InstanceNode.h

///////////////////////////////////////////////////////////////////////////////////////////////////
//
// InstanceNode.h
//
// Implementation of instance node - a single node in scene representing an object instance
//
///////////////////////////////////////////////////////////////////////////////////////////////////

#ifndef __RAYTRACER__INSTANCE_NODE__H__
#define __RAYTRACER__INSTANCE_NODE__H__

///////////////////////////////////////////////////////////////////////////////////////////////////
// Header section

#include "Core/Memory/Memory.h"
#include "Core/Math/Numeric/Mat4.h"

///////////////////////////////////////////////////////////////////////////////////////////////////
// Class & Structures definition

namespace Raytracer
{
    /// <summary>
    /// Single instance node in scene
    ///
    /// This instance node structure holds instance information for either software/compute ray
    /// tracing implementations or hardware ray tracing implementations. Theoretically it can hold
    /// both to allow for ray tracing on either device.
    /// </summary>
    class ALIGN(16) InstanceNode
    {
    public:
        /// <summary>
        /// Transformation matrix for this instance
        /// </summary>
        Engine::mat4 mTransform;

        /// <summary>
        /// Inverse of transformation matrix for this instance
        /// </summary>
        Engine::mat4 mTransformInverse;

        /// <summary>
        /// Index to geometry node in scene for Software and Compute ray tracing implementation
        /// </summary>
        unsigned int mGeometryNode;

        /// <summary>
        /// Padding to ensure 16-byte alignment
        /// </summary>
        unsigned int mPad0;

        /// <summary>
        /// Pointer to acceleration structure for Hardware ray tracing implementation
        /// </summary>
        void* mAccelerationStructure;

        ALIGNED_NEW_DELETE("Raytracer::InstanceNode")
    };
}

///////////////////////////////////////////////////////////////////////////////////////////////////
// EOH

#endif