Web Dev Solutions

-const HORZ_POINT_DISTANCE = 1.005,

- VERT_POINT_DISTANCE = Math.sqrt(3) * HORZ_POINT_DISTANCE / 2,

-

- FIRING_ARC_SIZE = {

- 'small': Math.atan(HORZ_POINT_DISTANCE / (6 * VERT_POINT_DISTANCE)),

- 'medium': Math.atan((HORZ_POINT_DISTANCE / 2) / VERT_POINT_DISTANCE),

- 'large': Math.atan((21 * HORZ_POINT_DISTANCE) / (6 * VERT_POINT_DISTANCE))

-};

-

-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 = FIRING_ARC_SIZE[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);

- }

-}

-

-export default class FiringArc {

- #firingArcVisibility = {

- davion: false,

- liao: false

- };

-

- constructor(svg) {

- this.svg = svg;

- }

-

- set(size, { dataset: { allegiance, number }}, { x, y }) {

- const svgns = "http://www.w3.org/2000/svg";

-

- let existingArcs = this.svg.querySelectorAll(

- `#firing-arcs [data-number="${number}"][data-allegiance="${allegiance}"]`

- );

-

- existingArcs.forEach(el => el.remove());

-

- let arcLayer = this.svg.querySelector('#shapes');

- let outlineLayer = this.svg.querySelector('#lines');

- let arcContainer = this.svg.querySelector('#firing-arcs');

-

- let grid = this.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');

-

- firingArc.classList.add('firing-arc', 'active');

- firingArc.dataset.number = number;

- firingArc.dataset.allegiance = allegiance;

- firingArc.dataset.size = size;

- firingArc.setAttributeNS(null, 'points', `${pivotPoint} ${pivotPoint} ${pivotPoint}`);

-

- firingArcOutline.dataset.number = number;

- firingArcOutline.dataset.allegiance = allegiance;

- 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');

- clipPath.setAttributeNS(null, 'id', `clip-path-${allegiance}-${number}`);

- clipPath.dataset.number = number;

- clipPath.dataset.allegiance = allegiance;

- clipPath.appendChild(clipShape);

-

- arcContainer.appendChild(clipPath);

- arcLayer.appendChild(firingArc);

- outlineLayer.appendChild(firingArcOutline);

-

- let firingArcPlacementListener = e => {

- this.svg.querySelectorAll('.firing-arc.active').forEach(el => el.classList.remove('active'));

- grid.removeAttribute('style');

- this.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);

-

- let existingArcs = this.svg.querySelectorAll(

- `#firing-arcs [data-number="${number}"][data-allegiance="${allegiance}"]`

- );

-

- existingArcs.forEach(el => el.remove());

-

- grid.removeAttribute('style');

- this.svg.removeEventListener('mousemove', position);

- };

-

- grid.style.pointerEvents = 'none';

- this.svg.addEventListener('mousemove', position);

- firingArc.addEventListener('click', firingArcPlacementListener);

- firingArc.addEventListener('contextmenu', cancelFiringArcPlacement);

- }

-

- clear(allegiance) {

- const selector = `#firing-arcs [data-allegiance="${allegiance}"]`;

- this.svg.querySelectorAll(selector).forEach(el => el.remove());

- }

-

- get({ dataset: { allegiance, number }}) {

- return this.svg.querySelectorAll(`#firing-arcs polygon[data-number="${number}"][data-allegiance="${allegiance}"]`);

- }

-

- getUnclipped() {

- return this.svg.querySelectorAll('#firing-arcs polygon:not([clip-path])');

- }

-

- toggleVisibility(allegiance) {

- const vis = this.#firingArcVisibility[allegiance],

- clipPaths = this.svg.querySelectorAll(`clipPath[data-allegiance="${allegiance}"]`);

-

- clipPaths.forEach(cp => cp.style.display = !vis ? 'none' : '');

- this.#firingArcVisibility[allegiance] = !vis;

- }

-

- toggleCounterVisibility({ dataset: { number, allegiance }}, vis) {

- const cp = this.svg.querySelector(`#clip-path-${allegiance}-${number}`),

- display = vis ? 'none' : '';

-

- if (cp) {

- cp.style.display = this.#firingArcVisibility[allegiance] ? 'none' : display;

- }

- }

-

- clipAll() {

- let unclipped = this.getUnclipped();

-

- unclipped.forEach(el => {

- const { number, allegiance } = el.dataset,

- clipPathId = `clip-path-${allegiance}-${number}`,

- isVisible = this.#firingArcVisibility[allegiance];

-

- if (isVisible) {

- this.svg.querySelector(`#${clipPathId}`).style.display = 'none';

- }

-

- el.setAttributeNS(null, 'clip-path', `url(#${clipPathId})`);

- });

- }

-}