How to disable rotation in interactive Plotter?

[baba-yaga]

Hello,
I wrote a small function to identify the pixel coordinates of a click on a picture. Nicely, it allows to zoom in the picture to get a more accurate placement of the click. This is however, screwed up if I accidentally rotate the picture in the renderer. Is it possible to disable rotations but leave zoom and pan in the renderer? I tried different modes 0-10, but nothing works for my purposes. Thank you for your ideas!

def get_click_pix(image_file):
    """
    Interactively click on an image to get pixel coords of the clicks
    :param image_file: the image file
    :return: list of pixel coordinates of the clicked points
    """

    img = Image(image_file).pad(0).pickable(True)
    px = []  # detected pixel coordinates of the clicks
    plt = Plotter(size=img.shape, axes=1)
    msg = Text2D("", pos='top-center', bg='r9', font="VictorMono")

    def onleftclick(event):
        pt3 = event.picked3d
        px.append([int(pt3[0]), int(pt3[1])])
        plt.add(Point(pt3, r=15, c='red').pickable(False))

        msg.text(f'Pixel {px[-1]} is clicked.')
        plt.remove(msg)
        plt.add(msg)

        printc(f'Click at: {pt3[:2]}')

    plt.add_callback('left click', onleftclick)
    plt.add(img)
    # plt.add(pl)
    plt.show(interactive=True)
    print(px)
    plt.clear().close()

    return px

Usage:
get_click_pix(dataurl+"images/dog.jpg")
and click on the nose. The clicked pixel coordinates are correct even after a 3D rotation, it just does not look nice )

[marcomusy]

Hi you can use or even create new interactors eg.:

from vedo import *
from vedo.interactor_modes import MousePan

def onleftclick(event):
    pt3 = event.picked3d
    printc(f'Click at: {pt3[:2]}')
    px.append([int(pt3[0]), int(pt3[1])])
    plt.add(Point(pt3, r=15, c='red').pickable(False))
    msg.text(f'Pixel {px[-1]} is clicked.')
    plt.remove(msg)
    plt.add(msg)
    plt.render()

px = []  # detected pixel coordinates of the clicks
img = Image(dataurl+"images/embryo.jpg").pickable(True)
msg = Text2D(pos='top-center', bg='r9', alpha=1, font="VictorMono")

mode = MousePan()

plt = Plotter(size=img.shape, axes=0)
plt.add_callback('left click', onleftclick)
plt.show(img, mode=mode, zoom="tight")
plt.close()
print(px)

[baba-yaga]

hank you, Marco! Exactly what I needed. You have already programmed solutions to all possible questions )