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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | 16x 16x 16x 4x 4x 4x 2x 1x 1x 1x 1x 1x 1x 1x | import { DisplayInterface } from "jga-games-display";
import { isAppearanceComponent, isPositionComponent, ComponentName } from "../components";
import { Entity } from "../entities";
import { System } from "./system";
export interface OffsetInterface {
x: number;
y: number;
}
export class DrawSystem extends System {
protected display: DisplayInterface;
protected offset: OffsetInterface;
public constructor(
entities: Map<string, Entity>,
display: DisplayInterface,
offset: OffsetInterface = { x: 0, y: 0 },
) {
super(entities, [ComponentName.APPEARANCE, ComponentName.POSITION]);
this.display = display;
this.offset = offset;
}
public getOffset(): OffsetInterface {
return this.offset;
}
public run(): void {
return this.entities.forEach((entity): void => {
const positionComponent = entity.getComponent(ComponentName.POSITION);
const appeareanceComponent = entity.getComponent(ComponentName.APPEARANCE);
if (isPositionComponent(positionComponent)) {
const position = {
x: positionComponent.getPosition().x - this.offset.x,
y: positionComponent.getPosition().y - this.offset.y,
};
if (isAppearanceComponent(appeareanceComponent)) {
this.display.draw(position, appeareanceComponent.getGlyph());
}
}
});
}
}
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