[WiiFlash] The Wiimote z-Depth?

[alex mitchell]

Hi Jason,

As I understand it, the IR points are actually the positions at which the IR
sensor in the front of the wiimote "sees" the two LEDs. So "one point is
exactly in the middle of the screen" would mean that one of the LEDs is in
the center of the IR sensor's image of the world. So yes, they are the
actual lights.

The Sensor X and Sensor Y refer to the data from the accelerometer inside
the wiimote.

Alex


On 12/19/07 10:22 AM, "Merrill, Jason" <jason.merrill at bankofamerica.com>
wrote:

> OK, but what exactly are the two points? I don't mean to be dense, but I
> thought the IR points were the actual lights inside the sensor bar.  So
> what is the difference between an IR point's x and the sensor x?  If
> it's actual points in the sensor, then can't you just measure that
> distance with a ruler? LOL.  This is confusing. You said, "So if one
> point is exactly in the middle of the screen" - how is a "point"
> (whatever a point is) in the "middle of the screen" (when the screen is
> not part of the detection hardware)?  What then does Sensor X and Sensor
> Y mean?
>  
> 
> 
> Jason Merrill
> Bank of America  
> L&LD GT&O 
> eTools & Multimedia Research & Development
> 
> 
> 
> 
>  
> 
>>> -----Original Message-----
>>> From: wiiflash-bounces at osflash.org
>>> [mailto:wiiflash-bounces at osflash.org] On Behalf Of Patrick
>>> Matte | BLITZ
>>> Sent: Tuesday, December 18, 2007 6:25 PM
>>> To: wiiflash at osflash.org
>>> Subject: Re: [WiiFlash] The Wiimote z-Depth?
>>> 
>>> Well it's just the distance between the 2 points... the
>>> points x and y values are from 0 to 1. So if one point is
>>> exactly in the middle of the screen, it's x is 0.5, and the
>>> other point could be at 0.75. so you have a distance of 0.25
>>> in the x axis. Do the same for the y axis.
>>> 
>>> And the formula to get the distance between two points is
>>> Math.sqrt((x*x)+(y*y)); But the formula is conveniently
>>> available in the point class as a static method.
>>> flash.geom.Point.distance(point1,point2);
>>> 
>>> 
>>> BLITZ | Patrick Matte - 310-551-0200 x214
>>> 
>>> -----Original Message-----
>>> From: wiiflash-bounces at osflash.org
>>> [mailto:wiiflash-bounces at osflash.org] On Behalf Of Merrill, Jason
>>> Sent: Tuesday, December 18, 2007 2:17 PM
>>> To: wiiflash at osflash.org
>>> Subject: Re: [WiiFlash] The Wiimote z-Depth?
>>> 
>>> OK -thanks! So what does:
>>> 
>>> var distance:Number =
>>> flash.geom.Point.distance(wiimote.ir.point1,wiimote.ir.point2);
>>> 
>>> ...really tell you? That's the distance of what?
>>> 
>>> 
>>> Jason Merrill
>>> Bank of America
>>> L&LD GT&O
>>> eTools & Multimedia Research & Development
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>>>> -----Original Message-----
>>>>> From: wiiflash-bounces at osflash.org
>>>>> [mailto:wiiflash-bounces at osflash.org] On Behalf Of Patrick Matte |
>>>>> BLITZ
>>>>> Sent: Tuesday, December 18, 2007 4:53 PM
>>>>> To: wiiflash at osflash.org
>>>>> Subject: Re: [WiiFlash] The Wiimote z-Depth?
>>>>> 
>>>>> I don't think you can figure out the real distance per se.
>>>>> The distance between the two points only gives you a reference.
>>>>> 
>>>>> But what you could do is walk one meter from the ir sensor and save
>>>>> that distance value. Then walk 4 meters from the ir emitter
>>> and save 
>>>>> that value. Then you could extrapolate any value in between
>>> those two.
>>>>> 
>>>>> 
>>>>> BLITZ | Patrick Matte - 310-551-0200 x214
>>>>> 
>>>>> -----Original Message-----
>>>>> From: wiiflash-bounces at osflash.org
>>>>> [mailto:wiiflash-bounces at osflash.org] On Behalf Of Merrill, Jason
>>>>> Sent: Tuesday, December 18, 2007 1:47 PM
>>>>> To: wiiflash at osflash.org
>>>>> Subject: [WiiFlash] The Wiimote z-Depth?
>>>>> 
>>>>> Hey, Fabien's question reminded me of a related question I
>>> had.  How 
>>>>> do you all figure out the z-depth of the Wiimote from the
>>> Sensor bar?  
>>>>> Do you use SensorZ somehow or ir1 and
>>>>> ir2 with some trig functions?  have any sample Actionscript
>>> code for 
>>>>> this?  Thanks.
>>>>> 
>>>>> Jason Merrill
>>>>> Bank of America
>>>>> L&LD GT&O
>>>>> eTools & Multimedia Research & Development
>>>>> 
>>>>> 
>>>>> 
>>>>> _______________________________________________
>>>>> WiiFlash mailing list
>>>>> WiiFlash at osflash.org
>>>>> http://osflash.org/mailman/listinfo/wiiflash_osflash.org
>>>>> 
>>>>> _______________________________________________
>>>>> WiiFlash mailing list
>>>>> WiiFlash at osflash.org
>>>>> http://osflash.org/mailman/listinfo/wiiflash_osflash.org
>>>>> 
>>> 
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> 
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