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Ignore spurious finger tip position values

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David Rowe 2017-02-18 13:35:16 +13:00
parent 784009a9fa
commit 777a0b51c1
1 changed files with 10 additions and 2 deletions
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12
scripts/system/fingerPaint.js
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@ -70,7 +70,9 @@
function drawLine(position, width) { function drawLine(position, width) {
// Add a stroke to the polyline if stroke is a sufficient length. // Add a stroke to the polyline if stroke is a sufficient length.
var localPosition; var localPosition,
distanceToPrevious,
MAX_DISTANCE_TO_PREVIOUS = 1.0;
if (!isDrawingLine) { if (!isDrawingLine) {
print("ERROR: drawLine() called when not drawing line"); print("ERROR: drawLine() called when not drawing line");
@ -78,8 +80,14 @@
} }
localPosition = Vec3.subtract(position, basePosition); localPosition = Vec3.subtract(position, basePosition);
distanceToPrevious = Vec3.distance(localPosition, strokePoints[strokePoints.length - 1]);
if (Vec3.distance(localPosition, strokePoints[strokePoints.length - 1]) >= MIN_STROKE_LENGTH if (distanceToPrevious > MAX_DISTANCE_TO_PREVIOUS) {
// Ignore occasional spurious finger tip positions.
return;
}
if (distanceToPrevious >= MIN_STROKE_LENGTH
&& strokePoints.length < MAX_POINTS_PER_LINE) { && strokePoints.length < MAX_POINTS_PER_LINE) {
strokePoints.push(localPosition); strokePoints.push(localPosition);
strokeNormals.push(strokeNormal()); strokeNormals.push(strokeNormal());