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Spline (Quadratic) | Substance 3D Designer

Spline (Quadratic): icon

In: Spline & Path Tools > Spline Tools

Description

Generates a single spline between two points p1 and p3 at arbitrary locations.

The trajectory of the spline is controlled by the ‘out’ tangent of p1 and the ‘in’ tangent of p3both controlled by a single point p3.

The span of the arc formed by the spline is adjustable, so that some of its trajectory from its extremities can remain straight.

In this page


Input connectors

Preview

Grayscale

The preview of the input splines as a grayscale image.

Spline Coords

Color

The coordinates of the input splines’ points encoded in the RGBA channels of a color image:

R - X position

G - Y position

B - Height

A - Packed data:
        - Sign: Spline is closed (negative) or open (positive);
        - Absolute value: Thickness + 1.

Spline Data

Color

Additional data of the input splines encoded in the RGBA channels of a color image:
R - Tangents X
G - Tangents Y
B - Tangents Z
A - Unused

Spline Amount

Integer

The number of input splines.


Output connectors

Preview

Grayscale

The preview of the output splines as a grayscale image.

Spline Coords

Color

The coordinates of the output splines’ points encoded in the RGBA channels of a color image:
R - X position
G - Y position
B - Height
A - Packed data:
        - Sign: Spline is closed (negative) or open (positive);
        - Absolute value: Thickness + 1.

Spline Data

Color

Additional data of the output splines encoded in the RGBA channels of a color image:
R - Tangents X
G - Tangents Y

B - Tangents Z
A - Unused

Spline Amount

Integer

The number of output splines.


Parameters

Flip direction

Boolean

Inverts the direction of the spline.

Uniform distribution

Boolean

When True, the points of the spline are evenly spaced from start to end..

 

Append input spline

Boolean

Adds the generated spline to the end of the list of splines connected to the Spline inputs..

 

Non-square correction

Boolean

Adjust the points’ positions and thickness to retain the spline shape in non-square resolutions.

This also impacts uniform distribution.

 

Smoothness

Float

Adjusts the span of the arc formed by the spline, where 1 means the full length of the spline is arched and 0 means the spline is entirely straight.

The arc progresses from point p3 along the spline up to its extremities.

 


Examples

Spline (Quadratic): Example 1

Spline (Quadratic): Example 2

Spline (Quadratic): Demo

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