On 02/04/13 16:23, Stefan Eilemann wrote:
On 2. Apr 2013, at 17:17, Carlos Duelo <[email protected]> wrote:
What is your exact problem?
I want a simple application which fill each tile with a different colour.
The tile equalizer decomposes the rendering of a single view into evenly-sized
tiles. While this may be abused for your needs, you could simply write a loop
decomposing the PixelViewport in even tiles in Channel::frameDraw.
Yes, I thought that I could do it as you mention but in the future using
the tile_equalizer decomposition will give me many facilities, so I
would like use it.
Now, I have a application which render isosurfaces and I need to use
more than one node so, equalizer seems my solution. My application
return the pixels for a given tile and camera.
So, my idea is take the tile in Channel::frameDraw using getViewport and
use glDrawPixels to write the pixels that I have rendered for this tile.
Something like this:
viwport = getViewPort
tilePixels = renderTile(viewPort, Camera)
glDrawPixels(viewport.w, viewport.h, GL_RGB, GL_FLOAT, tilePixels)
For this reason, I started developing a simple application, to
understand how it works.
My problem is that I do not know how to achive this "Each tile is read back
correctly and assembled in the right place on the destination channel."
This is what Equalizer does. Did you run the example I mentioned?
Yes, I run the example and works with eqPly but not for me.
Do I need two channels, one to fill the tiles and another to use as destination
channel?
One channel, used as source and dest does work. See the attached diff for what
you have in mind.
HTH,
Stefan.
diff --git examples/configs/4-window.all.eqc examples/configs/4-window.all.eqc
index b578cd3..d16fd3c 100644
--- examples/configs/4-window.all.eqc
+++ examples/configs/4-window.all.eqc
@@ -78,7 +78,7 @@ server
name "2D"
view
{
- observer 0
+ observer 0
viewport [ 0 .5 .5 .5 ]
wall
{
@@ -708,12 +708,6 @@ server
tile_equalizer {}
compound {}
- compound { channel "channel2" outputframe {} }
- compound { channel "channel3" outputframe {} }
- compound { channel "channel4" outputframe {} }
- inputframe { name "frame.channel2" }
- inputframe { name "frame.channel3" }
- inputframe { name "frame.channel4" }
}
compound
@@ -721,7 +715,7 @@ server
channel ( segment 0 layout "DB_DirectSend" view 0 )
buffer [ COLOR DEPTH ]
-
+
compound
{
range [ 0.00 0.25 ]
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