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83 lines
3.3 KiB
83 lines
3.3 KiB
import { globalConfig } from "../../core/config";
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import { drawRotatedSprite } from "../../core/draw_utils";
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import { Loader } from "../../core/loader";
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import { enumDirectionToAngle } from "../../core/vector";
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import { BeltUnderlaysComponent } from "../components/belt_underlays";
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import { GameSystemWithFilter } from "../game_system_with_filter";
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import { BELT_ANIM_COUNT } from "./belt";
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import { MapChunkView } from "../map_chunk_view";
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import { DrawParameters } from "../../core/draw_parameters";
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export class BeltUnderlaysSystem extends GameSystemWithFilter {
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constructor(root) {
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super(root, [BeltUnderlaysComponent]);
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this.underlayBeltSprites = [];
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for (let i = 0; i < BELT_ANIM_COUNT; ++i) {
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this.underlayBeltSprites.push(Loader.getSprite("sprites/belt/built/forward_" + i + ".png"));
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}
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}
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/**
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* Draws a given chunk
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* @param {DrawParameters} parameters
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* @param {MapChunkView} chunk
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*/
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drawChunk(parameters, chunk) {
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// Limit speed to avoid belts going backwards
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const speedMultiplier = Math.min(this.root.hubGoals.getBeltBaseSpeed(), 10);
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const contents = chunk.containedEntitiesByLayer.regular;
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for (let i = 0; i < contents.length; ++i) {
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const entity = contents[i];
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const underlayComp = entity.components.BeltUnderlays;
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if (underlayComp) {
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const staticComp = entity.components.StaticMapEntity;
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const underlays = underlayComp.underlays;
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for (let i = 0; i < underlays.length; ++i) {
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const { pos, direction } = underlays[i];
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const transformedPos = staticComp.localTileToWorld(pos);
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// Culling
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if (!chunk.tileSpaceRectangle.containsPoint(transformedPos.x, transformedPos.y)) {
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continue;
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}
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const destX = transformedPos.x * globalConfig.tileSize;
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const destY = transformedPos.y * globalConfig.tileSize;
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// Culling, #2
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if (
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parameters.visibleRect.containsRect4Params(
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destX,
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destY,
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globalConfig.tileSize,
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globalConfig.tileSize
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)
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) {
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continue;
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}
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const angle = enumDirectionToAngle[staticComp.localDirectionToWorld(direction)];
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// SYNC with systems/belt.js:drawSingleEntity!
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const animationIndex = Math.floor(
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((this.root.time.realtimeNow() * speedMultiplier * BELT_ANIM_COUNT * 126) / 42) *
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globalConfig.itemSpacingOnBelts
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);
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drawRotatedSprite({
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parameters,
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sprite: this.underlayBeltSprites[animationIndex % this.underlayBeltSprites.length],
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x: destX + globalConfig.halfTileSize,
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y: destY + globalConfig.halfTileSize,
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angle: Math.radians(angle),
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size: globalConfig.tileSize,
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});
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}
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}
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}
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}
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}
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