/***********************************************************
             CSC418, SPRING 2005
 
                 scene_object.h
                 author: Jack Wang

		classes defining primitives in the scene

***********************************************************/

#include "util.h"

// All primitives should provide a intersection function.  
// To create more primitives, inherit from SceneObject.
// Namely, you can create, Sphere, Cylinder, etc... classes
// here.
class SceneObject {
public:
	// Returns true if an intersection occured, false otherwise.
	virtual bool intersect( Ray3D&, Matrix4x4, Matrix4x4 ) = 0;
};

// Example primitive you can create, this is a unit square on 
// the xy-plane.
class UnitSquare : public SceneObject {
public:
	bool intersect( Ray3D& ray, Matrix4x4 worldToModel,
			Matrix4x4 modelToWorld );
};