82 lines
2.8 KiB
Python
82 lines
2.8 KiB
Python
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from OpenGL.GL import *
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from OpenGL.arrays import vbo
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from .. GLGraphicsItem import GLGraphicsItem
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from .. import shaders
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from pyqtgraph import QtGui
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import numpy as np
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__all__ = ['GLLinePlotItem']
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class GLLinePlotItem(GLGraphicsItem):
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"""Draws line plots in 3D."""
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def __init__(self, **kwds):
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GLGraphicsItem.__init__(self)
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glopts = kwds.pop('glOptions', 'additive')
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self.setGLOptions(glopts)
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self.pos = None
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self.width = 1.
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self.color = (1.0,1.0,1.0,1.0)
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self.setData(**kwds)
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def setData(self, **kwds):
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"""
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Update the data displayed by this item. All arguments are optional;
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for example it is allowed to update spot positions while leaving
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colors unchanged, etc.
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==================== ==================================================
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Arguments:
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------------------------------------------------------------------------
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pos (N,3) array of floats specifying point locations.
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color tuple of floats (0.0-1.0) specifying
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a color for the entire item.
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width float specifying line width
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==================== ==================================================
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"""
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args = ['pos', 'color', 'width', 'connected']
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for k in kwds.keys():
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if k not in args:
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raise Exception('Invalid keyword argument: %s (allowed arguments are %s)' % (k, str(args)))
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for arg in args:
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if arg in kwds:
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setattr(self, arg, kwds[arg])
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#self.vbo.pop(arg, None)
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self.update()
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def initializeGL(self):
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pass
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#def setupGLState(self):
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#"""Prepare OpenGL state for drawing. This function is called immediately before painting."""
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##glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ## requires z-sorting to render properly.
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#glBlendFunc(GL_SRC_ALPHA, GL_ONE)
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#glEnable( GL_BLEND )
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#glEnable( GL_ALPHA_TEST )
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#glDisable( GL_DEPTH_TEST )
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##glEnable( GL_POINT_SMOOTH )
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##glHint(GL_POINT_SMOOTH_HINT, GL_NICEST)
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##glPointParameterfv(GL_POINT_DISTANCE_ATTENUATION, (0, 0, -1e-3))
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##glPointParameterfv(GL_POINT_SIZE_MAX, (65500,))
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##glPointParameterfv(GL_POINT_SIZE_MIN, (0,))
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def paint(self):
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if self.pos is None:
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return
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self.setupGLState()
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glEnableClientState(GL_VERTEX_ARRAY)
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try:
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glVertexPointerf(self.pos)
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glColor4f(*self.color)
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glPointSize(self.width)
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glDrawArrays(GL_LINE_STRIP, 0, self.pos.size / self.pos.shape[-1])
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finally:
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glDisableClientState(GL_VERTEX_ARRAY)
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