Curves

Curve Vectors

Vectors relevant to orientations on a curve: Normal, Tangent and Bitangent

Outputs

Name	Type	Description	Default
Normal	Vector	The normal of the control point. Used for calculating the rotation for the point and when calculating Curve to Mesh	[0.0, 0.0, 0.0]
Tangent	Vector	The tangent of the point, which is calculated as the direction from the previous point to the next point	[0.0, 0.0, 0.0]
Bitangent	Vector	The cross product of the Normal and the Tangent	[0.0, 0.0, 0.0]

Curve Offset Dihedral

Calculate the Dihredral angle between the current point and another point offset along the curve, using their Normals

Offset from the current point a number of points, then use their Position and Normal to calculat a dihdral angle between them

Inputs

Name	Type	Description	Default
Position	Vector	The vector to use as the B & C components for Dihedral Angle calculation	Position
Normal	Vector	The normal that will be added the Position to create the A & D components of the dihedral calcaulation	Normal
Index	Int	The index of the current point to calculate from	Index
Offset	Int	The number of points to offset before calculating the angle	None

Outputs

Name	Type	Description	Default
Angle	Float	The calculated angle in radians	0.0

Curve Transform

The transform for the point, combining the Position and Curve Rotation using Normal and Tangent

Calculates the transformation matrix for the point on the curve. Position is taken from the Position, Rotation is calculated from the Normal and Tangent values, and the Radius drives the scale

Outputs

Name	Type	Description	Default
Transform	Matrix	The combine 4X4 transformation matrix for the point of the curve	None

Curve Rotation

The Rotation for the point, using the Normal and Tangent of the point

Computes the rotation of the point on the curve, by default using the Normal attribute and the Tangent axis

Inputs

Name	Type	Description	Default
Normal	Vector	The default direction to use as the Secondary Axis / X axis when computing the rotation	Normal

Outputs

Name	Type	Description	Default
Rotation	Rotation	The computed rotation for the point on the curve	<Euler (x=0.0000, y=0.0000, z=0.0000), order='XYZ'>

Cumulative Length

The length of the current point, added onto the cumulative length with all previous splines in the curve

Outputs

Name	Type	Description	Default
Length	Float	The length along the current spline added to all previous spline lengths	0.0

Curve Offset Dot

Calculate the dot product of the current point and another, using their Normal attributes. Also returns the dot producted thresholded for a particular cutoff

Inputs

Name	Type	Description	Default
Normal	Vector		Normal
Offset	Int		None
Threshold Direction	Menu		Less Than
Threshold Cutoff	Float		-0.9
Rotation Axis	Vector		[0.0, 0.0, 1.0]
Rotation Amount	Float		3.142

Outputs

Name	Type	Description	Default
Thresholded	Bool		False
Leading	Int		None
Rotation	Rotation		<Euler (x=0.0000, y=0.0000, z=0.0000), order='XYZ'>

Offset Point Along Curve

Return the Factor or Length of a point, when offset an amount of points along their curve. A value of 1.5 returns the Factor / Length that is half way between the two points that are +1 and +2 from the current Point Index,

Useful for sampling the same curve, at a different point along the curve. Helps with interpolating along a bezier curve without having to evaluate to the intermediate points first

Offset along the current point’s curve, by a number of points. 1 offsets by a single point on the curve (regardless of how far away they are). 1.5 offsets to half way between Point Index + 1 and Point Index + 2, returning the Length and the Factor for this point on the curve

Inputs

Name	Type	Description	Default
Point Index	Int	The field to evaluate at the given Index + Offset on the point domain	Index
Offset	Float	The offset to apply to the Index before evaluating the input field	0.0

Outputs

Name	Type	Description	Default
Is Off Spline	Bool	The field evaluated at the offset Index value	False
Factor	Float	The field evaluated at the offset Index value	0.0
Length	Float	The field evaluated at the offset Index value	0.0
Index A	Int	The field evaluated at the offset Index value	None
Index B	Int	The field evaluated at the offset Index value	None

Curve Endpoint Values

Integer values for the ends of splines, specifying the start and end sizes

Output a different integer value for the endpoints of a curve and the middle of a curve

Inputs

Name	Type	Description	Default
Start Size	Int	The size of the starting points of the curve	None
Start Value	Int	The value to output for the starting points of the curve	None
Other Value	Int	The value for the points which aren’t part of the start or end points	None
End Size	Int	The size of the end points	None
End Value	Int	The value that is returned for the end points of the curve	None

Outputs

Name	Type	Description	Default
Value	Int	The value for the point, determined by the inputs if it is in the start, end or ‘other’ region	None
Start Selection	Bool	The n points at the start of a spline determined by Start Size	False
End Selection	Bool	The n points at the end of a spline determined by End Size	False

Curve Visualize

Visualize curves, instancing Gimbals with the resulting curve rotation and positions

Inputs

Name	Type	Description	Default
Curve	Geometry		None
Selection	Bool		True
Position	Vector		Position
Normal	Vector		Normal
Handles	Bool		False
Value	Float		3.0
Arrow Size	Float		2.0

Outputs

Name	Type	Description	Default
Instances	Geometry		None

Curve Custom Profile

Curve to Mesh but with the potential for a custom profile, with fields for custom rotations and scaling along the curve while generating the geometry

Inputs

Name	Type	Description	Default
Curve	Geometry		None
Subdivisions	Int		None
Profile Type	Menu		Custom Profile
Profile Rotation	Rotation		<Euler (x=0.0000, y=0.0000, z=0.0000), order='XYZ'>
Profile Scale	Vector		[1.0, 1.0, 1.0]
Profile Curve	Geometry		None
Profile Resolution	Int		None
Profile Radius	Float		1.0
Profile Rotation	Float		0.785

Outputs

Name	Type	Description	Default
Geometry	Geometry		None