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show3d_balls.py
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show3d_balls.py
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import numpy as np
import ctypes as ct
import cv2
import sys
showsz=800
mousex,mousey=0.5,0.5
zoom=1.0
changed=True
def onmouse(*args):
global mousex,mousey,changed
y=args[1]
x=args[2]
mousex=x/float(showsz)
mousey=y/float(showsz)
changed=True
cv2.namedWindow('show3d')
cv2.moveWindow('show3d',0,0)
cv2.setMouseCallback('show3d',onmouse)
dll=np.ctypeslib.load_library('render_balls_so','.')
def showpoints(xyz,c_gt=None, c_pred = None ,waittime=0,showrot=False,magnifyBlue=0,freezerot=False,background=(0,0,0),normalizecolor=True,ballradius=10):
global showsz,mousex,mousey,zoom,changed
xyz=xyz-xyz.mean(axis=0)
radius=((xyz**2).sum(axis=-1)**0.5).max()
xyz/=(radius*2.2)/showsz
if c_gt is None:
c0=np.zeros((len(xyz),),dtype='float32')+255
c1=np.zeros((len(xyz),),dtype='float32')+255
c2=np.zeros((len(xyz),),dtype='float32')+255
else:
c0=c_gt[:,0]
c1=c_gt[:,1]
c2=c_gt[:,2]
if normalizecolor:
c0/=(c0.max()+1e-14)/255.0
c1/=(c1.max()+1e-14)/255.0
c2/=(c2.max()+1e-14)/255.0
c0=np.require(c0,'float32','C')
c1=np.require(c1,'float32','C')
c2=np.require(c2,'float32','C')
show=np.zeros((showsz,showsz,3),dtype='uint8')
def render():
rotmat=np.eye(3)
if not freezerot:
xangle=(mousey-0.5)*np.pi*1.2
else:
xangle=0
rotmat=rotmat.dot(np.array([
[1.0,0.0,0.0],
[0.0,np.cos(xangle),-np.sin(xangle)],
[0.0,np.sin(xangle),np.cos(xangle)],
]))
if not freezerot:
yangle=(mousex-0.5)*np.pi*1.2
else:
yangle=0
rotmat=rotmat.dot(np.array([
[np.cos(yangle),0.0,-np.sin(yangle)],
[0.0,1.0,0.0],
[np.sin(yangle),0.0,np.cos(yangle)],
]))
rotmat*=zoom
nxyz=xyz.dot(rotmat)+[showsz/2,showsz/2,0]
ixyz=nxyz.astype('int32')
show[:]=background
dll.render_ball(
ct.c_int(show.shape[0]),
ct.c_int(show.shape[1]),
show.ctypes.data_as(ct.c_void_p),
ct.c_int(ixyz.shape[0]),
ixyz.ctypes.data_as(ct.c_void_p),
c0.ctypes.data_as(ct.c_void_p),
c1.ctypes.data_as(ct.c_void_p),
c2.ctypes.data_as(ct.c_void_p),
ct.c_int(ballradius)
)
if magnifyBlue>0:
show[:,:,0]=np.maximum(show[:,:,0],np.roll(show[:,:,0],1,axis=0))
if magnifyBlue>=2:
show[:,:,0]=np.maximum(show[:,:,0],np.roll(show[:,:,0],-1,axis=0))
show[:,:,0]=np.maximum(show[:,:,0],np.roll(show[:,:,0],1,axis=1))
if magnifyBlue>=2:
show[:,:,0]=np.maximum(show[:,:,0],np.roll(show[:,:,0],-1,axis=1))
if showrot:
cv2.putText(show,'xangle %d'%(int(xangle/np.pi*180)),(30,showsz-30),0,0.5,cv2.cv.CV_RGB(255,0,0))
cv2.putText(show,'yangle %d'%(int(yangle/np.pi*180)),(30,showsz-50),0,0.5,cv2.cv.CV_RGB(255,0,0))
cv2.putText(show,'zoom %d%%'%(int(zoom*100)),(30,showsz-70),0,0.5,cv2.cv.CV_RGB(255,0,0))
changed=True
while True:
if changed:
render()
changed=False
cv2.imshow('show3d',show)
if waittime==0:
cmd=cv2.waitKey(10)%256
else:
cmd=cv2.waitKey(waittime)%256
if cmd==ord('q'):
break
elif cmd==ord('Q'):
sys.exit(0)
if cmd==ord('t') or cmd == ord('p'):
if cmd == ord('t'):
if c_gt is None:
c0=np.zeros((len(xyz),),dtype='float32')+255
c1=np.zeros((len(xyz),),dtype='float32')+255
c2=np.zeros((len(xyz),),dtype='float32')+255
else:
c0=c_gt[:,0]
c1=c_gt[:,1]
c2=c_gt[:,2]
else:
if c_pred is None:
c0=np.zeros((len(xyz),),dtype='float32')+255
c1=np.zeros((len(xyz),),dtype='float32')+255
c2=np.zeros((len(xyz),),dtype='float32')+255
else:
c0=c_pred[:,0]
c1=c_pred[:,1]
c2=c_pred[:,2]
if normalizecolor:
c0/=(c0.max()+1e-14)/255.0
c1/=(c1.max()+1e-14)/255.0
c2/=(c2.max()+1e-14)/255.0
c0=np.require(c0,'float32','C')
c1=np.require(c1,'float32','C')
c2=np.require(c2,'float32','C')
changed = True
if cmd==ord('n'):
zoom*=1.1
changed=True
elif cmd==ord('m'):
zoom/=1.1
changed=True
elif cmd==ord('r'):
zoom=1.0
changed=True
elif cmd==ord('s'):
cv2.imwrite('show3d.png',show)
if waittime!=0:
break
return cmd
if __name__=='__main__':
np.random.seed(100)
showpoints(np.random.randn(2500,3))