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WIP: draw firing arc cone lines to map edge

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This commit is contained in:
Catalin Constantin Mititiuc 2025-06-16 22:41:28 -07:00
parent 46717cd9a0
commit ec218f8940
3 changed files with 110 additions and 76 deletions
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11
index.html
View File

@ -32,7 +32,16 @@
<rect id="map" x="0" y="0" width="34in" height="23in" />
</svg>
<button id="set-firing-arc">Set Firing Arc</button>
Set firing arc:
<button type="button" class="set-firing-arc" data-size="small">
<img src="firing_arc_small.png" height="12" /> 2 MP
</button>
<button type="button" class="set-firing-arc" data-size="medium">
<img src="firing_arc_medium.png" height="12" /> 4 MP
</button>
<button type="button" class="set-firing-arc" data-size="large">
<img src="firing_arc_large.png" height="12" /> 6 MP
</button>
<div id="record-sheet">
<div>

158
index.js
View File

@ -1,6 +1,6 @@
var isEven = n => n % 2 === 0;
var toFixed = n => Number.parseFloat(n).toFixed(2);
var radToDeg = radians => radians * 180 / Math.PI;
let isEven = n => n % 2 === 0;
let toFixed = n => Number.parseFloat(n).toFixed(2);
let radToDeg = radians => radians * 180 / Math.PI;
let getPointCoords = (x, y) => {
let point = document.querySelector(`[data-x="${x}"][data-y="${y}"]`);
@ -8,23 +8,77 @@ let getPointCoords = (x, y) => {
return [point.x.baseVal.value, point.y.baseVal.value]
};
var svgns = "http://www.w3.org/2000/svg",
let svgns = "http://www.w3.org/2000/svg",
svg = document.querySelector('svg'),
rect = document.querySelector('rect#map');
var columnCount = 33,
let columnCount = 33,
rowCount = 25,
pointDistanceInInches = 1.005;
var columns = [...Array(columnCount).keys()],
let columns = [...Array(columnCount).keys()],
rows = [...Array(rowCount).keys()],
points = rows.map(y => columns.map(x => [x, y]));
var xOffset = 0.25,
let xOffset = 0.25,
yOffset = 0.45;
calcY = Math.sqrt(3) * pointDistanceInInches / 2,
alternatingOffset = pointDistanceInInches / 2;
let firingArcSize = {
'small': Math.atan(pointDistanceInInches / (6 * calcY)),
'medium': Math.atan((pointDistanceInInches / 2) / calcY),
'large': Math.atan((21 * pointDistanceInInches) / (6 * calcY))
}
function edgePoint(x1, y1, x2, y2, maxX, maxY) {
let pointCoords,
xDiff = x2 - x1,
yDiff = y2 - y1,
xIntercept = y => (y - y1) * (xDiff) / (yDiff) + x1,
yIntercept = x => (x - x1) * (yDiff) / (xDiff) + y1;
if (xDiff > 0 && yDiff > 0) {
let yWhenXisMax = yIntercept(maxX);
let xWhenYisMax = xIntercept(maxY);
if (xWhenYisMax <= maxX) {
pointCoords = [xWhenYisMax, maxY];
} else {
pointCoords = [maxX, yWhenXisMax];
}
} else if (xDiff > 0 && yDiff < 0) {
let yWhenXisMax = yIntercept(maxX);
let xWhenYisZero = xIntercept(0);
if (xWhenYisZero <= maxX) {
pointCoords = [xWhenYisZero, 0];
} else {
pointCoords = [maxX, yWhenXisMax];
}
} else if (xDiff < 0 && yDiff < 0) {
let yWhenXisZero = yIntercept(0);
let xWhenYisZero = xIntercept(0);
if (yWhenXisZero >= 0) {
pointCoords = [0, yWhenXisZero];
} else {
pointCoords = [xWhenYisZero, 0];
}
} else {
let yWhenXisZero = yIntercept(0);
let xWhenYisMax = xIntercept(maxY);
if (yWhenXisZero <= maxY) {
pointCoords = [0, yWhenXisZero];
} else {
pointCoords = [xWhenYisMax, maxY];
}
}
return pointCoords;
}
rect.addEventListener('mousemove', e => {
var rect = e.target.getBoundingClientRect();
var x = e.clientX - rect.left;
@ -34,16 +88,14 @@ rect.addEventListener('mousemove', e => {
// console.log('x', `${toFixed(x / rect.width * maxX)}"`, 'y', `${toFixed(y / rect.height * maxY)}"`);
let aim = document.querySelector('.firing-arc.active');
let aim = document.querySelector('line.firing-arc.active');
let p = document.querySelector('polyline.firing-arc.active');
// TODO: handle horizontal and vertical lines
if (aim || p) {
if (aim && p) {
let xIntercept = y => (y - y1) * (x2 - x1) / (y2 - y1) + x1;
let yIntercept = x => (x - x1) * (y2 - y1) / (x2 - x1) + y1;
let xInterceptPx = y => (y - y1px) * (x2px - x1px) / (y2px - y1px) + x1px;
let yInterceptPx = x => (x - x1px) * (y2px - y1px) / (x2px - x1px) + y1px;
let newX, newY;
let [x1, y1] = [aim.x1, aim.y1].map(v => v.baseVal.valueInSpecifiedUnits);
@ -52,52 +104,6 @@ rect.addEventListener('mousemove', e => {
let {x: x1px, y: y1px} = p.points[1];
let [x2px, y2px] = [x / rect.width * maxXpx, y / rect.height * maxYpx];
if (x2px - x1px > 0 && y2px - y1px > 0) {
let yWhenXisMax = yInterceptPx(maxXpx);
let xWhenYisMax = xInterceptPx(maxYpx);
if (xWhenYisMax <= maxXpx) {
newX = xWhenYisMax;
newY = maxYpx;
} else {
newX = maxXpx;
newY = yWhenXisMax;
}
} else if (x2px - x1px > 0 && y2px - y1px < 0) {
let yWhenXisMax = yInterceptPx(maxXpx);
let xWhenYisZero = xInterceptPx(0);
if (xWhenYisZero <= maxXpx) {
newX = xWhenYisZero;
newY = 0;
} else {
newX = maxXpx;
newY = yWhenXisMax;
}
} else if (x2px - x1px < 0 && y2px - y1px < 0) {
let yWhenXisZero = yInterceptPx(0);
let xWhenYisZero = xInterceptPx(0);
if (yWhenXisZero >= 0) {
newX = 0;
newY = yWhenXisZero;
} else {
newX = xWhenYisZero;
newY = 0;
}
} else {
let yWhenXisZero = yInterceptPx(0);
let xWhenYisMax = xInterceptPx(maxYpx);
if (yWhenXisZero <= maxYpx) {
newX = 0;
newY = yWhenXisZero;
} else {
newX = xWhenYisMax;
newY = maxYpx;
}
}
let width = x2px - x1px;
let height = -(y2px - y1px);
let angle = Math.abs(Math.atan(height / width));
@ -113,28 +119,26 @@ rect.addEventListener('mousemove', e => {
angle = 2 * Math.PI - angle;
}
console.log('angle', angle, 'degrees', radToDeg(angle));
let smlArcAngle = Math.atan(pointDistanceInInches / (6 * calcY));
let medArcAngle = Math.atan((pointDistanceInInches / 2) / calcY);
let lrgArcAngle = Math.atan((21 * pointDistanceInInches) / (6 * calcY));
let arcAngle = lrgArcAngle;
console.log('angle:', `${toFixed(radToDeg(angle))}\u00B0`, `${angle}rad`);
let arcAngle = firingArcSize[p.dataset.size];
let distance = Math.sqrt((x2px - x1px)**2 + (y2px - y1px)**2);
let yDelta = distance * Math.cos(angle) * Math.tan(arcAngle);
let xDelta = distance * Math.sin(angle) * Math.tan(arcAngle);
let newY1 = y2px + (distance * Math.cos(angle)) * Math.tan(arcAngle);
let newY2 = y2px - (distance * Math.cos(angle)) * Math.tan(arcAngle);
let newY1 = y2px + yDelta;
let newX1 = x2px + xDelta;
let newX1 = x2px + (distance * Math.sin(angle)) * Math.tan(arcAngle);
let newX2 = x2px - (distance * Math.sin(angle)) * Math.tan(arcAngle);
let newY2 = y2px - yDelta;
let newX2 = x2px - xDelta;
[newX1, newY1] = edgePoint(x1px, y1px, newX1, newY1, maxXpx, maxYpx);
[newX2, newY2] = edgePoint(x1px, y1px, newX2, newY2, maxXpx, maxYpx);
// p.setAttributeNS(null, 'points', `${newX},${newY} ${x1px},${y1px} ${newX},${newY}`);
// p.setAttributeNS(null, 'points', `${x2px},${y2px} ${x1px},${y1px} ${x2px},${y2px}`);
p.setAttributeNS(null, 'points', `${newX1},${newY1} ${x1px},${y1px} ${newX2},${newY2}`);
// console.log(p);
if (x2 - x1 > 0 && y2 - y1 > 0) {
let yWhenXisMax = yIntercept(maxX);
let xWhenYisMax = xIntercept(maxY);
@ -217,17 +221,19 @@ document.querySelectorAll('.soldier-record').forEach(el =>
})
);
document.querySelector('#set-firing-arc').addEventListener('click', e => {
document.querySelectorAll('.set-firing-arc').forEach(el => el.addEventListener('click', e => {
let selectedSoldier = document.querySelector('.soldier-record.selected');
if (selectedSoldier) {
let {troopNumber, troopAllegiance} = selectedSoldier.dataset;
let existingArc = document.querySelector(
let existingArcs = document.querySelectorAll(
`.firing-arc[data-troop-number="${troopNumber}"][data-troop-allegiance="${troopAllegiance}"]`
);
if (existingArc) { existingArc.remove() }
if (existingArcs.length > 0) {
existingArcs.forEach(el => el.remove());
}
let counter = document.querySelector(
`circle.counter[data-troop-number="${troopNumber}"][data-troop-allegiance="${troopAllegiance}"]`
@ -238,6 +244,7 @@ document.querySelector('#set-firing-arc').addEventListener('click', e => {
aim.classList.add('firing-arc', 'active');
aim.dataset.troopNumber = troopNumber;
aim.dataset.troopAllegiance = troopAllegiance;
aim.dataset.size = e.target.dataset.size;
aim.setAttributeNS(null, 'x1', counter.cx.baseVal.valueAsString);
aim.setAttributeNS(null, 'y1', counter.cy.baseVal.valueAsString);
aim.setAttributeNS(null, 'x2', counter.cx.baseVal.valueAsString);
@ -256,13 +263,14 @@ document.querySelector('#set-firing-arc').addEventListener('click', e => {
firingArc.classList.add('firing-arc', 'active');
firingArc.dataset.troopNumber = troopNumber;
firingArc.dataset.troopAllegiance = troopAllegiance;
firingArc.dataset.size = e.target.dataset.size;
firingArc.setAttributeNS(null, 'points', `${pivotPoint} ${pivotPoint} ${pivotPoint}`);
svg.appendChild(firingArc);
document.querySelector('circle#point').style.display = 'none';
}
});
}));
points.forEach((row, index) => row.forEach(([x, y]) => {
var cx = x * pointDistanceInInches + xOffset + (isEven(index) ? alternatingOffset : 0),
@ -310,7 +318,7 @@ points.forEach((row, index) => row.forEach(([x, y]) => {
}));
let smlArc = document.createElementNS(svgns, 'polygon');
smlArc.setAttributeNS(null, 'id', 'small-arc');
smlArc.setAttributeNS(null, 'id', 'sml-arc');
let smlArcPoints = `${getPointCoords(1, 24)} ${getPointCoords(1, 21)} ${getPointCoords(2, 21)}`;
smlArc.setAttributeNS(null, 'points', smlArcPoints);

17
style.css
View File

@ -37,6 +37,11 @@ polygon {
opacity: 0.33;
}
button.set-firing-arc img {
vertical-align: middle;
pointer-events: none;
}
line.firing-arc {
stroke: none;
/* transform: scale(2); */
@ -48,6 +53,18 @@ polyline.firing-arc {
fill: none;
}
polygon#sml-arc {
fill: red;
}
polygon#med-arc {
fill: blue;
}
polygon#lrg-arc {
fill: green;
}
image#img1 {
transform: scale(3.41) rotate(-0.15deg);
/* opacity: 0.33; */