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Diffstat (limited to 'src/javax/vecmath/Point4f.java')
| -rw-r--r-- | src/javax/vecmath/Point4f.java | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/src/javax/vecmath/Point4f.java b/src/javax/vecmath/Point4f.java new file mode 100644 index 0000000..8c7be5e --- /dev/null +++ b/src/javax/vecmath/Point4f.java @@ -0,0 +1,212 @@ +/* + * $RCSfile$ + * + * Copyright (c) 2004 Sun Microsystems, Inc. All rights reserved. + * + * Use is subject to license terms. + * + * $Revision$ + * $Date$ + * $State$ + */ + +package javax.vecmath; + +import java.lang.Math; + +/** + * A 4 element point represented by single precision floating point x,y,z,w + * coordinates. + * + */ +public class Point4f extends Tuple4f implements java.io.Serializable { + + + // Compatible with 1.1 + static final long serialVersionUID = 4643134103185764459L; + + /** + * Constructs and initializes a Point4f from the specified xyzw coordinates. + * @param x the x coordinate + * @param y the y coordinate + * @param z the z coordinate + * @param w the w coordinate + */ + public Point4f(float x, float y, float z, float w) + { + super(x,y,z,w); + } + + + /** + * Constructs and initializes a Point4f from the array of length 4. + * @param p the array of length 4 containing xyzw in order + */ + public Point4f(float[] p) + { + super(p); + } + + + /** + * Constructs and initializes a Point4f from the specified Point4f. + * @param p1 the Point4f containing the initialization x y z w data + */ + public Point4f(Point4f p1) + { + super(p1); + } + + + /** + * Constructs and initializes a Point4f from the specified Point4d. + * @param p1 the Point4d containing the initialization x y z w data + */ + public Point4f(Point4d p1) + { + super(p1); + } + + + /** + * Constructs and initializes a Point4f from the specified Tuple4f. + * @param t1 the Tuple4f containing the initialization x y z w data + */ + public Point4f(Tuple4f t1) + { + super(t1); + } + + + /** + * Constructs and initializes a Point4f from the specified Tuple4d. + * @param t1 the Tuple4d containing the initialization x y z w data + */ + public Point4f(Tuple4d t1) + { + super(t1); + } + + + /** + * Constructs and initializes a Point4f from the specified Tuple3f. + * The x,y,z components of this point are set to the corresponding + * components of tuple t1. The w component of this point + * is set to 1. + * @param t1 the tuple to be copied + * + * @since Java 3D 1.2 + */ + public Point4f(Tuple3f t1) { + super(t1.x, t1.y, t1.z, 1.0f); + } + + + /** + * Constructs and initializes a Point4f to (0,0,0,0). + */ + public Point4f() + { + super(); + } + + + /** + * Sets the x,y,z components of this point to the corresponding + * components of tuple t1. The w component of this point + * is set to 1. + * @param t1 the tuple to be copied + * + * @since Java 3D 1.2 + */ + public final void set(Tuple3f t1) { + this.x = t1.x; + this.y = t1.y; + this.z = t1.z; + this.w = 1.0f; + } + + + /** + * Computes the square of the distance between this point and point p1. + * @param p1 the other point + * @return the square of distance between these two points as a float + */ + public final float distanceSquared(Point4f p1) + { + float dx, dy, dz, dw; + + dx = this.x-p1.x; + dy = this.y-p1.y; + dz = this.z-p1.z; + dw = this.w-p1.w; + return (dx*dx+dy*dy+dz*dz+dw*dw); + } + + + /** + * Computes the distance between this point and point p1. + * @param p1 the other point + * @return the distance between the two points + */ + public final float distance(Point4f p1) + { + float dx, dy, dz, dw; + + dx = this.x-p1.x; + dy = this.y-p1.y; + dz = this.z-p1.z; + dw = this.w-p1.w; + return (float) Math.sqrt(dx*dx+dy*dy+dz*dz+dw*dw); + } + + + /** + * Computes the L-1 (Manhattan) distance between this point and + * point p1. The L-1 distance is equal to: + * abs(x1-x2) + abs(y1-y2) + abs(z1-z2) + abs(w1-w2). + * @param p1 the other point + * @return the L-1 distance + */ + public final float distanceL1(Point4f p1) + { + return( Math.abs(this.x-p1.x) + Math.abs(this.y-p1.y) + Math.abs(this.z-p1.z) + Math.abs(this.w-p1.w)); + } + + + /** + * Computes the L-infinite distance between this point and + * point p1. The L-infinite distance is equal to + * MAX[abs(x1-x2), abs(y1-y2), abs(z1-z2), abs(w1-w2)]. + * @param p1 the other point + * @return the L-infinite distance + */ + public final float distanceLinf(Point4f p1) + { + float t1, t2; + t1 = Math.max( Math.abs(this.x-p1.x), Math.abs(this.y-p1.y)); + t2 = Math.max( Math.abs(this.z-p1.z), Math.abs(this.w-p1.w)); + + return(Math.max(t1,t2)); + + } + + /** + * Multiplies each of the x,y,z components of the Point4f parameter + * by 1/w, places the projected values into this point, and places + * a 1 as the w parameter of this point. + * @param p1 the source Point4f, which is not modified + */ + public final void project(Point4f p1) + { + float oneOw; + + oneOw = 1/p1.w; + x = p1.x*oneOw; + y = p1.y*oneOw; + z = p1.z*oneOw; + w = 1.0f; + + } + +} |