pyqtgraph/opengl/items/GLAxisItem.py
Luke Campagnola c07a92efbe Reorganized directory structure to be more standard
Started new SVG exporter
Merged updates from ACQ4
2012-12-25 00:43:31 -05:00

59 lines
1.6 KiB
Python

from OpenGL.GL import *
from .. GLGraphicsItem import GLGraphicsItem
from pyqtgraph import QtGui
__all__ = ['GLAxisItem']
class GLAxisItem(GLGraphicsItem):
"""
**Bases:** :class:`GLGraphicsItem <pyqtgraph.opengl.GLGraphicsItem>`
Displays three lines indicating origin and orientation of local coordinate system.
"""
def __init__(self, size=None):
GLGraphicsItem.__init__(self)
if size is None:
size = QtGui.QVector3D(1,1,1)
self.setSize(size=size)
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 )
glEnable( GL_POINT_SMOOTH )
#glDisable( GL_DEPTH_TEST )
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()