Vector3f.java

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package edu.tum.cs.util.math;

import javax.vecmath.Matrix4f;

public class Vector3f extends javax.vecmath.Vector3f {
        private static final long serialVersionUID = 1L;

        public Vector3f() {
                super();
        }
        
        public Vector3f(float x, float y, float z) {
                super(x,y,z);
        }
        
        public Vector3f(javax.vecmath.Vector3f v) {
                super(v);
        }
        
        public double distance(Vector3f other) {
                float xd = x-other.x;
                float yd = y-other.y;
                float zd = z-other.z;
                return Math.sqrt(xd*xd+yd*yd+zd*zd);
        }
        
        public void subtract(Vector3f other) {
                x -= other.x;
                y -= other.y;
                z -= other.z;           
        }
        
        public void rotate(double theta, Vector3f axis) {
           Vector3f p = this;
           Vector3f q = new Vector3f(0.0f,0.0f,0.0f);
           double costheta, sintheta;

           Vector3f r = new Vector3f(axis);
           r.normalize();
           
           costheta = Math.cos(theta);
           sintheta = Math.sin(theta);

           q.x += (costheta + (1 - costheta) * r.x * r.x) * p.x;
           q.x += ((1 - costheta) * r.x * r.y - r.z * sintheta) * p.y;
           q.x += ((1 - costheta) * r.x * r.z + r.y * sintheta) * p.z;

           q.y += ((1 - costheta) * r.x * r.y + r.z * sintheta) * p.x;
           q.y += (costheta + (1 - costheta) * r.y * r.y) * p.y;
           q.y += ((1 - costheta) * r.y * r.z - r.x * sintheta) * p.z;

           q.z += ((1 - costheta) * r.x * r.z - r.y * sintheta) * p.x;
           q.z += ((1 - costheta) * r.y * r.z + r.x * sintheta) * p.y;
           q.z += (costheta + (1 - costheta) * r.z * r.z) * p.z;

           this.x = q.x;
           this.y = q.y;
           this.z = q.z;
        }
        
        public static Matrix4f getRotationMatrix(double theta, Vector3f axis) {
                Matrix4f ret = new Matrix4f();
                float costheta, sintheta;
                
                Vector3f r = new Vector3f(axis);
                r.normalize();

                costheta = (float)Math.cos(theta);
                sintheta = (float)Math.sin(theta);

                ret.m00 = (costheta + (1 - costheta) * r.x * r.x);
                ret.m10 = ((1 - costheta) * r.x * r.y - r.z * sintheta);
                ret.m20 = ((1 - costheta) * r.x * r.z + r.y * sintheta);
                ret.m30 = 0;

                ret.m01 = ((1 - costheta) * r.x * r.y + r.z * sintheta);
                ret.m11 = (costheta + (1 - costheta) * r.y * r.y);
                ret.m21 = ((1 - costheta) * r.y * r.z - r.x * sintheta);
                ret.m31 = 0;

                ret.m02 = ((1 - costheta) * r.x * r.z - r.y * sintheta);
                ret.m12 = ((1 - costheta) * r.y * r.z + r.x * sintheta);
                ret.m22 = (costheta + (1 - costheta) * r.z * r.z);
                ret.m32 = 0;
                
                ret.m03 = 0;
                ret.m13 = 0;
                ret.m23 = 0;
                ret.m33 = 1;

                return ret;
        }
}

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mod_vis
Author(s): Moritz Tenorth, Jakob Engel
autogenerated on Fri Jan 11 09:54:14 2013