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refactoring for row based code

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This commit is contained in:
GoteGuru 2022-06-19 00:11:46 +02:00
parent b640f977b9
commit db49f1c924
7 changed files with 50 additions and 21 deletions
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42
utils/graphUtils.js
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@ -37,28 +37,34 @@ function voronoiPoints() {
}
// alternatively generate hex-grid
function hexPoints() {
function hexPointsP() { return hexPoints(true) }
function hexPointsF() { return hexPoints(false) }
const hexRatio = Math.sqrt(3)/2;
function hexPoints(pointy) { // pointy must be 0 or 1
TIME && console.time("hexPoints");
const cellsDesired = +byId("pointsInput").dataset.cells;
const hexRatio = 0.86602540378;
const spacing = rn(Math.sqrt(graphWidth * graphHeight / hexRatio / cellsDesired), 2); // spacing between points
const lineOffset = spacing * hexRatio;
let spacing = rn(Math.sqrt(graphWidth * graphHeight / hexRatio / cellsDesired), 2); // spacing between points
let xSpacing, ySpacing;
if (pointy) {
xSpacing = spacing;
ySpacing = spacing * hexRatio;
} else {
xSpacing = spacing * hexRatio * 2;
ySpacing = spacing / 2 ;
}
const boundary = getBoundaryPoints(graphWidth, graphHeight, spacing);
const cellsX = Math.floor((graphWidth + 0.5 * spacing - 1e-10) / spacing);
const cellsY = Math.floor((graphHeight + 0.5 * lineOffset - 1e-10) / lineOffset);
console.log('desired hexgrid:', cellsX, cellsY);
let points = [];
for (let y = lineOffset / 2, lc = 0 ; y < graphHeight; y += lineOffset, lc++) {
for (let x = lc % 2 ? 0 : spacing / 2; x < graphWidth; x += spacing) {
let rc, lc, x, y;
for (y = ySpacing / 2, lc = 0 ; y < graphHeight; y += ySpacing, lc++) {
for (x = lc % 2 ? 0 : xSpacing / 2, rc=0; x < graphWidth; x += xSpacing, rc++) {
points.push([x, y]);
}
}
TIME && console.timeEnd("hexPoints");
return {spacing, cellsDesired, boundary, points, cellsX, cellsY};
return {spacing, cellsDesired, boundary, points, cellsX: rc, cellsY: lc};
}
// square grid
@ -143,7 +149,19 @@ function getJitteredGrid(width, height, spacing) {
// return cell index on a regular square grid
function findGridCell(x, y, grid) {
return Math.floor(Math.min(y / grid.spacing, grid.cellsY - 1)) * grid.cellsX + Math.floor(Math.min(x / grid.spacing, grid.cellsX - 1));
let xSpacing = grid.spacing;
let ySpacing = grid.spacing * Math.sqrt(3) / 2;
const maxindex = grid.cells.i.length; // safety belt
switch (grid.generator) {
case voronoiPoints:
case squarePoints:
return Math.floor(Math.min(y / grid.spacing, grid.cellsY - 1)) * grid.cellsX + Math.floor(Math.min(x / grid.spacing, grid.cellsX - 1));
case hexPointsF:
xSpacing = grid.spacing * hexRatio;
ySpacing = grid.spacing / 2;
case hexPointsP:
return Math.min(Math.floor(Math.min(y / ySpacing + 1e-10, grid.cellsY - 1)) * grid.cellsX + Math.floor(Math.min(x / xSpacing + 1e-10, grid.cellsX - 1)), maxindex);
}
}
// return array of cell indexes in radius on a regular square grid