From 7f0c19becd5979a16d9298cae9f6ff8a6f96d9c2 Mon Sep 17 00:00:00 2001
From: Catalin Mititiuc
Date: Wed, 24 Apr 2024 19:35:42 -0700
Subject: More functional refactor
---
src/modules/game/firingArc.js | 304 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 304 insertions(+)
create mode 100644 src/modules/game/firingArc.js
(limited to 'src/modules/game/firingArc.js')
diff --git a/src/modules/game/firingArc.js b/src/modules/game/firingArc.js
new file mode 100644
index 0000000..d2f18a5
--- /dev/null
+++ b/src/modules/game/firingArc.js
@@ -0,0 +1,304 @@
+// https://www.redblobgames.com/grids/hexagons/
+
+// Horizontal distance between hex centers is sqrt(3) * size. The vertical
+// distance is 3 / 2 * size. When we calculate horzDist / vertDist, the size
+// cancels out, leaving us with a unitless ratio of sqrt(3) / (3 / 2), or
+// 2 * sqrt(3) / 3.
+
+const svgns = "http://www.w3.org/2000/svg",
+ horzToVertDistRatio = 2 * Math.sqrt(3) / 3,
+
+ arcSize = {
+ 'small': Math.atan(horzToVertDistRatio / 6),
+ 'medium': Math.atan(horzToVertDistRatio / 2),
+ 'large': Math.atan(7 * horzToVertDistRatio / 2)
+ },
+
+ firingArcVisibility = {
+ davion: false,
+ liao: false
+ };
+
+let svg;
+
+function calculateAngle(xDiff, yDiff) {
+ yDiff = -yDiff;
+ let angle = Math.abs(Math.atan(yDiff / xDiff));
+
+ if (xDiff < 0 && yDiff > 0) {
+ angle = Math.PI - angle;
+ } else if (xDiff < 0 && yDiff < 0) {
+ angle = Math.PI + angle;
+ } else if (xDiff > 0 && yDiff < 0) {
+ angle = 2 * Math.PI - angle;
+ }
+
+ return angle;
+}
+
+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 x = xIntercept(maxY);
+
+ pointCoords = x <= maxX ? [x, maxY] : [maxX, yIntercept(maxX)];
+ } else if (xDiff > 0 && yDiff < 0) {
+ let y = yIntercept(maxX);
+
+ pointCoords = y >= 0 ? [maxX, y] : [xIntercept(0), 0];
+ } else if (xDiff < 0 && yDiff < 0) {
+ let x = xIntercept(0);
+
+ pointCoords = x >= 0 ? [x, 0] : [0, yIntercept(0)];
+ } else {
+ let y = yIntercept(0);
+
+ pointCoords = y <= maxY ? [0, y] : [xIntercept(maxY), maxY];
+ }
+
+ return pointCoords;
+}
+
+function position(e) {
+ let activeFiringArc = this.querySelector('polygon.firing-arc.active');
+
+ // TODO: handle exactly horizontal and vertical lines
+
+ if (activeFiringArc) {
+ let activeFiringArcOutline = this.querySelector(`#lines polygon[data-number="${activeFiringArc.dataset.number}"][data-allegiance="${activeFiringArc.dataset.allegiance}"]`),
+ board = this.querySelector('#image-maps'),
+ { width, height } = board.getBBox(),
+ pt = new DOMPoint(e.clientX, e.clientY),
+ { x: pointerX, y: pointerY } = pt.matrixTransform(board.getScreenCTM().inverse()),
+ [maxXpx, maxYpx] = [width, height],
+ { x: x1px, y: y1px } = activeFiringArc.points[0];
+
+ let [x2px, y2px] = [
+ pointerX / width * maxXpx,
+ pointerY / height * maxYpx
+ ];
+
+ let xDiff = x2px - x1px;
+ let yDiff = y2px - y1px;
+ let angle = calculateAngle(xDiff, yDiff);
+
+ let arcAngle = arcSize[activeFiringArc.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, newX1] = [y2px + yDelta, x2px + xDelta];
+ let [newY2, newX2] = [y2px - yDelta, x2px - xDelta];
+
+ [newX1, newY1] = edgePoint(x1px, y1px, newX1, newY1, maxXpx, maxYpx);
+ [newX2, newY2] = edgePoint(x1px, y1px, newX2, newY2, maxXpx, maxYpx);
+
+ let oppositeEdgeConditions = [
+ newX1 == 0 && newX2 == maxXpx,
+ newX2 == 0 && newX1 == maxXpx,
+ newY1 == 0 && newY2 == maxYpx,
+ newY2 == 0 && newY1 == maxYpx
+ ]
+
+ let orthogonalEdgeConditions = [
+ (newX1 == 0 || newX1 == maxXpx) && (newY2 == 0 || newY2 == maxYpx),
+ (newX2 == 0 || newX2 == maxXpx) && (newY1 == 0 || newY1 == maxYpx),
+ ]
+
+ let points;
+
+ if (oppositeEdgeConditions.some(e => e)) {
+ let cornerPoints;
+
+ if (xDiff > 0 && yDiff > 0) {
+ if ((newY1 == 0 && newY2 == maxYpx) || (newY1 == maxYpx && newY2 == 0)) {
+ cornerPoints = [[maxXpx, 0], [maxXpx, maxYpx]];
+ } else {
+ cornerPoints = [[maxXpx, maxYpx], [0, maxYpx]];
+ }
+ } else if (xDiff > 0 && yDiff < 0) {
+ if ((newY1 == 0 && newY2 == maxYpx) || (newY1 == maxYpx && newY2 == 0)) {
+ cornerPoints = [[maxXpx, 0], [maxXpx, maxYpx]];
+ } else {
+ cornerPoints = [[0, 0], [maxXpx, 0]];
+ }
+
+ } else if (xDiff < 0 && yDiff > 0) {
+ if ((newY1 == 0 && newY2 == maxYpx) || (newY1 == maxYpx && newY2 == 0)) {
+ cornerPoints = [[0, maxYpx], [0, 0]];
+ } else {
+ cornerPoints = [[maxXpx, maxYpx], [0, maxYpx]];
+ }
+
+ } else {
+ if ((newY1 == 0 && newY2 == maxYpx) || (newY1 == maxYpx && newY2 == 0)) {
+ cornerPoints = [[0, maxYpx], [0, 0]];
+ } else {
+ cornerPoints = [[0, 0], [maxXpx, 0]];
+ }
+
+ }
+ points = `${x1px},${y1px} ${newX1},${newY1} ${cornerPoints[1]} ${cornerPoints[0]} ${newX2},${newY2}`;
+ } else if (orthogonalEdgeConditions.some(e => e)) {
+ let cornerPoints = [];
+ let cp1, cp2;
+
+ if (newX1 == 0 || newX1 == maxXpx) {
+ cp1 = [newX1, yDiff > 0 ? maxYpx : 0];
+ } else {
+ cp1 = [xDiff > 0 ? maxXpx : 0, newY1];
+ }
+
+ if (newX2 == 0 || newX2 == maxXpx) {
+ cp2 = [newX2, yDiff > 0 ? maxYpx : 0];
+ } else {
+ cp2 = [xDiff > 0 ? maxXpx : 0, newY2];
+ }
+
+ if (cp1[0] == cp2[0] && cp1[1] == cp2[1]) {
+ cornerPoints.push(cp1);
+ } else {
+ cornerPoints.push(cp1);
+ cornerPoints.push([xDiff > 0 ? maxXpx : 0, yDiff > 0 ? maxYpx : 0])
+ cornerPoints.push(cp2);
+ }
+
+ points = `${x1px},${y1px} ${newX1},${newY1} ${cornerPoints.join(' ')} ${newX2},${newY2}`;
+ } else {
+ points = `${x1px},${y1px} ${newX1},${newY1} ${newX2},${newY2}`;
+ }
+
+ activeFiringArcOutline.setAttributeNS(null, 'points', points);
+ activeFiringArc.setAttributeNS(null, 'points', points);
+ }
+}
+
+function setDataAttrs({ dataset: { allegiance, number }}, el) {
+ el.dataset.allegiance = allegiance;
+ el.dataset.number = number;
+}
+
+function getClipPathId({ dataset: { allegiance, number }}) {
+ return `clip-path-${allegiance}-${number}`;
+}
+
+function getUnclipped() {
+ return svg.querySelectorAll('#firing-arcs polygon:not([clip-path])');
+};
+
+export default function (el) {
+ svg = el;
+
+ this.set = function (size, counter, { x, y }) {
+ this.get(counter).forEach(fa => fa.remove());
+
+ let arcLayer = svg.querySelector('#shapes');
+ let outlineLayer = svg.querySelector('#lines');
+ let arcContainer = svg.querySelector('#firing-arcs');
+
+ let grid = svg.querySelector('.board');
+ const transform = getComputedStyle(grid).transform.match(/-?\d+\.?\d*/g);
+ const pt = new DOMPoint(x, y);
+ const mtx = new DOMMatrix(transform);
+ let tPt = pt.matrixTransform(mtx);
+
+ let pivotPoint = [tPt.x, tPt.y];
+ let firingArc = document.createElementNS(svgns, 'polygon');
+ let firingArcOutline = document.createElementNS(svgns, 'polygon');
+
+ setDataAttrs(counter, firingArc);
+ firingArc.dataset.size = size;
+ firingArc.classList.add('firing-arc', 'active');
+ firingArc.setAttributeNS(null, 'points', `${pivotPoint} ${pivotPoint} ${pivotPoint}`);
+
+ setDataAttrs(counter, firingArcOutline);
+ firingArcOutline.setAttributeNS(null, 'points', `${pivotPoint} ${pivotPoint} ${pivotPoint}`);
+
+ let clipShape = document.createElementNS(svgns, 'circle');
+ clipShape.setAttributeNS(null, 'cx', tPt.x);
+ clipShape.setAttributeNS(null, 'cy', tPt.y);
+ clipShape.setAttributeNS(null, 'r', 100);
+
+ let clipPath = document.createElementNS(svgns, 'clipPath');
+ setDataAttrs(counter, clipPath);
+ clipPath.setAttributeNS(null, 'id', getClipPathId(counter));
+ clipPath.appendChild(clipShape);
+
+ arcContainer.appendChild(clipPath);
+ arcLayer.appendChild(firingArc);
+ outlineLayer.appendChild(firingArcOutline);
+
+ let firingArcPlacementListener = e => {
+ svg.querySelectorAll('.firing-arc.active').forEach(el => el.classList.remove('active'));
+ grid.removeAttribute('style');
+ svg.removeEventListener('mousemove', position);
+ firingArc.removeEventListener('click', firingArcPlacementListener);
+ firingArc.removeEventListener('contextmenu', cancelFiringArcPlacement);
+ };
+
+ let cancelFiringArcPlacement = e => {
+ e.preventDefault();
+
+ firingArc.removeEventListener('click', firingArcPlacementListener);
+ firingArc.removeEventListener('contextmenu', cancelFiringArcPlacement);
+
+ this.get(counter).forEach(fa => fa.remove());
+
+ grid.removeAttribute('style');
+ svg.removeEventListener('mousemove', position);
+ };
+
+ grid.style.pointerEvents = 'none';
+ svg.addEventListener('mousemove', position);
+ firingArc.addEventListener('click', firingArcPlacementListener);
+ firingArc.addEventListener('contextmenu', cancelFiringArcPlacement);
+ };
+
+ this.clear = function (allegiance) {
+ const selector = `#firing-arcs [data-allegiance="${allegiance}"]`;
+ svg.querySelectorAll(selector).forEach(el => el.remove());
+ };
+
+ this.get = function ({ dataset: { allegiance, number }}) {
+ return svg.querySelectorAll(`#firing-arcs polygon[data-number="${number}"][data-allegiance="${allegiance}"]`);
+ };
+
+ this.toggleVisibility = function (allegiance) {
+ const vis = firingArcVisibility[allegiance],
+ clipPaths = svg.querySelectorAll(`clipPath[data-allegiance="${allegiance}"]`);
+
+ clipPaths.forEach(cp => cp.style.display = !vis ? 'none' : '');
+ firingArcVisibility[allegiance] = !vis;
+ };
+
+ this.toggleCounterVisibility = function ({ dataset: { number, allegiance }}, vis) {
+ const cp = svg.querySelector(`#clip-path-${allegiance}-${number}`),
+ display = vis ? 'none' : '';
+
+ if (cp) {
+ cp.style.display = firingArcVisibility[allegiance] ? 'none' : display;
+ }
+ };
+
+ this.clipAll = function () {
+ console.log('clipall')
+ let unclipped = getUnclipped();
+
+ unclipped.forEach(el => {
+ const { number, allegiance } = el.dataset,
+ clipPathId = `clip-path-${allegiance}-${number}`,
+ isVisible = firingArcVisibility[allegiance];
+
+ if (isVisible) {
+ svg.querySelector(`#${clipPathId}`).style.display = 'none';
+ }
+
+ el.setAttributeNS(null, 'clip-path', `url(#${clipPathId})`);
+ });
+ };
+}
--
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