beginTransform and endTransform not working correctly? (nyARToolkit)

ivaroh

beginTransform and endTransform not working correctly? (nyARToolkit)

in Contributed Library Questions • 3 years ago

Hi!

I'm using the nyARToolkit's nyARBoard. When calling the beginTransform to set the correct transformation matrix to transform the overlayed graphics, all objects being rendered after a call to the endTransform() method are also transformed.

PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;
nya.beginTransform(pgl);
.... stuff to transform
nya.endTransform();
..objects here are still being transformed until draw() is finished with it's cycle.

Any ideas to why this is happening?

Replies(2)

ivaroh

Re: beginTransform and endTransform not working correctly? (nyARToolkit)

3 years ago

Found the problem. The NyARPsgBaseClass needs to be modified to recover the coordinate system fully and the fix should look something like this.

public void beginTransform(PGraphicsOpenGL i_pgl){
if(this._gl!=null){
this._pa.die("The function beginTransform is already called.", null);
}
this._pgl=i_pgl;
this._pgl.pushMatrix(); //add this to wrap the coordinate system
this._gl=this._pgl.beginGL();
this._gl=i_pgl.gl;
this._gl.glMatrixMode(GL.GL_PROJECTION);
this._pa.pushMatrix();
this._pa.resetMatrix();
this._gl.glLoadMatrixd(this.projection,0);
this._old_matrix=this._pgl.projection;
this._pgl.projection=this._ps_projection;
this._gl.glMatrixMode(GL.GL_MODELVIEW);
this._pa.pushMatrix();
this._pa.resetMatrix();
this._gl.glLoadMatrixd(this.transmat,0);
this._pa.pushMatrix();
return;
}
public void endTransform(){
if(this._gl==null){
this._pa.die("The function beginTransform is never called.", null);
}
this._pgl.projection=this._old_matrix;
this._pa.popMatrix();
this._pa.popMatrix();
this._gl.glMatrixMode(GL.GL_PROJECTION);
this._pa.popMatrix();
this._gl.glMatrixMode(GL.GL_MODELVIEW);
if(this._pgl!=null){
this._pgl.endGL();
}
this._pgl.popMatrix(); //recover the old coordinate system
this._gl=null;
this._pgl=null;
return;
}

andarkmat..

Re: beginTransform and endTransform not working correctly? (nyARToolkit)

11 months ago

Hello,

How I make to modify the NyARPsgBaseClass

Thanks

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