- re-merged isocurve code
- re-enabled OpenGL on windows, added a config option for enabling/disabling OpenGL - minor bug fixes
This commit is contained in:
Luke Campagnola
parent
543d56f0a6
commit
ad232ff79b
12
__init__.py
12
__init__.py
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@ -9,7 +9,19 @@ from Qt import QtGui
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#if QtGui.QApplication.instance() is None:
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#app = QtGui.QApplication([])
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## in general openGL is poorly supported in Qt.
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## we only enable it where the performance benefit is critical.
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## Note this only applies to 2D graphics; 3D graphics always use OpenGL.
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import sys
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if 'linux' in sys.platform: ## linux has numerous bugs in opengl implementation
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useOpenGL = False
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elif 'darwin' in sys.platform: ## openGL greatly speeds up display on mac
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useOpenGL = True
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else:
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useOpenGL = True ## on windows there's a more even performance / bugginess tradeoff.
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CONFIG_OPTIONS = {
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'useOpenGL': None, ## by default, this is platform-dependent (see widgets/GraphicsView). Set to True or False to explicitly enable/disable opengl.
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'leftButtonPan': True ## if false, left button drags a rubber band for zooming in viewbox
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}
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93
functions.py
93
functions.py
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@ -409,12 +409,12 @@ def affineSlice(data, shape, origin, vectors, axes, **kargs):
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def makeARGB(data, lut=None, levels=None):
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def makeARGB(data, lut=None, levels=None, useRGBA=False):
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"""
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Convert a 2D or 3D array into an ARGB array suitable for building QImages
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Will optionally do scaling and/or table lookups to determine final colors.
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Returns the ARGB array and a boolean indicating whether there is alpha channel data.
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Returns the ARGB array (values 0-255) and a boolean indicating whether there is alpha channel data.
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Arguments:
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data - 2D or 3D numpy array of int/float types
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@ -433,9 +433,10 @@ def makeARGB(data, lut=None, levels=None):
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Lookup tables can be built using GradientWidget.
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levels - List [min, max]; optionally rescale data before converting through the
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lookup table. rescaled = (data-min) * len(lut) / (max-min)
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useRGBA - If True, the data is returned in RGBA order. The default is
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False, which returns in BGRA order for use with QImage.
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"""
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"""
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prof = debug.Profiler('functions.makeARGB', disabled=True)
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## sanity checks
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@ -580,7 +581,11 @@ def makeARGB(data, lut=None, levels=None):
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prof.mark('4')
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if useRGBA:
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order = [0,1,2,3] ## array comes out RGBA
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else:
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order = [2,1,0,3] ## for some reason, the colors line up as BGR in the final image.
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order = [2,1,0,3] ## for some reason, the colors line up as BGR in the final image.
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if data.shape[2] == 1:
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for i in xrange(3):
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@ -732,6 +737,84 @@ def rescaleData(data, scale, offset):
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#return facets
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def isocurve(data, level):
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"""
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Generate isocurve from 2D data using marching squares algorithm.
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*data* 2D numpy array of scalar values
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*level* The level at which to generate an isosurface
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This function is SLOW; plenty of room for optimization here.
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"""
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sideTable = [
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[],
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[0,1],
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[1,2],
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[0,2],
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[0,3],
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[1,3],
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[0,1,2,3],
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[2,3],
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[2,3],
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[0,1,2,3],
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[1,3],
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[0,3],
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[0,2],
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[1,2],
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[0,1],
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[]
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]
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edgeKey=[
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[(0,1),(0,0)],
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[(0,0), (1,0)],
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[(1,0), (1,1)],
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[(1,1), (0,1)]
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]
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lines = []
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## mark everything below the isosurface level
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mask = data < level
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### make four sub-fields and compute indexes for grid cells
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index = np.zeros([x-1 for x in data.shape], dtype=np.ubyte)
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fields = np.empty((2,2), dtype=object)
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slices = [slice(0,-1), slice(1,None)]
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for i in [0,1]:
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for j in [0,1]:
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fields[i,j] = mask[slices[i], slices[j]]
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#vertIndex = i - 2*j*i + 3*j + 4*k ## this is just to match Bourk's vertex numbering scheme
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vertIndex = i+2*j
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#print i,j,k," : ", fields[i,j,k], 2**vertIndex
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index += fields[i,j] * 2**vertIndex
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#print index
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#print index
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## add lines
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for i in xrange(index.shape[0]): # data x-axis
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for j in xrange(index.shape[1]): # data y-axis
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sides = sideTable[index[i,j]]
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for l in range(0, len(sides), 2): ## faces for this grid cell
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edges = sides[l:l+2]
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pts = []
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for m in [0,1]: # points in this face
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p1 = edgeKey[edges[m]][0] # p1, p2 are points at either side of an edge
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p2 = edgeKey[edges[m]][1]
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v1 = data[i+p1[0], j+p1[1]] # v1 and v2 are the values at p1 and p2
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v2 = data[i+p2[0], j+p2[1]]
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f = (level-v1) / (v2-v1)
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fi = 1.0 - f
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p = ( ## interpolate between corners
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p1[0]*fi + p2[0]*f + i + 0.5,
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p1[1]*fi + p2[1]*f + j + 0.5
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)
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pts.append(p)
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lines.append(pts)
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return lines ## a list of pairs of points
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def isosurface(data, level):
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@ -63,6 +63,9 @@ class VTickGroup(UIGraphicsItem):
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#pass
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self.rebuildTicks()
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#self.valid = False
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def dataBounds(self, *args, **kargs):
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return None ## item should never affect view autoscaling
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#def viewRangeChanged(self):
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### called when the view is scaled
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@ -820,13 +820,13 @@ class ViewBox(GraphicsWidget):
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frac = (1.0, 1.0)
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xr = item.dataBounds(0, frac=frac[0])
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yr = item.dataBounds(1, frac=frac[1])
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if xr is None:
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if xr is None or xr == (None, None):
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useX = False
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xr = (0,0)
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if yr is None:
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if yr is None or yr == (None, None):
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useY = False
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yr = (0,0)
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bounds = QtCore.QRectF(xr[0], yr[0], xr[1]-xr[0], yr[1]-yr[0])
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#print " item real:", bounds
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else:
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@ -405,7 +405,7 @@ class ListParameterItem(WidgetParameterItem):
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#return vals[key]
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#else:
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#return key
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print key, self.forward
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#print key, self.forward
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return self.forward[key]
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def setValue(self, val):
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@ -16,6 +16,7 @@ from FileDialog import FileDialog
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from pyqtgraph.GraphicsScene import GraphicsScene
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import numpy as np
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import pyqtgraph.functions as fn
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import pyqtgraph
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__all__ = ['GraphicsView']
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@ -38,20 +39,14 @@ class GraphicsView(QtGui.QGraphicsView):
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autoPixelRange=False. The exact visible range can be set with setRange().
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The view can be panned using the middle mouse button and scaled using the right mouse button if
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enabled via enableMouse()."""
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enabled via enableMouse() (but ordinarily, we use ViewBox for this functionality)."""
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self.closed = False
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QtGui.QGraphicsView.__init__(self, parent)
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## in general openGL is poorly supported in Qt.
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## we only enable it where the performance benefit is critical.
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if useOpenGL is None:
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if 'linux' in sys.platform: ## linux has numerous bugs in opengl implementation
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useOpenGL = False
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elif 'darwin' in sys.platform: ## openGL greatly speeds up display on mac
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useOpenGL = True
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else:
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useOpenGL = False
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useOpenGL = pyqtgraph.getConfigOption('useOpenGL')
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self.useOpenGL(useOpenGL)
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self.setCacheMode(self.CacheBackground)
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