Points¶

Overview¶

struct Points¶

Structure to hold 2D scattered points data.

The omdi::Points struct stores and owns vectors of x and y coordinates representing scattered (non-gridded) 2D points. Data is copied into the struct on construction, so the caller does not need to keep the source arrays alive after creating a omdi::Points instance.

It is typically used in plotting operations such as scatter plots, line plots, or marking features on 2D domains.

Usage example¶

Basic usage with std::vector arrays:

auto xs = std::vector<float> { 0.0f, 1.0f, 2.0f };
auto ys = std::vector<float> { 1.0f, 0.5f, 0.25f };

auto pts = omdi::Points(xs, ys, 3);

// pts.x and pts.y are independent copies of xs and ys.
// The source vectors may safely go out of scope.

Data members¶

std::vector<float> Points::x¶

Vector of X coordinates.

Contains omdi::Points::npoints elements.

std::vector<float> Points::y¶

Vector of Y coordinates.

Contains omdi::Points::npoints elements.

size_t Points::npoints¶: Number of scattered points represented by this structure.

Constructor¶

Points::Points(const std::vector<float> &x, const std::vector<float> &y, size_t npoints)¶

Construct a omdi::Points object from coordinate vectors.

Parameters:

x – Vector of X coordinates (length npoints).
y – Vector of Y coordinates (length npoints).
npoints – Number of points in the arrays.

Both vectors are copied into the struct; the caller is free to modify or destroy the originals after construction.

Notes¶

omdi::Points owns its coordinate data; no external arrays need to remain alive after construction.
Both vectors must contain at least omdi::Points::npoints elements.
The struct is suitable for passing point clouds into plotting primitives, proximity queries, or geometric algorithms.