Frustum

Camera view frustum using 6 planes, stored as [[nx, ny, nz, d], ...]. Plane order: Left, Right, Bottom, Top, Near, Far. Normals point inward.

Functions Reference

Function	Returns	Description
`frustum_create()`	`Array`	Creates a new frustum (6 planes).
`frustum_clone(f)`	`Array`	Returns a copy of the frustum.
`frustum_copy(f, src)`	-	Copies planes from `src`.
`frustum_set_from_matrix(f, m)`	-	Extracts planes from a projection/view matrix.
`frustum_set(f, p0, p1, p2, p3, p4, p5)`	-	Copies six planes into the frustum.
`frustum_set_from_projection_matrix(f, m, reversedDepth=false)`	-	Extracts planes from projection matrix; swaps near/far when `reversedDepth` is true.

Function	Returns	Description
`frustum_intersects_sphere(f, s)`	`boolean`	True if frustum intersects sphere.
`frustum_intersects_box(f, b)`	`boolean`	True if frustum intersects box.
`frustum_contains_point(f, x, y, z)`	`boolean`	True if point is inside frustum.
`frustum_contains_point_vec(f, v)`	`boolean`	True if `v = [x,y,z]` is inside frustum.