Commit 5374afec authored by Luke Campagnola's avatar Luke Campagnola
Browse files

Added basic 3D line plot class

parent 51e88bd4
# -*- coding: utf-8 -*-
## Add path to library (just for examples; you do not need this)
import sys, os
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', '..'))
from pyqtgraph.Qt import QtCore, QtGui
import pyqtgraph.opengl as gl
import pyqtgraph as pg
import numpy as np
app = QtGui.QApplication([])
w = gl.GLViewWidget()
w.opts['distance'] = 40
w.show()
gx = gl.GLGridItem()
gx.rotate(90, 0, 1, 0)
gx.translate(-10, 0, 0)
w.addItem(gx)
gy = gl.GLGridItem()
gy.rotate(90, 1, 0, 0)
gy.translate(0, -10, 0)
w.addItem(gy)
gz = gl.GLGridItem()
gz.translate(0, 0, -10)
w.addItem(gz)
def fn(x, y):
return np.cos((x**2 + y**2)**0.5)
n = 51
y = np.linspace(-10,10,n)
x = np.linspace(-10,10,100)
for i in range(n):
yi = np.array([y[i]]*100)
d = (x**2 + yi**2)**0.5
z = 10 * np.cos(d) / (d+1)
pts = np.vstack([x,yi,z]).transpose()
plt = gl.GLLinePlotItem(pos=pts, color=pg.glColor((i,n*1.3)))
w.addItem(plt)
## Start Qt event loop unless running in interactive mode.
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()
from OpenGL.GL import *
from OpenGL.arrays import vbo
from .. GLGraphicsItem import GLGraphicsItem
from .. import shaders
from pyqtgraph import QtGui
import numpy as np
__all__ = ['GLLinePlotItem']
class GLLinePlotItem(GLGraphicsItem):
"""Draws line plots in 3D."""
def __init__(self, **kwds):
GLGraphicsItem.__init__(self)
glopts = kwds.pop('glOptions', 'additive')
self.setGLOptions(glopts)
self.pos = None
self.width = 1.
self.color = (1.0,1.0,1.0,1.0)
self.setData(**kwds)
def setData(self, **kwds):
"""
Update the data displayed by this item. All arguments are optional;
for example it is allowed to update spot positions while leaving
colors unchanged, etc.
==================== ==================================================
Arguments:
------------------------------------------------------------------------
pos (N,3) array of floats specifying point locations.
color tuple of floats (0.0-1.0) specifying
a color for the entire item.
width float specifying line width
==================== ==================================================
"""
args = ['pos', 'color', 'width', 'connected']
for k in kwds.keys():
if k not in args:
raise Exception('Invalid keyword argument: %s (allowed arguments are %s)' % (k, str(args)))
for arg in args:
if arg in kwds:
setattr(self, arg, kwds[arg])
#self.vbo.pop(arg, None)
self.update()
def initializeGL(self):
pass
#def setupGLState(self):
#"""Prepare OpenGL state for drawing. This function is called immediately before painting."""
##glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ## requires z-sorting to render properly.
#glBlendFunc(GL_SRC_ALPHA, GL_ONE)
#glEnable( GL_BLEND )
#glEnable( GL_ALPHA_TEST )
#glDisable( GL_DEPTH_TEST )
##glEnable( GL_POINT_SMOOTH )
##glHint(GL_POINT_SMOOTH_HINT, GL_NICEST)
##glPointParameterfv(GL_POINT_DISTANCE_ATTENUATION, (0, 0, -1e-3))
##glPointParameterfv(GL_POINT_SIZE_MAX, (65500,))
##glPointParameterfv(GL_POINT_SIZE_MIN, (0,))
def paint(self):
if self.pos is None:
return
self.setupGLState()
glEnableClientState(GL_VERTEX_ARRAY)
try:
glVertexPointerf(self.pos)
glColor4f(*self.color)
glPointSize(self.width)
glDrawArrays(GL_LINE_STRIP, 0, self.pos.size / self.pos.shape[-1])
finally:
glDisableClientState(GL_VERTEX_ARRAY)
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