public void Check_StopsObject_EvenIfItIsMovingLessThanOnePixel()
{
var map = CollisionMap.Empty;
map.TileSize = 16;
map.MapData.Width = 4;
// create a fake map
// 0, 0, 0, 0,
// 0, -1, -1, 0,
// 0, -1, -1, 0,
// 0, 0, 0, 0
map.MapData[ 0 ] = 0; map.MapData[ 1 ] = 0; map.MapData[ 2 ] = 0; map.MapData[ 3 ] = 0;
map.MapData[ 4 ] = 0; map.MapData[ 5 ] = -1; map.MapData[ 6 ] = -1; map.MapData[ 7 ] = 0;
map.MapData[ 8 ] = 0; map.MapData[ 9 ] = -1; map.MapData[ 10 ] = -1; map.MapData[ 11 ] = 0;
map.MapData[ 12 ] = 0; map.MapData[ 13 ] = 0; map.MapData[ 14 ] = 0; map.MapData[ 15 ] = 0;
var detector = new CollisionDetector( map );
// now, simulate a collision where the entity wants to travel 0.32000000023f on X and 4.8f on Y
var result = detector.Check( new Vector2( 16, 16 ), new Vector2( -0.3200000023f, 4.8f ), new Vector2( 64, 64 ) );
// X position should be pushed back (entity was in a bad spot before)
Assert.Equal( 16f, result.Position.X );
// Y should increase as expected
Assert.Equal( 20.8f, result.Position.Y );
}
public void Check_DecrementsYaxis_IfNoCollisions()
{
var detector = new CollisionDetector( CollisionMap.Empty );
var result = detector.Check( _startPosition, new Vector2( 0, -2 ), _size );
Assert.Equal( 100f, result.Position.X );
Assert.Equal( 98f, result.Position.Y );
}
public void Check_IncrementsYaxis_IfNoCollisions()
{
var detector = new CollisionDetector( CollisionMap.Empty );
var result = detector.Check( _startPosition, _smallVelocity, _size );
Assert.Equal( 105f, result.Position.X );
Assert.Equal( 105f, result.Position.Y );
}
public void Check_StopsObject_AtCollisionPoint()
{
// fake a collision along our path
var map = CollisionMap.Empty;
map.TileSize = 16;
map.MapData[ 1 ] = 1;
var detector = new CollisionDetector( map );
var result = detector.Check( Vector2.Zero, new Vector2( 32, 0 ), new Vector2( 8, 8 ) );
Assert.Equal( 8, result.Position.X );
Assert.Equal( 0, result.Position.Y );
}
public CollisionService(CollisionMap map = null)
{
_map = map ?? CollisionMap.Empty;
_detector = new CollisionDetector(_map);
}
public void Test_Collision_Edge_Cases()
{
//{X:0 Y:78.4279}
//{X:-20 Y:88.2359}
//False
//{X:-0.32 Y:1.411775}
//{X:64 Y:252.6814}
var map = CollisionMap.Empty;
map.TileSize = 16;
map.MapData.Width = 4;
// create a fake map
// 0, 0, 0, 0,
// 0, -1, -1, 0,
// 0, -1, -1, 0,
// 0, 0, 0, 0
map.MapData[ 0 ] = 0; map.MapData[ 1 ] = 0; map.MapData[ 2 ] = 0; map.MapData[ 3 ] = 0;
map.MapData[ 4 ] = 0; map.MapData[ 5 ] = -1; map.MapData[ 6 ] = -1; map.MapData[ 7 ] = 0;
map.MapData[ 8 ] = 0; map.MapData[ 9 ] = -1; map.MapData[ 10 ] = -1; map.MapData[ 11 ] = 0;
map.MapData[ 12 ] = 0; map.MapData[ 13 ] = -1; map.MapData[ 14 ] = -1; map.MapData[ 15 ] = 0;
map.MapData[ 16 ] = 0; map.MapData[ 17 ] = -1; map.MapData[ 18 ] = -1; map.MapData[ 19 ] = 0;
map.MapData[ 20 ] = 0; map.MapData[ 21 ] = -1; map.MapData[ 22 ] = -1; map.MapData[ 23 ] = 0;
map.MapData[ 24 ] = 0; map.MapData[ 25 ] = -1; map.MapData[ 26 ] = -1; map.MapData[ 27 ] = 0;
map.MapData[ 28 ] = 0; map.MapData[ 29 ] = -1; map.MapData[ 30 ] = -1; map.MapData[ 31 ] = 0;
map.MapData[ 32 ] = 0; map.MapData[ 33 ] = 0; map.MapData[ 34 ] = 0; map.MapData[ 35 ] = 0;
var detector = new CollisionDetector( map );
// now, simulate a collision where the entity wants to travel 0.32000000023f on X and 4.8f on Y
var result = detector.Check( new Vector2( 16, 16 ), new Vector2( -0.3200000023f, 1.411775f ), new Vector2( 16, 16 ) );
result.XAxis.ShouldBeTrue("No XAxis Collision Reported");
result.Position.X.ShouldEqual( 16f ); // no movement on X
}
public CollisionService( CollisionMap map = null )
{
_map = map ?? CollisionMap.Empty;
_detector = new CollisionDetector( _map );
}