GLESAbsoluteTransform.h

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/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
 
#ifndef META_OCEAN_RENDERING_GLES_ABSOLUTE_TRANSFORM_H
#define META_OCEAN_RENDERING_GLES_ABSOLUTE_TRANSFORM_H
 
#include "ocean/rendering/glescenegraph/GLESceneGraph.h"
#include "ocean/rendering/glescenegraph/GLESGroup.h"
 
#include "ocean/rendering/AbsoluteTransform.h"
 
namespace Ocean
{
 
namespace Rendering
{
 
namespace GLESceneGraph
{
 
/**
 * This class implements a GLESceneGraph absolute transform node.
 * @ingroup renderinggles
 */
class OCEAN_RENDERING_GLES_EXPORT GLESAbsoluteTransform :
    virtual public GLESGroup,
    virtual public AbsoluteTransform
{
    friend class GLESFactory;
 
    public:
 
        /**
         * Returns the current transfomation type.
         * @see AbsoluteTransform::transformationType().
         */
        TransformationType transformationType() const override;
 
        /**
         * Returns the relative screen position of the head-up node.
         * @see AbsoluteTransformation::headUpRelativePosition().
         */
        Vector2 headUpRelativePosition() const override;
 
        /**
         * Returns the transformation which is applied on top of the absolute transformation.
         * @see AbsoluteTransformation::transformation().
         */
        HomogenousMatrix4 transformation() const override;
 
        /**
         * Sets or changes the transfomation type.
         * @see AbsoluteTransform::setTransformationType().
         */
        bool setTransformationType(const TransformationType type) override;
 
        /**
         * Sets the relative screen position of the head-up node.
         * @see AbsoluteTransform::setHeadUpRelativePosition().
         */
        bool setHeadUpRelativePosition(const Vector2& position) override;
 
        /**
         * Sets an additional transformation which is applied on top of the absolute transformation.
         * @see AbsoluteTransform::setTransformation().
         */
        void setTransformation(const HomogenousMatrix4& absolute_T_children) override;
 
        /**
         * Adds this node and all child node to a traverser.
         * @see GLESNode::addToTraverser().
         */
        void addToTraverser(const GLESFramebuffer& framebuffer, const SquareMatrix4& projectionMatrix, const HomogenousMatrix4& camera_T_parent, const Lights& lights, GLESTraverser& traverser) const override;
 
    protected:
 
        /**
         * Creates a new GLESceneGraph absolute transform node.
         */
        GLESAbsoluteTransform();
 
        /**
         * Destructs a GLESceneGraph absolute transform node.
         */
        ~GLESAbsoluteTransform() override;
 
    protected:
 
        /// The transformation type to be used.
        TransformationType transformationType_ = TT_NONE;
 
        /// The relative screen position, for headup transformations.
        Vector2 headUpPosition_ = Vector2(Scalar(0.5), Scalar(0.5));
 
        /// The transformation between all children and the absolute transformation.
        HomogenousMatrix4 absolute_T_children_ = HomogenousMatrix4(true);
};
 
}
 
}
 
}
 
#endif // META_OCEAN_RENDERING_GLES_ABSOLUTE_TRANSFORM_H