import numpy as np
from vispy import app, scene
from vispy.visuals import transforms
canvas = scene.SceneCanvas(keys='interactive', show=True)
vb = canvas.central_widget.add_view()
vb.camera = 'turntable'
vb.camera.rect = (-10, -10, 20, 20)
box = scene.visuals.Box(width=1, height=2, depth=3, color=(0, 0, 1, 0.3),
edge_color='green')
vb.add(box)
# Define a scale and translate transformation :
box.transform = transforms.STTransform(translate=(0., 0., 0.),
scale=(1., 1., 1.))
@canvas.events.key_press.connect
def on_key_press(ev):
tr = np.array(box.transform.translate)
sc = np.array(box.transform.scale)
if ev.text in '+':
tr[0] += .1
elif ev.text == '-':
tr[0] -= .1
elif ev.text == '(':
sc[0] += .1
elif ev.text == ')':
sc[0] -= .1
box.transform.translate = tr
box.transform.scale = sc
print('Translate (x, y, z): ', list(tr),
'\nScale (x, y, z): ', list(sc), '\n')
if __name__ == '__main__':
import sys
if sys.flags.interactive != 1:
app.run()
在上面的代码中,如果我添加一个 MatrixTransform,然后旋转立方体然后应用缩放,立方体变成了一个菱形
我想要实现的是在画布中旋转立方体并仅在 X 方向上缩放它,而不会影响其他尺寸