Struct ChartData 

pub struct ChartData {
    pub vertices: Vec<Vertex>,
    pub viewport_width: f32,
    pub viewport_height: f32,
}

Chart data container

Fields

vertices: Vec<Vertex>

viewport_width: f32

viewport_height: f32

Implementations

impl ChartData

pub fn new(width: f32, height: f32) -> Self

pub fn add_point(&mut self, point: Point2D, color: Color, size: f32)

Add a point to the chart

Parameters

• point - The 2D coordinates (x, y) of the point to add
• color - The RGBA color for this point (values 0.0-1.0)
• size - The size/radius of the point in pixels

pub fn from_scatter( x: &[f32], y: &[f32], color: Option<Color>, size: Option<f32>, width: f32, height: f32, ) -> Self

Create scatter plot data from raw arrays

Converts raw x and y coordinate arrays into normalized vertex data ready for GPU rendering. By default, normalizes coordinates to the [-1, 1] range required by GPU clip space.

Parameters

• x - Array of x-coordinates for each point
• y - Array of y-coordinates for each point (must be same length as x)
• color - Optional color for all points. If None, uses default blue color
• size - Optional size for all points in pixels. If None, defaults to 2.0
• width - Viewport width in pixels
• height - Viewport height in pixels

Returns

A new ChartData instance with normalized vertices ready for rendering

pub fn from_scatter_with_range( x: &[f32], y: &[f32], color: Option<Color>, size: Option<f32>, width: f32, height: f32, x_range: Option<(f32, f32)>, y_range: Option<(f32, f32)>, ) -> Self

Create scatter plot data with custom normalization ranges

Converts raw x and y coordinate arrays into normalized vertex data with user-specified output ranges. This allows control over the coordinate mapping for custom viewports.

Parameters

• x - Array of x-coordinates for each point
• y - Array of y-coordinates for each point (must be same length as x)
• color - Optional color for all points. If None, uses default blue color
• size - Optional size for all points in pixels. If None, defaults to 2.0
• width - Viewport width in pixels
• height - Viewport height in pixels
• x_range - Optional custom output range for x (min, max). If None, uses [-1.0, 1.0]
• y_range - Optional custom output range for y (min, max). If None, uses [-1.0, 1.0]

Returns

A new ChartData instance with normalized vertices

Example

use helion_core::data::ChartData;
 
let x_data = vec![1.0, 2.0, 3.0];
let y_data = vec![4.0, 5.0, 6.0];
 
// Map to [0, 1] range instead of [-1, 1]
let data = ChartData::from_scatter_with_range(
    &x_data, &y_data, None, None, 800.0, 600.0,
    Some((0.0, 1.0)),  // x maps to [0, 1]
    Some((0.0, 1.0)),  // y maps to [0, 1]
);