Android Open Source - aCARdeRUN Vector4

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License

The source code is released under:

Apache License

Java Source Code

/* Copyright 2012 Dennis Grewe
 */* www .  jav a 2s. co  m*/
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. */
package de.hdm.mib.dg041.math;

/**
 * @author dennis.grewe [dg041@hdm-stuttgart.de]
 * Created on 23.02.2012.
 */
public class Vector4
{
    // --------------------------------------------------------
    // PROPERTIES
    // --------------------------------------------------------

    public float[] v = new float[4];

    // --------------------------------------------------------
    // CONSTRUCTOR
    // --------------------------------------------------------

    public Vector4()
    {
        v[0] = 0.0f;
        v[1] = 0.0f;
        v[2] = 0.0f;
        v[3] = 0.0f;
    }

    public Vector4(Vector3 v3, float w)
    {
        v[0] = v3.v[0];
        v[1] = v3.v[1];
        v[2] = v3.v[2];
        v[3] = w;
    }

    public Vector4(Vector2 v2, float z, float w)
    {
        v[0] = v2.v[0];
        v[1] = v2.v[1];
        v[2] = z;
        v[3] = w;
    }

    public Vector4(float x, float y, float z, float w)
    {
        v[0] = x;
        v[1] = y;
        v[2] = z;
        v[3] = w;
    }

    // --------------------------------------------------------
    // METHODS
    // --------------------------------------------------------

    public static float dot(Vector4 v1, Vector4 v2)
    {
      return v1.v[0] * v2.v[0] + v1.v[1] * v2.v[1] + v1.v[2] * v2.v[2] + v1.v[3] * v2.v[3];
    }

    public float get(int index)
    {
      return v[index];
    }

    public float getX()
    {
      return v[0];
    }

    public float getY()
    {
      return v[1];
    }

    public float getZ()
    {
      return v[2];
    }

    public float getW()
    {
      return v[3];
    }

    public float getLength()
    {
        return (float) Math.sqrt(
            v[0] * v[0] +
            v[1] * v[1] +
            v[2] * v[2] +
            v[3] * v[3]);
    }
  
    public float getLengthSqr()
    {
        return (v[0] * v[0] +
                v[1] * v[1] +
                v[2] * v[2] +
                v[3] * v[3]);
    }

    public Vector4 normalize()
    {
        float l = getLength();
        for (int i = 0; i < 4; ++i)
        {
            v[i] /= l;
        }
        return this;
    }

    public static Vector4 normalize(Vector4 v)
    {
        Vector4 result = new Vector4();
        float l = v.getLength();
        for (int i = 0; i < 4; ++i)
        {
            result.v[i] /= l;
        }
        return result;
    }

    public static Vector4 add(Vector4 v1, Vector4 v2)
    {
      return new Vector4(v1.v[0] + v2.v[0], v1.v[1] + v2.v[1], v1.v[2] + v2.v[2], v1.v[3] + v2.v[3]);
    }

    public static Vector4 divide(Vector4 v, float s)
    {
      return new Vector4(v.v[0] / s, v.v[1] / s, v.v[2] / s, v.v[3] / s);
    }

    public static Vector4 multiply(Vector4 v, float s)
    {
      return new Vector4(v.v[0] * s, v.v[1] * s, v.v[2] * s, v.v[3] * s);
    }

    public static Vector4 multiply(float s, Vector4 v)
    {
      return new Vector4(s * v.v[0], s * v.v[1], s * v.v[2], s * v.v[3]);
    }

    public static Vector4 subtract(Vector4 v1, Vector4 v2)
    {
      return new Vector4(v1.v[0] - v2.v[0], v1.v[1] - v2.v[1], v1.v[2] - v2.v[2], v1.v[3] - v2.v[3]);
    }

    public void set(int index, float value)
    {
      v[index] = value;
    }

    public void setX(float x)
    {
      v[0] = x;
    }

    public void setY(float y)
    {
      v[1] = y;
    }

    public void setZ(float z)
    {
      v[2] = z;
    }

    public void setW(float w)
    {
      v[3] = w;
    }
}

Java Source Code List

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