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#include <math.h>
#include "extensionmanager.h"
#include "textureextension.h"

class CproceduralChecker : public CtextureExtension
{
 	DECLARE_EXTENSION_METHODS( "Checker", CproceduralChecker, 1 )
 	unsigned int uRepeat, vRepeat;
public:
 	CproceduralChecker()
 	{
 		getExtensionData()->createUInt( "repeatU", 10, 1, 10000 );
 		getExtensionData()->createUInt( "repeatV", 10, 1, 10000 );
 	}
 	~CproceduralChecker()
 	{
 	}
 	bool initialize()
 	{
 		getExtensionData()->getUInt( "repeatU", uRepeat );
 		getExtensionData()->getUInt( "repeatV", vRepeat );
 		return true;
 	}
 	bool getRGB( Crgb& rgb, real u, real v, const IntersectionInfo* intersectionInfo )
 	{
 		int pu = ( ( int )( uRepeat * fabs( u ) ) ) % 2;
 		int pv = ( ( int )( vRepeat * fabs( v ) ) ) % 2;
 		rgb.r *= pu ^ pv;
 		rgb.g *= pu ^ pv;
 		rgb.b *= pu ^ pv;
 		return true;
 	}
};
EXPORT_TEXTURE_EXTENSION( CproceduralChecker )