usg/src/Game.zig

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const std = @import("std");
const SDL = @import("sdl2");
const Grid = @import("Game/Grid.zig");
const Piece = @import("Game/Piece.zig");
const Bag = @import("Game/Bag.zig");
const Timer = @import("Timer.zig");
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const State = @import("flow.zig").State;
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const Action = @import("Action.zig");
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const Renderer = @import("Game/Renderer.zig");
const movement = @import("Game/movement.zig");
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const Self = @This();
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// Codes to access action list
pub const ActionCode = enum(usize) {
right = 0,
left = 1,
down = 2,
hard = 3,
swap = 4,
rot_r = 5,
rot_l = 6,
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};
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grid: Grid,
renderer: Renderer,
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state: State = State.game,
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bag: Bag,
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held: ?Piece.Type,
piece: Piece,
shadow: Piece,
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action_list: [7]Action = .{
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Action.init(SDL.Scancode.d, actionRight), // Right
Action.init(SDL.Scancode.a, actionLeft), // Left
Action.init(SDL.Scancode.s, actionDown), // Down
Action.init(SDL.Scancode.w, actionHard), // Instant Drop
Action.init(SDL.Scancode.space, actionSwap), // Swap Piece
Action.init(SDL.Scancode.right, actionRotR), // Rotate
Action.init(SDL.Scancode.left, actionRotL), // Rotate
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},
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timer_down: Timer,
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timer_left_arr: Timer,
timer_left_das: Timer,
timer_right_arr: Timer,
timer_right_das: Timer,
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timer_gravity: Timer,
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pub fn init(renderer: Renderer.Renderer) Self {
var ret = Self{
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.grid = Grid.init(),
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.bag = Bag.init(),
.piece = undefined,
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.shadow = undefined,
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.held = null,
.renderer = Renderer.init(renderer),
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.timer_down = Timer.init(50),
.timer_left_arr = Timer.init(50),
.timer_left_das = Timer.init(200),
.timer_right_arr = Timer.init(50),
.timer_right_das = Timer.init(200),
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.timer_gravity = Timer.init(200),
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};
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// Get a piece from the bag
ret.piece = ret.bag.pop();
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return ret;
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}
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pub fn tick(self: *Self) State {
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// TIMERS
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// Dropping a piece
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if (self.piece.timer_dropped.finished()) {
self.piece.timer_dropped.stop();
self.piece.dropped = true;
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}
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// Repeat Right
// DAS
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if (self.action_list[@enumToInt(ActionCode.right)].holding) {
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if (!self.timer_right_das.started) {
self.timer_right_das.start();
}
} else {
// Stop both
self.timer_right_das.stop();
self.timer_right_arr.stop();
}
// ARR
if (self.timer_right_das.finished()) {
if (!self.timer_right_arr.started) {
self.timer_right_arr.start();
} else if (self.timer_right_arr.finished()) {
self.timer_right_arr.stop();
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self.action_list[@enumToInt(ActionCode.right)].holding = false;
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}
}
// Repeat Left
// DAS
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if (self.action_list[@enumToInt(ActionCode.left)].holding) {
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if (!self.timer_left_das.started) {
self.timer_left_das.start();
}
} else {
// Stop both
self.timer_left_das.stop();
self.timer_left_arr.stop();
}
// ARR
if (self.timer_left_das.finished()) {
if (!self.timer_left_arr.started) {
self.timer_left_arr.start();
} else if (self.timer_left_arr.finished()) {
self.timer_left_arr.stop();
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self.action_list[@enumToInt(ActionCode.left)].holding = false;
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}
}
// Repeat Down
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if (self.action_list[@enumToInt(ActionCode.down)].holding) {
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if (!self.timer_down.started) {
self.timer_down.start();
} else if (self.timer_down.finished()) {
self.timer_down.stop();
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self.action_list[@enumToInt(ActionCode.down)].holding = false;
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}
} else {
self.timer_down.stop();
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}
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// Gravity
if (!self.piece.timer_dropped.started) {
if (!self.timer_gravity.started) {
self.timer_gravity.start();
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} else if (self.timer_gravity.finished()) {
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self.action_list[@enumToInt(ActionCode.down)].activate = true;
self.timer_gravity.start();
}
} else {
self.timer_gravity.stop();
}
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// DROP
if (self.piece.dropped) {
self.grid = movement.drop(self.grid, self.piece);
// New Piece
self.piece = self.bag.pop();
}
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// KEY EVENTS
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var key_state = SDL.getKeyboardState();
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for (self.action_list) |*action| {
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if (key_state.isPressed(action.*.scancode) and !action.*.holding) {
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action.*.holding = true;
action.*.activate = true;
}
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if (!key_state.isPressed(action.*.scancode)) {
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action.*.holding = false;
}
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// Action
if (action.*.activate) {
action.*.activate = false;
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action.*.call(self);
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}
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}
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// Update Shadow
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{
self.shadow = movement.shadow(self.grid, self.piece);
self.shadow.color.a /= 4;
}
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self.grid.clearLines();
self.renderer.render(self.*);
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return self.state;
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}
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// ACTION CALLBACKS
fn actionDown(self: *Self) void {
self.piece = movement.moveDown(self.grid, self.piece);
}
fn actionRight(self: *Self) void {
self.piece = movement.moveRight(self.grid, self.piece);
}
fn actionLeft(self: *Self) void {
self.piece = movement.moveLeft(self.grid, self.piece);
}
fn actionHard(self: *Self) void {
self.piece = movement.hardDrop(self.grid, self.piece);
}
fn actionSwap(self: *Self) void {
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if (self.held) |held_piece| {
if (!self.piece.swapped) {
self.held = self.piece.piece_type;
self.piece = Piece.init(held_piece);
self.piece.swapped = true;
}
} else {
self.held = self.piece.piece_type;
self.piece = self.bag.pop();
self.piece.swapped = true;
}
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}
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fn actionRotR(self: *Self) void {
self.piece = movement.rotateRight(self.grid, self.piece);
}
fn actionRotL(self: *Self) void {
self.piece = movement.rotateLeft(self.grid, self.piece);
}