Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 1x 1x 1x | import React, { memo } from "react";
import {
isoToScreen,
isoDiamondPoints,
isoOriginX,
isoOriginY,
} from "shared/lib/entities/isoUtils";
interface IsoGridOverlayProps {
/** Scene width in grid tiles. */
mapWidth: number;
/** Scene height in grid tiles. */
mapHeight: number;
/** Full rendered scene size, including any background letterboxing. */
canvasWidth: number;
canvasHeight: number;
}
/**
* SVG overlay that draws the isometric diamond grid for a scene in the editor.
* Rendered as a transparent overlay on top of the background image.
*/
const IsoGridOverlay = memo(
({ mapWidth, mapHeight, canvasWidth, canvasHeight }: IsoGridOverlayProps) => {
const originX = isoOriginX(mapWidth, mapHeight, canvasWidth);
const originY = isoOriginY(mapWidth, mapHeight, canvasHeight);
const polygons: JSX.Element[] = [];
for (let ty = 0; ty < mapHeight; ty++) {
for (let tx = 0; tx < mapWidth; tx++) {
const { x, y } = isoToScreen(tx, ty);
const sx = originX + x;
const sy = originY + y;
polygons.push(
<polygon
key={`${tx}-${ty}`}
points={isoDiamondPoints(sx, sy)}
fill="none"
stroke="rgba(100, 180, 255, 0.35)"
strokeWidth={0.5}
/>,
);
}
}
return (
<svg
style={{
position: "absolute",
top: 0,
left: 0,
width: canvasWidth,
height: canvasHeight,
pointerEvents: "none",
overflow: "visible",
}}
>
{polygons}
</svg>
);
},
);
IsoGridOverlay.displayName = "IsoGridOverlay";
export default IsoGridOverlay;
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