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carjacker
Joined: 01 Apr 2008
Posts: 3
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 Posted: Tue Apr 01, 2008 11:56 pm Post subject: RotMat in GlovePie, or: Rotating around Global-Axes |
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Hi,
I'm a German student in grade 12 and working on a project about the Wii in connection with the PC.
Maybe my English is not the very best but i hope u'll understand me 
So my problem now is following:
I've got a cube i want to turn in every direction. But I can't use roll, pitch and yaw, because u always see the cube from the front an u can "grab" it with the wiimote an turn in. But if i just change the pitch, yaw and roll the cube rotates around his own axes.
So my idea is not to rotate the cube but move the camera around the cube. But i need alway to focus on the cubes center, that it seems like the cube is rotating.
Anybody who knows how to do that, like use a Rotation Matrix or anything else, and is able to explain it to me  ????
Would be nice!
cheers
carjacker |
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carjacker
Joined: 01 Apr 2008
Posts: 3
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| Posted: Wed Apr 02, 2008 2:24 pm Post subject: |
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No ideas?
Hm...
But maybe s.b. knows how to use cam.WalkLeftDir properly.
I did it like this:
| Code: |
cam.pos += Cam.WalkLeftDir *0.04
cam.pos += Cam.WalkFwdDir *0.04
cam.yaw += 0.03666
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So the camera moves around the cube like in a circle with r=5 meters.
Is it right that Cam.WalkLeftDir moves the Camera left along its own X-Axis and not along the global X-Axis??
I really need ur help! The project is to be finished at the 14th April
Thanks!
carjacker |
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crim3
Joined: 30 Jan 2008
Posts: 26
Location: Spain
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| Posted: Thu Apr 03, 2008 1:08 pm Post subject: |
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Can the cam.WalkFwdDir vector be set? If so, you could make the camera look to the cube setting it to the cube position after the rotation.
Have you already tried RotMat? I've never used it so I don't know how it works. I'd like to test it but I can't run glovepie on this computer. |
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crim3
Joined: 30 Jan 2008
Posts: 26
Location: Spain
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| Posted: Thu Apr 03, 2008 5:42 pm Post subject: |
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I'm at home now and I've tried it. The camera and object coordinates are independent. It's not possible to do the WalkFwdDir thing.
And also... I'm re-reading your post, and I think I don't get it. Moving the camera around the cube looking at the cube is the same that rotate the cube itself.
What inputs do you want to use to control the cube's position/orientation? |
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carjacker
Joined: 01 Apr 2008
Posts: 3
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| Posted: Fri Apr 04, 2008 2:27 pm Post subject: |
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Hi!
Thanks for answers.
I already realized that the "WalkFwd thing" does not work, too.
I'm using the wiimote as input device and want to move the cube by finger tracking.
My code looks like that:
| Code: |
obj1.size= [0.8,0.8,0.8]
Obj1.colour = [100%, 0%, 30%]
var.smooth = 0.00001
//Position dot1
var.x2 = wiimote.dot2X
var.y2 = wiimote.dot2y
if wiimote.dot2vis = false then
var.x1 = Wiimote.dot1x
var.y1 = Wiimote.dot1y
end if
//rotate right
if (wiimote.dot1vis) and (wiimote.dot2vis) and (var.x2 > var.x1+30) then
obj1.yaw = obj.yaw + (sqr(var.x2 - var.x1) *var.smooth)
end if
// rotate left
if (wiimote.dot1vis) and (wiimote.dot2vis) and (var.x2 < var.x1-30) then
obj1.yaw = obj1.yaw - (sqr(var.x2 - var.x1) *var.smooth)
end if
// rotate up
if (wiimote.dot1vis) and (wiimote.dot2vis) and (var.y2 > var.y1+30) then
obj1.pitch = obj1.yaw + (sqr(var.y2 - var.y1) *var.smooth)
end if
//rotate down
if (wiimote.dot1vis) and (wiimote.dot2vis) and (var.x2 < var.x1-30) then
obj1.pitch = obj1.yaw - (sqr(var.y2 - var.y1) *var.smooth)
end if
debug = 'X=' + var.x1 + ' Y=' + var.y1 + ' X2=' + var.x2 + ' Dif=' + (var.x2 - var.x1)
//by Hannes Speicher alias carjacker
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This is now with a rotating cube and not with a moving camera.
I know that moving the camera and let the cube rotate is the same. But obj and cam can be moved and rotated different.
So I try to figger out the best and easiest way. |
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