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RtLtMapLightingSession Struct Reference
[RtLtMap]
Collaboration diagram for RtLtMapLightingSession:
Detailed Description
The RtLtMapLightingSession structure holds information to be passed
to RtLtMapIlluminate. It is used to
parameterize the lighting process.
The RtLtMapLightingSession structure encapsulates a set of
objects and keeps track of the proportion of samples, within that
set, that have already been lit by calls to RtLtMapIlluminate. Each call performs
lighting for one 'slice' of the whole 'session'. If the camera
member is non-NULL, it is important that the camera is not moved
between lighting slices.
The RtLtMapLightingSession is also passed to RtLtMapLightMapsCreate, RtLtMapLightMapsClear, RtLtMapLightMapsDestroy and
RtLtMapAreaLightGroupCreate, though
not all of the session structure's member will be used in each of
these cases.
- See also:
- RtLtMapIlluminate , RtLtMapLightMapsCreate ,
RtLtMapLightMapsClear , RtLtMapLightMapsDestroy ,
RtLtMapAreaLightGroupCreate
Field Documentation
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An optional array of RpAtomic pointers, specifying which
atomics to light. If this is NULL then all atomics in the world (or
those inside the optional camera's frustum) will be lit.
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An optional pointer to a camera. The camera's frustum may be
used to cull objects and/or triangles from the set of those to be
processed.
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The length of the atomicList array. If this is set to '-1' then
none of the atomics in the world will be lit.
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This specifies how many lightmap samples should be lit. If it is
left zero then all samples in the current set of objects will be
lit. Note that partial lighting is quantized to be per-polygon (for
lightmapped objects). numSamples will always be rounded up, not
down.
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The length of the sectorList array. If this is set to '-1' then
none of the sectors in the world will be lit.
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| rpLtMapSampleMap* sampleMap |
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An optional array of RpWorldSector pointers, specifying
which sectors in the world to light. If this is NULL, then all
sectors in the world (or those inside the optional camera's
frustum) will be lit.
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Lighting for the current 'slice' should begin with this sample.
It is the user's responsibility to increment this value after each
slice. Note that partial lighting is quantized to be per-polygon
(for lightmapped objects). startSample will always be rounded down,
not up.
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This specifies the supersampling value for this current lighting
session.
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This specifies how many lightmap samples will be lit in total
for the world specified (this is filled in by RtLtMapIlluminate, not the calling
function).
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This world is that in which collisions are performed during
illumination (for the purposes of lighting visibility
determination)
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