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Performance improvements in Genome.__init__()

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This commit is contained in:
Steven Robertson 2011-10-12 13:57:43 -04:00
parent 0f615bd98b
commit f04ad7ab68
1 changed files with 16 additions and 9 deletions
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25
cuburn/render.py
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@ -43,31 +43,36 @@ class Genome(object):
dens = np.array([x.density for i, x in enumerate(self.xforms) dens = np.array([x.density for i, x in enumerate(self.xforms)
if i != self.final_xform_index]) if i != self.final_xform_index])
###############
# Chaos support
num_std_xf = len(dens) num_std_xf = len(dens)
self.chaos_densities = np.zeros( (num_std_xf,num_std_xf) ) self.chaos_densities = np.zeros( (num_std_xf,num_std_xf) )
for r in range(num_std_xf): for r in range(num_std_xf):
chaos_row = np.array([ctypes_genome.chaos[r][c] for c in range(num_std_xf)]) chaos_row = np.array([ctypes_genome.chaos[r][c]
for c in range(num_std_xf)])
chaos_row = chaos_row * dens chaos_row = chaos_row * dens
chaos_row /= np.sum(chaos_row) chaos_row /= np.sum(chaos_row)
chaos_row = [np.sum(chaos_row[:i+1]) for i in range(len(dens))] chaos_row = np.cumsum(chaos_row)
self.chaos_densities[r,:] = chaos_row self.chaos_densities[r,:] = chaos_row
###############
dens /= np.sum(dens) dens /= np.sum(dens)
self.norm_density = [np.sum(dens[:i+1]) for i in range(len(dens))] self.norm_density = np.cumsum(dens)
self.camera_transform = self.calc_camera_transform()
# For performance reasons, defer this calculation
self._camera_transform = None
scale = property(lambda cp: 2.0 ** cp.zoom) scale = property(lambda cp: 2.0 ** cp.zoom)
adj_density = property(lambda cp: cp.sample_density * (cp.scale ** 2)) adj_density = property(lambda cp: cp.sample_density * (cp.scale ** 2))
ppu = property(lambda cp: cp.pixels_per_unit * cp.scale) ppu = property(lambda cp: cp.pixels_per_unit * cp.scale)
def calc_camera_transform(cp): @property
def camera_transform(self):
""" """
An affine matrix which will transform IFS coordinates to image width An affine matrix which will transform IFS coordinates to image width
and height. Assumes that width and height are constant. and height. Assumes that width and height are constant.
""" """
cp = self
if self._camera_transform is not None:
return self._camera_transform
g = Features.gutter g = Features.gutter
if cp.estimator: if cp.estimator:
# The filter shifts by this amount as a side effect of it being # The filter shifts by this amount as a side effect of it being
@ -75,12 +80,14 @@ class Genome(object):
# TODO: this will be weird in an animation where one endpoint has # TODO: this will be weird in an animation where one endpoint has
# a radius of 0, and the other does not # a radius of 0, and the other does not
g -= Features.gutter / 2 - 1 g -= Features.gutter / 2 - 1
return ( affine.translate(0.5 * cp.width + g, 0.5 * cp.height + g) self._camera_transform = (
affine.translate(0.5 * cp.width + g, 0.5 * cp.height + g)
* affine.scale(cp.ppu, cp.ppu) * affine.scale(cp.ppu, cp.ppu)
* affine.translate(-cp._center[0], -cp._center[1]) * affine.translate(-cp._center[0], -cp._center[1])
* affine.rotate(cp.rotate * 2 * np.pi / 360, * affine.rotate(cp.rotate * 2 * np.pi / 360,
cp.rot_center[0], cp.rot_center[0],
cp.rot_center[1]) ) cp.rot_center[1]) )
return self._camera_transform
class Animation(object): class Animation(object):
""" """