Experimental:Topology POP

Summary

The Topology POP gives finer control on how to combine existing points and topology (vertices and primitives), as well as their memory allocation.

Any unsigned int attribute from the input POP or another POP, interpreted as a list of point indices, can be used to describe the topology of the POP, alongside a manual description of the number of primitives (Topology Info), either using the parameters when the number of primitives of each type are known on the CPU, or using values coming from attributes, when the number of primitives of each type are only known on the GPU. This allows to combine multiple buffers created with GLSL and GLSL Advanced POP to describe geometry for example.

Alternatively the Topology and Topology info can be provided from another POP. Primitives and Vertices attributes can also be merged in from other POPs.

Last but not least, for POPs whose numbers of points and primitives are known on the GPU, the maximum numbers can be updated here, if the user knows them to be smaller, to reduce the memory allocation of downstream POPs. Alternatively if the exact counts are known they can also be entered manually and the POP updated to know that its point count info and topology info are now known on the CPU, without incurring the cost and stall of a download. (Refer to Learning about POPs, Information known on CPU/GPU)

topologyPOP_Class

Parameters - Topology Page

Render render -

Max Points maxpointsmode - ⊞ -

From Input input -

Custom custom -

Max Points maxpoints -

Primitive Source Mode primsourcemode - ⊞ -

Input input -

Specify POP specpop -

Primitive Mode primmode - ⊞ -

Source Topology and Topology Info topo -

Source Attribute and Manual Topology Info attr -

Primitives POP primspop -

Point Index Attrib Class pointindexattrclass - ⊞ -

Point point -

Vertex vertex -

Primitive primitive -

Point Index Attrib Name pointindexattrname -

Vertex Attribute Mode vertattrmode - ⊞ -

None none -

Primitive Source primsource -

Specify POP specpop -

Vertex Attribute POP vertattrpop -

Vertex Attribute Class vertattrclass - ⊞ -

Point point -

Vertex vertex -

Primitive primitive -

Prim Attribute Mode primattrmode - ⊞ -

None none -

Primitive Source primsource -

Specify POP specpop -

Prim Attribute POP primattrpop -

Prim Attribute Class primattrclass - ⊞ -

Point point -

Vertex vertex -

Primitive primitive -

Topology topology - ⊞ -

Source Topology Reference ref -

Source Topology Copy copy -

Max Triangles maxtrianglesmode - ⊞ -

Primitive Source primsource -

Custom custom -

Max Triangles maxtriangles -

Max Quads maxquadsmode - ⊞ -

Primitive Source primsource -

Custom custom -

Max Quads maxquads -

Max Line Strips maxlinestripsmode - ⊞ -

Primitive Source primsource -

Custom custom -

Max Line Strips maxlinestrips -

Max Line Strip Verts maxlsvertsmode - ⊞ -

Primitive Source primsource -

Custom custom -

Max Line Strip Verts maxlsverts -

Max Lines maxlinesmode - ⊞ -

Primitive Source primsource -

Custom custom -

Max Lines maxlines -

Max Point Prims maxpointprimsmode - ⊞ -

Primitive Source primsource -

Custom custom -

Max Point Prims maxpointprims -

Line Strip Info from Prim Source lsinfofromprimsource -

Line Strip Info Update lsinfoupdate - ⊞ -

Auto auto -

Manual manual -

Line Strip Info POP lsinfopop -

Line Strip Info Attribute lsinfoclass - ⊞ -

Point point -

Vertex vertex -

Primitive primitive -

Line Strip Info Attribute lsinfoattr -

Line Strip Index per Vert POP lsindexpop -

Line Strip Index per Vert Attribute lsindexclass - ⊞ -

Point point -

Vertex vertex -

Primitive primitive -

Line Strip Index per Vert Attribute lsindexattr -

Max Verts per Line Strip lsmaxvertsoverride -

Max Verts per Line Strip lsmaxverts -

Point Count and Topology Info pointcounttopoinfo - ⊞ -

From Input input -

From Primitive Source primsource -

From Parameters fromparams -

From Attributes fromattrs -

Point Count pointcountmode - ⊞ -

From Input input -

Set set -

Point Count POP pointcountpop -

Point Count Attribute pointcountclass - ⊞ -

Point point -

Vertex vertex -

Primitive primitive -

Point Count Attribute pointcountattr -

Topology Info POP topoinfopop -

Topology Info Attributes Class topoinfoclass - ⊞ -

Point point -

Vertex vertex -

Primitive primitive -

Triangle Count trianglecountmode - ⊞ -

Primitive Source primsource -

Zero zero -

Set set -

Triangle Count Attribute trianglecountattr -

Quad Count quadcountmode - ⊞ -

Primitive Source primsource -

Zero zero -

Set set -

Quad Count Attribute quadcountattr -

Line Strip Count linestripcountmode - ⊞ -

Primitive Source primsource -

Zero zero -

Set set -

Line Strip Count Attribute linestripcountattr -

Line Strip Vert Count lsvertcountmode - ⊞ -

Primitive Source primsource -

Zero zero -

Set set -

Line Strip Vert Count Attribute lsvertcountattr -

Line Count linecountmode - ⊞ -

Primitive Source primsource -

Zero zero -

Set set -

Line Count Attribute linecountattr -

Point Prim Count pointprimcountmode - ⊞ -

Primitive Source primsource -

Zero zero -

Set set -

Point Prim Count Attrib pointprimcountattr -

Parameters - Common Page

Bypass bypass -

Delete Input Attributes delinputattrs -

Operator Inputs

Input 0: -

Info CHOP Channels

Extra Information for the Topology POP can be accessed via an Info CHOP.

Common POP Info Channels

Common Operator Info Channels

total_cooks - Number of times the operator has cooked since the process started.

cook_time - Duration of the last cook in milliseconds.

cook_frame - Frame number when this operator was last cooked relative to the component timeline.

cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.

cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.

cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.

cooked_this_frame - 1 if operator was cooked this frame.

warnings - Number of warnings in this operator if any.

errors - Number of errors in this operator if any.

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