Xaiv qhov bitangent, peb coj cov khoom hla ntawm qhov qub thiab tangent vectors ces muab nws los ntawm qhov tas li hauv tangent. w uas yog lub handedness ntawm qhov chaw tangent. Cov ntsiab lus bitangent raws V kev ntxhib los mos ua haujlwm axis ntawm lub ntsej muag.
Dab tsi yog kab bitangent?
A bitangent yog ib kab uas tangent mus rau nkhaus ntawm ob lub ntsiab lus sib txawv. Aa dav dav dav hlau quartic nkhaus muaj 28 bitangents nyob rau hauv lub complex projective dav hlau. Txawm li cas los xij, raws li qhia los ntawm Plücker (1839), tus naj npawb ntawm cov bitangents tiag tiag ntawm quartic yuav tsum yog 28, 16, lossis tus lej tsawg dua 9.
Yuav ua li cas yog ib tug bitangent vector?
Lub bitangent vector txhais tau tias yog chav vector pw hauv lub dav hlau tangent uas yog qhov zoo. Cov vectors thiab tsis tas yuav yog orthogonal thiab tej zaum yuav tsis muaj nyob rau kev ua haujlwm tsis zoo thiab. Lub vector muab los ntawm. yog chav tsev ib txwm rau saum npoo ntawm qhov taw tes.
Koj suav daim ntawv qhia li cas?
Daim ntawv qhia ib txwm muaj txhais nyob rau hauv tangent space, yog li ib txoj hauv kev los daws qhov teeb meem yog xam cov matrix los hloov qhov qub ntawm qhov chaw tangent mus rau qhov chaw sib txawv xws li lawv. rov ua raws li qhov kev taw qhia ib txwm muaj: cov vectors ib txwm yog tom qab ntawd txhua qhov taw qhia roughly nyob rau hauv qhov zoo y kev taw qhia.
Dab tsi yog ib qho ntxoov ntxoo?
Daim phiaj xwm ib txwm tso cai koj ntxiv cov ntsiab lus saum npoo yam tsis tau ntxivib qho duab geometry. Qhov kev ntxhib los mos no yog daim ntawv qhia ib txwm muaj. … Tom qab ntawd hauv lubfragment shader, koj hloov qhov qis poly mesh's vertex normals nrog lub siab poly mesh's normals koj ci rau hauv daim ntawv qhia ib txwm.
