/*
 * Copyright 2009, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

namespace o3d {

typedef Shape[] ShapeArray;

%[
  The Transform defines parent child relationship and a localMatrix..
  A Transform can have one or no parents and
  an arbitrary number of children.

  @o3dparameter localMatrix ParamMatrix4 The local matrix for this transform.
  @o3dparameter worldMatrix ParamMatrix4 The world matrix of this transform.
  @o3dparameter visible ParamBoolean Whether or not this transform and all its
      children are visible.
  @o3dparameter boundingBox ParamBoundingBox The bounding box for this transform
      and all its children.
  @o3dparameter cull ParamBoolean Whether or not to attempt to cull this
     transform and all its children based on whether or not its bounding box
     is in the view frustum.
 %]
[nocpp, include="core/cross/transform.h"] class Transform
   : ParamObject {
  %[
    The Visibility for this transform.
  %]
  [getter, setter] bool visible_;

  %[
    Sets the parent of the transform by re-parenting the transform under
    parent. Setting parent to null removes the transform and the
    entire subtree below it from the transform graph.
    If the operation would create a cycle it fails.
  %]
  [setter, userglue_setter] Transform? parent_;

  %[
    The immediate children of this Transform.

    Each access to this field gets the entire list, so it is best to get it
    just once. For example:
    \code
    var children = transform.children;
    for (var i = 0; i < children.length; i++) {
      var child = children[i];
    }
    \endcode

    Note that modifications to this array [e.g. additions to it] will not affect
    the underlying Transform, while modifications to the members of the array
    <strong>will</strong> affect them.
  %]
  [userglue_getter, getter] TransformArray children_;

  %[
    Returns all the transforms under this transform including this one.

    Note that modifications to this array [e.g. additions to it] will not affect
    the underlying Transform, while modifications to the members of the array
    <strong>will</strong> affect them.

    \return An array containing the transforms of the subtree.
  %]
  TransformArray GetTransformsInTree();

  %[
    Searches for transforms that match the given name in the hierarchy under and
    including this transform. Since there can be more than one transform with a
    given name, results are returned in an array.

    Note that modifications to this array [e.g. additions to it] will not affect
    the underlying Transform, while modifications to the members of the array
    <strong>will</strong> affect them.

    \param name Transform name to look for.
    \return An array containing the transforms of the under and including this
        transform matching the given name.
  %]
  TransformArray GetTransformsByNameInTree(String name);

  %[
    Evaluates and returns the current world matrix.

    \return The updated world matrix.
  %]
  Vectormath::Aos::Matrix4 GetUpdatedWorldMatrix();

  %[
    Adds a shape do this transform.
    \param shape Shape to add.
  %]
  void AddShape(Shape shape);

  %[
    Removes a shape from this transform.
    \param shape Shape to remove.
    \return true if successful, false if shape was not in this transform.
  %]
  bool RemoveShape(Shape shape);

  %[
    Gets the shapes owned by this transform.

    Each access to this field gets the entire list so it is best to get it
    just once. For example:
    \code
    var shapes = transform.shapes;
    for (var i = 0; i < shapes.length; i++) {
      var shape = shapes[i];
    }
    \endcode

    Note that modifications to this array [e.g. additions to it] will not affect
    the underlying Transform, while modifications to the members of the array
    <strong>will</strong> affect them.
  %]
  [userglue_getter, getter, userglue_setter, setter]
  ShapeArray shapes_;

  %[
    Walks the tree of transforms starting with this transform and creates
    draw elements. If an Element already has a DrawElement that uses material a
    new DrawElement will not be created.
    \param pack Pack used to manage created elements.
    \param material Material to use for each element. If you pass null, it will
         use the material on the element to which a draw element is being added.
         In other words, a DrawElement will use the material of the
         corresponding Element if material is null. This allows you to easily
         setup the default (just draw as is) by passing null or setup a shadow
         pass by passing in a shadow material.
  %]
  void CreateDrawElements(Pack pack,
                          Material? material);

  %[
    World (model) matrix as it was last computed.
  %]
  [getter] Vectormath::Aos::Matrix4 world_matrix;

  %[
    Local transformation matrix.
  %]
  [getter, setter, nocpp] Vectormath::Aos::Matrix4 local_matrix;

  %[
    The cull setting for this transform. If true this Transform will be culled
    by having its bounding box compared to the view frustum of any draw context
    it is used with.
  %]
  [getter, setter] bool cull_;

  %[
    The BoundingBox for this Transform. If culling is on this bounding box will
    be tested against the view frustum of any draw context used to with this
    Transform.
  %]
  [getter, setter] BoundingBox bounding_box_;

  %[
    Sets the local matrix of this transform to the identity matrix.
  %]
  [userglue] void identity();

  %[
    Pre-composes the local matrix of this Transform with a translation.  For
    example, if the local matrix is a rotation then new local matrix will
    translate by the given vector and then rotated.

    \param translation vector of 3 entries by which to translate.
  %]
  [userglue] void translate(Vectormath::Aos::Vector3 translation);

  %[
    Pre-composes the local matrix of this Transform with a translation.  For
    example, if the local matrix is a rotation then the new local matrix will
    translate by the given amounts and then rotate.

    \param x amount to translate in x.
    \param y amount to translate in y.
    \param z amount to translate in z.
  %]
  [userglue] void translate(float x, float y, float z);

  %[
    Pre-composes the local matrix of this Transform with a rotation about the
    x-axis.  For example, if the local matrix is a tranlsation, the new local
    matrix will rotate around the x-axis and then translate.

    \param radians The number of radians to rotate around x-axis.
  %]
  [userglue] void rotateX(float radians);

  %[
    Pre-composes the local matrix of this Transform with a rotation about the
    y-axis.  For example, if the local matrix is a translation, the new local
    matrix will rotate around the y-axis and then translate.

    \param radians The number of radians to rotate around y-axis.
  %]
  [userglue] void rotateY(float radians);

  %[
    Pre-composes the local matrix of this Transform with a rotation about the
    z-axis.  For example, if the local matrix is a translation, the new local
    matrix will rotate around the z-axis and then translate.

    \param radians The number of radians to rotate around z-axis.
  %]
  [userglue] void rotateZ(float radians);

  %[
    Pre-composes the local matrix of this Transform with a rotation.
    Interprets the three entries of the given vector as angles by which to
    rotate around the x, y and z axes.  Rotates around the x-axis first,
    then the y-axis, then the z-axis.

    \param radiansXYZ A vector of angles (in radians) by which to rotate
        around the x, y and z axes.
  %]
  [userglue] void rotateZYX(Vectormath::Aos::Vector3 radiansXYZ);

  %[
    Pre-composes the local matrix of this Transform with a rotation around the
    given axis.  For example, if the local matrix is a translation, the new
    local matrix will rotate around the given axis and then translate.

    \param radians The number of radians to rotate.
    \param axis a non-zero vector representing the axis around which to rotate.
  %]
  [userglue] void axisRotate(Vectormath::Aos::Vector3 axis, float radians);

  %[
    Pre-composes the local matrix of this Transform with a rotation defined by
    the given quaternion.

    \param unit_quat A non-zero quaternion to be interpreted as a rotation.
  %]
  [userglue] void quaternionRotate(Vectormath::Aos::Quat unit_quat);

  %[
    Pre-composes the local matrix of this transform by a scaling transformation.
    For example, if the local matrix is a rotation, the new local matrix will
    scale and then rotate.

    \param scale amount to scale.
  %]
  [userglue] void scale(Vectormath::Aos::Vector3 scale);

  %[
    Pre-composes the local matrix of this transform by a scaling transformation.
    For example, if the local matrix is a rotation, the new local matrix will
    scale and then rotate.

    \param x amount to scale in the x dimension.
    \param y amount to scale in the y dimension.
    \param z amount to scale in the z dimension.
  %]
  [userglue] void scale(float x, float y, float z);

  [verbatim=cpp_glue] %{
    void userglue_setter_parent_(
        o3d::Transform* _this,
        o3d::Transform* parent) {
      _this->SetParent(parent);
    }
    o3d::TransformArray userglue_getter_children_(
      o3d::Transform *self) {
      return self->GetChildren();
    }
    o3d::ShapeArray userglue_getter_shapes_(
      o3d::Transform *self) {
      return self->GetShapes();
    }
    void userglue_setter_shapes_(
      o3d::Transform *self,
      const o3d::ShapeArray& shapes) {
      self->SetShapes(shapes);
    }
    void userglue_method_identity(o3d::Transform* self) {
      self->set_local_matrix(Vectormath::Aos::Matrix4::identity());
    }
    void userglue_method_translate(
        o3d::Transform* self,
        const Vectormath::Aos::Vector3& translation) {
      self->set_local_matrix(
          self->local_matrix() *
          Vectormath::Aos::Matrix4::translation(translation));
    }
    void userglue_method_translate(o3d::Transform* self,
                                   float x,
                                   float y,
                                   float z) {
      self->set_local_matrix(self->local_matrix() *
                              Vectormath::Aos::Matrix4::translation(
                                 Vectormath::Aos::Vector3(x, y, z)));
    }
    void userglue_method_rotateX(o3d::Transform* self,
                                 float radians) {
      self->set_local_matrix(self->local_matrix() *
                              Vectormath::Aos::Matrix4::rotationX(radians));
    }
    void userglue_method_rotateY(o3d::Transform* self,
                                 float radians) {
      self->set_local_matrix(self->local_matrix() *
                              Vectormath::Aos::Matrix4::rotationY(radians));
    }
    void userglue_method_rotateZ(o3d::Transform* self,
                                 float radians) {
      self->set_local_matrix(self->local_matrix() *
                              Vectormath::Aos::Matrix4::rotationZ(radians));
    }
    void userglue_method_rotateZYX(o3d::Transform* self,
        const Vectormath::Aos::Vector3& radiansXYZ) {
      self->set_local_matrix(self->local_matrix() *
          Vectormath::Aos::Matrix4::rotationZYX(radiansXYZ));
    }
    void userglue_method_axisRotate(o3d::Transform* self,
                                    const Vectormath::Aos::Vector3& axis,
                                    float radians) {
      self->set_local_matrix(
          self->local_matrix() *
              Vectormath::Aos::Matrix4::rotation(radians,
                  Vectormath::Aos::normalize(axis)));
    }
    void userglue_method_quaternionRotate(o3d::Transform* self,
                                          const Vectormath::Aos::Quat& quat) {
      self->set_local_matrix(self->local_matrix() *
                              Vectormath::Aos::Matrix4::rotation(
                                  Vectormath::Aos::normalize(quat)));
    }
    void userglue_method_scale(
        o3d::Transform* self,
        const Vectormath::Aos::Vector3& scale) {
      self->set_local_matrix(self->local_matrix() *
          Vectormath::Aos::Matrix4::scale(scale));
    }
    void userglue_method_scale(o3d::Transform* self,
                               float x,
                               float y,
                               float z) {
      self->set_local_matrix(
          self->local_matrix() *
          Vectormath::Aos::Matrix4::scale(Vectormath::Aos::Vector3(x, y, z)));
    }
  %}
};  // Transform

%[
  TransformArray is a typdef for an array of Transforms.
%]
typedef Transform[] TransformArray;

}  // namespace o3d