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from OpenGL.GL import * # noqa
from ... import QtGui
from ..GLGraphicsItem import GLGraphicsItem
__all__ = ['GLAxisItem']
class GLAxisItem(GLGraphicsItem):
"""
**Bases:** :class:`GLGraphicsItem <pyqtgraph.opengl.GLGraphicsItem.GLGraphicsItem>`
Displays three lines indicating origin and orientation of local coordinate system.
"""
def __init__(self, size=None, antialias=True, glOptions='translucent', parentItem=None):
super().__init__(parentItem=parentItem)
if size is None:
size = QtGui.QVector3D(1,1,1)
self.antialias = antialias
self.setSize(size=size)
self.setGLOptions(glOptions)
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 paint(self):
#glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
#glEnable( GL_BLEND )
#glEnable( GL_ALPHA_TEST )
self.setupGLState()
if self.antialias:
glEnable(GL_LINE_SMOOTH)
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST)
glBegin( GL_LINES )
x,y,z = self.size()
glColor4f(0, 1, 0, .6) # z is green
glVertex3f(0, 0, 0)
glVertex3f(0, 0, z)
glColor4f(1, 1, 0, .6) # y is yellow
glVertex3f(0, 0, 0)
glVertex3f(0, y, 0)
glColor4f(0, 0, 1, .6) # x is blue
glVertex3f(0, 0, 0)
glVertex3f(x, 0, 0)
glEnd()
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