sambruk/excalidraw
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Generate new seed on paste

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This commit is contained in:
Christopher Chedeau 2020-01-03 18:29:46 -08:00
parent aad99b3047
commit c077403eec
1 changed files with 6 additions and 1 deletions
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7
src/index.tsx
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@ -22,6 +22,10 @@ let elements = Array.of<ExcalidrawElement>();
const LCG = (seed: number) => () => const LCG = (seed: number) => () =>
((2 ** 31 - 1) & (seed = Math.imul(48271, seed))) / 2 ** 31; ((2 ** 31 - 1) & (seed = Math.imul(48271, seed))) / 2 ** 31;
function randomSeed() {
return Math.floor(Math.random() * 2 ** 31);
}
// Unfortunately, roughjs doesn't support a seed attribute (https://github.com/pshihn/rough/issues/27). // Unfortunately, roughjs doesn't support a seed attribute (https://github.com/pshihn/rough/issues/27).
// We can achieve the same result by overriding the Math.random function with a // We can achieve the same result by overriding the Math.random function with a
// pseudo random generator that supports a random seed and swapping it back after. // pseudo random generator that supports a random seed and swapping it back after.
@ -174,7 +178,7 @@ function newElement(
isSelected: false, isSelected: false,
strokeColor: strokeColor, strokeColor: strokeColor,
backgroundColor: backgroundColor, backgroundColor: backgroundColor,
seed: Math.floor(Math.random() * 2 ** 31), seed: randomSeed(),
draw( draw(
rc: RoughCanvas, rc: RoughCanvas,
context: CanvasRenderingContext2D, context: CanvasRenderingContext2D,
@ -737,6 +741,7 @@ class App extends React.Component<{}, AppState> {
parsedElements.forEach(parsedElement => { parsedElements.forEach(parsedElement => {
parsedElement.x += 10; parsedElement.x += 10;
parsedElement.y += 10; parsedElement.y += 10;
parsedElement.seed = randomSeed();
generateDraw(parsedElement); generateDraw(parsedElement);
elements.push(parsedElement); elements.push(parsedElement);
}); });