Allow difficult terrain measurements on girdless maps

CHANGELOG.md

@@ -1,4 +1,9 @@
 ## In development
+**BREAKING** This update is incompatible with previous Terrain Ruler versions. If you're using Terrain Ruler, make sure you update Terrain Ruler to at least version 1.3.0.
+
+### New features
+- Drag Ruler can now measure difficult terrain on gridless maps (if the Terrain Ruler module is installed and enabled)
+
 ### Translation
 - Corrected typos in the german translation (thanks to CarnVanBeck!)
 

src/compatibility.js

@@ -18,7 +18,7 @@ export function highlightMeasurementTerrainRuler(ray, startDistance, tokenShape=
 export function measureDistances(segments, token, shape, gridSpaces=true, options={}) {
 	const opts = duplicate(options)
 	opts.gridSpaces = gridSpaces;
-	const terrainRulerAvailable = game.modules.get("terrain-ruler")?.active && canvas.grid.type !== CONST.GRID_TYPES.GRIDLESS;
+	const terrainRulerAvailable = game.modules.get("terrain-ruler")?.active && (!game.modules.get("TerrainLayer")?.active || canvas.grid.type !== CONST.GRID_TYPES.GRIDLESS);
 	if (terrainRulerAvailable) {
 		const firstNewSegmentIndex = segments.findIndex(segment => !segment.ray.dragRulerVisitedSpaces);
 		const previousSegments = segments.slice(0, firstNewSegmentIndex);

src/foundry_imports.js

@@ -130,7 +130,7 @@ export function measure(destination, {gridSpaces=true, snap=false} = {}) {
 	if (snap)
 		destination = getSnapPointForToken(destination.x, destination.y, this.draggedToken)
 
-	const terrainRulerAvailable = game.modules.get("terrain-ruler")?.active && canvas.grid.type !== CONST.GRID_TYPES.GRIDLESS;
+	const terrainRulerAvailable = game.modules.get("terrain-ruler")?.active && (!game.modules.get("TerrainLayer")?.active || canvas.grid.type !== CONST.GRID_TYPES.GRIDLESS);
 
 	const waypoints = this.waypoints.concat([destination]);
 	// Move the waypoints to the center of the grid if a size is used that measures from edge to edge
@@ -209,10 +209,12 @@ export function measure(destination, {gridSpaces=true, snap=false} = {}) {
 		}
 
 		// Highlight grid positions
-		if (terrainRulerAvailable)
-			highlightMeasurementTerrainRuler.call(this, cs.ray, cs.startDistance, shape, opacityMultiplier)
-		else
-			highlightMeasurementNative.call(this, cs.ray, cs.startDistance, shape, opacityMultiplier);
+		if (canvas.grid.type !== CONST.GRID_TYPES.GRIDLESS) {
+			if (terrainRulerAvailable)
+				highlightMeasurementTerrainRuler.call(this, cs.ray, cs.startDistance, shape, opacityMultiplier)
+			else
+				highlightMeasurementNative.call(this, cs.ray, cs.startDistance, shape, opacityMultiplier);
+		}
 	}
 
 	// Draw endpoints

src/movement_tracking.js

@@ -49,7 +49,7 @@ function calculateUpdate(combat, token, rays) {
 	}
 
 	// Add the passed waypoints to the combatant
-	const terrainRulerAvailable = game.modules.get("terrain-ruler")?.active && canvas.grid.type !== CONST.GRID_TYPES.GRIDLESS;
+	const terrainRulerAvailable = game.modules.get("terrain-ruler")?.active && (!game.modules.get("TerrainLayer")?.active || canvas.grid.type !== CONST.GRID_TYPES.GRIDLESS);
 	const dragRulerFlags = combatant.flags.dragRuler;
 	const waypoints = dragRulerFlags.passedWaypoints;
 	for (const ray of rays) {