// Check if an exact coordinate has a Blocking Square (Ground, BlockTile, HorizontalWall, etc.)
public static bool IsBlockingCoord(TilemapLevel tilemap, int posX, int posY, DirCardinal dir)
{
short gridX = (short)(posX / (byte)TilemapEnum.TileWidth);
short gridY = (short)(posY / (byte)TilemapEnum.TileHeight);
return(CollideTile.IsBlockingSquare(tilemap, gridX, gridY, dir));
}
private void RunTickForObjectGroup(Dictionary <int, GameObject> objectGroup)
{
// Loop through each object in the dictionary, run it's tick:
foreach (var obj in objectGroup)
{
obj.Value.RunTick();
// Run Tile Detection for the Object
CollideTile.RunTileCollision(obj.Value);
}
}
// Identical to "RunTickForObjectGroup", but with an extra overlap test for Characters.
// RunTileCollision only detects what you're moving INTO, not what you're on top of.
// Characters need the additional check to know what they're on top of, such as for Chests, Doors, NPCs, etc.
private void RunTickForCharacterGroup(Dictionary <int, GameObject> objectGroup)
{
foreach (var obj in objectGroup)
{
Character character = (Character)obj.Value;
// If the character is frozen from a reset, prevent them from running any actions.
if (character.frozenFrame >= Systems.timer.Frame)
{
// If we're on the release frame, provide a sound:
if (character.frozenFrame == Systems.timer.Frame)
{
character.room.PlaySound(Systems.sounds.pop, 0.7f, Systems.camera.posX + Systems.camera.halfWidth, Systems.camera.posY + Systems.camera.halfHeight);
}
continue;
}
character.RunTick();
CollideTile.RunTileCollision(character);
// Determine Tiles Potentially Touched
short gridX = character.GridX;
short gridY = character.GridY;
short gridX2 = character.GridX2;
short gridY2 = character.GridY2;
// Run Collision Tests on any tiles beneath the Character (to identify Chests, Doors, NPCs, etc).
CollideTile.RunGridTest(character, gridX, gridY, DirCardinal.Center);
if (gridX != gridX2)
{
CollideTile.RunGridTest(character, gridX2, gridY, DirCardinal.Center);
if (gridY != gridY2)
{
CollideTile.RunGridTest(character, gridX, gridY2, DirCardinal.Center);
CollideTile.RunGridTest(character, gridX2, gridY2, DirCardinal.Center);
}
}
else if (gridY != gridY2)
{
CollideTile.RunGridTest(character, gridX, gridY2, DirCardinal.Center);
}
}
}
// Detect interactions with 4 Grid Squares, with object's X,Y in the Top-Left square.
public static void RunTileCollision(GameObject actor)
{
// Don't run collision if the actor is designated not to collide.
if (actor.CollideVal <= CollideEnum.NoTileCollide)
{
return;
}
// Determine Tiles Potentially Touched
short gridX = actor.GridX;
short gridY = actor.GridY;
short gridX2 = actor.GridX2;
short gridY2 = actor.GridY2;
bool vertOnly = gridX == gridX2;
// If the object is only interacting with vertical squares:
if (vertOnly)
{
if (actor.physics.velocity.Y < 0)
{
CollideTile.RunGridTest(actor, gridX, gridY, DirCardinal.Up);
}
else
{
CollideTile.RunGridTest(actor, gridX, gridY2, DirCardinal.Down);
}
return;
}
bool horOnly = gridY == gridY2;
// If the object is only interacting between two tiles (left and right).
if (horOnly)
{
if (actor.physics.velocity.X >= 0)
{
CollideTile.RunGridTest(actor, gridX2, gridY, DirCardinal.Right);
}
else
{
CollideTile.RunGridTest(actor, gridX, gridY, DirCardinal.Left);
}
return;
}
// If the object is interacting with all four tiles (Top-Left to Bottom-Right).
FInt velX = actor.physics.velocity.X;
FInt velY = actor.physics.velocity.Y;
// If moving downward:
if (velY > 0)
{
// If moving DOWN-RIGHT.
if (velX > 0)
{
// Compare against BOTTOM-LEFT (vs. up) and TOP-RIGHT (vs. left)
bool down = CollideTile.RunGridTest(actor, gridX, gridY2, DirCardinal.Down);
bool right = CollideTile.RunGridTest(actor, gridX2, gridY, DirCardinal.Right);
// Test against corner if neither of the above collided. Direction of collision based on momentum.
if (!down && !right)
{
int yOverlap = actor.posY + actor.bounds.Bottom - (gridY2 * (byte)TilemapEnum.TileHeight); // Returns POSITIVE value
if (yOverlap > velY.RoundInt)
{
CollideTile.RunGridTest(actor, gridX2, gridY2, DirCardinal.Right); return;
}
int xOverlap = actor.posX + actor.bounds.Right - (gridX2 * (byte)TilemapEnum.TileWidth); // Returns POSITIVE value
if (xOverlap > velX.RoundInt)
{
CollideTile.RunGridTest(actor, gridX2, gridY2, DirCardinal.Down);
}
}
}
// If moving DOWN-LEFT:
else if (velX < 0)
{
// Compare against BOTTOM-RIGHT (vs.up) and TOP-LEFT (vs. right)
bool down = CollideTile.RunGridTest(actor, gridX2, gridY2, DirCardinal.Down);
bool left = CollideTile.RunGridTest(actor, gridX, gridY, DirCardinal.Left);
// Test against corner if neither of the above collided. Direction of collision based on momentum.
if (!down && !left)
{
int yOverlap = actor.posY + actor.bounds.Bottom - (gridY2 * (byte)TilemapEnum.TileHeight); // Returns POSITIVE value
if (yOverlap > velY.RoundInt)
{
CollideTile.RunGridTest(actor, gridX, gridY2, DirCardinal.Left); return;
}
int xOverlap = actor.posX + actor.bounds.Left - (gridX2 * (byte)TilemapEnum.TileWidth); // Returns NEGATIVE value
if (xOverlap < velX.RoundInt)
{
CollideTile.RunGridTest(actor, gridX, gridY2, DirCardinal.Down);
}
}
}
// If moving DOWN:
else
{
// Get Overlaps
int xOverlapLeft = actor.posX + actor.bounds.Left - (gridX2 * (byte)TilemapEnum.TileWidth);
int xOverlapRight = actor.posX + actor.bounds.Right - (gridX2 * (byte)TilemapEnum.TileWidth);
// Compare against BOTTOM HALF (vs. up). No corner test.
if (xOverlapLeft < 0)
{
CollideTile.RunGridTest(actor, gridX, gridY2, DirCardinal.Down);
}
if (xOverlapRight > 0)
{
CollideTile.RunGridTest(actor, gridX2, gridY2, DirCardinal.Down);
}
}
}
// If moving upward:
else
{
// If moving UP-RIGHT:
if (velX > 0)
{
// Compare against TOP-LEFT (vs. down) and BOTTOM-RIGHT (vs. left)
bool up = CollideTile.RunGridTest(actor, gridX, gridY, DirCardinal.Up);
bool right = CollideTile.RunGridTest(actor, gridX2, gridY2, DirCardinal.Right);
// Test against corner if neither of the above collided. Direction of collision based on momentum.
if (!up && !right)
{
int yOverlap = actor.posY + actor.bounds.Top - (gridY2 * (byte)TilemapEnum.TileHeight); // Returns NEGATIVE value
if (yOverlap < velY.RoundInt)
{
CollideTile.RunGridTest(actor, gridX2, gridY, DirCardinal.Right); return;
}
int xOverlap = actor.posX + actor.bounds.Right - (gridX2 * (byte)TilemapEnum.TileWidth); // Returns POSITIVE value
if (xOverlap > velX.RoundInt)
{
CollideTile.RunGridTest(actor, gridX2, gridY, DirCardinal.Up);
}
}
}
// If moving UP-LEFT:
else if (velX < 0)
{
// Compare against TOP-RIGHT (vs. down) and BOTTOM-LEFT (vs. right)
bool up = CollideTile.RunGridTest(actor, gridX2, gridY, DirCardinal.Up);
bool left = CollideTile.RunGridTest(actor, gridX, gridY2, DirCardinal.Left);
// Test against corner if neither of the above collided. Direction of collision based on momentum.
if (!up && !left)
{
int yOverlap = actor.posY + actor.bounds.Top - (gridY2 * (byte)TilemapEnum.TileHeight); // Returns NEGATIVE value
if (yOverlap < velY.RoundInt)
{
CollideTile.RunGridTest(actor, gridX, gridY, DirCardinal.Left); return;
}
int xOverlap = actor.posX + actor.bounds.Left - (gridX2 * (byte)TilemapEnum.TileWidth); // Returns NEGATIVE value
if (xOverlap < velX.RoundInt)
{
CollideTile.RunGridTest(actor, gridX, gridY, DirCardinal.Up);
}
}
}
// If moving UP:
else
{
// Get Overlaps
int xOverlapLeft = actor.posX + actor.bounds.Left - (gridX2 * (byte)TilemapEnum.TileWidth);
int xOverlapRight = actor.posX + actor.bounds.Right - (gridX2 * (byte)TilemapEnum.TileWidth);
// Compare against TOP HALF (vs. down). No corner test.
if (xOverlapLeft < 0)
{
CollideTile.RunGridTest(actor, gridX, gridY, DirCardinal.Up);
}
if (xOverlapRight > 0)
{
CollideTile.RunGridTest(actor, gridX2, gridY, DirCardinal.Up);
}
}
}
}
