Create object without base

Lancer · 02-15-2020 05:11 PM

Hello,

is it possible to create an object without the base?

Example:

Code:

Object op;

op.base(EE::UIDZero);

op.type(true, ObjType.getID("OBJ_AVATAR"));

op.align(true, ALIGN_NONE, ALIGN_NONE, ALIGN_NONE);

Game::World.objCreateNear(op, Matrix(1.f, EE::Vec(0,0,0)));

RedcrowProd · 02-15-2020 05:28 PM

i'm pretty sure you can create an obj with an empty base, but not with no base smile

for that just create an obj and leave it empty

Lancer · 02-17-2020 06:07 PM

Hello,

it seems to work fine with op.base(EE::UIDZero);
I'm able to spawn my character.

I just have 1 question and 1 issue (probably can be solved together).

Question:
How can I rotate my character?

Issue:
Whenever I call this

Code:

m_skel.updateBegin(); // begin update

        m_skel.clear();       // clear skeleton animation

        m_skel.animate(m_uidAnimation, Time.time()); // animate animation and current time position

        m_skel.updateMatrix(); // update skeleton animation matrixes

        m_skel.updateEnd(); // end update

then the character is no longer visible (I guess his pos changes)

Update:
I fixed the issue by changing

Code:

m_skel.updateMatrix(); // update skeleton animation matrixes

to this

Code:

m_skel.updateMatrix(Matrix()); // update skeleton animation matrixes

Is this good or bad?

Also any idea how to rotate the character? I tried

Code:

Matrix m = T.matrix();

m.orn().rotateY(60);

m.setPos(pos());

m_skel.updateMatrix(m);

but this doesn't change anything

I noticed the following:
if I call it like this

Code:

m.orn().rotateY(60);

m.setPos(pos());

m_skel.updateMatrix(m);

then rotateY does not work.

but if I call it like this,

Code:

m.setPos(pos());

m.orn().rotateY(60);

m_skel.updateMatrix(m);

then it works..

However, my solution now is:

Code:

Matrix m = T.matrix();

OrientP orn(m.pos, m.z, m.y); // convert matrix to positioned orientation

orn.rotateY(DegToRad(270));

orn.fix(); // normalize and realign

T.matrix(Matrix(orn)); // set matrix from positioned orientation

Harry · 02-17-2020 08:16 PM

Hi Lancer,

Regarding updateMatrix() - yes it is correct. When you provide no argument then the default identity matrix is used, which is a (0,0,0) position without rotation.

To correctly create matrix you have to remember about two concepts EE is using:
- set(Pos/Rotate/Scale) functions reset matrix to identity one and then performs transformation
- move/scale/rotate functions does not reset matrix and apply transformations on top of existing ones.

Remember that order of transformations does matter. Rotating and moving matrix will give different results than moving and then rotating.

For your purposes you can try something like this:

Code:

Matrix m = Matrix().setPos(pos()).rotateY(DegToRad(60));

m_skel.updateBegin().clear().animate(m_uidAnimation, Time.time()).updateMatrix(m).updateEnd();

Lancer · 02-17-2020 10:58 PM

Thank you

Create object without base
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