static/src/engine/component.ts


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export enum ComponentType {
  POSITION = "POSITION",
  RENDERABLE = "RENDERABLE",
  TRAILING_POSITION = "TRAILING_POSITION",
  SPRITESHEET = "SPRITESHEET",
}

export interface Component {
  name: ComponentType;
}

export interface PositionComponent extends Component {
  name: ComponentType.POSITION;
  x: number;
  y: number;
}

export interface TrailingPositionComponent extends Component {
  name: ComponentType.TRAILING_POSITION;
  trails: Array<{ x: number; y: number; time: number }>;
}

export interface RenderableComponent extends Component {
  name: ComponentType.RENDERABLE;
}

export interface SpriteSpec {
  ms_per_frame: number;
  frames: number;
  top_x: number;
  top_y: number;
  end_x: number;
  end_y: number;
}

export interface SpriteSheetComponent extends Component {
  name: ComponentType.SPRITESHEET;
  source: string;
  sheet: HTMLImageElement;

  current_frame: number;
  last_update: number;
  current_state: string;

  state_to_spritespec: Record<string, SpriteSpec>;
}