Conference bulova::decw_jan-89_to_nov-90

3003.0. "3D Calculations" by TAV02::MELVYN () Wed Jun 27 1990 15:28

Hi !

We have recently been asked to develop a benchmark which displays polygons
in x,y,z and also performs rotation and scaling. Naturally we chose to
implement the benchmark in PHIGS. 

The problem is due to the very large amount of polygons we have to deal 
with simultaneously the structure traversal in PHIGS take a very long time.

My question is does anybody have a package that if given a polygon in x,y,z
along with a rotation and scale factor, the package returns the actual
projected x,y coordinates which I can then send to a normal X routine,
which I am sure would speed up the benchmark.

I know the formulas exist and good old Foley probably has it in his book 
but due to lack of time I am first checking the wonderful world of
Digital, to see if anybody has something similar.

Any help would be greatly appreciated. 

Cross posted in Decwindows, X, Phigs.

Thanks

mel

    Yes I remember seeing a program which does what you described look in
    the DW_EXAMPLES conference. I forgot the name of the program, it even
    did rotation,scaling,shading etc..
    
    Robert