i found the answer after some rest :-)
import numpy as np
import pyqtgraph as pg
# define a symbol bowtie style
_mos = np.asarray([
[0.5, 0.25],
[0.5, -0.25],
[-0.5, 0.25],
[-0.5, -0.25],
[0.5, 0.25]
])
my_symbol = pg.arrayToQPath(_mos[:, 0], _mos[:, 1], connect='all')
# define color and stuff for your items
exit_item = pg.ScatterPlotItem(
size=20,
pen=pg.mkPen(128, 128, 128, 255),
brush=pg.mkBrush(255, 255, 255, 255),
)
# calculate angle between two sets of points
angle = np.arctan2(np.asarray(y1-y0), np.asarray(x1-x0)) * 180/np.pi
# rotate symbol with that angle
tr = QTransform()
angle_rot = tr.rotate(angle)
my_rotated_symbol = angle_rot.map(my_symbol)
# may be a whole list of spots with different angles and positions
exit_spots = []
exit_spots.append({
'pos': (0, 0),
'symbol': my_rotated_symbol
})
# add the spots to the item
exit_item.addPoints(exit_spots)
# create a plot and add the content
win = pg.GraphicsWindow()
plot = win.addPlot()
plot.addItem(exit_item)
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