Scalar Quantities

Visualize scalar valued data at the nodes or edges of a curve network.

curve network scalar demo

Example:

#include "polyscope/curve_network.h"

std::vector<double> xC(nodes.size());
for (size_t i = 0; i < nodes.size(); i++) {
  xC[i] = nodes[i].x; // (use the x coordinate as sample data)
}

// visualize
polyscope::getCurveNetwork(curveNetworkName)->addNodeScalarQuantity("sample value", xC);

CurveNetwork::addNodeScalarQuantity(std::string name, const T& values, DataType type = DataType::STANDARD)

Add a scalar quantity to the nodes of the curve network.

values is the array of scalars at nodes. The type should be adaptable to a float scalar array. The length should be the number of nodes in the curve network.

CurveNetwork::addEdgeScalarQuantity(std::string name, const T& values, DataType type = DataType::STANDARD)

Add a scalar quantity to the edges of the curve network.

values is the array of scalars at edges . The type should be adaptable to a float scalar array. The length should be the number of edges in the curve network.

Categorical Scalars

Scalar quantities can also be used to visualize integer-valued labels such as categories, classes, segmentations, flags, etc.

Add the labels as a scalar quantity where the values just happen to be integers (each integer represents a particular class or label), and set DataType::CATEGORICAL. This will change the visualization to a different set of defaults, adjust some shading rules, and use a distinct color from the colormap for each label.

Scalar Quantity Options

These options and behaviors are available for all types of scalar quantities on any structure.

Parameter	Meaning	Getter	Setter	Persistent?
enabled	is the quantity enabled?	`bool isEnabled()`	`setEnabled(bool newVal)`	yes
color map	the color map to use	`std::string getColorMap()`	`setColorMap(std::string newMap)`	yes
map range	the lower and upper limits used when mapping the data in to the color map	`std::pair<double,double> getMapRange()`	`setMapRange(std::pair<double,double>)` and `resetMapRange()`	no
isolines enabled	are isolines shaded (default=`false`)	`bool getIsolinesEnabled()`	`setIsolinesEnabled(bool newVal)`	yes
isoline style	stripes or thin contour lines	`IsolineStyle getIsolineStyle()`	`setIsolineStyle(IsolineStyle newVal)`	yes
isoline period	period of isoline stripes, in data units	`float getIsolinePeriod()`	`setIsolinePeriod(float newVal)`	yes
isoline darkness	darkness of isoline stripes (default=`0.7`)	`float getIsolineDarkness()`	`setIsolineDarkness(float newVal)`	yes
contour thickness	thickness of isoline contour lines (default=`0.3`)	`float getIsolineContourThickness()`	`setIsolineContourThickness(float newVal)`	yes

(all setters return this to support chaining. setEnabled() returns generic quantity, so chain it last)