/***************************************************************************************
*****                        INTERFACE IMRTPRIMITIVE                               *****
****************************************************************************************
** Author: Peter Stuart
** Date:   8/1/98
** Description: This is used to interface with a primitive. Primitives are the basic
**   objects which can be used together to build complex objects. Some examples of 
**   simple primitives include sphere, plane, or torus. Examples of more complex
**   primitives are patches, NURBS, CSG objects. Once this interface is complete, 
**   all of these will be able to be represented.
**
** Interface Functions:
**
** Intersection  - Checks to see if a particular ray intersects the primitive
** GetHitDetails - If an intersection occurs, this function is called. It fills
**                 in a structure called ShaderInfo with information about the point
**                 of intersection. This includes the surface normal at that point
**                 and the U-V coordinates at that point.
** GetPolygons   - This returns a polygonal representation of the primitive based on
**                 the "fidelity" or complexity of the mesh.
** GetFrame      - This returns the primitives coordinate frame.
** GetTransform  - This returns a matrix which transforms a point from the cartesian
**                 frame into the coordinate frame used by the primitive.
***************************************************************************************/



#include <iostream.h>
#include <objbase.h>

#include "IMRTInterface.hpp"
#include "IMRTShader.hpp"
#include "3DMath.hpp"
#include "Triangle.hpp"

#ifndef __IMRTPRIMITIVE__
#define __IMRTPRIMITIVE__

interface IMRTPrimitive : public IMRTInterface
{
   virtual HRESULT pascal Intersection (const Vector&, const Point&, Point*) = 0;
   virtual HRESULT pascal GetHitDetails (ShaderInfo*) = 0;
   virtual HRESULT pascal GetPolygons (const UINT&, const UINT&, TriangleList*) = 0;
   virtual HRESULT pascal GetFrame (Frame**) = 0;
   virtual HRESULT pascal GetTransform (Matrix4D*) = 0;
};

#endif