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Spline (Quadratic) | Substance 3D Designer

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  17. Release notes
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    2. All changes
    3. Version 14.1
    4. Version 14.0
    5. Version 13.1
    6. Version 13.0
    7. Version 12.4
    8. Version 12.3
    9. Version 12.2
    10. Version 12.1
    11. Version 11.3
    12. Version 11.2
    13. Version 2021.1 (11.1)
    14. Old versions
      1. Old versions
      2. Version 2020.2 (10.2)
      3. Version 2020.1 (10.1)
      4. Version 2019.3 (9.3)
      5. Version 2019.2 (9.2)
      6. Version 2019.1 (9.1)
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 p3, both 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

Output connectors

Parameters

Examples

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.

 

Start height

Float

Adjusts the height of the p1 point where a lower value means a lower or deeper location.
This impacts the height of the spline at p1.

End height

Float

Adjusts the height of the p3 point where a lower value means a lower or deeper location.
This impacts the thickness of the spline at p3.

Auto tangent height

Boolean

Adjusts the height of the p3 point where a lower value means a lower or deeper location.
This impacts the thickness of the spline at p3.

Tangent height

Float

Adjusts the height driven by the tangents controlled by the p2 point.
This impacts the height along the spline as it draws away from p1 and goes into p3.

 

Note: This parameter is only available when Auto tangent height is set to 'False'.

 

Start thickness

Float

Adjusts the thickness of the p1 point. This impacts the thickness of the spline at p1.


Note: Thickness is used by specific Spline nodes.

End thickness

Float

Adjusts the thickness of the p3 point. This impacts the thickness of the spline at p3.


Note: Thickness is used by specific Spline nodes.

Auto tangent thickness

Boolean

Automatically sets the thickness of the spline tangents to interpolate linearly from the Start Thickness to the End Thickness.


Note: Thickness is used by specific Spline nodes.

Tangent thickness

Float

Adjusts the thickness driven by the tangents controlled by the p2 point.
This impacts the thickness along the spline as it draws away from p1 and goes into p3.


Note: Thickness is used by specific Spline nodes.
Note 2: This parameter is only available when Auto tangent thickness is set to 'False'.

p1

Float2

Sets the position of the p1 point in texture space.

p2

Float2

Sets the position of the p2 point in texture space.
The p2 point controls the tangents of both p1 and p3 points.

p3

Float2

Sets the position of the p3 point in texture space.

Show tangents

Boolean

Displays the p1 point ‘out’ tangent and p3 point ‘in’ tangent in the Preview output.Inverts the direction of the spline.

Show direction helper

Boolean

Displays a dot at the start of the spline and an arrowhead at its end in the Preview output.

Show thickness envelope

Boolean

Displays additional lines at the edges of the spline’s thickness.

Segments amount

Integer

Adjusts the number of segments used to draw the spline visualization in the Preview output.
A higher value results in a smoother line.

Thickness (px)

Float

Adjusts the thickness in pixels of the spline visualization in the Preview output.

Examples

Spline (Quadratic): Example 1

Spline (Quadratic): Example 2

Spline (Quadratic): Demo

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