68 lines
1.7 KiB
TypeScript
68 lines
1.7 KiB
TypeScript
import type { Box } from "#/engine/lib/box";
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import { sceneChangeSet, sceneComponentsMap } from "#/engine/Scene.ts";
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import { drawSprite, type Sprite, spriteSheetMap } from "#/engine/Sprite.ts";
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import type { Vector } from "#/engine/Vector.ts";
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import { viewport } from "#/engine/Viewport.ts";
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type Drawable = { position: Box<Vector>; sprite: Box<Sprite> };
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const drawables: Array<Drawable> = [];
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const visibleDrawables: Array<Drawable> = [];
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sceneChangeSet.add((sceneData) => {
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drawables.length = 0;
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const sprites = [
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...sceneComponentsMap.get(sceneData.name)!.get("sprite")!.values(),
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] as Array<Box<Sprite>>;
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sceneComponentsMap
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.get(sceneData.name)!
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.get("position")!
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.values()
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.forEach((box, index) => {
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drawables.push({
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position: box as Box<Vector>,
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sprite: sprites[index],
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});
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});
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});
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export function drawSprites(ctx: CanvasRenderingContext2D): void {
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const { boundaries } = viewport;
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visibleDrawables.length = 0;
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for (const drawable of drawables) {
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const pos = drawable.position.value;
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const sprite = drawable.sprite.value;
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const relX = pos.x + sprite.offset.x;
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const relY = pos.y + sprite.offset.y;
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if (
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relX + sprite.width > boundaries.minX &&
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relX < boundaries.maxX &&
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relY + sprite.height > boundaries.minY &&
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relY < boundaries.maxY
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) {
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visibleDrawables.push(drawable);
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}
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}
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for (const drawable of visibleDrawables.sort(
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(a, b) => a.position.value.y - b.position.value.y,
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)) {
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const sprite = drawable.sprite.value;
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const position = drawable.position.value;
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drawSprite(
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ctx,
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spriteSheetMap.get(sprite.src)!,
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sprite.xStart,
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sprite.yStart,
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position.x + sprite.offset.x,
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position.y + sprite.offset.y,
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);
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}
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}
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