Peter Nyboer

Using the jit.gl.sketch-based (js at the bottom) and this patch to generate some graphics, the jittermatrix output from the texture readback in jit.gl.render flips about the x-axis on everyother bang to jit.gl.texture. I have an undesireable workaround in the patch, too.

/*------BEGIN testout.js----------------*/

var sk=new JitterObject("jit.gl.sketch",rendername);

var render=new JitterObject("jit.gl.render",rendername);

//totex = new JitterObject("jit.gl.texture",rendername);

//var window = new JitterObject("jit.window",rendername);

    if(hlite01[0]>=0 && hlite01[1]>=0) {

            sk.moveto(-aspect-(griddivx)+(2*hlite01[0]*griddivx),1+(griddivy)-(2*hlite01[1]*griddivy),0);

            sk.glcolor(.7,0,0);

            sk.plane(griddivx+(aspect*0.015),griddivy+0.015);

            sk.glcolor(0,0,0);

            sk.plane(griddivx-(aspect*0.01),griddivy-0.01);

    var l = arrayfromargs(messagename,arguments);

    var gx = Math.floor(x/(wsize[0]/grid[0]));

    var gy = Math.floor(y/(wsize[1]/grid[1]));

Using the jit.gl.sketch-based (js at the bottom) and this patch to generate some graphics, the jittermatrix output from the texture readback in jit.gl.render flips about the x-axis on everyother bang to jit.gl.texture.  I have an undesireable workaround in the patch, too.
On my macbookpro w/ x1600 256 card.

/*------BEGIN testout.js----------------*/
autowatch =1;
inlets=2;
outlets=2;
setoutletassist(0,"size");
setoutletassist(1,"bang for matrix");
var v=new Array();
var rendername="clips";
var sk=new JitterObject("jit.gl.sketch",rendername);
sk.camera=[0,0,1];
var render=new JitterObject("jit.gl.render",rendername);
render.ortho=2;
render.fsaa=1;
//totex = new JitterObject("jit.gl.texture",rendername);
//totex.name = "clipmatrix";
//var window = new JitterObject("jit.window",rendername);
var wsize = [400,300];
var aspect = wsize[0]/wsize[1];
sk.reset();
var grid = [6,6];
var griddivx = aspect/grid[0];
var griddivy = 1/grid[1];
var gx01 = -1;
var gy01 = -1;
var hlite01 = [-1,-1];

strange-flipping-about-xaxis-on-texture-readback-bug

hm...seem to have figured something out...

I made the jit.matrix that connects to slab the same dim as the texture and renderwindow. this stopped the flipping. I then found i was a frame behind on what I saw in the bitmap version vs. the rendered version, no matter what order I had this stuff in:

this was solved by repeating the line "render.to_texture();" twice:

now it's in sync. I don't understand why I would need to do that, but it does work the way I would expect.

hm...seem to have figured something out...
I made the jit.matrix that connects to slab the same dim as the texture and renderwindow.  this stopped the flipping.  I then found i was a frame behind on what I saw in the bitmap version vs. the rendered version, no matter what order I had this stuff in:
	render.erase();
	render.drawswap();
	render.usetexture("clipbank");
	render.to_texture();
	outlet(1,"bang"); 
this was solved by repeating the line "render.to_texture();" twice:
	render.erase();
	render.drawswap();
	render.usetexture("clipbank");
	render.to_texture();
	render.to_texture();
	outlet(1,"bang"); 
now it's in sync.  I don't understand why I would need to do that, but it does work the way I would expect.

strange flipping about xaxis on texture readback - bug?