Examples of ca.eandb.jmist.framework.Material.scatter()

ca.eandb.jmist.framework.Material.scatter()

Scatters a ray incident on this material. @param x The SurfacePoint that the ray is incident upon. @param v The Vector3 indicating the direction of travel ofthe incident ray (note that the Vector3 points toward the surface). @param adjoint A value indicating whether the path being simulated is inthe reverse direction from the direction in which light is traveling (i.e., true for path tracing from the eye, false for light tracing). @param lambda The WavelengthPacket associated with thelight traveling along this path. @param ru The first random variable (must be in [0, 1]). @param rv The second random variable (must be in [0, 1]). @param rj The third random variable (must be in [0, 1]). @return The ScatteredRay, or null to indicatethat the ray was absorbed.

  public ScatteredRay sample(double ru, double rv, double rj) {
    PathInfo path = getPathInfo();
    WavelengthPacket lambda = path.getWavelengthPacket();
    Vector3 v = PathUtil.getDirection(getParent(), this);
    Material material = surf.getMaterial();
    return material.scatter(surf, v, isOnEyePath(), lambda, ru, rv, rj);
  }


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

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    Color col = lambda.getColorModel().getWhite(lambda);


    do  {


      Material layer = layers.get(depth);
      sr = layer.scatter(x, v, adjoint, lambda, rnd.next(), rnd.next(), rnd.next());


      if (sr == null) return null;
      v = sr.getRay().direction();


      dir = (v.dot(N) > 0.0) ? -1 : 1;

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