[Radiance-general] Affine Transformations in Rcalc?

[Randolph M. Fritz]

Thanks, Greg!

Randolph

On 2011-08-15 15:29:03 -0700, Greg Ward said:

> Small goof:
> 
> 	rcalc -e '$4=$4;$5=$5;$6=$6' \
> 		-e 'th:41.7*PI/180' \
> 		-e 'c11:cos(th);c12:0;c13:sin(th)' \
> 		-e 'c21:0;c22:1;c23:0' \
> 		-e 'c31:-sin(th);c32:0;c33:cos(th)' \
> 		-e '$1=c11*$1+c12*$2+c13*$3' \
> 		-e '$2=c21*$1+c22*$2+c23*$3' \
> 		-e '$3=c31*$1+c32*$2+c33*$3' input.ray | rtrace ...
> 
> Also, I'm not sure if this gives you a clockwise or counter-clockwise 
> rotation.  You may have to experiment a bit.
> 
> -Greg
> 
>> From: "Randolph M. Fritz" <RFritz at lbl.gov>
>> Date: August 15, 2011 2:44:25 PM PDT
>> 
>> I have a series of rays intended for input to rtrace.  I would like to 
>> be able to rotate the starting point and direction of these around the 
>> origin.  Is there any simple way to do this with rcalc ro some other 
>> Radiance tool, or do I have to find another way?
>> 
>> --
>> Randolph


-- 
Randolph