three 基础库
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( function () {
class AnimationClipCreator {
static CreateRotationAnimation( period, axis = 'x' ) {
const times = [ 0, period ],
values = [ 0, 360 ];
const trackName = '.rotation[' + axis + ']';
const track = new THREE.NumberKeyframeTrack( trackName, times, values );
return new THREE.AnimationClip( null, period, [ track ] );
}
static CreateScaleAxisAnimation( period, axis = 'x' ) {
const times = [ 0, period ],
values = [ 0, 1 ];
const trackName = '.scale[' + axis + ']';
const track = new THREE.NumberKeyframeTrack( trackName, times, values );
return new THREE.AnimationClip( null, period, [ track ] );
}
static CreateShakeAnimation( duration, shakeScale ) {
const times = [],
values = [],
tmp = new THREE.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 THREE.VectorKeyframeTrack( trackName, times, values );
return new THREE.AnimationClip( null, duration, [ track ] );
}
static CreatePulsationAnimation( duration, pulseScale ) {
const times = [],
values = [],
tmp = new THREE.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 THREE.VectorKeyframeTrack( trackName, times, values );
return new THREE.AnimationClip( null, duration, [ track ] );
}
static CreateVisibilityAnimation( duration ) {
const times = [ 0, duration / 2, duration ],
values = [ true, false, true ];
const trackName = '.visible';
const track = new THREE.BooleanKeyframeTrack( trackName, times, values );
return new THREE.AnimationClip( null, duration, [ track ] );
}
static CreateMaterialColorAnimation( duration, colors ) {
const times = [],
values = [],
timeStep = duration / colors.length;
for ( let i = 0; i <= colors.length; i ++ ) {
times.push( i * timeStep );
values.push( colors[ i % colors.length ] );
}
const trackName = '.material[0].color';
const track = new THREE.ColorKeyframeTrack( trackName, times, values );
return new THREE.AnimationClip( null, duration, [ track ] );
}
}
THREE.AnimationClipCreator = AnimationClipCreator;
} )();