kite3d/io.github.yuroyami.kite3d.math/Triangle

Triangle

class Triangle(var a: Vector3 = Vector3(), var b: Vector3 = Vector3(), var c: Vector3 = Vector3())

A geometric triangle as defined by three vectors representing its three corners.

Triangles are mutable and not thread-safe. Use each instance from one thread only. Most methods change this and return it for chaining.

The constructor stores the given Vector3 instances by reference, so Triangle(v, v, v) shares v across all three corners.

Constructors

Triangle

constructor(a: Vector3 = Vector3(), b: Vector3 = Vector3(), c: Vector3 = Vector3())

Types

Companion

object Companion

Properties

var a: Vector3

The first corner of the triangle.

var b: Vector3

The second corner of the triangle.

var c: Vector3

The third corner of the triangle.

Functions

clone

fun clone(): Triangle

Returns a new triangle with copied values from this instance.

closestPointToPoint

fun closestPointToPoint(p: Vector3, target: Vector3): Vector3

Returns the closest point on the triangle to the given point.

containsPoint

fun containsPoint(point: Vector3): Boolean

Returns true if the given point, when projected onto the plane of the triangle, lies within the triangle.

copy

fun copy(triangle: Triangle): Triangle

Copies the values of the given triangle to this instance.

equals

open operator override fun equals(other: Any?): Boolean

Structural equality: true when other is a Triangle with equal corners, each compared with Vector3.equals, so NaN != NaN.

getArea

fun getArea(): Double

Computes the area of the triangle.

getBarycoord

fun getBarycoord(point: Vector3, target: Vector3): Vector3?

Computes the barycentric coordinates of point in this triangle. Returns null (and sets target to zero) if the triangle is degenerate.

getInterpolation

fun getInterpolation(point: Vector3, v1: Vector3, v2: Vector3, v3: Vector3, target: Vector3): Vector3?

Computes the value barycentrically interpolated for the given point on the triangle. Returns null if the triangle is degenerate.

getMidpoint

fun getMidpoint(target: Vector3): Vector3

Computes the midpoint of the triangle.

getNormal

fun getNormal(target: Vector3): Vector3

Computes the normal of the triangle.

getPlane

fun getPlane(target: Plane): Plane

Computes a plane the triangle lies within.

hashCode

open override fun hashCode(): Int

intersectsBox

fun intersectsBox(box: Box3): Boolean

Returns true if this triangle intersects with the given box.

isFrontFacing

fun isFrontFacing(direction: Vector3): Boolean

Returns true if the triangle is oriented towards the given direction.

set

fun set(a: Vector3, b: Vector3, c: Vector3): Triangle

Sets the triangle's vertices by copying the given values.

setFromAttributeAndIndices

fun setFromAttributeAndIndices(attribute: AttributeLike, i0: Int, i1: Int, i2: Int): Triangle

Sets the triangle's vertices by copying the given attribute values.

setFromPointsAndIndices

fun setFromPointsAndIndices(points: List<Vector3>, i0: Int, i1: Int, i2: Int): Triangle

Sets the triangle's vertices by copying the given array values.

toString

open override fun toString(): String