Triangle

Functions for 3D triangles represented as an array of three Vec3 (vertices).

[ [v1X, v1Y, v1Z], [v2X, v2Y, v2Z], [v3X, v3Y, v3Z] ]

Creation

var v1 = vec3_create(0, 0, 0);
var v2 = vec3_create(1, 0, 0);
var v3 = vec3_create(0, 1, 0);
var tri = tri_create(v1, v2, v3);

Function	Description
`tri_create(a?, b?, c?)`	Creates a new triangle.
`tri_set(tri, a, b, c)`	Sets the triangle vertices.
`tri_set_from_points_and_indices(tri, points, i0, i1, i2)`	Sets the triangle from a points array and indices.
`tri_copy(tri, src)`	Copies src triangle to tri.
`tri_clone(tri)`	Clones the triangle.
`tri_equals(tri, other)`	Checks if two triangles are equal.

Function	Returns	Description
`tri_get_area(tri)`	`real`	Calculates the area of the triangle.
`tri_get_midpoint(tri, target)`	`vec3`	Calculates the midpoint (centroid) of the triangle.
`tri_get_normal(tri, target)`	`vec3`	Calculates the normal of the triangle.
`tri_get_plane(tri, target)`	`plane`	Calculates the plane of the triangle.

Function	Returns	Description
`tri_get_barycoord(tri, point, target)`	`vec3?`	Calculates barycentric coordinates for a point.
`tri_get_interpolation(tri, point, v1, v2, v3, target)`	`vec3?`	Interpolates values over the triangle surface.

Function	Returns	Description
`tri_contains_point(tri, point)`	`bool`	Checks if the point lies within the triangle.
`tri_is_front_facing(tri, direction)`	`bool`	Checks if the triangle is front-facing relative to a direction.
`tri_closest_point_to_point(tri, p, target)`	`vec3`	Returns the closest point on the triangle for a given point.
`tri_intersects_box(tri, box)`	`bool`	Checks if the triangle intersects an AABB.