# Namespace: Math2D
# Table of contents
# Classes
# Interfaces
# Functions
- computeSquaredLineLength
- dist
- distSquared
- distToSegmentSquared
- intersectLineAndCircle
- intersectLines
- lineDist
# Functions
# computeSquaredLineLength
▸ computeSquaredLineLength(line: number[]): number
Computes the squared length of a line.
# Parameters
| Name | Type | Description |
|---|---|---|
line | number[] | An array of that forms a line via [x,y,z,x,y,z,...] tuples. |
Returns: number
# dist
▸ dist(ax: number, ay: number, bx: number, by: number, az?: number, bz?: number): number
Compute distance between two 2D points a and b.
# Parameters
| Name | Type | Description |
|---|---|---|
ax | number | Point a.x |
ay | number | Point a.y |
bx | number | Point b.x |
by | number | Point b.y |
az? | number | |
bz? | number |
Returns: number
between the two points
# distSquared
▸ distSquared(ax: number, ay: number, bx: number, by: number): number
Compute squared distance between two 2D points a and b.
# Parameters
| Name | Type | Description |
|---|---|---|
ax | number | Point a.x |
ay | number | Point a.y |
bx | number | Point b.x |
by | number | Point b.y |
Returns: number
Squared distance between the two points
# distToSegmentSquared
▸ distToSegmentSquared(px: number, py: number, l0x: number, l0y: number, l1x: number, l1y: number): number
Compute squared distance between a 2D point and a 2D line segment.
# Parameters
| Name | Type | Description |
|---|---|---|
px | number | Test point X |
py | number | Test point y |
l0x | number | Line segment start X |
l0y | number | Line segment start Y |
l1x | number | Line segment end X |
l1y | number | Line segment end Y |
Returns: number
Squared distance between point and line segment
# intersectLineAndCircle
▸ intersectLineAndCircle(xLine1: number, yLine1: number, xLine2: number, yLine2: number, radius: number, xCenter?: number, yCenter?: number): { x1: number ; x2?: number ; y1: number ; y2?: number } | undefined
Finds the intersections of a line and a circle.
# Parameters
| Name | Type | Default value | Description |
|---|---|---|---|
xLine1 | number | - | abscissa of first line point. |
yLine1 | number | - | ordinate of second line point. |
xLine2 | number | - | abscissa of second line point. |
yLine2 | number | - | ordinate of second line point. |
radius | number | - | circle radius. |
xCenter | number | 0 | abscissa of circle center. |
yCenter | number | 0 | ordinate of circle center. |
Returns: { x1: number ; x2?: number ; y1: number ; y2?: number } | undefined
coordinates of the intersections (1 if the line is tangent to the circle, 2 if it's secant) or undefined if there's no intersection.
# intersectLines
▸ intersectLines(x1: number, y1: number, x2: number, y2: number, x3: number, y3: number, x4: number, y4: number, result?: Vec2Like): Vec2Like | undefined
Computes the intersection point between two lines.
remarks
This functions computes the
line-line intersection (opens new window) of two lines given two points on each line.
# Parameters
| Name | Type | Description |
|---|---|---|
x1 | number | x coordinate of the first point of the first line. |
y1 | number | y coordinate of the first point of the first line. |
x2 | number | x coordinate of the second point of the first line. |
y2 | number | y coordinate of the second point of the first line. |
x3 | number | x coordinate of the first point of the second line. |
y3 | number | y coordinate of the first point of the second line. |
x4 | number | x coordinate of the second point of the second line. |
y4 | number | y coordinate of the second point of the second line. |
result | Vec2Like | The resulting point. |
Returns: Vec2Like | undefined
# lineDist
▸ lineDist(pts: GeoPointLike[]): number
求线的距离
# Parameters
| Name | Type |
|---|---|
pts | GeoPointLike[] |
Returns: number