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PC,ｽﾏﾎ,PHSは ULA べっかんこ 公式(ｽﾏﾎ) 公式(PC) で書き込んでください｡

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引用切替：ﾚｽｱﾝｶｰのみ
>>456 > >>455 > What I meant is that a "orthonormal" 3x3 matrix represents pure rotation. > If a 3x3 matrix contains scaling or shearing, that matrix is NOT orthonormal. > In this case, you must calculate the inverse of the transpose of the 3x3 matrix, > instead of just using the original matrix, in order to transform "normal" vectors. > > However, you said in your previous post (I assume 437 = 455) that you wanted to > transform "direction" vectors. Unlike normals, direction vectors can be transformed > simply by using the upper-left 3x3 submatrix of the original 4x4 transform matrix. > I'm very sorry to have mixed up "direction" with "normal."
ﾛｰｶﾙﾙｰﾙ SETTING.TXT

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