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author | 0x277F <0x277F@gmail.com> | 2016-02-05 21:08:42 -0700 |
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committer | md_5 <git@md-5.net> | 2016-02-07 10:06:22 +1100 |
commit | 01d1820664a5f881665b84b28871dadd132deaef (patch) | |
tree | ba9c762891a705601d3f4efd5d5b5e4442ba86ef /src/main | |
parent | f517b6e6a95a7a7f5498bce806a9b997e433f75b (diff) | |
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Add non-mutative getCrossProduct method to Vector.
Diffstat (limited to 'src/main')
-rw-r--r-- | src/main/java/org/bukkit/util/Vector.java | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/main/java/org/bukkit/util/Vector.java b/src/main/java/org/bukkit/util/Vector.java index 685148ec..cebd3ccb 100644 --- a/src/main/java/org/bukkit/util/Vector.java +++ b/src/main/java/org/bukkit/util/Vector.java @@ -304,6 +304,25 @@ public class Vector implements Cloneable, ConfigurationSerializable { } /** + * Calculates the cross product of this vector with another without mutating + * the original. The cross product is defined as: + * <ul> + * <li>x = y1 * z2 - y2 * z1 + * <li>y = z1 * x2 - z2 * x1 + * <li>z = x1 * y2 - x2 * y1 + * </ul> + * + * @param o The other vector + * @return a new vector + */ + public Vector getCrossProduct(Vector o) { + double x = this.y * o.z - o.y * this.z; + double y = this.z * o.x - o.z * this.x; + double z = this.x * o.y - o.x * this.y; + return new Vector(x, y, z); + } + + /** * Converts this vector to a unit vector (a vector with length of 1). * * @return the same vector |