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[Manta] Re: Re: Re: Re: Re: RayPacketData::minT


Chronological Thread 
  • From: "James Bigler" < >
  • Cc:
  • Subject: [Manta] Re: Re: Re: Re: Re: RayPacketData::minT
  • Date: Wed, 10 Sep 2008 09:15:06 -0600
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PixelSamplers create samples on the image plane which are then used by
the Camera class to generate rays.

PixelSampler::renderFragment()->Renderer::traceEyeRays()->Camera::makeRays()

James

On Wed, Sep 10, 2008 at 8:36 AM, Li-Ta Lo 
< >
 wrote:
> On Wed, 2008-09-10 at 07:06 -0600, James Bigler wrote:
>> What Abe is mentioning, is that the minT value is based on the length
>> of the direction vector.  When someone requests that the direction
>> vector be normalized, then minT is rescaled to keep it consistent.  In
>> addition this means that minT could have different "units" based on
>> the length of the direction vector.
>>
>> If you want to compare minT with different rays, you should normalize
>> the ray directions with a call to RayPacket::normalizeDirections().
>
> Thanks a lot.
>
> Where is an eye ray generated? In PixelSampler?
>
> Ollie
>
>

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