1 files changed, 1118 insertions, 0 deletions
diff --git a/src/index.js b/src/index.js
new file mode 100644
index 0000000..66e554f
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,1118 @@
+function isEven(n) {
+  return n % 2 === 0;
+}
+
+function radToDeg(radians) {
+  return radians * 180 / Math.PI;
+}
+
+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 evenr_to_axial(x, y) {
+  return {q: x - (y + (y & 1)) / 2, r: y};
+}
+
+function axial_to_evenr(q, r) {
+  return {x: q + (r + (r & 1)) / 2, y: r};
+}
+
+function axial_distance(q1, r1, q2, r2) {
+  return (Math.abs(q1 - q2) + Math.abs(q1 + r1 - q2 - r2) + Math.abs(r1 - r2)) / 2;
+}
+
+function offset_distance(x1, y1, x2, y2) {
+  let { q: q1, r: r1 } = evenr_to_axial(x1, y1),
+      { q: q2, r: r2 } = evenr_to_axial(x2, y2);
+
+  return axial_distance(q1, r1, q2, r2);
+}
+
+function cube_to_axial(q, r, s) {
+  return { q: q, r: r };
+}
+
+function axial_to_cube(q, r) {
+  return { q: q, r: r, s: -q - r};
+}
+
+function cube_round(q, r, s) {
+  rQ = Math.round(q);
+  rR = Math.round(r);
+  rS = Math.round(s);
+
+  let q_diff = Math.abs(rQ - q),
+      r_diff = Math.abs(rR - r),
+      s_diff = Math.abs(rS - s);
+
+  if (q_diff > r_diff && q_diff > s_diff) {
+    rQ = -rR - rS;
+  } else if (r_diff > s_diff) {
+    rR = -rQ - rS;
+  } else {
+    rS = -rQ - rR;
+  }
+
+  return {q: rQ, r: rR, s: rS};
+}
+
+function axial_round(q, r) {
+  let cube = axial_to_cube(q, r),
+      round = cube_round(cube.q, cube.r, cube.s),
+      axial = cube_to_axial(round.q, round.r, round.s);
+
+  return {q: axial.q, r: axial.r};
+}
+
+function lerp(a, b, t) {
+  return a + (b - a) * t;
+}
+
+function axial_lerp(q1, r1, q2, r2, t) {
+  return { q: lerp(q1, q2, t), r: lerp(r1, r2, t) };
+}
+
+function linedraw(x1, y1, x2, y2) {
+  let axial1 = evenr_to_axial(x1, y1),
+      axial2 = evenr_to_axial(x2, y2),
+      n = offset_distance(x1, y1, x2, y2),
+      results = [];
+
+  for (let i = 0; i <= n; i++) {
+    let lerp = axial_lerp(axial1.q, axial1.r, axial2.q, axial2.r, 1.0 / n * i),
+        round = axial_round(lerp.q, lerp.r),
+        { x, y } = axial_to_evenr(round.q, round.r);
+
+    results.push([x, y]);
+  }
+
+  return results;
+}
+
+window.addEventListener('load', () => {
+  const svgns = "http://www.w3.org/2000/svg",
+        // svg = document.querySelector('svg'),
+        svg = document.querySelector('object').contentDocument.querySelector('svg'),
+        hex = svg.querySelector('#point'),
+        ptGrp = svg.querySelector('#points'),
+        cntrGrp = svg.querySelector('#counters'),
+        settingsPanel = document.getElementById('panel'),
+        recordSheetVisibility = document.querySelector('#content input[type="checkbox"].visible');
+
+  const q = s => document.querySelector(s),
+        qA = s => document.querySelectorAll(s);
+
+  const { x: VIEWBOX_X, y: VIEWBOX_Y, width: VIEWBOX_WIDTH, height: VIEWBOX_HEIGHT } =
+    svg.viewBox.baseVal;
+
+  const COLUMN_COUNT = 33,
+        ROW_COUNT = 51,
+  // const COLUMN_COUNT = 20,
+  //       ROW_COUNT = 20,
+        HORZ_POINT_DISTANCE = 1.005,
+        VERT_POINT_DISTANCE = Math.sqrt(3) * HORZ_POINT_DISTANCE / 2,
+        ALTERNATING_OFFSET = HORZ_POINT_DISTANCE / 2,
+        CIRCUMRADIUS = Math.max(...[...new Set(Object.values(hex.points).flatMap(({x, y}) => [x, y]))]),
+        INRADIUS = CIRCUMRADIUS * Math.sqrt(3) / 2,
+        [COLUMNS, ROWS] = [COLUMN_COUNT, ROW_COUNT].map(n => [...Array(n).keys()]),
+        POINTS = ROWS.map(y => COLUMNS.map(x => [x, y]));
+
+  const 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 positionFiringArc(e) {
+    let activeFiringArc = svg.querySelector('polygon.firing-arc.active');
+
+    // TODO: handle exactly horizontal and vertical lines
+
+    if (activeFiringArc) {
+      let activeFiringArcOutline = svg.querySelector(`#lines polygon[data-troop-number="${activeFiringArc.dataset.troopNumber}"][data-troop-allegiance="${activeFiringArc.dataset.troopAllegiance}"]`);
+          board = svg.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);
+    }
+  }
+
+  let prevVb = localStorage.getItem('viewBox');
+
+  if (prevVb) {
+    svg.setAttributeNS(null, 'viewBox', prevVb);
+  }
+
+  let info = document.getElementById('status');
+
+  // Object.values(settingsPanel.querySelectorAll('fieldset')).forEach(fieldset => {
+  //   const identityMtx = [1, 0, 0, 1, 0, 0];
+  //   const target = document.getElementById(fieldset.name);
+  //   const transform = getComputedStyle(target).transform.match(/-?\d+\.?\d*/g) || identityMtx;
+  //   const inputs = fieldset.querySelectorAll('input');
+
+  //   if (transform) {
+  //     const [a, b, c, d, e, f] = transform.map(n => parseFloat(n));
+
+  //     // a c e
+  //     // b d f
+
+  //     const scaleX = Math.sqrt(a**2 + c**2);
+  //     const scaleY = Math.sqrt(b**2 + d**2);
+
+  //     let values = {
+  //       scaleX: Math.round(scaleX * 1000) / 1000,
+  //       scaleY: Math.round(scaleY * 1000) / 1000,
+  //       translateX: e,
+  //       translateY: f,
+  //       rotate: Math.round(radToDeg((Math.acos(a / scaleX) + Math.asin(b / scaleY)) / 2) * 10) / 10
+  //     }
+
+  //     inputs.forEach(input => input.value = values[input.name]);
+  //   }
+
+  //   inputs.forEach(input => {
+  //     input.addEventListener('pointerenter', e => e.target.focus());
+
+  //     input.addEventListener('input', e => {
+  //       let { translateX, translateY, rotate, scaleX, scaleY } =
+  //         Object.values(inputs).reduce((acc, input) => {
+  //           acc[input.name] = input.value;
+  //           return acc;
+  //         }, {});
+
+  //       let transform = `translate(${translateX}px, ${translateY}px) rotate(${rotate}deg) scale(${scaleX}, ${scaleY})`;
+  //       target.style.transform = transform;
+  //     });
+
+  //     input.addEventListener('pointerleave', () => document.activeElement.blur());
+  //   });
+  // });
+
+  const grid = svg.querySelector('#grid');
+
+  const Counter = new function() {
+    let container = ptGrp,
+        selectedClass = 'selected',
+
+        dataSelector = function(troopNumber, allegiance) {
+          return `[data-troop-number="${troopNumber}"][data-troop-allegiance="${allegiance}"]`;
+        },
+
+        selector = function(troopNumber, allegiance) {
+          return `use.counter${dataSelector(troopNumber, allegiance)}`;
+        },
+
+        position = function(x, y) {
+          return `g[data-x="${x}"][data-y="${y}"]`;
+        },
+
+        counterPosition = function(x, y) {
+          return `use.counter[data-x="${x}"][data-x="${y}"]`;
+        },
+
+        traceSelector = function(troopNumber, allegiance) {
+          return `polyline.move-trace${dataSelector(troopNumber, allegiance)}`;
+        },
+
+        clickClone = function() {
+          let { troopNumber, troopAllegiance, x, y } = this.dataset,
+              [xAttr, yAttr] = this.parentElement.getAttribute('transform').match(/-?\d+\.?\d*/g);
+
+          if (Counter.isSelected(troopNumber, troopAllegiance)) {
+            let trace = grid.querySelector(traceSelector(troopNumber, troopAllegiance)),
+                points = trace.getAttribute('points').split(' ');
+
+            if (`${xAttr},${yAttr}` == points.at(0)) {
+              let counter = Counter.get(troopNumber, troopAllegiance);
+              counter.setAttributeNS(null, 'x', 0);
+              counter.setAttributeNS(null, 'y', 0);
+              counter.dataset.x = x;
+              counter.dataset.y = y;
+              container.querySelector(`g[data-x="${x}"][data-y="${y}"]`).appendChild(counter);
+
+              Counter.removeClones(this);
+              trace.remove();
+            } else {
+              points = points.filter(p => p != `${xAttr},${yAttr}`).join(' ');
+
+              trace.setAttributeNS(null, 'points', points);
+            }
+
+            this.remove();
+          }
+        },
+
+        pointerOver = function() {
+          let { troopNumber, troopAllegiance } = this.dataset;
+              cp = svg.querySelector(`#clip-path-${troopAllegiance}-${troopNumber}`);
+
+          if (cp) {
+            cp.style.display = 'none';
+          }
+        },
+
+        pointerOut = function() {
+          let { troopNumber, troopAllegiance } = this.dataset;
+              cp = svg.querySelector(`#clip-path-${troopAllegiance}-${troopNumber}`);
+
+          if (cp) {
+            let isVisible =
+              document
+                .getElementById('toggle-firing-arc-vis')
+                .querySelector(`input[data-allegiance="${troopAllegiance}"]`)
+                .checked;
+
+            cp.style.display = isVisible ? 'none' : '';
+          }
+        },
+
+        click = function() {
+          if (this.classList.contains(selectedClass)) {
+            let { troopNumber, troopAllegiance } = this.dataset,
+                trace = grid.querySelector(traceSelector(troopNumber, troopAllegiance));
+
+            if (trace) {
+              let points = trace.getAttribute('points').split(' '),
+                  [xAttr, yAttr] = points.at(-2).split(','),
+                  clone = container.querySelector(`g[transform="translate(${xAttr} ${yAttr})"] ${dataSelector(troopNumber, troopAllegiance)}.clone`);
+
+              points.pop();
+
+              if (points.length >= 2) {
+                trace.setAttributeNS(null, 'points', points.join(' '));
+              } else {
+                trace.remove();
+              }
+
+              this.setAttributeNS(null, 'x', clone.getAttribute('x'));
+              this.setAttributeNS(null, 'y', clone.getAttribute('y'));
+              this.dataset.x = clone.dataset.x;
+              this.dataset.y = clone.dataset.y;
+
+              container.querySelector(`g[data-x="${this.dataset.x}"][data-y="${this.dataset.y}"]`).appendChild(this);
+
+              clone.remove();
+            }
+          }
+        },
+
+        dblClick = function() {
+          if (this.classList.contains(selectedClass)) {
+            let { troopNumber, troopAllegiance } = this.dataset,
+                trace = grid.querySelector(traceSelector(troopNumber, troopAllegiance));
+
+            if (!trace) {
+              Counter.remove(this);
+              svg.querySelectorAll(`#firing-arcs ${dataSelector(troopNumber, troopAllegiance)}`).forEach(el => el.remove());
+            }
+          }
+        };
+
+    this.get = function(troopNumber, allegiance) {
+      return container.querySelector(`${selector(troopNumber, allegiance)}:not(.clone)`);
+    };
+
+    this.getAt = function(x, y) {
+      return container.querySelector(`${counterPosition(x, y)}:not(.clone)`);
+    };
+
+    this.select = function({ dataset: { troopNumber, troopAllegiance }}) {
+      this.unSelect();
+
+      let counter = container.querySelector(`${selector(troopNumber, troopAllegiance)}:not(.clone)`);
+
+      if (counter) {
+        counter.classList.add(selectedClass);
+      }
+    };
+
+    this.unSelect = function() {
+      let selected = container.querySelector(`.${selectedClass}`);
+
+      if (selected) {
+        let { troopNumber, troopAllegiance } = selected.dataset;
+
+        selected.classList.remove(selectedClass);
+        selected.removeAttribute('style');
+
+        container
+          .querySelectorAll(`${selector(troopNumber, troopAllegiance)}.clone`)
+          .forEach(el => el.removeAttribute('style'));
+      }
+    };
+
+    this.isSelected = function(troopNumber, allegiance) {
+      return container.querySelector(`${selector(troopNumber, allegiance)}.${selectedClass}`) !== null;
+    };
+
+    this.place = function({ dataset: { troopNumber, troopAllegiance }}, point) {
+      let counter, points,
+          counterNodeList = container.querySelectorAll(selector(troopNumber, troopAllegiance));
+
+      if (counterNodeList.length > 0) {
+        let counters = Array.from(counterNodeList),
+            original = counters.find(el => !el.classList.contains('clone')),
+            trace = grid.querySelector(traceSelector(troopNumber, troopAllegiance));
+
+        // let ptContainers = counters.map(c => ptGrp.querySelector(position(c.dataset.x, c.dataset.y)));
+
+        let current = {
+              x: point.dataset.x,
+              y: point.dataset.y,
+              // xAttr: point.getAttribute('x'),
+              // yAttr: point.getAttribute('y'),
+              transform: container.querySelector(position(point.dataset.x, point.dataset.y)).getAttribute('transform')
+            },
+            previous = {
+              x: original.dataset.x,
+              y: original.dataset.y,
+              // xAttr: original.getAttribute('x'),
+              // yAttr: original.getAttribute('y'),
+              transform: container.querySelector(position(original.dataset.x, original.dataset.y)).getAttribute('transform')
+            };
+
+        [current.xAttr, current.yAttr] = current.transform.match(/-?\d+\.?\d*/g);
+        [previous.xAttr, previous.yAttr] = previous.transform.match(/-?\d+\.?\d*/g);
+
+        counter = original.cloneNode();
+        counter.setAttributeNS(null, 'x', 0);
+        counter.setAttributeNS(null, 'y', 0);
+        counter.dataset.x = previous.x;
+        counter.dataset.y = previous.y;
+        counter.classList.remove(selectedClass);
+        counter.classList.add('clone');
+
+        original.setAttributeNS(null, 'x', 0);
+        original.setAttributeNS(null, 'y', 0);
+        original.dataset.x = current.x;
+        original.dataset.y = current.y;
+
+        container.querySelector(`g[data-x="${current.x}"][data-y="${current.y}"]`).appendChild(original);
+
+        if (!trace) {
+          trace = document.createElementNS(svgns, 'polyline');
+          points = `${previous.xAttr},${previous.yAttr} ${current.xAttr},${current.yAttr}`;
+
+          trace.dataset.troopNumber = troopNumber;
+          trace.dataset.troopAllegiance = troopAllegiance;
+          trace.classList.add('move-trace');
+
+          grid.prepend(trace)
+          // container.prepend(trace);
+        } else {
+          points = `${trace.getAttribute('points')} ${current.xAttr},${current.yAttr}`;
+        }
+
+        trace.setAttributeNS(null, 'points', points);
+        counter.addEventListener('click', clickClone);
+      } else {
+        counter = document.createElementNS(svgns, 'use'),
+
+        counter.setAttributeNS(null, 'href', `#${troopAllegiance}-${troopNumber}`);
+        counter.classList.add('counter', 'selected');
+        counter.setAttributeNS(null, 'x', point.getAttribute('x'));
+        counter.setAttributeNS(null, 'y', point.getAttribute('y'));
+        counter.dataset.troopNumber = troopNumber;
+        counter.dataset.troopAllegiance = troopAllegiance;
+        counter.dataset.x = point.dataset.x;
+        counter.dataset.y = point.dataset.y;
+        counter.style.pointerEvents = 'auto';
+
+        counter.addEventListener('pointerover', pointerOver);
+        counter.addEventListener('pointerout', pointerOut);
+        counter.addEventListener('click', click);
+        counter.addEventListener('dblclick', dblClick);
+      }
+
+      container.querySelector(`g[data-x="${counter.dataset.x}"][data-y="${counter.dataset.y}"]`).appendChild(counter);
+
+      // container.appendChild(counter);
+    };
+
+    this.remove = function({ dataset: { troopNumber, troopAllegiance }}) {
+      container
+        .querySelectorAll(dataSelector(troopNumber, troopAllegiance))
+        .forEach(el => el.remove());
+    };
+
+    this.removeClones = function({ dataset: { troopNumber, troopAllegiance }}) {
+      container
+        .querySelectorAll(`${selector(troopNumber, troopAllegiance)}.clone`)
+        .forEach(el => el.remove());
+    };
+
+    this.endMove = function(el) {
+      let { troopNumber, troopAllegiance } = el.dataset;
+      let trace = grid.querySelector(traceSelector(troopNumber, troopAllegiance));
+
+      if (trace) {
+        trace.remove();
+      }
+
+      Counter.removeClones(el);
+    };
+
+    this.hasProne = function(troopNumber, troopAllegiance) {
+      let selector = `g#${troopAllegiance}-${troopNumber} use[href="#counter-prone"]`;
+
+      return !!svg.querySelector(selector);
+    };
+  };
+
+  const RecordSheet = new function() {
+    let clipUnclippedFiringArcs = function() {
+      let unclipped = svg.querySelectorAll('#firing-arcs polygon:not([clip-path])');
+
+      unclipped.forEach(el => {
+        let { troopNumber, troopAllegiance } = el.dataset,
+            clipPathId = `clip-path-${troopAllegiance}-${troopNumber}`;
+
+        let isVisible =
+          document
+            .getElementById('toggle-firing-arc-vis')
+            .querySelector(`input[data-allegiance="${troopAllegiance}"]`)
+            .checked;
+
+        if (isVisible) {
+          svg.querySelector(`#${clipPathId}`).style.display = 'none';
+        }
+
+        el.setAttributeNS(null, 'clip-path', `url(#${clipPathId})`);
+      });
+    };
+
+    this.unSelect = function() {
+      let selected = this.getSelected();
+
+      if (selected) {
+        selected.classList.remove('selected');
+        document.getElementById('toggle-prone-counter').checked = false;
+      }
+
+      clipUnclippedFiringArcs();
+      Counter.unSelect();
+    };
+
+    this.getSelected = function() {
+      return document.querySelector('.soldier-record.selected');
+    };
+
+    this.select = function(el) {
+      let { troopNumber, troopAllegiance } = el.dataset,
+          proneStatus = Counter.hasProne(troopNumber, troopAllegiance);
+
+      RecordSheet.unSelect();
+      document.querySelector(`#record-sheet .soldier-record[data-troop-number="${troopNumber}"][data-troop-allegiance="${troopAllegiance}"]`).classList.add('selected');
+      document.getElementById('toggle-prone-counter').checked = proneStatus;
+      existingArcs = svg.querySelectorAll(`#firing-arcs polygon[data-troop-number="${troopNumber}"][data-troop-allegiance="${troopAllegiance}"]`);
+      existingArcs.forEach(el => el.removeAttribute('clip-path'));
+    };
+  };
+
+  const SightLine = new function() {
+    this.clear = function() {
+      let sl = grid.querySelector('line.sight-line');
+      let target = grid.querySelector(`use[href="#point"].sight-line-target`);
+
+      if (sl) {
+        sl.remove();
+      }
+
+      if (target) {
+        target.classList.remove('sight-line-target');
+      }
+
+      this.clearHexes();
+    };
+
+    this.clearHexes = function() {
+      ptGrp.querySelectorAll('use[href="#point"].active').forEach(el => el.classList.remove('active'));
+    };
+
+    this.draw = function(x1, y1, x2, y2) {
+      let source = ptGrp.querySelector(`g[data-x="${x1}"][data-y="${y1}"]`),
+          target = ptGrp.querySelector(`g[data-x="${x2}"][data-y="${y2}"]`),
+
+          [slX1, slY1] = source.getAttribute('transform').match(/-?\d+\.?\d*/g),
+          [slX2, slY2] = target.getAttribute('transform').match(/-?\d+\.?\d*/g),
+
+          sightLine = document.createElementNS(svgns, 'line');
+
+      sightLine.classList.add('sight-line');
+      sightLine.classList.add('active');
+      sightLine.setAttributeNS(null, 'x1', slX1);
+      sightLine.setAttributeNS(null, 'y1', slY1);
+      sightLine.setAttributeNS(null, 'x2', slX2);
+      sightLine.setAttributeNS(null, 'y2', slY2);
+
+      grid.appendChild(sightLine);
+
+      let coords = [x1, y1, x2, y2];
+      this.drawHexes(...coords);
+    };
+
+    this.drawHexes = function(...coords) {
+      this.clearHexes()
+
+      info.querySelector('#hex-count').textContent = offset_distance(...coords);
+      info.style.display = 'block';
+
+      let lineCoords = linedraw(...coords);
+      lineCoords.shift();
+      let s = lineCoords.map(([x, y]) => `use[href="#point"][data-x="${x}"][data-y="${y}"]`).join(', ');
+
+      ptGrp.querySelectorAll(s).forEach(p => p.classList.add('active'));
+    };
+  }
+
+  POINTS.forEach((row, index) => row.forEach(([x, y]) => {
+    let group = svg.querySelector(`g[data-x="${x}"][data-y="${y}"]`);
+    let point = group.querySelector(`use[href="#point"]`);
+
+    group.addEventListener('pointerout', e => {
+      group.classList.remove('hover');
+    });
+
+    group.addEventListener('click', e => {
+      let cl = e.target.classList,
+          sl = grid.querySelector('line.sight-line'),
+          targetIsSomeOtherUnitCounter = cl.contains('counter') && !cl.contains('clone'),
+          selected = RecordSheet.getSelected();
+
+      // maybe we should start with, "are we clicking on a counter?"
+      if (sl) {
+        let { troopNumber: sTn, troopAllegiance: sTa} = selected.dataset,
+            { troopNumber: tTn, troopAllegiance: tTa} = e.target.dataset,
+            sightLineInLockedPosition = !sl.classList.contains('active'),
+            targetIsCounterOrCloneOfSelected = cl.contains('counter') && sTn == tTn && sTa == tTa;
+
+        if (sightLineInLockedPosition && targetIsCounterOrCloneOfSelected) {
+          let counterParent = Counter.get(tTn, tTa).parentElement,
+              [x, y] = counterParent.getAttribute('transform').match(/-?\d+\.?\d*/g),
+              target = ptGrp.querySelector(`g[transform="translate(${sl.getAttribute('x2')} ${sl.getAttribute('y2')})"]`),
+              { x: x1, y: y1 } = counterParent.dataset,
+              { x: x2, y: y2 } = target.dataset;
+
+          sl.setAttributeNS(null, 'x1', x);
+          sl.setAttributeNS(null, 'y1', y);
+
+          SightLine.drawHexes(...[x1, y1, x2, y2].map(n => parseInt(n)));
+        } else if (targetIsCounterOrCloneOfSelected || targetIsSomeOtherUnitCounter) {
+          if (targetIsSomeOtherUnitCounter) {
+            RecordSheet.select(e.target);
+            Counter.select(e.target);
+          }
+
+          SightLine.clear();
+        }
+      } else if (targetIsSomeOtherUnitCounter) {
+        RecordSheet.select(e.target);
+        Counter.select(e.target);
+      }
+    });
+
+    point.addEventListener('click', e => {
+      let selectedSoldier = document.querySelector('.soldier-record.selected');
+      let existingOccupant =
+        svg.querySelector(`.counter[data-x="${point.dataset.x}"][data-y="${point.dataset.y}"]`);
+
+      if (selectedSoldier && !existingOccupant) {
+        let sl = svg.querySelector('.sight-line');
+
+        Counter.place(selectedSoldier, point);
+
+        if (sl) {
+          if (sl.classList.contains('active')) {
+            SightLine.clear();
+          } else {
+            let [x, y] = point.parentElement.getAttribute('transform').match(/-?\d+\.?\d*/g),
+                target = ptGrp.querySelector(`g[transform="translate(${sl.getAttribute('x2')} ${sl.getAttribute('y2')})"]`),
+                { x: x1, y: y1 } = point.dataset,
+                { x: x2, y: y2 } = target.dataset;
+
+            sl.setAttributeNS(null, 'x1', x);
+            sl.setAttributeNS(null, 'y1', y);
+
+            SightLine.drawHexes(...[x1, y1, x2, y2].map(n => parseInt(n)));
+          }
+        }
+      }
+    });
+
+    group.addEventListener('contextmenu', e => {
+      e.preventDefault();
+
+      let sl = svg.querySelector('.sight-line');
+
+      if (sl) {
+        sl.classList.toggle('active');
+
+        if (sl.classList.contains('active')) {
+          SightLine.clear();
+        } else {
+          group.querySelector(`use[href="#point"]`).classList.add('sight-line-target');
+        }
+
+        group.dispatchEvent(new MouseEvent('pointerover'));
+      }
+    });
+
+    group.addEventListener('pointerover', e => {
+      group.classList.add('hover');
+
+      let selected = RecordSheet.getSelected();
+
+      if (selected) {
+        let { troopNumber: tn, troopAllegiance: ta } = selected.dataset,
+            counter = Counter.get(tn, ta),
+            sl = svg.querySelector('line.sight-line');
+
+        if (counter && (!sl || sl.classList.contains('active'))) {
+          if (counter.dataset.x !== e.target.dataset.x || counter.dataset.y !== e.target.dataset.y) {
+            let coords = [
+              counter.dataset.x,
+              counter.dataset.y,
+              e.target.dataset.x,
+              e.target.dataset.y
+            ].map(n => parseInt(n));
+
+            SightLine.draw(...coords);
+          }
+        }
+      }
+    });
+
+    group.addEventListener('pointerout', e => {
+      let sl = svg.querySelector('.sight-line.active');
+
+      if (sl && sl.classList.contains('active')) {
+        SightLine.clear();
+      }
+    });
+
+    // ptGrp.appendChild(document.createTextNode('\n            '));
+    // ptGrp.appendChild(group);
+  }));
+
+  document.querySelectorAll('.soldier-record').forEach(el =>
+    el.addEventListener('click', e => {
+      if (el.classList.contains('selected')) {
+        el.classList.remove('selected');
+        RecordSheet.unSelect();
+        Counter.unSelect();
+      } else {
+        RecordSheet.select(el);
+        Counter.select(el);
+      }
+
+      SightLine.clear();
+    })
+  );
+
+  // document.querySelector('#grid').addEventListener('click', e => {
+  //   let point = ptGrp.querySelector(`[data-x="${e.target.dataset.x}"][data-y="${e.target.dataset.y}"]`),
+  //       sl = svg.querySelector('.sight-line');
+
+  //   if (sl) {
+  //     sl.classList.add('active');
+  //     point.dispatchEvent(new MouseEvent('mouseout'));
+  //     point.dispatchEvent(new MouseEvent('pointerover'));
+  //   }
+  // });
+
+  document.querySelectorAll('.end-move').forEach(el => el.addEventListener('click', e => {
+    let selected = RecordSheet.getSelected();
+
+    if (selected) {
+      Counter.endMove(selected);
+      RecordSheet.unSelect();
+      selected.classList.toggle('movement-ended');
+    }
+  }));
+
+  document.querySelectorAll('.end-turn').forEach(el =>
+    el.addEventListener('click', ({ target: { dataset: { allegiance }}}) => {
+      let dataSelector = `[data-troop-allegiance="${allegiance}"]`,
+          records = Array.from(qA(`.soldier-record${dataSelector}`)),
+          turnCounter = document.getElementById('turn-count'),
+          { textContent: count, dataset: { update }} = turnCounter;
+
+      el.setAttribute('disabled', '');
+
+      document
+        .querySelector(`button.end-turn:not([data-allegiance="${allegiance}"])`)
+        .removeAttribute('disabled');
+
+      if (update == '1') {
+        turnCounter.children.namedItem('count').textContent++
+        turnCounter.dataset.update = '0';
+      } else {
+        turnCounter.dataset.update = '1';
+      }
+
+      qA(`#firing-arcs ${dataSelector}`).forEach(el => el.remove());
+
+      records
+        .sort((el1, el2) => el1.dataset.troopNumber > el2.dataset.troopNumber)
+        .forEach(el => el.classList.remove('movement-ended'));
+
+      RecordSheet.select(records.at(0));
+      Counter.select(records.at(0));
+    })
+  );
+
+  document.querySelectorAll('.set-firing-arc').forEach(el => el.addEventListener('click', e => {
+    let selectedSoldier = document.querySelector('.soldier-record.selected');
+
+    if (selectedSoldier) {
+      let {troopNumber, troopAllegiance} = selectedSoldier.dataset,
+          counter = Counter.get(troopNumber, troopAllegiance);
+
+      let existingArcs = svg.querySelectorAll(
+        `#firing-arcs [data-troop-number="${troopNumber}"][data-troop-allegiance="${troopAllegiance}"]`
+      );
+
+      existingArcs.forEach(el => el.remove());
+
+      if (counter) {
+        let arcLayer = svg.querySelector('#shapes');
+        let outlineLayer = svg.querySelector('#lines');
+        let arcContainer = svg.querySelector('#firing-arcs');
+
+        let [x, y] = counter.parentElement.getAttribute('transform').match(/-?\d+\.?\d*/g);
+
+        const transform = getComputedStyle(grid).transform.match(/-?\d+\.?\d*/g);
+        const pt = new DOMPoint(x, y);
+        const mtx = new DOMMatrix(transform);
+        let tPt = pt.matrixTransform(mtx);
+
+        let pivotPoint = [tPt.x, tPt.y];
+        let firingArc = document.createElementNS(svgns, 'polygon');
+        let firingArcOutline = document.createElementNS(svgns, 'polygon');
+
+        firingArc.classList.add('firing-arc', 'active');
+        firingArc.dataset.troopNumber = troopNumber;
+        firingArc.dataset.troopAllegiance = troopAllegiance;
+        firingArc.dataset.size = e.target.dataset.size;
+        firingArc.setAttributeNS(null, 'points', `${pivotPoint} ${pivotPoint} ${pivotPoint}`);
+
+        firingArcOutline.dataset.troopNumber = troopNumber;
+        firingArcOutline.dataset.troopAllegiance = troopAllegiance;
+        firingArcOutline.setAttributeNS(null, 'points', `${pivotPoint} ${pivotPoint} ${pivotPoint}`);
+
+        let clipShape = document.createElementNS(svgns, 'circle');
+        clipShape.setAttributeNS(null, 'cx', tPt.x);
+        clipShape.setAttributeNS(null, 'cy', tPt.y);
+        clipShape.setAttributeNS(null, 'r', 100);
+
+        let clipPath = document.createElementNS(svgns, 'clipPath');
+        clipPath.setAttributeNS(null, 'id', `clip-path-${troopAllegiance}-${troopNumber}`);
+        clipPath.dataset.troopNumber = troopNumber;
+        clipPath.dataset.troopAllegiance = troopAllegiance;
+        clipPath.appendChild(clipShape);
+
+        arcContainer.appendChild(clipPath);
+        arcLayer.appendChild(firingArc);
+        outlineLayer.appendChild(firingArcOutline);
+
+        let firingArcPlacementListener = e => {
+          svg.querySelectorAll('.firing-arc.active').forEach(el => el.classList.remove('active'));
+          ptGrp.removeAttribute('style');
+          svg.removeEventListener('mousemove', positionFiringArc);
+          firingArc.removeEventListener('click', firingArcPlacementListener);
+          firingArc.removeEventListener('contextmenu', cancelFiringArcPlacement);
+        };
+
+        let cancelFiringArcPlacement = e => {
+          e.preventDefault();
+
+          firingArc.removeEventListener('click', firingArcPlacementListener);
+          firingArc.removeEventListener('contextmenu', cancelFiringArcPlacement);
+
+          let existingArcs = svg.querySelectorAll(
+            `#firing-arcs [data-troop-number="${troopNumber}"][data-troop-allegiance="${troopAllegiance}"]`
+          );
+
+          existingArcs.forEach(el => el.remove());
+
+          ptGrp.removeAttribute('style');
+          svg.removeEventListener('mousemove', positionFiringArc);
+        };
+
+        ptGrp.style.pointerEvents = 'none';
+        svg.addEventListener('mousemove', positionFiringArc);
+        firingArc.addEventListener('click', firingArcPlacementListener);
+        firingArc.addEventListener('contextmenu', cancelFiringArcPlacement);
+      }
+    }
+  }));
+
+  svg.addEventListener('wheel', e => {
+    e.preventDefault();
+
+    const pt = new DOMPoint(e.clientX, e.clientY),
+          svgP = pt.matrixTransform(svg.getScreenCTM().inverse());
+
+    let { x, y, width, height } = svg.viewBox.baseVal,
+
+        widthDelta = width * 0.25,
+        heightDelta = height * 0.25,
+
+        xChange = (svgP.x - x) / width * widthDelta,
+        yChange = (svgP.y - y) / height * heightDelta,
+
+        widthChange = (1 - ((svgP.x - x) / width)) * widthDelta,
+        heightChange = (1 - ((svgP.y - y) / height)) * heightDelta,
+
+        newX = parseInt(e.deltaY < 0 ? x + xChange : x - xChange),
+        newWidth = parseInt(e.deltaY < 0 ? width - xChange - widthChange : width + xChange + widthChange),
+
+        newY = parseInt(e.deltaY < 0 ? y + yChange : y - yChange),
+        newHeight = parseInt(e.deltaY < 0 ? height - yChange - heightChange : height + yChange + heightChange);
+
+    let vb = `${newX} ${newY} ${newWidth} ${newHeight}`
+
+    // TODO attribute change event?
+    localStorage.setItem('viewBox', vb);
+    svg.setAttributeNS(null, 'viewBox', vb);
+  }, { passive: false });
+
+  svg.addEventListener('pointerdown', e => {
+    e.preventDefault();
+
+    const minPanDistanceThreshold = 5;
+
+    let dist, ctm,
+        pan = false,
+        { x, y, width, height } = svg.viewBox.baseVal,
+        startPt = new DOMPoint(e.clientX, e.clientY),
+        movePt = new DOMPoint();
+
+    function pointerMove(e) {
+      movePt.x = e.clientX;
+      movePt.y = e.clientY;
+
+      if (!pan) {
+        dist = Math.sqrt((movePt.x - startPt.x)**2 + (movePt.y - startPt.y)**2);
+
+        if (dist >= minPanDistanceThreshold) {
+          pan = true;
+          svg.setPointerCapture(e.pointerId);
+          startPt.x = e.clientX;
+          startPt.y = e.clientY;
+        }
+      }
+
+      if (pan) {
+        ctm = svg.getScreenCTM().inverse();
+
+        const [svgStartPt, svgMovePt] = [startPt, movePt].map(p => p.matrixTransform(ctm)),
+              moveX = parseInt(svgStartPt.x - svgMovePt.x + x),
+              moveY = parseInt(svgStartPt.y - svgMovePt.y + y);
+
+        let vb = `${moveX} ${moveY} ${width} ${height}`;
+
+        localStorage.setItem('viewBox', vb);
+        svg.setAttributeNS(null, 'viewBox', vb);
+      }
+    }
+
+    function pointerUp(e) {
+      svg.removeEventListener('pointermove', pointerMove);
+      svg.removeEventListener('pointerup', pointerUp);
+    }
+
+    svg.addEventListener('pointermove', pointerMove);
+    svg.addEventListener('pointerup', pointerUp);
+  }, { passive: false });
+
+  recordSheetVisibility.addEventListener('input', e => {
+    let divs = document.querySelectorAll('#content div');
+
+    divs.forEach(d => {
+      if (recordSheetVisibility.checked) {
+        d.style.display = d.id == 'record-sheet' ? 'flex' : 'block';
+      } else {
+        d.style.display = 'none';
+      }
+    });
+  });
+
+  document.querySelectorAll('#toggle-firing-arc-vis input').forEach(el => el.addEventListener('input', e => {
+    let clipPaths = svg.querySelectorAll(`clipPath[data-troop-allegiance="${el.dataset.allegiance}"]`);
+
+    clipPaths.forEach(cp => cp.style.display = el.checked ? 'none' : '');
+  }));
+
+  document.getElementById('toggle-prone-counter').addEventListener('input', function(e) {
+    let selected = RecordSheet.getSelected();
+
+    if (selected) {
+      let template = q(`g#${selected.dataset.troopAllegiance}-${selected.dataset.troopNumber}`);
+
+      if (this.checked) {
+        let counter = document.createElementNS(svgns, 'use');
+        counter.setAttributeNS(null, 'href', '#counter-prone');
+        template.appendChild(counter);
+      } else {
+        template.querySelector('[href="#counter-prone"]').remove();
+      }
+    }
+  });
+
+  function save(filename, data) {
+    const blob = new Blob([data], {type: 'text/csv'});
+    if(window.navigator.msSaveOrOpenBlob) {
+        window.navigator.msSaveBlob(blob, filename);
+    }
+    else{
+        const elem = window.document.createElement('a');
+        elem.href = window.URL.createObjectURL(blob);
+        elem.download = filename;
+        document.body.appendChild(elem);
+        elem.click();
+        document.body.removeChild(elem);
+    }
+  }
+});
+\ No newline at end of file