assembly on gpu instruction question

Started by noatom, Dec 30 2012 05:18 PM

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#1 noatom Members - Reputation: 436

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Posted 30 December 2012 - 05:18 PM

Can someone tell me what the following instruction does?

dp3 r1,t1_bx2,v0_bx2

dp3 means doing a dot point on the xyz values of t1_bx2 and v0_bx2,and the result is saved in r1

What I don't understand is what that _bx2 is for? What does it do the t1 and v0?

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#2 Plerion Members - Reputation: 252

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Posted 30 December 2012 - 06:17 PM

Hello noatom

It performs a scaling:

http://msdn.microsoft.com/de-de/library/windows/desktop/bb219867(v=vs.85).aspx

Greetings

Plerion

Back to DirectX and XNA

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