Package ca.eandb.jmist.math

Examples of ca.eandb.jmist.math.Vector3.x()

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          width * (p.x() - 0.5),
          height * (0.5 - p.y()),
          -1.0);
      Ray3 ray = new Ray3(Point3.ORIGIN, v.unit());
      Color color = getWhite();
      double z = v.x() * v.x() + v.y() * v.y() + 1.0;
      double pdf = z * z / (width * height);
      return ScatteredRay.diffuse(ray, color, pdf);
    }

    /* (non-Javadoc)
 
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      Vector3 v = ray.direction();
      if (-v.z() < MathUtil.EPSILON) {
        return null;
      }
      Point2 p = new Point2(
          0.5 - v.x() / (width * v.z()),
          0.5 + v.y() / (height * v.z()));
      return Box2.UNIT.contains(p) ? p : null;
    }

    /* (non-Javadoc)
 
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    double wavelength = lambda.getWavelength();
    double value;
    if (wavelength < 400e-9) {
      value = 0.0;
    } else if (wavelength < 500e-9) {
      value = Math.max(0.0, band.x());
    } else if (wavelength < 600e-9) {
      value = Math.max(0.0, band.y());
    } else if (wavelength < 700e-9) {
      value = Math.max(0.0, band.z());
    } else { // wavelength >= 700e-9
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   */
  @Override
  public Color shade(ShadingContext sc) {
    Vector3 n = sc.getShadingNormal();

    double r = Math.abs(n.x());
    double g = Math.abs(n.y());
    double b = Math.abs(n.z());

    double c = Math.max(r, Math.max(g, b));

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    Vector3 dir = ray.direction();

    double x0 = org.x() / radius;
    double y0 = org.y() / height - 1.0;
    double z0 = org.z() / radius;
    double x1 = dir.x() / radius;
    double y1 = dir.y() / height;
    double z1 = dir.z() / radius;

    Polynomial f = new Polynomial(
        x0 * x0 - y0 * y0 + z0 * z0,
 
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     * @see ca.eandb.jmist.framework.path.EyeNode#project(ca.eandb.jmist.math.HPoint3)
     */
    public Point2 project(HPoint3 x) {
      Ray3 ray = new Ray3(Point3.ORIGIN, x);
      Vector3 v = ray.direction();
      double theta = Math.atan2(v.x(), -v.z());
      if (Math.abs(theta) > 0.5 * hfov) {
        return null;
      }
      double h = v.y() / Math.hypot(v.x(), v.z());
      if (Math.abs(h) > 0.5 * height) {
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      Vector3 v = ray.direction();
      double theta = Math.atan2(v.x(), -v.z());
      if (Math.abs(theta) > 0.5 * hfov) {
        return null;
      }
      double h = v.y() / Math.hypot(v.x(), v.z());
      if (Math.abs(h) > 0.5 * height) {
        return null;
      }
      return new Point2(
          0.5 + theta / hfov,
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      if (-v.z() / d < MathUtil.EPSILON) {
        return null;
      }
      return new Point2(
          (v.x() / d + 1.0) / 2.0,
          (1.0 - v.y() / d) / 2.0);
    }

    /* (non-Javadoc)
     * @see ca.eandb.jmist.framework.path.PathNode#getCosine(ca.eandb.jmist.math.Vector3)
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  }

  public static CIEXYZ convertRGB2XYZ(double r, double g, double b) {
    Vector3 rgb = new Vector3(linearize(r), linearize(g), linearize(b));
    Vector3 xyz = sRGBLin_TO_XYZ.times(rgb);
    return new CIEXYZ(xyz.x(), xyz.y(), xyz.z());
  }

  public static CIEXYZ convertRGB2XYZ(RGB rgb) {
    return convertRGB2XYZ(rgb.r(), rgb.g(), rgb.b());
  }
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  public static RGB convertXYZ2RGB(double x, double y, double z) {
    Vector3 xyz = new Vector3(x, y, z);
    Vector3 rgb = XYZ_TO_sRGBLin.times(xyz);
    return new RGB(
        delinearize(rgb.x()),
        delinearize(rgb.y()),
        delinearize(rgb.z()));
  }

  public static RGB convertXYZ2RGB(CIEXYZ xyz) {
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