Android Open Source - jmini3d Camera

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Back to project page jmini3d.

License

The source code is released under:

Copyright 2012 Mobialia http://www.mobialia.com/ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to ...

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Java Source Code

package jmini3d;
//from  www .  j  av  a 2 s  .  co  m
public class Camera {
  public Vector3 position = new Vector3();
  public Vector3 target = new Vector3();
  public Vector3 upAxis = new Vector3();

  private Vector3 vx = new Vector3();
  private Vector3 vy = new Vector3();
  private Vector3 vz = new Vector3();

  private float fovy = 45;
  private int width = 0;
  private int height = 0;
  private float near = 1;
  private float far = 1000;

  public float[] perspectiveMatrix = new float[16];
  private float[] modelViewMatrix = new float[16];

  private boolean needsMatrixUpdate = true;

  public Camera() {
    setTarget(0, 0, 0);
    setUpAxis(0, 0, 1);
  }

  public void setPosition(float x, float y, float z) {
    if (this.position.x != x || this.position.y != y || this.position.z != z) {
      position.setAll(x, y, z);
      needsMatrixUpdate = true;
    }
  }

  public void setTarget(float x, float y, float z) {
    if (this.target.x != x || this.target.y != y || this.target.z != z) {
      target.setAll(x, y, z);
      needsMatrixUpdate = true;
    }
  }

  public void setUpAxis(float x, float y, float z) {
    if (this.upAxis.x != x || this.upAxis.y != y || this.upAxis.z != z) {
      upAxis.setAll(x, y, z);
      needsMatrixUpdate = true;
    }
  }

  public void setFovy(float fovy) {
    if (this.fovy != fovy) {
      this.fovy = fovy;
      needsMatrixUpdate = true;
    }
  }

  public void setNear(float near) {
    if (this.near != near) {
      this.near = near;
      needsMatrixUpdate = true;
    }
  }

  public void setFar(float far) {
    if (this.far != far) {
      this.far = far;
      needsMatrixUpdate = true;
    }
  }

  public void setWidth(int width) {
    if (this.width != width) {
      this.width = width;
      needsMatrixUpdate = true;
    }
  }

  public void setHeight(int height) {
    if (this.height != height) {
      this.height = height;
      needsMatrixUpdate = true;
    }
  }

  public Vector3 getPosition() {
    return position;
  }

  public Vector3 getTarget() {
    return target;
  }

  public Vector3 getUpAxis() {
    return upAxis;
  }

  public float getFovy() {
    return fovy;
  }

  public float getFovx() {
    return (float) (360 / Utils.PI * Math.atan(Math.tan(fovy * Utils.PI / 360) * width / height));
  }

  public float getNear() {
    return near;
  }

  public float getFar() {
    return far;
  }

  public int getWidth() {
    return width;
  }

  public int getHeight() {
    return height;
  }

  public boolean updateMatrices() {
    if (needsMatrixUpdate) {
      MatrixUtils.perspective(perspectiveMatrix, fovy, ((float) width) / height, near, far);
      MatrixUtils.lookAt(modelViewMatrix, position, target, upAxis, vx, vy, vz);
      MatrixUtils.multiply(perspectiveMatrix, modelViewMatrix, perspectiveMatrix);

      needsMatrixUpdate = false;
      return true;
    }
    return false;
  }
}

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