59 lines
1.6 KiB
Python
59 lines
1.6 KiB
Python
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from OpenGL.GL import *
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from .. GLGraphicsItem import GLGraphicsItem
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from pyqtgraph import QtGui
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__all__ = ['GLAxisItem']
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class GLAxisItem(GLGraphicsItem):
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"""
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**Bases:** :class:`GLGraphicsItem <pyqtgraph.opengl.GLGraphicsItem>`
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Displays three lines indicating origin and orientation of local coordinate system.
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"""
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def __init__(self, size=None):
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GLGraphicsItem.__init__(self)
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if size is None:
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size = QtGui.QVector3D(1,1,1)
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self.setSize(size=size)
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def setSize(self, x=None, y=None, z=None, size=None):
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"""
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Set the size of the axes (in its local coordinate system; this does not affect the transform)
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Arguments can be x,y,z or size=QVector3D().
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"""
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if size is not None:
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x = size.x()
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y = size.y()
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z = size.z()
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self.__size = [x,y,z]
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self.update()
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def size(self):
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return self.__size[:]
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def paint(self):
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
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glEnable( GL_BLEND )
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glEnable( GL_ALPHA_TEST )
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glEnable( GL_POINT_SMOOTH )
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#glDisable( GL_DEPTH_TEST )
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glBegin( GL_LINES )
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x,y,z = self.size()
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glColor4f(0, 1, 0, .6) # z is green
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glVertex3f(0, 0, 0)
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glVertex3f(0, 0, z)
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glColor4f(1, 1, 0, .6) # y is yellow
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glVertex3f(0, 0, 0)
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glVertex3f(0, y, 0)
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glColor4f(0, 0, 1, .6) # x is blue
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glVertex3f(0, 0, 0)
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glVertex3f(x, 0, 0)
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glEnd()
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