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Erase closest line

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This commit is contained in:
David Rowe 2017-02-17 15:21:59 +13:00
parent 9c1bb37a34
commit 25761adf6c
1 changed files with 38 additions and 1 deletions
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39
scripts/system/fingerPaint.js
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@ -26,7 +26,7 @@
// Paints in 3D. // Paints in 3D.
var brushName = name, var brushName = name,
STROKE_COLOR = { red: 250, green: 0, blue: 0 }, STROKE_COLOR = { red: 250, green: 0, blue: 0 },
ERASE_SEARCH_DISTANCE = 0.1, // m ERASE_SEARCH_RADIUS = 0.1, // m
isDrawingLine = false, isDrawingLine = false,
entityID, entityID,
basePosition, basePosition,
@ -118,6 +118,43 @@
} }
function eraseClosestLine(position) { function eraseClosestLine(position) {
// Erase closest line that is within search radius of finger tip.
var entities,
entitiesLength,
properties,
entityID,
entityDistance,
i,
pointsLength,
j,
distance,
found = false,
foundID,
foundDistance = ERASE_SEARCH_RADIUS;
// Find entities with bounding box within search radius.
entities = Entities.findEntities(position, ERASE_SEARCH_RADIUS);
// Fine polyline entity with closest point within search radius.
for (i = 0, entitiesLength = entities.length; i < entitiesLength; i += 1) {
properties = Entities.getEntityProperties(entities[i], ["type", "position", "linePoints"]);
if (properties.type === "PolyLine") {
basePosition = properties.position;
for (j = 0, pointsLength = properties.linePoints.length; j < pointsLength; j += 1) {
distance = Vec3.distance(position, Vec3.sum(basePosition, properties.linePoints[j]));
if (distance <= foundDistance) {
found = true;
foundID = entities[i];
foundDistance = distance;
}
}
}
}
// Delete found entity.
if (found) {
Entities.deleteEntity(foundID);
}
} }
function tearDown() { function tearDown() {