gtengine-bug.cpp

#include "stdafx.h"

#include <SimpleMath.h>
using DirectX::SimpleMath::Vector2;
#include <Mathematics/GteIntrSegment2Segment2.h>

inline gte::Vector2<float> _gte( const Vector2& dx )
{
	return gte::Vector2<float>{ dx.x, dx.y };
}

inline gte::Segment2<float> gteSegment( const Vector2& p1, const Vector2& p2 )
{
	return gte::Segment2<float>{ _gte( p1 ), _gte( p2 ) };
}

int main()
{
/*
	Segments:
	[ 1.87500000, -2.50000000 ]	DirectX::SimpleMath::Vector2
	[ 1.75000000, -2.50000000 ]	DirectX::SimpleMath::Vector2


	[ 2.50000000, -2.50000000 ]	DirectX::SimpleMath::Vector2
	[ 2.00000000, -2.50000000 ]	DirectX::SimpleMath::Vector2
*/
	auto s1 = gteSegment( { 1.87500000, -2.50000000 }, { 1.75000000, -2.50000000 } );
	auto s2 = gteSegment( { 2.50000000, -2.50000000 }, { 2.00000000, -2.50000000 } );

	using TSegment = gte::Segment2<float>;
	gte::TIQuery<float, TSegment, TSegment> query;

	const bool res = query( s1, s2 ).intersect;

	// This prints true, while even their bounding boxes do not intersect :-(
	printf( "%s\n", res ? "true" : "false" );
	return 0;
}