maspack.geometry

Class TriangleIntersector

java.lang.Object

maspack.geometry.TriangleIntersector

public class TriangleIntersector
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
TriangleIntersector()

Method Summary

Modifier and Type	Method and Description
double	getEpsilon()
int	intersect(Point3d v0, Point3d v1, Point3d v2, Point3d pos, Vector3d dir, Vector3d duv) Determines the bary centric coordinates of a ray hitting a triangle.
java.util.ArrayList<Point3d>	intersectTrianglePlane(Point3d p0, Point3d p1, Point3d p2, Plane plane)
Point3d[]	intersectTriangleTriangle(Vector3d p1, Vector3d q1, Vector3d r1, Vector3d p2, Vector3d q2, Vector3d r2)
double	nearestpoint(Point3d v0, Point3d v1, Point3d v2, Point3d p, Point3d closest, Vector2d uv) Finds the nearest distance between a point and a triangle.
void	setEpsilon(double e)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TriangleIntersector

public TriangleIntersector()

Method Detail

setEpsilon

public void setEpsilon(double e)

getEpsilon

public double getEpsilon()

intersectTriangleTriangle

public Point3d[] intersectTriangleTriangle(Vector3d p1,
                                           Vector3d q1,
                                           Vector3d r1,
                                           Vector3d p2,
                                           Vector3d q2,
                                           Vector3d r2)

intersect

public int intersect(Point3d v0,
                     Point3d v1,
                     Point3d v2,
                     Point3d pos,
                     Vector3d dir,
                     Vector3d duv)

Determines the bary centric coordinates of a ray hitting a triangle.

Parameters:

v0 - The first vertex.

v1 - The second vertex.

v2 - The third vertex.

pos - The ray's origin.

dir - The ray's direction.

duv - The resulting coordinates of the projection in the space of the ray and vector with t being the distance along the vector and u/v being barycentric coordinates.

nearestpoint

public double nearestpoint(Point3d v0,
                           Point3d v1,
                           Point3d v2,
                           Point3d p,
                           Point3d closest,
                           Vector2d uv)

Finds the nearest distance between a point and a triangle.

Parameters:

v0 - The first vertice.

v1 - The second vertice.

v2 - The third vertice.

p - The point to measure from.

closest - (optional) Returns the closest point to p on the triangle.

uv - (optional) Returns the barycentric coordinates of the nearest point where u and v are the weights for vertices 1 and 2 respectively.

Returns:

The distance from point p to the nearest point on triangle v0, v1 and v2.

intersectTrianglePlane

public java.util.ArrayList<Point3d> intersectTrianglePlane(Point3d p0,
                                                           Point3d p1,
                                                           Point3d p2,
                                                           Plane plane)