felixlechA.script

HUD_Camera_Speed - tool - felixlecha
import maya.cmds as mc
from functools import partial
from math import sqrt

def show_speed( cam_obj, *args ):
    '''
    Calculate and return camera speed
    '''
    if not cam_obj:
        cam_obj= 'persp'

    # - Get current time
    i_time = mc.currentTime( q=True )
    
    # - Get Camera position
    pos_current= mc.getAttr( cam_obj +'.translate')[0] # at current frame
    pos_previous= mc.getAttr( cam_obj +'.translate', time= i_time-1)[0] # at previous frame
    
    # - Calculate distance
    delta= (pos_current[0] - pos_previous[0]) + (pos_current[1] - pos_previous[1]) + (pos_current[2] - pos_previous[2])
    
    # - Convert to km/h
    delta= sqrt( delta **2 )* 86400 / 1000
    
    return str(int(round( delta ))) + ' km/h'

# - Create HUD
sel= mc.ls( sl= True )

if sel:
    cam_select= sel[0]
else:
    cam_select= None

mc.headsUpDisplay( 'HUD_Camera_speed', section= 7, block=0, blockSize='medium', label= '', labelFontSize= 'large', command= partial( show_speed, cam_select ), event= 'timeChanged' )

# - Remove HUD
mc.headsUpDisplay( 'HUD_Camera_speed', rem=True )
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