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import {
AnimationClip,
BooleanKeyframeTrack,
ColorKeyframeTrack,
NumberKeyframeTrack,
Vector3,
VectorKeyframeTrack
} from 'three';
class AnimationClipCreator {
static CreateRotationAnimation( period, axis = 'x' ) {
const times = [ 0, period ], values = [ 0, 360 ];
const trackName = '.rotation[' + axis + ']';
const track = new NumberKeyframeTrack( trackName, times, values );
return new AnimationClip( null, period, [ track ] );
}
static CreateScaleAxisAnimation( period, axis = 'x' ) {
const times = [ 0, period ], values = [ 0, 1 ];
const trackName = '.scale[' + axis + ']';
const track = new NumberKeyframeTrack( trackName, times, values );
return new AnimationClip( null, period, [ track ] );
}
static CreateShakeAnimation( duration, shakeScale ) {
const times = [], values = [], tmp = new Vector3();
for ( let i = 0; i < duration * 10; i ++ ) {
times.push( i / 10 );
tmp.set( Math.random() * 2.0 - 1.0, Math.random() * 2.0 - 1.0, Math.random() * 2.0 - 1.0 ).
multiply( shakeScale ).
toArray( values, values.length );
}
const trackName = '.position';
const track = new VectorKeyframeTrack( trackName, times, values );
return new AnimationClip( null, duration, [ track ] );
}
static CreatePulsationAnimation( duration, pulseScale ) {
const times = [], values = [], tmp = new Vector3();
for ( let i = 0; i < duration * 10; i ++ ) {
times.push( i / 10 );
const scaleFactor = Math.random() * pulseScale;
tmp.set( scaleFactor, scaleFactor, scaleFactor ).
toArray( values, values.length );
}
const trackName = '.scale';
const track = new VectorKeyframeTrack( trackName, times, values );
return new AnimationClip( null, duration, [ track ] );
}
static CreateVisibilityAnimation( duration ) {
const times = [ 0, duration / 2, duration ], values = [ true, false, true ];
const trackName = '.visible';
const track = new BooleanKeyframeTrack( trackName, times, values );
return new AnimationClip( null, duration, [ track ] );
}
static CreateMaterialColorAnimation( duration, colors ) {
const times = [], values = [],
timeStep = ( colors.length > 1 ) ? duration / ( colors.length - 1 ) : 0;
for ( let i = 0; i < colors.length; i ++ ) {
times.push( i * timeStep );
const color = colors[ i ];
values.push( color.r, color.g, color.b );
}
const trackName = '.material.color';
const track = new ColorKeyframeTrack( trackName, times, values );
return new AnimationClip( null, duration, [ track ] );
}
}
export { AnimationClipCreator };
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