ngx-trend
Version:
ngx-trend Angular component
68 lines • 9.32 kB
JavaScript
/* eslint-disable no-restricted-properties */
/** normalize
* This lets us translate a value from one scale to another.
*
* @param value - Our initial value to translate
* @param min - the current minimum value possible
* @param max - the current maximum value possible
* @param scaleMin - the min value of the scale we're translating to
* @param scaleMax - the max value of the scale we're translating to
* @returns the value on its new scale
*/
export function normalize(value, min, max, scaleMin = 0, scaleMax = 1) {
// If the `min` and `max` are the same value, it means our dataset is flat.
// For now, let's assume that flat data should be aligned to the bottom.
if (min === max) {
return scaleMin;
}
return scaleMin + (value - min) * (scaleMax - scaleMin) / (max - min);
}
/** moveTo
* the coordinate that lies at a midpoint between 2 lines, based on the radius
*
* @param to - Our initial point
* @param to.x - The x value of our initial point
* @param to.y - The y value of our initial point
* @param from - Our final point
* @param from.x - The x value of our final point
* @param from.y - The y value of our final point
* @param radius - The distance away from the final point
* @returns an object holding the x/y coordinates of the midpoint.
*/
export function moveTo(to, from, radius) {
const length = Math.sqrt((to.x - from.x) * (to.x - from.x) + (to.y - from.y) * (to.y - from.y));
const unitVector = { x: (to.x - from.x) / length, y: (to.y - from.y) / length };
return {
x: from.x + unitVector.x * radius,
y: from.y + unitVector.y * radius,
};
}
/** getDistanceBetween
* Simple formula derived from pythagoras to calculate the distance between
* 2 points on a plane.
*
* @param p1 - Our initial point
* @param p1.x - The x value of our initial point
* @param p1.y - The y value of our initial point
* @param p2 - Our final point
* @param p2.x - The x value of our final point
* @param p2.y - The y value of our final point
* @returns the distance between the points.
*/
export const getDistanceBetween = (p1, p2) => Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2));
/** checkForCollinearPoints
* Figure out if the midpoint fits perfectly on a line between the two others.
*
* @param p1 - Our initial point
* @param p1.x - The x value of our initial point
* @param p1.y - The y value of our initial point
* @param p2 - Our mid-point
* @param p2.x - The x value of our mid-point
* @param p2.y - The y value of our mid-point
* @param p3 - Our final point
* @param p3.x - The x value of our final point
* @param p3.y - The y value of our final point
* @returns whether or not p2 sits on the line between p1 and p3.
*/
export const checkForCollinearPoints = (p1, p2, p3) => (p1.y - p2.y) * (p1.x - p3.x) === (p1.y - p3.y) * (p1.x - p2.x);
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