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fix(canvas): 画布空间网格 - 修复点/线网格过淡不可见

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dlh
2026-08-20 18:49:01 +08:00
parent b82322a877
commit a95ff6f0d0
3 changed files with 14 additions and 8 deletions
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8
web/src/lib/canvas/canvas-live-viewport.ts
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@@ -4,6 +4,12 @@ export const CANVAS_VIEWPORT_PREVIEW_EVENT = "canvas:viewport-preview";
export const CANVAS_GRAPHICS_VIEWPORT_PREVIEW_EVENT = "canvas:graphics-viewport-preview";
export const CANVAS_SELECTION_PREVIEW_EVENT = "canvas:selection-preview";
// 空间网格点模式的点半径（像素单位）。远距（缩放 < 0.12）时用更小半径避免糊成一团。
// 同时被 <CanvasGrid>（infinite-canvas）与滚动同步（applyCanvasLiveViewport）共享，避免两处漂移。
export function canvasDotPx(scale: number): string {
return scale < 0.12 ? "1.2px" : "2px";
}
export function applyCanvasLiveViewport(container: HTMLDivElement | null, viewport: ViewportTransform, notify = true) {
if (!container) return;
const gridSize = 48 * viewport.k;
@@ -17,7 +23,7 @@ export function applyCanvasLiveViewport(container: HTMLDivElement | null, viewpo
container.style.setProperty("--canvas-grid-size", `${gridSize}px`);
container.style.setProperty("--canvas-grid-x", `${viewport.x % gridSize}px`);
container.style.setProperty("--canvas-grid-y", `${viewport.y % gridSize}px`);
container.style.setProperty("--canvas-dot-size", viewport.k < 0.12 ? "0.8px" : "1.15px");
container.style.setProperty("--canvas-dot-size", canvasDotPx(viewport.k));
// 图形层必须逐帧跟随 DOM 世界层；浮层和滚动通知仍可按原频率节流。
container.dispatchEvent(new CustomEvent<ViewportTransform>(CANVAS_GRAPHICS_VIEWPORT_PREVIEW_EVENT, { detail: viewport }));
if (notify) {