camera_minimal_2d.py

#!/usr/bin/python
from __future__ import absolute_import, division, print_function, unicode_literals

""" Example showing what can be left out. ESC to quit"""
import demo
import pi3d
import numpy as np
import picamera
import picamera.array
import threading
import time

npa = None # this is the array for the camera to fill
new_pic = False # this is the flag to signal when array refilled

def get_pics():
  # function to run in thread
  global npa, new_pic
  with picamera.PiCamera() as camera:
    camera.resolution = (320, 240)
    with picamera.array.PiRGBArray(camera) as output:
      while True: # loop for ever
        output.truncate(0)
        camera.capture(output, 'rgb')
        if npa is None: # do this once only
          npa = np.zeros(output.array.shape[:2] + (4,), dtype=np.uint8)
          npa[:,:,3] = 255 # fill alpha value
        npa[:,:,0:3] = output.array # copy in rgb bytes
        new_pic = True
        time.sleep(0.05)

t = threading.Thread(target=get_pics) # set up and start capture thread
t.daemon = True
t.start()

while not new_pic: # wait for array to be filled first time
    time.sleep(0.1)

########################################################################
DISPLAY = pi3d.Display.create(x=150, y=150, frames_per_second=30)
shader = pi3d.Shader("uv_flat")
CAMERA = pi3d.Camera(is_3d=False)
tex = pi3d.Texture(npa)
sprite = pi3d.Sprite(w=tex.ix, h=tex.iy, z=5.0)
sprite.set_draw_details(shader, [tex])

mykeys = pi3d.Keyboard()
xloc = 100.0
dx = 6.1
yloc = 100.0
dy = 1.13


while DISPLAY.loop_running():
  if new_pic:
    tex.update_ndarray(npa)
    new_pic = False

  sprite.draw()
  sprite.rotateIncZ(1)
  sprite.position(xloc, yloc, 5.0)
  if xloc > 300.0:
    dx = -2.1
  elif xloc < -300.0:
    dx = 2.1
  if yloc > 300.0:
    dy = -1.13
  elif yloc < -300.0:
    dy = 1.13
  xloc += dx
  yloc += dy

  if mykeys.read() == 27:
    mykeys.close()
    DISPLAY.destroy()
    break