Rendering OpenGL to Multiple Windows


    Jul 05 2006 | 5:47 pm
    Hi Andrew,
    You just have to send the drawto message to your jit.gl.model object as well. But switching the drawing destination for a bunch of objects and a renderer on every frame may get quite slow.
    It might help you to look at the render_node patch I made for dealing with this and some other common Jitter issues. The patch is at http://2uptech.com/archive . It implements a preview window using render-to-texture and slabs.
    best, Randy

    • Jul 05 2006 | 4:41 pm
      update your other gl objects context name. the jit.gl.model also must receive the drawto target message.
      v a d e //
      www.vade.info abstrakt.vade.info
      On Jul 5, 2006, at 12:22 PM, Andrew Walker wrote:
      > Hi, > > I'm trying to get an OpenGL scene (made up from a large number of > jit.gl.model instances) to display on multiple monitors. > Ultimately, I need to send this to a jit.pwindow (for previewing on > the user interface), and a jit.window (for fullscreen output) - > which I understand require two instances of jit.gl.render, but just > getting jit.gl.render to render to anywhere other than the name of > the window passed to it as an initial argument would be a start. > > The patch below demonstrates the problem I'm having. Rendering to > the window 'foo' is no problem, - but if you instruct it to 'drawto > bar' or 'drawto baz', it seems to attempt to render to the windows, > but nothing actually appears in them. > > I've also tried a number of variations on this theme, all with the > same results. Any pointers on where I'm going wrong would be > greatly appreciated! > > Many thanks in advance, > > Andrew Walker > > max v2; > #N vpatcher 31 90 541 417; > #P window setfont "Sans Serif" 9.; > #P window linecount 1; > #P comment 174 19 100 196617 Start rendering; > #P window linecount 4; > #P newex 34 226 115 196617 jit.window foo @depthbuffer 1 @rect 614 > 76 934 316 @floating 1; > #P window linecount 1; > #P message 309 119 60 196617 drawto baz; > #P window linecount 4; > #P newex 158 226 110 196617 jit.window bar @depthbuffer 1 @rect 614 > 330 934 570 @floating 1; > #P window linecount 1; > #P message 309 97 60 196617 drawto bar; > #P newex 175 98 105 196617 jit.qball @mode usurp; > #P toggle 175 48 15 0; > #P newex 175 75 55 196617 metro 20; > #P newex 175 122 55 196617 t b b erase; > #P message 31 49 109 196617 read mushrooms.obj; > #P window linecount 4; > #P newex 275 226 121 196617 jit.window baz @depthbuffer 1 @rect 614 > 586 934 826 @floating 1; > #P window linecount 1; > #P newex 175 174 82 196617 jit.gl.render foo; > #P window linecount 4; > #P newex 31 74 105 196617 jit.gl.model foo @smooth_shading 1 > @depth_enable 1 @lighting_enable 1; > #P window linecount 1; > #P comment 31 18 100 196617 Read a file; > #P window linecount 2; > #P comment 378 97 100 196617 << Draw to somewhere else; > #P connect 5 0 2 0; > #P connect 8 0 7 0; > #P connect 7 0 9 0; > #P connect 9 0 6 0; > #P connect 12 0 3 0; > #P connect 10 0 3 0; > #P connect 6 2 3 0; > #P connect 6 0 3 0; > #P pop; > > > > Want to be your own boss? Learn how on Yahoo! Small Business.
    • Jul 05 2006 | 5:02 pm
      On 7/5/06, Andrew Walker wrote: > Hi, > > I'm trying to get an OpenGL scene (made up from a large number of > jit.gl.model instances) to display on multiple monitors. Ultimately, I need > to send this to a jit.pwindow (for previewing on the user interface), and a > jit.window (for fullscreen output) - which I understand require two > instances of jit.gl.render, but just getting jit.gl.render to render to > anywhere other than the name of the window passed to it as an initial > argument would be a start. > > The patch below demonstrates the problem I'm having. Rendering to the window > 'foo' is no problem, - but if you instruct it to 'drawto bar' or 'drawto > baz', it seems to attempt to render to the windows, but nothing actually > appears in them. > > I've also tried a number of variations on this theme, all with the same > results. Any pointers on where I'm going wrong would be greatly appreciated! > > Many thanks in advance, > > Andrew Walker > > max v2; > #N vpatcher 31 90 541 417; > #P window setfont "Sans Serif" 9.; > #P window linecount 1; > #P comment 174 19 100 196617 Start rendering; > #P window linecount 4; > #P newex 34 226 115 196617 jit.window foo @depthbuffer 1 @rect 614 76 934 > 316 @floating 1; > #P window linecount 1; > #P message 309 119 60 196617 drawto baz; > #P window linecount 4; > #P newex 158 226 110 196617 jit.window bar @depthbuffer 1 @rect 614 330 934 > 570 @floating 1; > #P window linecount 1; > #P message 309 97 60 196617 drawto bar; > #P newex 175 98 105 196617 jit.qball @mode usurp; > #P toggle 175 48 15 0; > #P newex 175 75 55 196617 metro 20; > #P newex 175 122 55 196617 t b b erase; > #P message 31 49 109 196617 read mushrooms.obj; > #P window linecount 4; > #P newex 275 226 121 196617 jit.window baz @depthbuffer 1 @rect 614 586 934 > 826 @floating 1; > #P window linecount 1; > #P newex 175 174 82 196617 jit.gl.render foo; > #P window linecount 4; > #P newex 31 74 105 196617 jit.gl.model foo @smooth_shading 1 @depth_enable 1 > @lighting_enable 1; > #P window linecount 1; > #P comment 31 18 100 196617 Read a file; > #P window linecount 2; > #P comment 378 97 100 196617 << Draw to somewhere else; > #P connect 5 0 2 0; > #P connect 8 0 7 0; > #P connect 7 0 9 0; > #P connect 9 0 6 0; > #P connect 12 0 3 0; > #P connect 10 0 3 0; > #P connect 6 2 3 0; > #P connect 6 0 3 0; > #P pop; > > > > > ________________________________ > Want to be your own boss? Learn how on Yahoo! Small Business. > > > > >