 @@ import math
class Translated:
offset_x = offset_y = offset_z = offset_a = offset_b = offset_c = 0
rotation_xy = 0
+ rotation_sin = 0
+ rotation_cos = 1
def rotate_and_translate(self, x,y,z,a,b,c,u,v,w):
- t = self.rotation_xy
- if t:
- t = math.radians(t)
- rotx = x * math.cos(t) - y * math.sin(t)
- y = x * math.sin(t) + y * math.cos(t)
+ if self.rotation_xy:
+ rotx = x * self.rotation_cos - y * self.rotation_sin
+ y = x * self.rotation_sin + y * self.rotation_cos
x = rotx
return [x+self.offset_x, y+self.offset_y, z+self.offset_z,
@@ -47,6 +47,9 @@ class Translated:
self.offset_w = offset_w
def set_xy_rotation(self, theta):
self.rotation_xy = theta
+ t = math.radians(theta)
+ self.rotation_sin = math.sin(t)
+ self.rotation_cos = math.cos(t)
class ArcsToSegmentsMixin:
plane = 1
@@ -56,17 +59,14 @@ class ArcsToSegmentsMixin:
def arc_feed(self, x1, y1, cx, cy, rot, z1, a, b, c, u, v, w):
if self.plane == 1:
- t = self.rotation_xy
- if t:
- t = math.radians(t)
- rotx = x1 * math.cos(t) - y1 * math.sin(t)
- roty = x1 * math.sin(t) + y1 * math.cos(t)
- x1 = rotx
- y1 = roty
+ if self.rotation_xy:
+ rotx = x1 * self.rotation_cos - y1 * self.rotation_sin
+ y1 = x1 * self.rotation_sin + y1 * self.rotation_cos
+ x1 = rotx
f = n = [x1+self.offset_x,y1+self.offset_y,z1+self.offset_z, a+self.offset_a, b+self.offset_b, c+self.offset_c, u+self.offset_u, v+self.offset_v, w+self.offset_w]
- if t:
- rotcx = cx * math.cos(t) - cy * math.sin(t)
- rotcy = cx * math.sin(t) + cy * math.cos(t)
+ if self.rotation_xy:
+ rotcx = cx * self.rotation_cos - cy * self.rotation_sin
+ rotcy = cx * self.rotation_sin + cy * self.rotation_cos
cx = rotcx
cy = rotcy
cx += self.offset_x
------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
_______________________________________________
Emc-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-developers
