[Bf-committers] Re: Ipo keyframe speedup

Campbell Barton cbarton at metavr.com
Fri Aug 4 17:23:20 CEST 2006


BVH is also a motion capture format (industry standard)
now you have me curious about Bounding Volume Hierarchy ;)

erwin at erwincoumans.com wrote:
>
> Just curious, what do you mean by BVH ?
> I assume you don't mean Bounding Volume Hierarchy (which is the common 
> meaning for BVH) ?
> Thanks,
> Erwin
>
> Campbell Barton writes:
>> Hi, I was looking at speeding up BVH import and the bottleneck is 
>> adding keyframes.
>> In further hunting  it seems that calchandles_ipocurve is running on 
>> all curves everytime a keyframe is added, even if the handels arnt 
>> being used. (constant or a linear curves)
>>
>> So I modified Line 450 or ipo.c to only loop over bezier types.
>> void calchandles_ipocurve(IpoCurve *icu)
>> {
>>    BezTriple *bezt, *prev, *next;
>>    int a;
>>    a= icu->totvert;
>>    // was       if(a<2) return;
>>    if(a<2 || icu->ipo==IPO_LIN || icu->ipo==IPO_CONST) return; /* 
>> IPO_CONST or IPO_LIN, no handels */
>>
>> Importing a the BVH 1956 framses long went for 86.2 seconds to 
>> 13.3sec with this change.
>> Since changing this may mess up other areas of Blender, I was 
>> wondering of sombody else could look into this change.
>> - Cam
>> -- 
>> Campbell J Barton
>> 133 Hope Street
>> Geelong West, Victoria 3218 Australia
>> URL:    http://www.metavr.com
>> e-mail: cbarton at metavr.com
>> phone: AU (03) 5229 0241
>> _______________________________________________
>> Bf-committers mailing list
>> Bf-committers at projects.blender.org
>> http://projects.blender.org/mailman/listinfo/bf-committers
>
>
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-- 
Campbell J Barton

133 Hope Street
Geelong West, Victoria 3218 Australia

URL:    http://www.metavr.com
e-mail: cbarton at metavr.com
phone: AU (03) 5229 0241


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