Determination of the angle of rotation matrices

Babulesnik · 01-04-2012 08:50 PM

I need to transfer over the network angles on the axes x, y, z.

If I turn the matrix along the x axis and check the result

Code:

ItemsBowling[4].matrix(ItemsBowling[4].matrix().setRotateX(PI_4));

...

D.text(0,0,S+ItemsBowling.absElm(4).matrix().angles().x);

The result is correct = 0.785

But if you increment the degree

Code:

ItemsBowling[4].matrix(ItemsBowling[4].matrix().setRotateX(PI));

I get a strange result = -0.000

How to find the angles of rotation matrix ?

Babulesnik · 01-06-2012 07:40 PM

If I use the

Code:

ItemsBowling.absElm(4).matrix().axisAngle(ItemsBowling.absElm(4).matrix().orn().​x)

result to 180 degrees the angle is correct, if the angle is greater than 180 degrees countdown(

for example:
ItemsBowling[4].matrix(ItemsBowling[4].matrix().setRotateX(PI));
result = 3.142 - good !

ItemsBowling[4].matrix(ItemsBowling[4].matrix().setRotateX(PI+PI_6));
result = 2.618 - badly ((

Driklyn · 01-07-2012 01:21 AM

That's the nature of Matrices. I'm sure the reason for this is somewhere on this page.

You should probably just keep a Flt for storing the angle, so it doesn't countdown and you can go beyond -PI_2 to +PI_2 range.

Quaternions may be another option.

I may try to elaborate further later, but I gotta go right now.

Babulesnik · 01-26-2012 05:37 PM

When I get the angles ItemsBowling [1]

Code:

Vec angles = ItemsBowling[1].matrix().angles();

And turn the ItemsBowling [2] on these corners, I get an incorrect turn

Code:

ItemsBowling[2].matrix(ItemsBowling[2].matrix().rotateXY(angles.x,angles.y).rotateZ(angles.z));

Here is the code for the example

Code:

if(Kb.bp(KB_R))

      {

          static Flt x;

          x+=0.1;

          ItemsBowling[1].matrix(ItemsBowling[1].matrix().setRotateX(x));

          Vec angles = ItemsBowling[1].matrix().angles();

          Vec pos = ItemsBowling[2].pos();

          ItemsBowling[2].matrix(ItemsBowling[2].matrix().rotateXY(angles.x,angles.y).rotateZ(angles.z));

          ItemsBowling[2].pos(pos);

How to rotate an object at the angles x,y,z of another object? I need to pass these values on the network.

Babulesnik · 01-28-2012 12:39 PM

Please,anyone help me solve this problem

Determination of the angle of rotation matrices
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