Spline CV

Umarnin splinecv yana zana B-spline mai cubic ta sanya control vertices (CVs). Ana jawo curve da aka samu zuwa kowace CV amma ba ta wucewa ta cikinsu ba — sai a vertex na farko da na ƙarshe, inda clamped knots ke kwaɓe curve daidai. Wannan yana ba ka iko na yanayin sifa mai fahimta: ja vertex don tura curve zuwa gare ta ba tare da tilasta ta taɓa kowace tabo ba.

Zana spline ta control vertices

Rubuta splinecv a tashar umarni ko danna maɓallin kayan aiki na Spline CV.
Danna don sanya control vertices — kowace dannawa yana ƙara vertex. Ko rubuta X,Y ka danna Enter don daidaitawa madaidaiciya.
Danna Enter don kammalawa (ana bukatar aƙalla vertices 2).

  CV ●         ● CV
      \       /
       \     /    ← curve an jawo zuwa CVs
        \   /         amma ba ta wucewa ta cikinsu ba
  CV ●   ●   ● CV (farko/ƙarshe: curve tana taɓawa a nan)

Preview mai rai yana sabuntawa yayin da kake motsa mai nuni bayan kowace vertex, yana nuna yadda spline zai kama tare da tabon na gaba a matsayin mai nuni. Danna Escape don kawar da dukkan vertices da aka sanya ka fita.

Shigar da daidaitawa

Maimakon dannawa, rubuta madaidaicin matsayi ga kowace control vertex:

Rubuta ƙimar X.
Danna , — tashar umarni tana nuna [X], [Y{cursor}].
Rubuta ƙimar Y.
Danna Enter don sanya vertex.

Marfe na maɓallan madannai

Maɓalli	Aiki
`0`–`9`, `.`, `-`	Fara shigar da daidaitawar X
`,`	Kulle X ka koma shigar da Y
`Backspace`	Share tsohon harafi na ƙarshe da aka rubuta
`Enter`	Tabbatar da daidaitawar da aka rubuta, ko kammala spline idan babu shigarwa a tsari kuma ≥ vertices 2 sun kasance
`Escape`	Kawar da dukkan vertices ka fita

Gyaran grip — sake tsarawa ta control vertices

Spline na CV da aka zaɓa yana nuna grip ɗaya ga kowace control vertex:

Grip	Matsayi	Aikinsa
Control vertex	A kowace matsayin CV	Ja don motsa wannan CV — curve yana sake tsara kansa zuwa sabon matsayi

Babu grip na “motsa dukkan spline”. Don matsar da dukkan spline, yi amfani da umarnin Move.

Zaɓen CV splines

Hanya	Hali
Danna	Yana zaɓe idan dannawa ta sauka kusa da kowace tabo a kan curve
Ja dama (mai tsauri)	Dukkan tabon dubawa a kan curve dole ne su kasance cikin akwatin zaɓi
Ja hagu (mai haɗuwa)	Kowace sashe na curve da ya taɓa gefen akwatin zaɓi yana zaɓen ta

Umarnin gyara da ake goyon baya

Umarni	Abin da ke faruwa da spline
Move	Yana motsa dukkan control vertices da motsi iri ɗaya
Copy	Yana ƙirƙirar spline iri ɗaya a sabon matsayi
Rotate	Yana juya dukkan CVs a kewayen tabon tushe da aka zaɓa
Mirror	Yana yin madubi na dukkan CVs a kan axis na madubi
Scale	Yana canza girman dukkan CVs iri ɗaya daga tabon tushe
Delete	Yana cire spline

Splines ba su goyon bayan Offset, Trim, ko Extend ba.

Abubuwan

Gaba ɗaya

Abu	Tsoho	Ma’ana
Launi	256 (ByLayer)	Alamar launi ta ACI
Layer	`0`	Sanya layer
Nauʼin layi	ByLayer	Tsarin nauʼin layi mai suna
Girman nauʼin layi	1	Abin da aka canza girman tsarin nauʼin layi
Kauri	0	Kaurin extrusion

Geometry

Abu	Ma’ana
Degree	Digiri na polynomial — koyaushe 3 (cubic)
Control Vertices	Daidaitawar dukkan CVs
Fit Points	Babu-kome ga CV splines; ana cika shi ga fit-point splines kaɗai

Spline CV da Spline Fit — wanne za a yi amfani da shi

	Spline CV	Spline Fit
Curve tana wucewa ta tabo	Na farko da ƙarshe kaɗai (clamped)	Kowace tabo da aka danna daidai
Sarrafa sifa	Jan CVs zuwa yanki	Motsa fit points wanda curve dole ne ya taɓa
Sakamako na gyaran grip	CV yana motsawa → curve an jawo	Fit point yana motsawa → curve an sake lissafa
Mafi kyau don	Curves masu tsafta na hoto, hanyoyi masu kyauta	Curves da dole ne su kai daidaitawa na musamman

DXF — Abin SPLINE (siffar control-vertex)

CV splines ana ajiye su a matsayin abubuwan SPLINE a fayil ɗin DXF, suna ajiye digiri, knot vector, da dukkan daidaitawar control vertex. Dukkan abubuwan — launi, layer, nauʼin layi, girman nauʼin layi, da kauri — suna juyawa ba tare da asara ba. Ana saita splineFlag zuwa 9 (CV spline) don haka sifar ta wanzu a sake loda. Kowace manhajar DXF wanda ke goyon bayan abubuwan SPLINE tare da bayanan CV yana karanta waɗannan daidai.