[Radiance-general] Rotating image to mach a rotated polygon

[Greg Ward]

Hi Per,

Looks like no one got back to you on this.  Perhaps your question isn't completely clear, because I'm not sure of the answer, either.

Your fc_fp2.cal file seems to be tailored for a particular arrangement of objects.  In general, you can add a transform to your colorpict string arguments to account for simple surface movements.  Did you try:

void colorpict fc_val_fp2
9 red green blue images/vwrays_illum_fp2_falsecolor.hdr fc_fp2.cal fc_u fc_v -rz 7.3
0
0

If that doesn't do the right thing, you can try "-rz -7.3" instead.  Alternatively, you can eliminate fc_fp2.cal entirely with:

void colorpict fc_val_fp2
15 red green blue images/vwrays_illum_fp2_falsecolor.hdr . Px Py -s 20.1 -t -167 -248 0 -rz 7.3
0
0

Again, I am guessing a bit here as your situation isn't entirely clear to me.

Best,
-Greg

> From: Per Haugaard <perhaugaard at yahoo.dk>
> Date: April 5, 2013 3:00:28 AM PDT
> 
> Dear users,
> 
> A quick question. How do I rotate the falsocolor image vwrays_illum_fp2_falsecolor.hdr to match the floor plane? 
> I need to rotate it around the z-axiz 7.3 dg before it is transformed to the u v coordination system
> 
> Below is the input for the working plane image:
> 
> void colorpict fc_val_fp2
> 7 red green blue images/vwrays_illum_fp2_falsecolor.hdr fc_fp2.cal fc_u fc_v
> 0
> 0
> 
> fc_val_fp2 glow fc_glow_fp2
> 0
> 0
> 4 10 10 10 0
> 
> void mixpict mp_fp2
> 7 fc_glow_fp2 void nonzero images/vwrays_illum_fp2_falsecolor.hdr fc_fp2.cal fc_u fc_v
> 0
> 0
> 
> mp_fp2 polygon office.fp2
> 0
> 0
> 12
>     -112  -220  40
>     -169  -228  40
>     -167  -248  40
>     -110  -240  40
> 
> And here are the transformation fc_fp2.cal file:
> 
> 
> nonzero(r,g,b) = if(max(r,max(g,b))-0.1, 1, 0);
> 
> fc_u = ((Px+167))/20.1;
> fc_v = ((Py+248))/20.1;
> 
> 
> Cheers,
> 
> Per
> 
> 
> 
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