Improved pause animations
Previously, the pause shape could be identical to the following shape, which meant that the mouth kept frozen at the beginning of the next word.
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@ -23,10 +23,6 @@ Shape relax(Shape shape) {
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return relaxedShapes[static_cast<size_t>(shape)];
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}
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Shape getRelaxedBridge(Shape lhs, Shape rhs) {
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return lhs == rhs ? lhs : relax(lhs);
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}
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Shape getClosestShape(Shape reference, ShapeSet shapes) {
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if (shapes.empty()) {
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throw std::invalid_argument("Cannot select from empty set of shapes.");
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@ -11,9 +11,6 @@ Shape getBasicShape(Shape shape);
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// Returns the mouth shape that results from relaxing the specified shape.
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Shape relax(Shape shape);
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// Returns the mouth shape to use for *short* pauses between words.
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Shape getRelaxedBridge(Shape lhs, Shape rhs);
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// A set of mouth shapes that can be used to represent a certain sound.
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// The actual selection will be performed based on similarity with the previous or next shape.
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using ShapeSet = std::set<Shape>;
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@ -1,31 +1,40 @@
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#include "pauseAnimation.h"
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#include "animationRules.h"
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Shape getPauseShape(Shape previous, Shape next, centiseconds duration) {
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// For very short pauses: Just hold the previous shape
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if (duration < 12_cs) {
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return previous;
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}
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// For short pauses: Relax the mouth
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if (duration <= 35_cs) {
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// It looks odd if the pause shape is identical to the next shape.
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// Make sure we find a relaxed shape that's different from the next one.
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for (Shape currentRelaxedShape = previous;;) {
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Shape nextRelaxedShape = relax(currentRelaxedShape);
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if (nextRelaxedShape != next) {
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return nextRelaxedShape;
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}
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if (nextRelaxedShape == currentRelaxedShape) {
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// We're going in circles
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break;
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}
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currentRelaxedShape = nextRelaxedShape;
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}
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}
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// For longer pauses: Close the mouth
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return Shape::X;
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}
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JoiningContinuousTimeline<Shape> animatePauses(const JoiningContinuousTimeline<Shape>& shapes) {
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JoiningContinuousTimeline<Shape> result(shapes);
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// Don't close mouth for short pauses
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for_each_adjacent(shapes.begin(), shapes.end(), [&](const Timed<Shape>& lhs, const Timed<Shape>& pause, const Timed<Shape>& rhs) {
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for_each_adjacent(shapes.begin(), shapes.end(), [&](const Timed<Shape>& previous, const Timed<Shape>& pause, const Timed<Shape>& next) {
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if (pause.getValue() != Shape::X) return;
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const centiseconds maxPausedOpenMouthDuration = 35_cs;
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const TimeRange timeRange = pause.getTimeRange();
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if (timeRange.getDuration() <= maxPausedOpenMouthDuration) {
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result.set(timeRange, getRelaxedBridge(lhs.getValue(), rhs.getValue()));
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}
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});
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// Keep mouth open into pause if it just opened
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for_each_adjacent(shapes.begin(), shapes.end(), [&](const Timed<Shape>& secondLast, const Timed<Shape>& last, const Timed<Shape>& pause) {
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if (pause.getValue() != Shape::X) return;
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centiseconds lastDuration = last.getDuration();
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const centiseconds minOpenDuration = 20_cs;
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if (isClosed(secondLast.getValue()) && !isClosed(last.getValue()) && lastDuration < minOpenDuration) {
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const centiseconds minSpillDuration = 20_cs;
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centiseconds spillDuration = std::min(minSpillDuration, pause.getDuration());
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result.set(pause.getStart(), pause.getStart() + spillDuration, getRelaxedBridge(last.getValue(), Shape::X));
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}
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result.set(pause.getTimeRange(), getPauseShape(previous.getValue(), next.getValue(), pause.getDuration()));
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});
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return result;
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