public Entity(EntityCombatAI combatAI, EntityTaskAI taskAI, EntityMovementData movementData, string name = "un-named_entity", bool isFixed = false)
{
Name = name;
IsFixed = isFixed;
SetPosition(Vector3.zero);
EntityAI = new EntityAI(this, combatAI, taskAI);
Inventory = new Inventory();
CombatManager = new EntityCombatManager(this);
SkillTree = new SkillTree();
MovementData = movementData;
}
public Entity(EntityCombatAI combatAI, EntityTaskAI taskAI, EntityMovementData movementData, string name = "un-named_entity", bool isFixed = false)
{
Name = name;
IsFixed = isFixed;
// MoveEntity(Vector3.zero);
Debug.Log("Base entity created");
EntityAI = new EntityAI(this, combatAI, taskAI);
Inventory = new Inventory();
CombatManager = new EntityCombatManager(this);
SkillTree = new SkillTree();
MovementData = movementData;
CurrentSubworldID = -1;
IsAlive = true;
}
// Checks how far this entity can move along the path without hitting a map obstruction. If an
// obstruction is encountered, it edits the movement data to account for it.
protected virtual void try_to_move_obs(ref EntityMovementData data)
{
Point closest_obs = hitbox.Location;
int max_distance;
Point pixel_path, sign, farthest;
// The target pixel is where the character's upper-left hitbox pixel will be if it
// moves the full possible distance.
pixel_path = new Point(((int)Math.Floor(_exact_pos.X + data.attempted_path.X)) - hitbox.X,
((int)Math.Floor(_exact_pos.Y + data.attempted_path.Y)) - hitbox.Y);
sign = new Point(Math.Sign(pixel_path.X), Math.Sign(pixel_path.Y));
if (sign.X == 0 && sign.Y == 0) return; // no between-pixel movement;
farthest = new Point(hitbox.X + pixel_path.X, hitbox.Y + pixel_path.Y);
max_distance = Int32.MaxValue;
if (sign.X != 0) { // moving horizontally -- check collision with left or right side
_try_move_project_side(pixel_path, true, ref max_distance, ref farthest);
}
if (sign.Y != 0) { // moving vertically -- check collision with top or bottom
_try_move_project_side(pixel_path, false, ref max_distance, ref farthest);
}
if (max_distance < Int32.MaxValue) { // obstructed
data.collided = true;
data.actual_path = new Vector2((float)farthest.X - hitbox.X, (float)farthest.Y - hitbox.Y);
return;
}
}
// A helper for try_to_move(). This checks the prospective path for obstructing
// entities and returns a new path indicating how far the entity can move without
// hitting one.
protected virtual void try_to_move_ent(ref EntityMovementData data)
{
Point pixel_path, best_path, cur_path;
Rectangle goal;
int best_distance, cur_distance;
VERGEMap map = VERGEGame.game.map;
BoundedSpace<Entity>.BoundedElementSet ent_enum;
Entity ent, nearest_ent = null;
// The target pixel is where the character's upper-left hitbox pixel will be if it
// moves the full possible distance.
pixel_path = new Point(((int)Math.Floor(_exact_pos.X + data.attempted_path.X)) - hitbox.X,
((int)Math.Floor(_exact_pos.Y + data.attempted_path.Y)) - hitbox.Y);
best_distance = Math.Abs(pixel_path.X) + Math.Abs(pixel_path.Y);
if (best_distance <= 0) return; // no between-pixel movement;
best_path = pixel_path;
goal = hitbox;
goal.Offset(pixel_path.X, pixel_path.Y);
ent_enum = VERGEGame.game.entity_space.elements_within_bounds(Rectangle.Union(hitbox, goal), true, this);
while (ent_enum.GetNext(out ent)) {
if (ent.obstructing && ent.visible) {
cur_path = pixel_path;
if (test_collision(ent.hitbox, ref cur_path)) {
cur_distance = Math.Abs(cur_path.X) + Math.Abs(cur_path.Y);
System.Diagnostics.Debug.Assert(cur_distance <= Math.Abs(pixel_path.X) + Math.Abs(pixel_path.Y)); // THis should always be strictly < but sometimes it's not???hmm
if (cur_distance < best_distance) {
best_distance = cur_distance;
best_path = cur_path;
nearest_ent = ent;
}
}
}
}
if (nearest_ent != null) {
data.collided = true;
data.collided_entity = nearest_ent;
data.actual_path.X = (float)best_path.X;
data.actual_path.Y = (float)best_path.Y;
}
}
public virtual void try_to_move(ref EntityMovementData data)
{
try_to_move_obs(ref data);
try_to_move_ent(ref data);
return;
}
public override void Update()
{
// This function, like the movement handlers, mostly works with "speed-adjusted" rather than real time.
// A unit difference in the time variables it employs corresponds to a difference of 1/Entity.speed ticks.
int elapsed;
float time_factor;
double root1, root2;
Vector2 velocity_change;
EntityMovementData data = new EntityMovementData();
data.time = ( VERGEGame.game.tick - last_logic_tick ) * speed;
data.time_shortfall = 0;
data.first_call = true;
data.collided = false;
data.collided_entity = null;
data.actual_path = data.attempted_path = Vector2.Zero;
data.starting_point = _exact_pos;
time_factor = 0f;
// Now for the gross part. Maybe this should be moved to another function?
while( data.time > 0 ) {
data.time_shortfall = elapsed = data.time - handler( this, move_state, ref data );
time_factor = ( (float)elapsed ) / speed; // time passed this step, in ticks, as a float.
velocity_change = time_factor * acceleration;
data.actual_path = data.attempted_path = time_factor * ( velocity + velocity_change / 2 ); // cur_pos = old_pos + v*t + a*(t^2)/2
if( this.obstructable ) {
if( data.attempted_path != Vector2.Zero ) {
data.collided = false;
data.collided_entity = null;
try_to_move( ref data ); // maybe truncate actual_path
if( data.collided ) {
// If the entity was interrupted by a collision, "give back" some of its spent time
if( data.actual_path == Vector2.Zero ) {
elapsed = 0;
velocity_change = Vector2.Zero;
}
// If acceleration is 0, we can just interpolate.
else if( acceleration == Vector2.Zero ) {
// we only need to look at one dimension, so we'll take the bigger one
if( Math.Abs( data.actual_path.X ) > Math.Abs( data.actual_path.Y ) )
elapsed = (int)Math.Ceiling( elapsed * data.actual_path.X / data.attempted_path.X );
else
elapsed = (int)Math.Ceiling( elapsed * data.actual_path.Y / data.attempted_path.Y );
} else {
// Okay, hunker down because this is the gross part. When acceleration is a nonzero
// constant, we can't simply interpolate but must instead solve a quadratic equation
// in the elapsed time: new_pos = A/2*t^2 + V*t + old_pos. The constraints of the
// scenario ensure that there is at least one positive root, but there could also be
// two, in which case we want the smallest positive root, which represents the earliest
// time in the future that the obstruction will be hit.
// we only need to look at one dimension, so we'll take the bigger one
if( Math.Abs( data.actual_path.X ) > Math.Abs( data.actual_path.Y ) ) {
root1 = Math.Sqrt( velocity.X * velocity.X + 2 * acceleration.X * data.actual_path.X );
root2 = ( -velocity.X + root1 ) / acceleration.X;
root1 = ( -velocity.X - root1 ) / acceleration.X;
} else {
root1 = Math.Sqrt( velocity.Y * velocity.Y + 2 * acceleration.Y * data.actual_path.Y );
root2 = ( -velocity.Y + root1 ) / acceleration.Y;
root1 = ( -velocity.Y - root1 ) / acceleration.Y;
}
// Set root1 to the root we actually want (smallest positive).
if( root1 < 0 || root1 > root2 && root2 > 0 ) root1 = root2;
elapsed = (int)Math.Ceiling( root1 * speed );
velocity_change = ( (float)elapsed ) / speed * acceleration;
}
}
} else if( elapsed < data.time ) {
data.collided = false;
data.collided_entity = null;
}
}
if( data.actual_path != Vector2.Zero ) {
exact_x += data.actual_path.X;
exact_y += data.actual_path.Y;
}
velocity += velocity_change;
data.time_shortfall -= elapsed;
data.time -= elapsed;
data.first_call = false;
}
if( data.collided ) {
time_pushing += time_factor;
// Pushing-related triggers happen here.
if( movestring != null ) {
if( movestring.timeout != Movestring.NEVER_TIMEOUT && time_pushing > movestring.timeout )
movestring.do_timeout();
}
} else time_pushing = 0f;
VERGEGame.game.entity_space.Update( this );
last_logic_tick = VERGEGame.game.tick;
}
public DungeonBoss(EntityCombatAI combatAI, EntityTaskAI taskAI, EntityMovementData movementData = default(EntityMovementData),
string name = "un-named_entity", bool isFixed = false)
: base(combatAI, taskAI, movementData, name, isFixed)
{
}
public HumanoidEntity(EntityCombatAI combatAI, EntityTaskAI taskAI, EntityMovementData movementData, string name = "un-named_entity", bool isFixed = false)
: base(combatAI, taskAI, movementData, name, isFixed)
{
EquiptmentManager = new EquiptmentManager(this);
}
public static int entity_movescript_handler(Entity ent, Object state, ref EntityMovementData data)
{
int cur_param, time_left;
Movestring movestring;
ent.velocity = Vector2.Zero;
ent.acceleration = Vector2.Zero;
time_left = data.time;
movestring = ent.movestring;
// Movement failed. As with VERGE, the standard policy is just to mash up against the obstruction forever
// and hope it goes away somehow.
if (data.collided) {
if (movestring.movement_left == Int32.MinValue) movestring.movement_left = data.time_shortfall;
else movestring.movement_left += data.time_shortfall;
return 0;
}
while (time_left > 0) {
if (movestring.movement_left == Int32.MinValue) {
movestring.movement_left = 0;
movestring.step++;
}
time_left = movestring.ready(time_left);
if (time_left <= 0 && ent.moving) ent.set_walk_state(false);
if (movestring.movement_left <= 0) { // If not currently walking
cur_param = movestring.parameters[movestring.step];
switch (movestring.commands[movestring.step]) {
case MovestringCommand.Face:
ent.facing = Utility.movestring_face_to_direction(cur_param);
movestring.step++;
break;
case MovestringCommand.Frame:
if (cur_param >= 0) ent.set_frame(cur_param);
else ent.resume_animation();
movestring.step++;
break;
case MovestringCommand.ToX:
if (movestring.tile_movement) cur_param *= game.map.tileset.tilesize;
cur_param -= ent.x; // convert to relative position
if (cur_param < 0) // Target is to the left of entity
set_up_cardinal_movement(ent, Direction.Left, -cur_param, false);
else // Target is to the right of entity
set_up_cardinal_movement(ent, Direction.Right, cur_param, false);
break;
case MovestringCommand.ToY:
if (movestring.tile_movement) cur_param *= game.map.tileset.tilesize;
cur_param -= ent.y; // convert to relative position
if (cur_param < 0) // Target is above entity
set_up_cardinal_movement(ent, Direction.Up, -cur_param, false);
else // Target is below entity
set_up_cardinal_movement(ent, Direction.Down, cur_param, false);
break;
case MovestringCommand.Up:
set_up_cardinal_movement(ent, Direction.Up, cur_param, movestring.tile_movement);
break;
case MovestringCommand.Down:
set_up_cardinal_movement(ent, Direction.Down, cur_param, movestring.tile_movement);
break;
case MovestringCommand.Left:
set_up_cardinal_movement(ent, Direction.Left, cur_param, movestring.tile_movement);
break;
case MovestringCommand.Right:
set_up_cardinal_movement(ent, Direction.Right, cur_param, movestring.tile_movement);
break;
}
}
if (movestring.movement_left > 0) {
if (movestring.movement_left <= time_left) { // Can move farther than is needed in the remaining time
ent.velocity += Utility.velocity_from_direction(ent.movement_direction, movestring.movement_left / 100f,
((float)movestring.movement_left) / ent.speed);
time_left -= movestring.movement_left;
movestring.movement_left = Int32.MinValue;
return time_left;
}
else { // Entity will spend the entire period moving
ent.velocity += Utility.velocity_from_direction(ent.movement_direction, ent.speed, 100f);
movestring.movement_left -= time_left;
return 0;
}
}
}
return 0;
}
// Moves the entity in accordance with the player's inputs. This works like VERGE player input
// EXCEPT that, when diagonals are enabled, it moves the player at the same speed overall
// (unlike VERGE, which moved them both vertically and horizontally as fast as if they were
// moving in that direction alone)
public static int vergestyle_player_movement_handler(Entity ent, Object state, ref EntityMovementData data)
{
int x = 0, y = 0;
float factor;
Vector2 ofs;
VERGEMap map;
Point pt;
Rectangle box;
ent.velocity = ent.acceleration = Vector2.Zero;
ent.acceleration = Vector2.Zero;
if (data.first_call) {
if (VERGEGame.game.dir.left.down) x--;
if (VERGEGame.game.dir.right.down) x++;
if (VERGEGame.game.dir.up.down) y--;
if (VERGEGame.game.dir.down.down) y++;
}
else if (data.collided) {
// Hacky sliding code. Clean this shit up sometime!
map = VERGEGame.game.map;
x = Math.Sign(data.attempted_path.X);
y = Math.Sign(data.attempted_path.Y);
if (data.obstructed_by_entity) {
box = data.collided_entity.hitbox;
if (box.Top < ent.hitbox.Bottom && box.Bottom > ent.hitbox.Top) x = 0;
if (box.Left < ent.hitbox.Right && box.Right > ent.hitbox.Left) y = 0;
if (x != 0 && y != 0) { x = 0; y = 0; }
}
if (x == 0 && y != 0) {
pt = new Point(ent.hitbox.X + 1,
ent.hitbox.Y + y + (1 + y) * (ent.hitbox.Height - 1) / 2);
for (int i = 0; i < ent.hitbox.Width - 2; i++) { // first check all but the ends
if (map.obs_at_pixel(pt.X, pt.Y)) {
y = 0;
break;
}
pt.X++;
}
if (y != 0) {
if (map.obs_at_pixel(ent.hitbox.Left, pt.Y)) {
if (!map.obs_at_pixel(ent.hitbox.Right - 1, pt.Y)) x = 1;
else y = 0;
}
else if (map.obs_at_pixel(ent.hitbox.Right - 1, pt.Y)) {
if (!map.obs_at_pixel(ent.hitbox.Left, pt.Y)) x = -1;
else y = 0;
}
if (x != 0) {
pt.X = ent.hitbox.X + x + (1 + x) * (ent.hitbox.Width - 1) / 2;
for (int i = 0; i < ent.hitbox.Height + 1; i++) {
if (map.obs_at_pixel(pt.X, pt.Y)) {
x = 0;
y = 0;
break;
}
pt.Y -= y;
}
}
}
}
else if (y == 0 && x != 0) {
pt = new Point(ent.hitbox.X + x + (1 + x) * (ent.hitbox.Width - 1) / 2,
ent.hitbox.Y + 1);
for (int i = 0; i < ent.hitbox.Height - 2; i++) { // first check all but the ends
if (map.obs_at_pixel(pt.X, pt.Y)) {
x = 0;
break;
}
pt.Y++;
}
if (x != 0) {
if (map.obs_at_pixel(pt.X, ent.hitbox.Top)) {
if (!map.obs_at_pixel(pt.X, ent.hitbox.Bottom - 1)) y = 1;
else x = 0;
}
else if (map.obs_at_pixel(pt.X, ent.hitbox.Bottom - 1)) {
if (!map.obs_at_pixel(pt.X, ent.hitbox.Top)) y = -1;
else x = 0;
}
if (y != 0) {
pt.Y = ent.hitbox.Y + y + (1 + y) * (ent.hitbox.Height - 1) / 2;
for (int i = 0; i < ent.hitbox.Width + 1; i++) {
if (map.obs_at_pixel(pt.X, pt.Y)) {
x = 0;
y = 0;
break;
}
pt.X -= x;
}
}
}
}
else if (x != 0 && y != 0) {
pt = new Point(ent.hitbox.X + x + (1 + x) * (ent.hitbox.Width - 1) / 2,
ent.hitbox.Y + (1 + y) * (ent.hitbox.Height - 1) / 2);
for (int i=0; i < ent.hitbox.Height; i++) {
if (map.obs_at_pixel(pt.X, pt.Y)) {
x = 0;
break;
}
pt.Y -= y;
}
pt = new Point(ent.hitbox.X + (1 + x) * (ent.hitbox.Width - 1) / 2,
ent.hitbox.Y + y + (1 + y) * (ent.hitbox.Height - 1) / 2);
for (int i = 0; i < ent.hitbox.Width; i++) {
if (map.obs_at_pixel(pt.X, pt.Y)) {
y = 0;
break;
}
pt.X -= x;
}
if (x != 0 && y != 0 &&
map.obs_at_pixel(ent.hitbox.X + x + (1 + x) * (ent.hitbox.Width - 1) / 2,
ent.hitbox.Y + y + (1 + y) * (ent.hitbox.Height - 1) / 2)) {
if (Math.Abs(data.attempted_path.X) > Math.Abs(data.attempted_path.Y)) y = 0;
else if (Math.Abs(data.attempted_path.X) < Math.Abs(data.attempted_path.Y)) x = 0;
else {x = 0; y = 0; }
}
if (x == 0 && y == 0) return 0;
}
if (x != 0 && y != 0) { // adjust alignment for diagonal movement
ofs = new Vector2( Math.Abs((float) (ent.hitbox.X + (1 + x) / 2) - ent.exact_x),
Math.Abs((float) (ent.hitbox.Y + (1 + y) / 2) - ent.exact_y));
if (ofs.X < ofs.Y) ent.exact_y += y * (ofs.Y - ofs.X);
else if (ofs.X > ofs.Y) ent.exact_x += x * (ofs.X - ofs.Y);
}
}
if (x == 0 && y == 0) {
if (ent.moving) ent.set_walk_state(false);
}
else {
ent.velocity.X = (float)x;
ent.velocity.Y = (float)y;
if (!ent.moving) ent.set_walk_state(true);
factor = ent.speed / 100f;
ent.movement_direction = Utility.direction_from_signs(x, y, true);
if (!data.collided) { // Moving normally
ent.facing = Utility.direction_from_signs(x, y, false);
}
if (Math.Abs(x) + Math.Abs(y) == 2) factor *= Utility.INV_SQRT2; // diagonal movement
ent.velocity *= factor;
if (data.collided) { // if sliding, move at most one pixel in this handler iteration
// figure out how much time it will take to move one pixel
factor = data.time - ent.speed;
if (Math.Abs(x) + Math.Abs(y) == 2) factor *= Utility.SQRT2;
return Math.Max((int)Math.Floor(factor), 0);
}
}
return 0;
}
// A general purpose VERGE-emulation handler that defers to various other handlers depending on
// the entity's state.
public static int omnibus_vergestyle_handler(Entity ent, Object state, ref EntityMovementData data)
{
if (ent == VERGEGame.game.player && VERGEGame.game.player_controllable)
return vergestyle_player_movement_handler(ent, state, ref data);
else
return entity_movescript_handler(ent, state, ref data);
}
