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import numpy as np
from ...Qt import QtGui
from ... import functions as fn
from ..GLGraphicsItem import GLGraphicsItem
from .GLLinePlotItem import GLLinePlotItem
__all__ = ['GLGridItem']
class GLGridItem(GLGraphicsItem):
"""
**Bases:** :class:`GLGraphicsItem <pyqtgraph.opengl.GLGraphicsItem.GLGraphicsItem>`
Displays a wire-frame grid.
"""
def __init__(self, size=None, color=(255, 255, 255, 76.5), antialias=True, glOptions='translucent', parentItem=None):
super().__init__()
self.lineplot = None # mark that we are still initializing
if size is None:
size = QtGui.QVector3D(20,20,1)
self.setSize(size=size)
self.setSpacing(1, 1, 1)
self.setColor(color)
self.lineplot = GLLinePlotItem(
parentItem=self, glOptions=glOptions, mode='lines', antialias=antialias
)
self.setParentItem(parentItem)
self.updateLines()
def setSize(self, x=None, y=None, z=None, size=None):
"""
Set the size of the axes (in its local coordinate system; this does not affect the transform)
Arguments can be x,y,z or size=QVector3D().
"""
if size is not None:
x = size.x()
y = size.y()
z = size.z()
self.__size = [x,y,z]
self.updateLines()
def size(self):
return self.__size[:]
def setSpacing(self, x=None, y=None, z=None, spacing=None):
"""
Set the spacing between grid lines.
Arguments can be x,y,z or spacing=QVector3D().
"""
if spacing is not None:
x = spacing.x()
y = spacing.y()
z = spacing.z()
self.__spacing = [x,y,z]
self.updateLines()
def spacing(self):
return self.__spacing[:]
def setColor(self, color):
"""Set the color of the grid. Arguments are the same as those accepted by functions.mkColor()"""
self.__color = fn.mkColor(color)
self.updateLines()
def color(self):
return self.__color
def updateLines(self):
if self.lineplot is None:
# still initializing
return
x,y,z = self.size()
xs,ys,zs = self.spacing()
xvals = np.arange(-x/2., x/2. + xs*0.001, xs)
yvals = np.arange(-y/2., y/2. + ys*0.001, ys)
set1 = np.zeros((len(xvals), 6), dtype=np.float32)
set1[:, 0] = xvals
set1[:, 1] = yvals[0]
set1[:, 3] = xvals
set1[:, 4] = yvals[-1]
set2 = np.zeros((len(yvals), 6), dtype=np.float32)
set2[:, 0] = xvals[0]
set2[:, 1] = yvals
set2[:, 3] = xvals[-1]
set2[:, 4] = yvals
pos = np.vstack((set1, set2)).reshape((-1, 3))
self.lineplot.setData(pos=pos, color=self.color())
self.update()
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