It sounds like you need to zero out the row ( nuke doesn't do this for you ) prior using it - thus you're memset is heading down the right path you're call is wrong,
memset( buffer +x, 0, (r-x) * sizeof(float)); you have to remember that although the pointer is pointing to [0] that may not be safe if Nuke's only managing x to r. This should hopefully avoid the crash. cheers -- Colin Doncaster Peregrine Labs www.peregrinelabs.com On 2011-05-19, at 12:28 PM, Stephen Newbold wrote: > Hi, > > I'm wondering if you guys can give me some pointers in where I might look to > iron out a glitch in my DrawIop. So everything is generally working as I > want it, but I'm getting very small glitches in the output. Could be in my > code but I'm noticing the glitches change when I use any knob, even those > unconnected with the output which is a bit odd. I've even added a null knob > that does absolutely nothing just to test this. Change this knob and my > artifacts change. > > So, what I'm trying to do first is work out why my output (albeit with > artifacts) is changing when I move unrelated controls. I'm assuming certain > things get updated on any knob change? I know it hard without seeing code, > but have you guys got any ideas what is called/updated each time a knob is > changed? If it helps, things don't change when changing to a different > frame, only when using a knob. Also, the change in artifacts will change > consistently, in other words if I move a slider back and forth, the result > will change consistently back and forth, same artifact pattern for each value. > > I've also tried emptying the output buffer with memset for each row before > filling it again to see if this affected things, but this is crashing nuke, > > memset(buffer, 0, (R - X) * sizeof(float)); > > This has kind of got me stumped. > > Steve > > -- > Stephen Newbold > Compositing Lead - Film > MPC > 127 Wardour Street > Soho, London, W1F 0NL > Main - + 44 (0) 20 7434 3100 > www.moving-picture.com > > _______________________________________________ > Nuke-dev mailing list > Nuke-dev@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-dev
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