Outline Layer

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< Outline Layer
Revision as of 09:35, 29 March 2012 by Ed62 (Talk | contribs) (Parametri specifici pentru straturile de contur)

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Layer geometry outline icon.png

Despre straturile pentru contur

Straturile pentru contur (Outline Layers) sunt folosite pentru a stoca formele create cu instrumentul pensula sau contururile formelor. Acestea dau un aspect de desen animat. Contururile separate (strokes) sunt folosite pentru a defini cute sau desene 3D si sunt sunt adaugate umbrelor (create folosind trecerea de culoare - gradient sau proprietatea feather), constituind baza pentru o lucrare a unui artist.

Pentru a crea un strat pentru contur (Outline Layer) folositi BLine Tool/ro si bifati Create Outline BLine din caseta Tool Options Panel. Dupa ce ati terminat definirea geometriei conturului si dupa ce ati apasat butonul Execute (sau ati selectat alt instrument sau stare) este creat stratul pentru contur, avand culoarea din prim-plan (foreground).

Parametrii straturilor pentru contur

Parametrii straturilor pentru contur sunt (am lasat denumirile in engleza):

Nume Valoare Tip
Type real icon.png Z Depth 0.000000 real
Type real icon.png Amount 1.000000 real
Type integer icon.png Blend Method Composite integer
Type color icon.png Color
color
Type vector icon.png Origin 0.000000u,0.000000u vector
Type bool icon.png Invert
bool
Type bool icon.png Antialiasing
bool
Type real icon.png Feather 0.000000pt real
Type integer icon.png Type of Feather Fast Gaussian Blur integer
Type integer icon.png Winding Style Non Zero integer
Type list icon.png Vertices List list (BLine)
Type real icon.png Outline Width 2.000000pt real
Type real icon.png Expand 0.000000pt real
Type bool icon.png Sharp Cusps
bool
Type bool icon.png Rounded Begin
bool
Type bool icon.png Rounded End
bool
Type real icon.png Loopyness 1.000000 real
Type bool icon.png Homogeneous
bool

Parametri specifici pentru straturile de contur

Primii 11 parametri pentru contur sunt comuni mai multor tipuri de straturi. Click pe legaturi pentru a vedea definitiile acestora. Aici vom descrie doar parametrii specifici pentru stratul de contur.

In imaginea de mai jos este prezentat un strat de contur in actiune:

Image:Outline_Sample.png

Latimea liniei de contur

Parametrul pentru latimea conturului este o valoare a pixelilor exprimata in zecimale si reprezinta valoarea de baza a latimii pentru toate punctele curbei in acelasi timp. Lucreaza impreuna cu parametrul pentru valorile nodurilor-copil. Setarea latimii conturului la 1.0px da valoarea pentru latimea randata in acel nod cu ajutorul formulei: W = OLW * VW + 2E.

unde:

  • W = latimea rezultata a conturului acelui nod.
  • OLW = parametrul pentru intreaga latime a nodurilor (acesta este parametrul pentru latimea conturului).
  • VW = valoarea latimii specifice a nodului.
  • E = valoarea parametrului Expand.

Latimea marcatorului arata valoarea razei acelui nod (W/2).

Latimea la capat, folosita de fiecare nod este ((VertexWidth * OutLineWidth) + Expand*2):

Image:Outline-default.png Image:Outline-outline-width.png
starting image after doubling the value of 'outline width'

Este posibil sa specificati valori negative pentru latime, which kind of turns the vertex inside out. Here's an example where the left vertex has a negative width and the right has a positive width. Note how the edges of the bline between the vertices cross each other in the middle:

Image:Outline-negative-width.png Image:Outline-negative-width-selected.png

Expand

The Expand parameter is similar to the Outline Width parameter, but rather than being multiplied by each vertex's width, it is added to the radius of each vertex. In other words (2*Expand) is added to the diameter of each vertex.

The width that ends up being used for each vertex is ((VertexWidth * OutLineWidth) + Expand*2):

Image:Outline-default.png Image:Outline-expand.png
zero 'expand' non-zero 'expand'

Sharp cups

Enabling 'sharp cusps' makes the corners pointy when the tangents are split:

Image:Outline-default.png Image:Outline-sharp-cusps.png
no sharp cusps sharp cusps

Rounded Begin

Enabling 'rounded begin' makes the start of the outline rounded:

Image:Outline-default.png Image:Outline-rounded-begin.png
no rounded begin rounded begin

Rounded End

Enabling 'rounded end' makes the end of the outline rounded:

Image:Outline-default.png Image:Outline-rounded-end.png
no rounded end rounded end

Loopyness

This parameter currently does absolutely nothing at all!

Homogeneous

Enabling 'Homogeneous' changes the way that the width of the outline changes from one blinepoint to the next. Each point in the bline has its own width, and the bline has its own 'Outline Width' and 'Expand' parameters which are used to give the final width at each blinepoint. The 'Homogeneous' parameter controls how the width is interpolated between two neighbouring blinepoints:

  • When 'Homogeneous' isn't checked, the width is interpolated linearly with the spline's 't' parameter.
  • When 'Homogeneous' is checked, the width is interpolated linearly with the spline's length.

Turning off homogeneous often makes the fat end of a bline look lumpy. Maybe that's a bug:

Image:Outline-not-homogeneous.png Image:Outline-homogeneous.png
not homogeneous homogeneous

Misc

The 'antialias' checkbox isn't specific to the Outline layer, but it is particularly useful for the Outline layer. It makes the edges appear smoother:

Image:Outline-no-antialias.png Image:Outline-default.png
not antialiased antialiased


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