Works for me. Thank you.
----- Original Message -----
From: "Robert Osfield" <[EMAIL PROTECTED]>
To: "osg users" <[email protected]>
Sent: Friday, April 06, 2007 2:47 PM
Subject: Re: [osg-users] Tangent Space Generator
Hi,
Looking at the code (I'm not the author of this bit so I'm in the same
boat as you) it looks like the original code is 2, i+1, i+2 is wrong,
and then using 0, i+1, i+2 would be more appropriate so I've made this
change and checked it in to SVN.
Let me know if it works fine for you.
Robert.
On 4/6/07, D. C. Fennell <[EMAIL PROTECTED]> wrote:
I was using the TangentSpaceGenerator for GL_TRIANGLE_FAN. In the
"generate"
function for TRIANGLE_FAN, if the primitive set is not
DrawArrayLengthsPrimitiveType, it goes to compute with the following
code:
for (i=0; i< N-2; ++i){
compute(pset, vx, nx, tx, 2, i+1, i+2)
}
this code gives indices of
2, 1, 2 <------
2, 2, 3 <------
2, 3, 4
2, 4, 5
etc...
This gives me incorrect results. From what I understand about tangent
space,
you need to calculate it from a plane. Two instances here give a line
(marked above)
Changing the function to "compute(pset, vx, nx, 0, i+1, i+2)" gives me
the
correct results.
Thanks in advance for any input.
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