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Add cubic bezier curve visual debug

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Signed-off-by: Mark Tolmacs <mark@lazycat.hu>
This commit is contained in:
Mark Tolmacs 2025-01-14 10:26:35 +01:00
parent 77ea537c69
commit 028c397c0a
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4 changed files with 85 additions and 8 deletions
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35
excalidraw-app/components/DebugCanvas.tsx
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@ -12,9 +12,10 @@ import {
TrashIcon,
} from "../../packages/excalidraw/components/icons";
import { STORAGE_KEYS } from "../app_constants";
import type { Arc } from "../../packages/math";
import type { Arc, CubicBezier } from "../../packages/math";
import {
isArc,
isBezier,
isSegment,
type GlobalPoint,
type Segment,
@ -35,6 +36,28 @@ const renderLine = (
context.restore();
};
const renderCubicBezier = (
context: CanvasRenderingContext2D,
zoom: number,
{ start, control1, control2, end }: CubicBezier<GlobalPoint>,
color: string,
) => {
context.save();
context.strokeStyle = color;
context.beginPath();
context.moveTo(start[0] * zoom, start[1] * zoom);
context.bezierCurveTo(
control1[0] * zoom,
control1[1] * zoom,
control2[0] * zoom,
control2[1] * zoom,
end[0] * zoom,
end[1] * zoom,
);
context.stroke();
context.restore();
};
const renderArc = (
context: CanvasRenderingContext2D,
zoom: number,
@ -90,6 +113,16 @@ const render = (
el.color,
);
break;
case isBezier(el.data):
renderCubicBezier(
context,
appState.zoom.value,
el.data as CubicBezier<GlobalPoint>,
el.color,
);
break;
default:
throw new Error("Unknown element type");
}
});
};