79 lines
2.2 KiB
Python
79 lines
2.2 KiB
Python
import numpy as np
|
|
|
|
from OpenGL.GL import *
|
|
from .. GLGraphicsItem import GLGraphicsItem
|
|
from ... import QtGui
|
|
|
|
__all__ = ['GLGridItem']
|
|
|
|
class GLGridItem(GLGraphicsItem):
|
|
"""
|
|
**Bases:** :class:`GLGraphicsItem <pyqtgraph.opengl.GLGraphicsItem>`
|
|
|
|
Displays a wire-grame grid.
|
|
"""
|
|
|
|
def __init__(self, size=None, color=None, antialias=True, glOptions='translucent'):
|
|
GLGraphicsItem.__init__(self)
|
|
self.setGLOptions(glOptions)
|
|
self.antialias = antialias
|
|
if size is None:
|
|
size = QtGui.QVector3D(20,20,1)
|
|
self.setSize(size=size)
|
|
self.setSpacing(1, 1, 1)
|
|
|
|
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.update()
|
|
|
|
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.update()
|
|
|
|
def spacing(self):
|
|
return self.__spacing[:]
|
|
|
|
def paint(self):
|
|
self.setupGLState()
|
|
|
|
if self.antialias:
|
|
glEnable(GL_LINE_SMOOTH)
|
|
glEnable(GL_BLEND)
|
|
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
|
|
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST)
|
|
|
|
glBegin( GL_LINES )
|
|
|
|
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)
|
|
glColor4f(1, 1, 1, .3)
|
|
for x in xvals:
|
|
glVertex3f(x, yvals[0], 0)
|
|
glVertex3f(x, yvals[-1], 0)
|
|
for y in yvals:
|
|
glVertex3f(xvals[0], y, 0)
|
|
glVertex3f(xvals[-1], y, 0)
|
|
|
|
glEnd()
|