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Merge branch 'fix-add_primitive-rotation' into 'development' 

Avoids coordinate normalization _before_ rotation

See merge request damask/DAMASK!276
This commit is contained in:
Martin Diehl 2020-11-13 14:11:54 +01:00
parent 1f59f63011 7b7b449877
commit bacfe9f462
2 changed files with 21 additions and 19 deletions
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30
python/damask/_geom.py
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@ -564,14 +564,14 @@ class Geom:
If given as floats, coordinates are addressed.
center : int or float numpy.ndarray of shape (3)
Center of the primitive. If given as integers, grid point
locations (cell centers) are addressed.
If given as floats, coordinates are addressed.
coordinates (cell centers) are addressed.
If given as floats, coordinates in space are addressed.
exponent : numpy.ndarray of shape (3) or float
Exponents for the three axes.
0 gives octahedron (ǀxǀ^(2^0) + ǀyǀ^(2^0) + ǀzǀ^(2^0) < 1)
1 gives sphere (ǀxǀ^(2^1) + ǀyǀ^(2^1) + ǀzǀ^(2^1) < 1)
fill : int, optional
Fill value for primitive. Defaults to material.max() + 1.
Fill value for primitive. Defaults to material.max()+1.
R : damask.Rotation, optional
Rotation of primitive. Defaults to no rotation.
inverse : Boolean, optional
@ -581,25 +581,27 @@ class Geom:
Repeat primitive over boundaries. Defaults to True.
"""
# normalized 'radius' and center
r = np.array(dimension)/self.grid/2.0 if np.array(dimension).dtype in np.sctypes['int'] else \
np.array(dimension)/self.size/2.0
c = (np.array(center) + .5)/self.grid if np.array(center).dtype in np.sctypes['int'] else \
(np.array(center) - self.origin)/self.size
# radius and center
r = np.array(dimension)/2.0*self.size/self.grid if np.array(dimension).dtype in np.sctypes['int'] else \
np.array(dimension)/2.0
c = (np.array(center) + .5)*self.size/self.grid if np.array(center).dtype in np.sctypes['int'] else \
(np.array(center) - self.origin)
coords = grid_filters.cell_coord0(self.grid,np.ones(3)) \
- ((np.ones(3)-(1./self.grid if np.array(center).dtype in np.sctypes['int'] else 0))*0.5 if periodic else c) # periodic center is always at CoG
coords = grid_filters.cell_coord0(self.grid,self.size,
-(0.5*(self.size + (self.size/self.grid
if np.array(center).dtype in np.sctypes['int'] else
0)) if periodic else c))
coords_rot = R.broadcast_to(tuple(self.grid))@coords
with np.errstate(all='ignore'):
mask = np.sum(np.power(coords_rot/r,2.0**np.array(exponent)),axis=-1) > 1.0
if periodic: # translate back to center
mask = np.roll(mask,((c-np.ones(3)*.5)*self.grid).astype(int),(0,1,2))
mask = np.roll(mask,((c/self.size-0.5)*self.grid).round().astype(int),(0,1,2))
fill_ = np.full_like(self.material,np.nanmax(self.material)+1 if fill is None else fill)
return Geom(material = np.where(np.logical_not(mask) if inverse else mask, self.material,fill_),
return Geom(material = np.where(np.logical_not(mask) if inverse else mask,
self.material,
np.nanmax(self.material)+1 if fill is None else fill),
size = self.size,
origin = self.origin,
comments = self.comments+[util.execution_stamp('Geom','add_primitive')],

10
python/tests/test_Geom.py
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@ -265,12 +265,12 @@ class TestGeom:
@pytest.mark.parametrize('inverse',[True,False])
@pytest.mark.parametrize('periodic',[True,False])
def test_add_primitive_rotation(self,center,inverse,periodic):
"""Rotation should not change result for sphere (except for discretization errors)."""
g = np.array([32,32,32])
"""Rotation should not change result for sphere."""
g = np.random.randint(8,32,(3))
s = np.random.random(3)+.5
fill = np.random.randint(10)+2
eu=np.array([np.random.randint(4),np.random.randint(2),np.random.randint(4)])*.5*np.pi
G_1 = Geom(np.ones(g,'i'),[1.,1.,1.]).add_primitive(.3,center,1,fill,inverse=inverse,periodic=periodic)
G_2 = Geom(np.ones(g,'i'),[1.,1.,1.]).add_primitive(.3,center,1,fill,Rotation.from_Eulers(eu),inverse,periodic=periodic)
G_1 = Geom(np.ones(g,'i'),s).add_primitive(.3,center,1,fill,inverse=inverse,periodic=periodic)
G_2 = Geom(np.ones(g,'i'),s).add_primitive(.3,center,1,fill,Rotation.from_random(),inverse,periodic=periodic)
assert geom_equal(G_1,G_2)