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-   -   Mainview can't go back to original point (https://forum.worldviz.com/showthread.php?t=4596)

jacky 05-20-2013 11:27 AM

Mainview can't go back to original point
 
Hi all,

I created two boxes. One box connected to the sensor with 3DOF orientation and the other one connected to the Mainview. I linked the two boxes with function viz.grab(). The mouse's buttons were used to make mainview forward or backward along the direction of mainview. The space key was used to make the boxes back to the original point with positions (0,0,0) and euler (0,0,0). But it did not work. I didn't the reason. If someone know, please tell me. Thanks very much.

Code:

"""
key commands:
        r                                                - reset the position and orientation of mainview,
                                                          place the mainview at the original point
        mouse's left button            - move the mainview forward
        mouse's right button        - move the mainview backward
        up array                                - move the mainview forward
        down array                            - move the mainview backward
        4                                                - move the mainview forward
        1                                                - move the mainview backward
        5                                                - move the mainview up along the +Y axis( increase eyeheight)
        2                                                - move the mainview down along the -Y axis(decrease eyeheight)

"""

import viz
import vizact
import math
import vizinput

viz.setMultiSample(4)
eyeheight=1.65
viz.eyeheight(eyeheight)

#sensor_place=['Sensor facing FORWARD','Sensor facing LEFT']
#place=vizinput.choose('Select Sensor Config',sensor_place)

display_mode=['2D_Fullscreen','Sony Hmz-T1']
i = vizinput.choose('Select Display Mode', display_mode )
if i==0:
        viz.go()
else:
        viz.go(viz.FULLSCREEN)
        import sony
        hmd=sony.HMZT1()


#load the 3 space sensor information
import threespace_api as ts_api
device_list, unknown_list = ts_api.getAvailableComPorts()
for device_port in device_list:
        com_port, friendly_name, device_type=device_port
        if device_type=="USB":
                device=ts_api.TSSensor(com_port=com_port)
        elif device_type=='DNG':
                device=ts_api.TSDongle(com_port=com_port)
                #device=dng_device[0]
        elif device_type=='WL':
                device=ts_api.TSWLSensor(com_port=com_port)

#load the environment model
environment=viz.addChild('gallery.osgb')

#make mouse invisible and activate mainview's collision
viz.mouse.setVisible(viz.OFF)
viz.mouse.setOverride()
viz.MainView.collision(viz.ON)
viz.MainView.collisionBuffer(0.5)
#viz.MainView.gravity(0)
       
box_scale=0.0001
box_pos=[0,eyeheight,0] #box1 and box2 must be in the same position

box2_sensor=viz.addChild('crate.osgb') #link box2 to 3 space sensor
box2_sensor.setPosition(box_pos)
box2_sensor.setScale([box_scale]*3)

box1_view=viz.addChild('crate.osgb')
box1_view.setPosition(box_pos)
box1_view.setScale([box_scale]*3)

#link mainview to box1 in Vizard
link2=viz.link(box1_view,viz.MainView)

#link box1 to box2
link=viz.grab( box2_sensor, box1_view )

#reset the mainview to the original position
def reset_mainview():
    global link,link2
    link2.remove()
    link.remove()
    link=None
    link2=None
    pos=environment.getPosition()
    pos[1]=pos[1]+eyeheight
    euler=environment.getEuler()
    box1_view.setPosition(pos)
    box1_view.setEuler(euler)
    box2_sensor.setPosition(pos)
    #viz.MainView.setPosition(0,0,0)
    #viz.MainView.setEuler(0,0,0)
    link2=viz.link(box1_view,viz.MainView,srcFlag=viz.ABS_GLOBAL)
    link=viz.grab(box2_sensor,box1_view)


vizact.onkeydown(' ',reset_mainview)

degree=180/math.pi
#link the rotation of mainview to the 3 space sensor.
#def connect_USB_Forward():
#        sensor_euler=device.getFiltTaredOrientEuler() #[pitch,yaw,roll] in radians
#        yaw=sensor_euler[1]*degree
#        pitch=sensor_euler[0]*degree
#        roll=sensor_euler[2]*degree
#        box2_sensor.setEuler(yaw,-pitch,-roll)

#link the rotation of mainview to the 3 space sensor every frame
def connect():
        sensor_euler=device.getFiltTaredOrientEuler() #[pitch,yaw,roll] in radians
        yaw=sensor_euler[1]*degree
        pitch=sensor_euler[0]*degree
        roll=sensor_euler[2]*degree
        box2_sensor.setEuler(yaw,pitch,roll)


vizact.ontimer(0,connect)

#move the mainview along the view direction
param=0.02 # the step of increase or decrease distance

def move_forward():
        pos=viz.MainView.getPosition()
        yaw=viz.MainView.getEuler()[0]*(math.pi)/180
        #pos=box1_view.getPosition()
        #yaw=box1_view.getEuler()[0]*(math.pi)/180
        cos=math.cos(yaw)
        sin=math.sin(yaw)
        pos[2]=pos[2]+param*cos
        pos[0]=pos[0]+param*sin
        viz.MainView.setPosition(pos)

def move_backward():
        pos=viz.MainView.getPosition()
        yaw=viz.MainView.getEuler()[0]*(math.pi)/180
        cos=math.cos(yaw)
        sin=math.sin(yaw)
        pos[2]=pos[2]-param*cos
        pos[0]=pos[0]-param*sin
        viz.MainView.setPosition(pos)
       
#move the mainview along y axis

vizact.whilemousedown(viz.MOUSEBUTTON_LEFT,move_forward)
vizact.whilemousedown(viz.MOUSEBUTTON_RIGHT,move_backward)

vizact.onkeydown(viz.KEY_UP,move_forward)
vizact.onkeydown(viz.KEY_DOWN,move_backward)
vizact.onkeydown('4',move_forward)
vizact.onkeydown('1',move_backward)

If I changed the function move_forward() like below, It also didn't work and the mouse's button can't work either.

Code:

def move_forward():
        pos=box1_view.getPosition()
        yaw=box1_view.getEuler()[0]*(math.pi)/180
        cos=math.cos(yaw)
        sin=math.sin(yaw)
        pos[2]=pos[2]+param*cos
        pos[0]=pos[0]+param*sin
        box1_view.setPosition(pos)
        box2_sensor.setPosition(pos)


Frank Verberne 06-04-2013 04:22 AM

As far as I can see, you commented out the two most important lines of reset_mainview(), namely:
#viz.MainView.setPosition(0,0,0)
#viz.MainView.setEuler(0,0,0)
Have you tried deleting the comments signs (#)?


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