Gauss quadrature on triangle
1 Attachment(s)
Hello?
I want to do Gauss quadrature over triangle as attachted file. I would like to know how to find the points and weights for Gauss quadrature. Thanks. 
Just map the triangle to a rectangle, and apply the 1d Gauss quadrature in a tensor product way!

Here are some quadrature rules
http://people.sc.fsu.edu/~jburkardt/.../dunavant.html Also, check any good book on fem. 

Hi, cfdnewbie.
Thank you for your answer. I know the mapping the triangle to a rectangle. And I can apply the 1d Gauss quadrature. But I don't know how to apply the 1d Gauss quadrature in a tensor product way. Would you tell me the way how to do that, please ? Or, would you recommend any book written that way, please ? 
Hi, praveen. Hi, Jonas Holdeman praveen.
Thankyou for useful information about website. One more question. Would you tell me the transformation mapping from "(1,1),(1,1),(1,1)" to "(0,0), (1,0), (0,1)" ? I would like to know the transformation mapping equation. 
It is a simple scale and shift.
x=(1+q)/2, y=(1+r)/2, for q=+/ 1, r=+/ 1. 
Hi, Jonas Holdeman
Thankyou for your answer. Your answer is big help to me. 
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