rivers creator dialog

modules/ui/rivers-creator.js

@@ -0,0 +1,120 @@
+"use strict";
+function createRiver() {
+  if (customization) return;
+  closeDialogs();
+  if (!layerIsOn("toggleRivers")) toggleRivers();
+
+  document.getElementById("toggleCells").dataset.forced = +!layerIsOn("toggleCells");
+  if (!layerIsOn("toggleCells")) toggleCells();
+
+  tip("Click to add river point, click again to remove", true);
+  debug.append("g").attr("id", "controlCells");
+  viewbox.style("cursor", "crosshair").on("click", onCellClick);
+
+  createRiver.cells = [];
+  const body = document.getElementById("riverCreatorBody");
+
+  $("#riverCreator").dialog({
+    title: "Create River",
+    resizable: false,
+    position: {my: "left top", at: "left+10 top+10", of: "#map"},
+    close: closeRiverCreator
+  });
+
+  if (modules.createRiver) return;
+  modules.createRiver = true;
+
+  // add listeners
+  document.getElementById("riverCreatorComplete").addEventListener("click", addRiver);
+  document.getElementById("riverCreatorCancel").addEventListener("click", () => $("#riverCreator").dialog("close"));
+  body.addEventListener("click", function (ev) {
+    const el = ev.target;
+    const cl = el.classList;
+    const cell = +el.parentNode.dataset.cell;
+    if (cl.contains("editFlux")) pack.cells.fl[cell] = +el.value;
+    else if (cl.contains("icon-trash-empty")) removeCell(cell);
+  });
+
+  function onCellClick() {
+    const cell = findCell(...d3.mouse(this));
+
+    if (createRiver.cells.includes(cell)) removeCell(cell);
+    else addCell(cell);
+  }
+
+  function addCell(cell) {
+    createRiver.cells.push(cell);
+    drawCells(createRiver.cells);
+
+    const flux = pack.cells.fl[cell];
+    const line = `<div class="editorLine" data-cell="${cell}">
+      <span>Cell ${cell}</span>
+      <span data-tip="Set flux affects river width" style="margin-left: 0.4em">Flux</span>
+      <input type="number" min=0 value="${flux}" class="editFlux" style="width: 5em"/>
+      <span data-tip="Remove the cell" class="icon-trash-empty pointer"></span>
+    </div>`;
+    body.innerHTML += line;
+  }
+
+  function removeCell(cell) {
+    createRiver.cells = createRiver.cells.filter(c => c !== cell);
+    drawCells(createRiver.cells);
+    body.querySelector(`div[data-cell='${cell}']`)?.remove();
+  }
+
+  function drawCells(cells) {
+    debug
+      .select("#controlCells")
+      .selectAll(`polygon`)
+      .data(cells)
+      .join("polygon")
+      .attr("points", d => getPackPolygon(d))
+      .attr("class", "current");
+  }
+
+  function addRiver() {
+    const {rivers, cells} = pack;
+    const {addMeandering, getApproximateLength, getWidth, getOffset, getName, getRiverPath} = Rivers;
+
+    const riverId = last(rivers).i + 1;
+    const riverCells = createRiver.cells;
+
+    riverCells.forEach(cell => {
+      if (!cells.r[cell]) cells.r[cell] = riverId;
+    });
+
+    const source = riverCells[0];
+    const mouth = riverCells[riverCells.length - 1];
+    const sourceWidth = 0.05;
+    const widthFactor = 1;
+
+    const meanderedPoints = addMeandering(riverCells);
+
+    const discharge = cells.fl[mouth]; // m3 in second
+    const length = getApproximateLength(meanderedPoints);
+    const width = getWidth(getOffset(discharge, meanderedPoints.length, widthFactor, sourceWidth));
+    const name = getName(mouth);
+
+    rivers.push({i: riverId, source, mouth, discharge, length, width, widthFactor, sourceWidth, parent: riverId, cells: riverCells, basin: riverId, name, type: "River"});
+
+    // render river
+    lineGen.curve(d3.curveCatmullRom.alpha(0.1));
+    viewbox
+      .select("#rivers")
+      .append("path")
+      .attr("id", "river" + riverId)
+      .attr("d", getRiverPath(meanderedPoints, widthFactor, sourceWidth));
+
+    editRiver(riverId);
+  }
+
+  function closeRiverCreator() {
+    debug.select("#controlCells").remove();
+    restoreDefaultEvents();
+    clearMainTip();
+
+    const forced = +document.getElementById("toggleCells").dataset.forced;
+    document.getElementById("toggleCells").dataset.forced = 0;
+    if (forced && layerIsOn("toggleCells")) toggleCells();
+  }
+}