NOT a "bitangent"...it is a second, orthogonal tangent (of the infinitely many ones). https://en.wikipedia.org/wiki/Bitangent
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Tangents are usually explicitly defined in vertex data though, even though there are infinite mathematical ones
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Agreed, tangent frames in vertex data are standard. "Bitangent" is the wrong word, though.
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"Bitangent" is not the same as the "Bitangent Vector". The latter is correct in this case, no?
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I don't think so. Some game developers started calling it that in the early 2000's by mistake. It is just "T2"
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TangentU/V is probably a sensible choice.
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Yeah, makes sense!
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Not 100% sure but I think somebody made the mistake of calling cotangents "bitagents" back in the day and nobody corrected it
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In computer graphics, it's often incorrectly called "binormal". "Bitangent" is the correct term. Source: http://mathworld.wolfram.com/BinormalVector.html …
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I have to look this up every once and a while and it never sticks!
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The last three aren't as mathematically accurate though :D
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hah, yeah. The definition of "bitangent vector" on Wolfram sounds like computer graphics people covering up their mistake...
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I introduced "bitangent" about 15 years ago to correct the mistaken usage of "binormal" common at the time.
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"Cotangent" refers to a complementary space, which is a two-dimensional entity (bivector) in this case.
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Nice! I did the same in an update of Shader Forge :)
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what decides which way the tangent/bitangent is going?
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Depends! Tangents are supplied with vertex data, usually generated based on UV coordinates. Bitangent = cross( normal, tangent )
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interesting, thank you!
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this link (http://bit.ly/2lVyx5Z ) explains the math of generating based on the UV coords as
@JoachimHolmer mentioned.
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Yes Uh-huh Wait, how do you differentiate betw... Now you're just fucking with me DAMMIT
ধন্যবাদ। আপনার সময়রেখাকে আরো ভালো করে তুলতে টুইটার এটিকে ব্যবহার করবে। পূর্বাবস্থায়পূর্বাবস্থায়
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লোড হতে বেশ কিছুক্ষণ সময় নিচ্ছে।
টুইটার তার ক্ষমতার বাইরে চলে গেছে বা কোনো সাময়িক সমস্যার সম্মুখীন হয়েছে আবার চেষ্টা করুন বা আরও তথ্যের জন্য টুইটারের স্থিতি দেখুন।