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add collision detection

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This commit is contained in:
Rokas Puzonas 2026-09-15 01:30:35 +03:00
parent 94dc7fef0e
commit e317e21cfe
1 changed files with 133 additions and 85 deletions
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190
src/app.zig
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@ -44,21 +44,22 @@ const PlayerSprites = struct {
}
};
const Tile = struct {
ground_sprite: ?Gfx.Sprite.Id,
entity: Entity.Id,
const empty = Tile{
.ground_sprite = null,
.entity = .nil
};
};
const Tilemap = struct {
tiles: []Tile,
width: usize,
height: usize,
const Tile = struct {
ground_sprite: ?Gfx.Sprite.Id,
wall_sprite: ?Gfx.Sprite.Id,
const empty = Tile{
.ground_sprite = null,
.wall_sprite = null
};
};
pub fn init(gpa: Allocator, width: usize, height: usize) !Tilemap {
const tiles = try gpa.alloc(Tile, width * height);
@memset(tiles, .empty);
@ -84,8 +85,9 @@ const Tilemap = struct {
const Entity = struct {
type: Type,
pos_x: i32 = 0,
pos_y: i32 = 0,
pos_x: i32 = -1,
pos_y: i32 = -1,
visual_pos: Vec2 = .init(0, 0),
sprite: ?Gfx.Sprite.Id = null,
player_direction: Direction = .down,
@ -93,17 +95,83 @@ const Entity = struct {
const Type = enum {
player,
box
box,
wall
};
const SlotMap = Platform.SlotMapType(u8, u16, Entity);
const SlotMap = Platform.SlotMapType(u16, u8, Entity);
const Id = SlotMap.Id;
};
roboto_font: Font,
tilemap: Tilemap,
entities: Entity.SlotMap,
const World = struct {
tilemap: Tilemap,
entities: Entity.SlotMap,
fn spawnPlayer(self: *World) !Entity.Id {
return try self.entities.insert(Entity{
.type = .player,
});
}
fn spawnBox(self: *World, sprite: Gfx.Sprite.Id) !Entity.Id {
return try self.entities.insert(Entity{
.type = .box,
.sprite = sprite
});
}
fn spawnWall(self: *World, sprite: Gfx.Sprite.Id) !Entity.Id {
return try self.entities.insert(Entity{
.type = .wall,
.sprite = sprite
});
}
fn getTile(self: *World, x: i32, y: i32) ?*Tile {
const width: i32 = @intCast(self.tilemap.width);
const height: i32 = @intCast(self.tilemap.height);
if (0 <= x and x < width and 0 <= y and y < height) {
return &self.tilemap.tiles[@intCast(x + y * width)];
}
return null;
}
fn moveEntity(self: *World, id: Entity.Id, x: i32, y: i32) bool {
const e = self.entities.get(id) orelse return false;
const destination_tile = self.getTile(x, y) orelse return false;
if (self.entities.exists(destination_tile.entity)) {
// Cna't overwrite entity
return false;
}
destination_tile.entity = id;
if (self.getTile(e.pos_x, e.pos_y)) |tile| {
tile.entity = .nil;
}
e.pos_x = x;
e.pos_y = y;
return true;
}
fn movePlayer(self: *World, id: Entity.Id, dir_x: i32, dir_y: i32) bool {
const e = self.entities.get(id) orelse return false;
const next_x = e.pos_x+dir_x;
const next_y = e.pos_y+dir_y;
if (!self.moveEntity(id, next_x, next_y)) {
return false;
}
return true;
}
};
world: World,
roboto_font: Font,
tilesheet: Tilesheet,
player_sprites: PlayerSprites,
@ -167,12 +235,13 @@ pub fn init(self: *App, plt: Platform.Init) !?u8 {
.tilesheet = tilesheet,
.footstep_buffer = footstep_sound,
.sfx_bus = Audio.addBus(.{ .label = "sfx" }),
.world = .{
.tilemap = undefined,
.entities = try .initCapacity(plt.gpa, 256)
}
};
var player_pos_x: i32 = 0;
var player_pos_y: i32 = 0;
var player_pos: Vec2 = .zero;
{
var scratch = std.heap.ArenaAllocator.init(plt.gpa);
defer scratch.deinit();
@ -190,7 +259,7 @@ pub fn init(self: *App, plt: Platform.Init) !?u8 {
const bounds = tilemap.getTileBounds();
self.tilemap = try Tilemap.init(plt.gpa, bounds.width(), bounds.height());
self.world.tilemap = try Tilemap.init(plt.gpa, bounds.width(), bounds.height());
const ground = tilemap.getLayer("Ground").?;
const walls = tilemap.getLayer("Walls").?;
@ -199,7 +268,7 @@ pub fn init(self: *App, plt: Platform.Init) !?u8 {
const x = bounds.min_x + ox;
const y = bounds.min_y + oy;
const tile = self.tilemap.get(ox, oy);
const tile = self.world.tilemap.get(ox, oy);
if (tilemap.getTile(ground, tilesets, x, y)) |tiled_tile| {
const pos = tiled_tile.getPosition();
@ -208,17 +277,18 @@ pub fn init(self: *App, plt: Platform.Init) !?u8 {
if (tilemap.getTile(walls, tilesets, x, y)) |tiled_tile| {
const pos = tiled_tile.getPosition();
tile.wall_sprite = tilesheet.get(pos.x, pos.y);
const wall_id = try self.world.spawnWall(tilesheet.get(pos.x, pos.y));
_ = self.world.moveEntity(wall_id, @intCast(ox), @intCast(oy));
}
}
}
const markers = &tilemap.getLayer("Markers").?.variant.object;
const spawn = markers.getByName("spawn").?;
player_pos_x = @divFloor(@as(i32, @intFromFloat(spawn.shape.point.x)), @as(i32, @intCast(tilemap.tile_width)));
player_pos_x -= @intCast(bounds.min_x);
player_pos_y = @divFloor(@as(i32, @intFromFloat(spawn.shape.point.y)),@as(i32, @intCast(tilemap.tile_height)));
player_pos_y -= @intCast(bounds.min_y);
player_pos.x = @divFloor(spawn.shape.point.x, @as(f32, @floatFromInt(tilemap.tile_width)));
player_pos.x -= @floatFromInt(bounds.min_x);
player_pos.y = @divFloor(spawn.shape.point.y, @as(f32, @floatFromInt(tilemap.tile_height)));
player_pos.y -= @floatFromInt(bounds.min_y);
const boxes = tilemap.getLayer("Boxes").?;
for (0..bounds.height()) |oy| {
@ -228,35 +298,19 @@ pub fn init(self: *App, plt: Platform.Init) !?u8 {
if (tilemap.getTile(boxes, tilesets, x, y)) |tiled_tile| {
const pos = tiled_tile.getPosition();
_ = try self.spawnBox(@intCast(ox), @intCast(oy), tilesheet.get(pos.x, pos.y));
const box_id = try self.world.spawnBox(tilesheet.get(pos.x, pos.y));
_ = self.world.moveEntity(box_id, @intCast(ox), @intCast(oy));
}
}
}
}
const player_id = try self.spawnPlayer();
const player = self.entities.getAssumeExists(player_id);
player.pos_x = player_pos_x;
player.pos_y = player_pos_y;
const player_id = try self.world.spawnPlayer();
_ = self.world.moveEntity(player_id, @intFromFloat(player_pos.x), @intFromFloat(player_pos.y));
return null;
}
fn spawnPlayer(self: *App) !Entity.Id {
return try self.entities.insert(Entity{
.type = .player,
});
}
fn spawnBox(self: *App, x: i32, y: i32, sprite: Gfx.Sprite.Id) !Entity.Id {
return try self.entities.insert(Entity{
.type = .box,
.pos_x = x,
.pos_y = y,
.sprite = sprite
});
}
pub fn frame(self: *App, plt: Platform.Frame) !void {
const input = plt.input;
@ -283,32 +337,26 @@ pub fn frame(self: *App, plt: Platform.Frame) !void {
const tile_size = Vec2.init(48, 48);
var canvas = CanvasScaler{
.size = Vec2.initFromInt(usize, self.tilemap.width, self.tilemap.height).multiply(tile_size)
.size = Vec2.initFromInt(usize, self.world.tilemap.width, self.world.tilemap.height).multiply(tile_size)
};
canvas.push();
defer canvas.pop(clear_color);
for (0..self.tilemap.height) |y| {
for (0..self.tilemap.width) |x| {
const tile = self.tilemap.get(x, y);
for (0..self.world.tilemap.height) |y| {
for (0..self.world.tilemap.width) |x| {
const tile = self.world.tilemap.get(x, y);
if (tile.ground_sprite) |sprite| {
Gfx.drawSprite(sprite, Vec2.initFromInt(usize, x, y).multiply(tile_size), tile_size, .white);
}
if (tile.wall_sprite) |sprite| {
Gfx.drawSprite(sprite, Vec2.initFromInt(usize, x, y).multiply(tile_size), tile_size, .white);
}
}
}
var entity_iter = self.entities.iterator();
var entity_iter = self.world.entities.iterator();
while (entity_iter.next()) |entity_id| {
const entity = self.entities.getAssumeExists(entity_id);
const entity = self.world.entities.getAssumeExists(entity_id);
if (entity.type == .player) {
entity.pos_x += dir_x;
entity.pos_y += dir_y;
if ((dir_x != 0 or dir_y != 0) and self.world.movePlayer(entity_id, dir_x, dir_y)) {
var new_direction = entity.player_direction;
if (dir_x < 0) {
new_direction = .left;
@ -325,6 +373,9 @@ pub fn frame(self: *App, plt: Platform.Frame) !void {
entity.player_direction = new_direction;
}
self.footstep_sound = Audio.play(.{ .buffer = self.footstep_buffer, .bus = self.sfx_bus });
}
const frames = self.player_sprites.getDirection(entity.player_direction);
if (dir_x != 0 or dir_y != 0) {
@ -339,35 +390,32 @@ pub fn frame(self: *App, plt: Platform.Frame) !void {
entity.player_frame_index = 0;
}
if (dir_x != 0 or dir_y != 0) {
self.footstep_sound = Audio.play(.{ .buffer = self.footstep_buffer, .bus = self.sfx_bus });
}
entity.sprite = frames[entity.player_frame_index];
}
entity.visual_pos = .initFromInt(i32, entity.pos_x, entity.pos_y);
if (entity.sprite) |sprite| {
Gfx.drawSprite(
sprite,
Vec2.initFromInt(i32, entity.pos_x, entity.pos_y).multiply(tile_size),
entity.visual_pos.multiply(tile_size),
tile_size,
.white
);
}
}
self.roboto_font.drawText(.{
.text = try std.fmt.allocPrint(plt.frame, "Hello {:.0}!", .{plt.time()}),
.pos = .init(0, 0),
.height = 32,
});
// self.roboto_font.drawText(.{
// .text = try std.fmt.allocPrint(plt.frame, "Hello {:.0}!", .{plt.time()}),
// .pos = .init(0, 0),
// .height = 32,
// });
}
pub fn deinit(self: *App, plt: Platform.Deinit) void {
self.roboto_font.deinit(plt.gpa);
Gfx.deinitSpritesheet(self.roboto_font.spritesheet);
self.tilemap.deinit(plt.gpa);
self.entities.slots.deinit(plt.gpa);
self.world.tilemap.deinit(plt.gpa);
self.world.entities.slots.deinit(plt.gpa);
}