Triangle
A geometric triangle as defined by three Vector3s representing its three corners.
Constructor
Triangle
function Triangle( a: Vector3, b: Vector3, c: Vector3 ): void;
a - the first corner of the triangle. Default is a
Vector3 at (0, 0, 0).
b - the second corner of the triangle. Default is a
Vector3 at (0, 0, 0).
c - the final corner of the triangle. Default is a
Vector3 at (0, 0, 0).
Creates a new Triangle.
Properties
a
a: Vector3;
The first corner of the triangle. Default is a Vector3
at (0, 0, 0).
b
b: Vector3;
The second corner of the triangle. Default is a
Vector3 at (0, 0, 0).
c
c: Vector3;
The final corner of the triangle. Default is a Vector3
at (0, 0, 0).
Methods
clone
function clone( ): Triangle;
Returns a new triangle with the same .a, .b and .c properties as this one.
closestPointToPoint
function closestPointToPoint( point: Vector3, target: Vector3 ): Vector3;
point - Vector3
target — the result will be copied into this Vector3.
Returns the closest point on the triangle to point.
containsPoint
function containsPoint( point: Vector3 ): Boolean;
Returns true if the passed point, when projected onto the plane of the triangle, lies within the triangle.
copy
function copy( triangle: Triangle ): this;
Copies the values of the passed triangles's .a, .b and .c properties to this triangle.
equals
function equals( triangle: Triangle ): Boolean;
Returns true if the two triangles have identical .a, .b and .c properties.
getArea
function getArea( ): Float;
Return the area of the triangle.
getBarycoord
function getBarycoord( point: Vector3, target: Vector3 ): Vector3;
point - Vector3
target — the result will be copied into this Vector3.
Return a barycentric coordinate from the given vector.
Picture of barycentric coordinates
getMidpoint
function getMidpoint( target: Vector3 ): Vector3;
target — the result will be copied into this Vector3.
Calculate the midpoint of the triangle.
getNormal
function getNormal( target: Vector3 ): Vector3;
target — the result will be copied into this Vector3.
Calculate the normal vector of the triangle.
getPlane
function getPlane( target: Plane ): Plane;
target — the result will be copied into this Plane.
Calculate a plane based on the triangle. .
getInterpolation
function getInterpolation( point: Vector3, p1: Vector3, p2: Vector3, p3:
Vector3, v1: Vector, v2: Vector, v3: Vector, target: Vector ): Vector;
point - Position of interpolated point.
p1 - Position of first vertex.
p2 - Position of second vertex.
p3 - Position of third vertex.
v1 - Value of first vertex.
v2 - Value of second vertex.
v3 - Value of third vertex.
target — Result will be copied into this Vector.
Returns the value barycentrically interpolated for the given point on the triangle.
intersectsBox
function intersectsBox( box: Box3 ): Boolean;
box - Box to check for intersection against.
Determines whether or not this triangle intersects box.
isFrontFacing
function isFrontFacing( direction: Vector3 ): Boolean;
direction - The direction to test.
Whether the triangle is oriented towards the given direction or not.
set
function set( a: Vector3, b: Vector3, c: Vector3 ): this;
Sets the triangle's .a, .b and .c properties to the passed
.ector3.
Please note that this method only copies the values from the given objects.
setFromAttributeAndIndices
function setFromAttributeAndIndices( attribute: BufferAttribute, i0: Integer,
i1: Integer, i2: Integer ): this;
attribute - BufferAttribute of vertex data
i0 - Integer index
i1 - Integer index
i2 - Integer index
Sets the triangle's vertices from the buffer attribute vertex data.
setFromPointsAndIndices
function setFromPointsAndIndices( points: Array, i0: Integer, i1: Integer, i2:
Integer ): this;
points - Array of Vector3s
i0 - Integer index
i1 - Integer index
i2 - Integer index
Sets the triangle's vectors to the vectors in the array.