Rev 835 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 835 | chris | 1 | package com.gebauz.bauzoid.math; |
| 2 | |||
| 3 | public class Vector3 |
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| 4 | { |
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| 5 | |||
| 6 | public float x; |
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| 7 | public float y; |
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| 8 | public float z; |
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| 9 | |||
| 10 | public Vector3() |
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| 11 | { |
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| 12 | } |
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| 13 | |||
| 14 | public Vector3(float _x, float _y, float _z) |
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| 15 | { |
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| 1001 | chris | 16 | set(_x, _y, _z); |
| 17 | } |
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| 18 | |||
| 19 | public void set(float _x, float _y, float _z) |
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| 20 | { |
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| 835 | chris | 21 | x = _x; |
| 22 | y = _y; |
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| 23 | z = _z; |
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| 24 | } |
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| 25 | |||
| 26 | public void normalize() |
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| 27 | { |
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| 28 | float len = length(); |
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| 29 | if (len != 0.0f) |
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| 30 | { |
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| 31 | x /= len; |
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| 32 | y /= len; |
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| 33 | z /= len; |
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| 34 | } |
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| 35 | } |
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| 36 | |||
| 37 | public float length() |
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| 38 | { |
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| 39 | float squared = squaredLength(); |
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| 40 | return (float)Math.sqrt(squared); |
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| 41 | } |
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| 42 | |||
| 43 | public void setLength(float newLength) |
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| 44 | { |
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| 45 | normalize(); |
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| 46 | x *= newLength; |
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| 47 | y *= newLength; |
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| 48 | z *= newLength; |
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| 49 | } |
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| 50 | |||
| 51 | public boolean isZero() |
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| 52 | { |
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| 53 | return ((x == 0.0f) && (y == 0.0f) && (z == 0.0f)); |
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| 54 | } |
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| 55 | |||
| 56 | public float squaredLength() |
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| 57 | { |
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| 58 | return (x*x + y*y + z*z); |
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| 59 | } |
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| 60 | |||
| 61 | public void addVector(Vector3 v) |
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| 62 | { |
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| 63 | x += v.x; |
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| 64 | y += v.y; |
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| 65 | z += v.z; |
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| 66 | } |
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| 67 | |||
| 68 | public void subtractVector(Vector3 v) |
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| 69 | { |
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| 70 | x -= v.x; |
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| 71 | y -= v.y; |
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| 72 | z -= v.z; |
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| 73 | } |
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| 74 | |||
| 75 | public float dotProduct(Vector3 v) |
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| 76 | { |
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| 77 | return dotProduct(this, v); |
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| 78 | } |
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| 79 | |||
| 80 | static public float dotProduct(Vector3 a, Vector3 b) |
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| 81 | { |
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| 82 | return (a.x*b.x + a.y*b.y + a.z*b.z); |
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| 83 | } |
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| 84 | |||
| 85 | public Vector3 crossProduct(Vector3 v) |
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| 86 | { |
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| 87 | return crossProduct(this, v); |
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| 88 | } |
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| 89 | |||
| 90 | static public Vector3 crossProduct(Vector3 a, Vector3 b) |
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| 91 | { |
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| 92 | return new Vector3( |
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| 93 | (a.y * b.z) - (a.z * b.y), |
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| 94 | (a.z * b.x) - (a.x * b.z), |
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| 95 | (a.x * b.y) - (a.y * b.x)); |
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| 96 | } |
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| 97 | |||
| 98 | static public float distance(Vector3 a, Vector3 b) |
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| 99 | { |
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| 100 | Vector3 c = new Vector3(b.x - a.x, b.y - a.y, b.z - a.z); |
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| 101 | return c.length(); |
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| 102 | } |
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| 103 | |||
| 104 | static public Vector3 add(Vector3 a, Vector3 b) |
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| 105 | { |
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| 106 | return new Vector3(a.x + b.x, a.y + b.y, a.z + b.z); |
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| 107 | } |
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| 108 | |||
| 109 | static public Vector3 subtract(Vector3 a, Vector3 b) |
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| 110 | { |
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| 111 | return new Vector3(a.x - b.x, a.y - b.y, a.z - b.z); |
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| 112 | } |
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| 113 | |||
| 114 | static public float length(float x, float y, float z) |
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| 115 | { |
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| 116 | return (float)Math.sqrt(x*x + y*y + z*z); |
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| 117 | } |
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| 118 | |||
| 119 | /** Return a copy of this Vector3. */ |
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| 120 | public Vector3 copy() |
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| 121 | { |
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| 122 | return new Vector3(x, y, z); |
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| 123 | } |
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| 124 | } |
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| 125 | |||
| 126 | |||
| 127 | |||
| 128 |