TriangleStrip

Source (.js)Source (.d.ts)

Introduction

vtkTriangleStrip is a concrete implementation of vtkCell to represent a 2D triangle strip. A triangle strip is a compact representation of triangles connected edge to edge in strip fashion. The connectivity of a triangle strip is three points defining an initial triangle, then for each additional triangle, a single point that, combined with the previous two points, defines the next triangle.

See Also

vtkCell

Methods

cellBoundary

Get the cell boundary of the triangle strip.

Argument	Type	Required	Description
subId	Number	Yes	The sub-id of the cell.
pcoords	Vector3	Yes	The parametric coordinates.
pts	Array[Vector3]	Yes	The points of the cell.

clip

Clip the strip against the given scalar value by clipping each of its triangles in turn, appending the results to tris.

Argument	Type	Required	Description
value	Number	Yes	The clipping value
cellScalars	vtkDataArray	Yes	The scalar value at each strip point
locator	vtkPointLocator	Yes	Merges the generated points
tris	vtkCellArray	Yes	Receives the generated triangles
inPd	vtkDataSetAttributes	Yes	Input point data
outPd	vtkDataSetAttributes	Yes	Output point data
inCd	vtkDataSetAttributes	Yes	Input cell data
cellId	Number	Yes	The id of this cell in the input
outCd	vtkDataSetAttributes	Yes	Output cell data
insideOut	Boolean	Yes	Keep the region below the value instead of above

contour

Not implemented: always throws.

derivatives

Derivatives of the triangle strip.

Argument	Type	Required	Description
subId	Number	Yes	- The sub-id of the triangle.
pcoords	Vector3	Yes	- The parametric coordinates.
values	Array[Number]	Yes	- The values at the points.
dim	Number	Yes	- The dimension.
derivs	Array[Number]	Yes	- The derivatives.

evaluateLocation

Evaluate the location of a point in the triangle strip.

Argument	Type	Required	Description
subId	Number	Yes	The triangle within the strip to evaluate against.
pcoords	Vector3	Yes	The parametric coordinates of the point.
x	Vector3	Yes	The interpolated position, written in place.
weights	Array[Number]	Yes	The interpolation weights, written in place.

evaluatePosition

Evaluate the position of a point in the triangle strip.

Argument	Type	Required	Description
x	Vector3	Yes	The point to evaluate.
closestPoint	Vector3	Yes	The closest point on the triangle strip.
pcoords	Vector3	Yes	The parametric coordinates.
dist2	Array[Number]	Yes	The squared distance from the point to the triangle strip.
weights	Array[Number]	Yes	The interpolation weights.

extend

Method used to decorate a given object (publicAPI+model) with vtkTriangle characteristics.

Argument	Type	Required	Description
publicAPI		Yes	object on which methods will be bounds (public)
model		Yes	object on which data structure will be bounds (protected)
initialValues	ITriangleStripInitialValues	No	(default: {})

getCellDimension

Get the topological dimensional of the cell (0, 1, 2 or 3).

getCellType

Get the cell type.

getEdge

Get the edge of the triangle strip.

Argument	Type	Required	Description
edgeId	Number	Yes	The edge ID to retrieve.

Returns

Type	Description
vtkLine	The edge corresponding to the edge ID.

getNumberOfEdges

Get the number of edges in the triangle strip.

getNumberOfFaces

Get the number of faces in the triangle strip.

getParametricCenter

Get the parametric center of the triangle strip.

Argument	Type	Required	Description
pcoords	Vector3	Yes	- The parametric coordinates.

Returns

Type	Description
Number	The parametric center.

getPointArray

Get the point array of the triangle strip.

Returns

Type	Description
Array[Number]	The point array.

initialize

Initialize the triangle strip with points and point IDs.

Argument	Type	Required	Description
points	vtkPoints	Yes	The points of the triangle strip.
pointsIds	Array[Number]	Yes	The point IDs of the triangle strip.

intersectWithLine

Intersects a line with the triangle strip.

Argument	Type	Required	Description
p1	Vector3	Yes	Start point of the line
p2	Vector3	Yes	End point of the line
tol	Number	Yes	Tolerance for intersection
x	Vector3	Yes	Intersection point
pcoords	Vector3	Yes	Parametric coordinates of the intersection

Returns

Type	Description
Boolean	True if the line intersects the triangle strip

newInstance

Method used to create a new instance of vtkTriangle.

Argument	Type	Required	Description
initialValues	ITriangleStripInitialValues	No	for pre-setting some of its content

triangulate

Triangulate the triangle strip.

Returns

Type	Description
Boolean	True if the triangulation is successful.