Boolean outside camera area?

[kim95616]

I want boolean outside camera area.

How can i do?

[ronit1996]

what do you mean by boolean outside camera area? if you are talking about removing all objects that are outside camera frustum then you have to get the camera frustum by some method (using volume or calculating it via vex or vops) and then use it with your geo in the boolean node.

[konstantin magnus]

Hi Kim,

the volume node can create the camera's frustum, which can be transferred to point attributes for poly-cutting.

frustum_cut.hipnc

[Librarian]

vector _ndc = toNDC("/obj/cam1", @P);

float _ox=ch("ox");
float _oy=ch("oy");
float _oz=ch("oz");

if ((_ndc[0]<0-_ox)||(_ndc[0]>1+_ox)) removepoint(geoself(), @ptnum);
if ((_ndc[1]<0-_oy)||(_ndc[1]>1+_oy)) removepoint(geoself(), @ptnum);
if ((_ndc[2]>0+_oz)) removepoint(geoself(), @ptnum);

 

 

Edited September 15, 2020 by Librarian

[konstantin magnus]

Alternatively transform a box into camera space and boolean intersect it with your geometry.

frustum_cut_boole.hipnc

[underscoreus]

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mfb__geoculler__1_0.hdanc