private void HandleCollisions(Tilemap tilemap, Entity collidable)
{
var position = collidable.Get<Position>();
var prevpos = collidable.Get<PreviousPosition>();
var direction = collidable.Get<Direction>();
var hotspots = collidable.Get<Hotspots>();
if (!prevpos)
{
for (int i = 0; i < collidable.Count(); ++i)
{
hotspots.BottomHit[i] = hotspots.TopHit[i] = hotspots.RightHit[i] = hotspots.LeftHit[i] = false;
if (direction.Y[i] >= 0)
{
hotspots.BottomHit[i] = HandlePointList(tilemap, position.X[i], ref position.Y[i], ref direction.Y[i], hotspots.Bottom[i]);
}
else
{
hotspots.TopHit[i] = HandlePointList(tilemap, position.X[i], ref position.Y[i], ref direction.Y[i], hotspots.Top[i]);
}
if (direction.X[i] >= 0)
{
hotspots.RightHit[i] = HandlePointList(tilemap, ref position.X[i], position.Y[i], ref direction.X[i], hotspots.Right[i]);
}
else if (direction.X[i] <= 0)
{
hotspots.LeftHit[i] = HandlePointList(tilemap, ref position.X[i], position.Y[i], ref direction.X[i], hotspots.Right[i]);
}
}
}
if (prevpos)
{
for (int i = 0; i < collidable.Count(); ++i)
{
hotspots.BottomHit[i] = hotspots.TopHit[i] = hotspots.RightHit[i] = hotspots.LeftHit[i] = false;
if (direction.Y[i] >= 0)
{
hotspots.BottomHit[i] = HandlePointList(tilemap, position.X[i], ref position.Y[i], ref direction.Y[i], prevpos.Y[i], hotspots.Bottom[i]);
}
else
{
hotspots.TopHit[i] = HandlePointList(tilemap, position.X[i], ref position.Y[i], ref direction.Y[i], prevpos.Y[i], hotspots.Top[i]);
}
if (direction.X[i] >= 0)
{
hotspots.RightHit[i] = HandlePointList(tilemap, ref position.X[i], position.Y[i], ref direction.X[i], prevpos.X[i], hotspots.Right[i]);
}
else if (direction.X[i] <= 0)
{
hotspots.LeftHit[i] = HandlePointList(tilemap, ref position.X[i], position.Y[i], ref direction.X[i], prevpos.X[i], hotspots.Right[i]);
}
}
}
}
private bool HandlePointList(Tilemap tilemap, ref float X, float Y, ref float V, float pX, List<Point> points)
{
foreach (var point in points)
{
int column = (point.X + (int)X) / tilemap.TileWidth;
int row = (point.Y + (int)Y) / tilemap.TileHeight;
int oldColumn = (point.X + (int)pX - 1) / tilemap.TileWidth;
if (tilemap.ColMaskMat[row][column] != 0)
{
return false;
}
if (tilemap.ColMaskMat[row][column] != 0)
{
X = column * tilemap.TileWidth - point.X;
V = 0;
return true;
}
}
return false;
}
private void RenderTilemap(Graphics g, Tilemap tilemap, Tilesheet tilesheet, Viewport viewport, Position viewpos)
{
int startColumn = (int)(viewpos.X[0] / tilemap.TileWidth);
int startRow = (int)(viewpos.Y[0] / tilemap.TileHeight);
int endColumn = (int)((viewpos.X[0] + viewport.Width) / tilemap.TileWidth) + 1;
int endRow = (int)((viewpos.Y[0] + viewport.Height) / tilemap.TileHeight) + 1;
startColumn = Math.Max(0, startColumn);
startRow = Math.Max(0, startRow);
endRow = Math.Min(tilemap.TileIdMat.Length, endRow);
endColumn = Math.Min(tilemap.TileIdMat[0].Length, endColumn);
for (int i = startRow; i < endRow; ++i)
{
for (int t = startColumn; t < endColumn; ++t)
{
int id;
if ((id = tilemap.TileIdMat[i][t]) > 0)
{
--id;
var dest = new Rectangle(t * tilesheet.TileWidth, i * tilesheet.TileHeight, tilesheet.TileWidth, tilesheet.TileHeight);
int row = id / tilesheet.Columns;
int column = id % tilesheet.Rows;
var src = new Rectangle(column * tilesheet.TileWidth + column * tilesheet.PaddingRight,
row * tilesheet.TileHeight + row * tilesheet.PaddingBottom,
tilesheet.TileWidth, tilesheet.TileHeight);
g.DrawImage(tilesheet.Sheet, dest, src, GraphicsUnit.Pixel);
//g.DrawRectangle(Pens.Black, new Rectangle(t * tilemap.TileWidth, i * tilemap.TileHeight, tilemap.TileWidth, tilemap.TileHeight));
}
}
}
}
