Garrett

Having problems getting layering to work in jit.gl. I have three sketches I want to layer one in front of the other (each masking the one behind). The middle sketch also has 2d text on it. I can't seem to get all three correctly layering and keep the text drawing correctly. Am I supposed to send each a bang starting from the furthest back or is this not needed?

I know it's a matter of it being the right combination of depth_enable 1 on the objects and depthbuffer 1

on the jit.window (and maybe automatic 1 in there somewhere) but I just can't find the correct combination. Also popping between window and fullscreen seems to always look different so this is proving very difficult to test. Any help much appreciated.

Having problems getting layering to work in jit.gl.  I have three sketches I want to layer one in front of the other (each masking the one behind).  The middle sketch also has 2d text on it.  I can't seem to get all three correctly layering and keep the text drawing correctly.  Am I supposed to send each a bang starting from the furthest back or is this not needed?

I know it's a matter of it being the right combination of depth_enable 1 on the objects and depthbuffer 1
on the jit.window (and maybe automatic 1 in there somewhere) but I just can't find the correct combination.  Also popping between window and fullscreen seems to always look different so this is proving very difficult to test.  Any help much appreciated.

jit-gl-layering

Having a little trouble understanding the final image you're going for, but here are some thoughts:

Try setting the depth_enable 0, and playing around with the layer attribute instead (layer 0, layer 1, etc.).

Look into blend modes (send blend_mode # #) to your sketch objects, and make sure blend_enable is set to 1.

If playing around with those fails you could try looking into jit.gl.slab techniques, although they can be a little tough to get used to at first.

Sorry yes so frustrated with it that I lost the ability to describe/type it correctly but spot on you just solved all of the issues in 20 minutes uhhhh

Thanks very much, completely forgot about the @layer attribute, and I had been at this so long I was beginning to give up. Setting the blue sketch to @layer 0, the text sketch to @layer 1 and the black sketch to @layer 2 works - blue is at the back, text in the middle and black is at the front so you can see through the space. I've reattached the working version.

I am very confused however about the use of the @position x y z attribute on gl objects, the z coordinate when drawing a gl shape i.e. quad -2.5 0.2 0. 2.3 0.2 0. 2.3 -0.15 0. -2.5 -0.15 0., and now the @layer attribute on gl objects. In a situation like this (layering things along the z-axis) when do you use which?

Sorry yes so frustrated with it that I lost the ability to describe/type it correctly but spot on you just solved all of the issues in 20 minutes uhhhh 

Thanks very much, completely forgot about the @layer attribute, and I had been at this so long I was beginning to give up.  Setting the blue sketch to @layer 0, the text sketch to @layer 1 and the black sketch to @layer 2 works - blue is at the back, text in the middle and black is at the front so you can see through the space.  I've reattached the working version.

I am very confused however about the use of the @position x y z attribute on gl objects, the z coordinate when drawing a gl shape i.e. quad -2.5 0.2 0. 2.3 0.2 0. 2.3 -0.15 0. -2.5 -0.15 0., and now the @layer attribute on gl objects.  In a situation like this (layering things along the z-axis) when do you use which?

Yeah, I too am a little confused by the @layer attribute when used in conjunction with z-space. From the OB3D docs though:

@layer: Object layer number (default = 0) When in automatic mode, the layer number determines he rendering order (low to high). Objects in the same layer have no guarantee which will be rendered first."

So it seems like it's less of a conventional "layer" (which makes me think top/bottom) and more of a rendering order (timing).

Yeah, I too am a little confused by the @layer attribute when used in conjunction with z-space.  From the OB3D docs though:

@layer:  Object layer number (default = 0) When in automatic mode, the layer number determines he rendering order (low to high). Objects in the same layer have no guarantee which will be rendered first."

yes rendering order is how I'd read that quote too, where are these OB3D docs you referred too? - I should have a look. Thanks.

yes rendering order is how I'd read that quote too, where are these OB3D docs you referred too? - I should have a look.  Thanks.

OB3D is the generic object that many of jitter's opengl objects extend. This means that while the gridshape has it's own unique attributes/properties, it also has generic properties that it inherits from OB3D. jit.gl.sketch, for example, also extends OB3D.

When you view the reference of an object like jit.gl.gridshape, you'll see a link to the OB3D reference there as well.

OB3D is the generic object that many of jitter's opengl objects extend.  This means that while the gridshape has it's own unique attributes/properties, it also has generic properties that it inherits from OB3D.  jit.gl.sketch, for example, also extends OB3D.

When you view the reference of an object like jit.gl.gridshape, you'll see a link to the OB3D reference there as well.


ah those jitter help pages, yes I know about those. Thanks.

ah those jitter help pages, yes I know about those.  Thanks.

jit.gl layering