82 lines
2.9 KiB
JavaScript
82 lines
2.9 KiB
JavaScript
"use strict";
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// Layer: simulation/helpers
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// Shared, UI-free helpers used by the concrete simulation systems.
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(function (global) {
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const policy = global.TarinaiItemUpdatePolicy;
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function forScheduledItems(worldRef, visitor) {
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return policy.forScheduledItems(worldRef, visitor);
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}
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function updateItemsScheduled(worldRef, dt) {
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return global.TarinaiItemRuntime.updateScheduled(worldRef, dt);
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}
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function trackSpatialEntityMoved(entity, thresholdSq) {
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if (!entity || entity.dead) return false;
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const x = Number.isFinite(entity.x) ? entity.x : 0;
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const y = Number.isFinite(entity.y) ? entity.y : 0;
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const oldX = entity._spatialTrackX;
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const oldY = entity._spatialTrackY;
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if (!Number.isFinite(oldX) || !Number.isFinite(oldY)) {
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entity._spatialTrackX = x;
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entity._spatialTrackY = y;
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return true;
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}
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const dx = x - oldX;
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const dy = y - oldY;
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if (dx * dx + dy * dy <= thresholdSq) return false;
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entity._spatialTrackX = x;
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entity._spatialTrackY = y;
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return true;
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}
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function markSpatialDirtyIfMoved(worldRef, list, reason = "moved", threshold = 0.35) {
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if (!worldRef || !Array.isArray(list) || !list.length) return false;
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const thresholdSq = threshold * threshold;
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let moved = false;
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for (const entity of list) moved = trackSpatialEntityMoved(entity, thresholdSq) || moved;
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if (moved) worldRef.markSpatialDirty?.(reason);
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return moved;
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}
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function markScheduledItemsMoved(worldRef, reason = "items-moved", threshold = 0.35) {
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if (!worldRef) return false;
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const thresholdSq = threshold * threshold;
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let moved = false;
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const tracked = global.TarinaiItemRuntime.trackedDynamicItems(worldRef);
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const source = tracked && tracked.length ? tracked : null;
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const visit = (entity) => { moved = trackSpatialEntityMoved(entity, thresholdSq) || moved; };
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if (source) for (const entity of source) visit(entity);
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else forScheduledItems(worldRef, visit);
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if (moved) worldRef.markSpatialDirty?.(reason);
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return moved;
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}
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function updateVisibleWorldRect(worldRef, margin = 120) {
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const scale = worldRef.viewScale ? worldRef.viewScale() : 1;
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const vw = (worldRef.viewportW || worldRef.w || 1000) / Math.max(0.01, scale);
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const vh = (worldRef.viewportH || worldRef.h || 720) / Math.max(0.01, scale);
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const cameraX = worldRef.cameraX || 0;
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const cameraY = worldRef.cameraY || 0;
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return { left: cameraX - margin, top: cameraY - margin, right: cameraX + vw + margin, bottom: cameraY + vh + margin };
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}
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function pointInRect(x, y, rect) {
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return x >= rect.left && x <= rect.right && y >= rect.top && y <= rect.bottom;
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}
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const helpers = Object.freeze({
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updateItemsScheduled,
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markSpatialDirtyIfMoved,
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markScheduledItemsMoved,
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trackSpatialEntityMoved,
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updateVisibleWorldRect,
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pointInRect,
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});
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global.TarinaiSimulationRuntime = Object.freeze({
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helpers
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});
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})(typeof window !== "undefined" ? window : globalThis);
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