|
Adding the append of the frame in get_geometry_hash for my ReadGeo
node still isn't triggering a call to geometry_engine in my
GeoReader node. I've also tried adding a dummy parameter in the
ReadGeo node and animating it on frames where my geometry is updated
but that doesn't work either. I have another example that does update but it's implemented as a SourceGeo node. Do developers usually implement readers as SourceGeo nodes instead of GeoReader? One thing that does seem to work is creating the node and hitting the "reload" button in the file knob. After that the file reads on every frame (but won't batch render). Anyone know how what functions the reload button triggers? Thanks, Eric > Ah, then Xiaolong's suggestion is correct if there's no way to tell if there's a geometry change between frames with your API. > Otherwise for best performance only change the hash if you know there's a geometry change, and try to target the correct hash for the particular change. For example if only point positions are changing between frames only affect the Group_Points hash, then during create_geometry() test the rebuild flag for what parts of the geometry you should rebuild. > Cheers, > -jonathan
On Apr 8, 2011, at 5:20 PM, Eric Larsen wrote:
> There is one file containing all the time samples so I need to be able to at least query our API to see if the geometry has changed on each frame.
>> Is this because the file is dynamically changing its contents without changing its file name?
>>
>> Forcing it to re-read on a frame change is a pretty wasteful way to do it - include the modification time of the file in the hash instead:
>>
>> struct stat st;
>> if (stat(filename(), &st)==0)
>> geo_hash[Group_Primitives].append(&st.st_mtime, sizeof(time_t));
>>
>>
>>
>>
>> On Apr 8, 2011, at 5:41 AM, Xiaolong Qian wrote:
>>
>> > hi,
>> >
>> > Try to override this function:
>> >
>> > void get_geometry_hash(){
>> > ReadGeo::get_geometry_hash();
>> > geo_hash[Group_Object].append(outputContext().frame());
>> > }
>> >
>> > 2011/4/7 Eric Larsen <Eric.Larsen at disneyanimation.com>
>> > Is there a way to force ReadGeo to update reading frames for a single file (no single file per frame)? I wrote a custom GeoReader node that is working but not updating. I creating a derived class from ReadGeo overriding the append function as suggested in a previous post and also tried animating parameters in the ReadGeo node. Is there another way to force ReadGeo to execute the GeoReader geometry_engine call?
>> >
>> > Thanks,
>> >
>> > Eric
>> >
>> >
>> >
>> > void append(Hash& hash)
>> > {
>> > hash.append(outputContext().frame());
>> > }
>> >
>> > _______________________________________________
|
_______________________________________________ Nuke-dev mailing list [email protected] http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-dev
