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PropertyMixer

Buffered scene graph property that allows weighted accumulation; used internally.

Constructor​

PropertyMixer​

function PropertyMixer( binding: PropertyBinding, typeName: String, valueSize:
Number ): void;

-- binding
-- typeName
-- valueSize

Properties​

binding​

binding: PropertyBinding;

buffer​

buffer: TypedArray;

Buffer with size valueSize * 4.

This has the layout: [ incoming | accu0 | accu1 | orig ]

Interpolators can use .buffer as their .result and the data then goes to 'incoming'. 'accu0' and 'accu1' are used frame-interleaved for the cumulative result and are compared to detect changes. 'orig' stores the original state of the property.

cumulativeWeight​

cumulativeWeight: Number;

Default is 0.

cumulativeWeightAdditive​

cumulativeWeightAdditive: Number;

Default is 0.

valueSize​

valueSize: Number;

referenceCount​

referenceCount: Number;

Default is 0.

useCount​

useCount: Number;

Default is 0.

Methods​

accumulate​

function accumulate( accuIndex: Number, weight: Number ): undefined;

Accumulate data in buffer[accuIndex] 'incoming' region into 'accu[i]'.
If weight is 0 this does nothing.

accumulateAdditive​

function accumulateAdditive( weight: Number ): undefined;

Accumulate data in the 'incoming' region into 'add'.
If weight is 0 this does nothing.

apply​

function apply( accuIndex: Number ): undefined;

Apply the state of buffer 'accu[i]' to the binding when accus differ.

saveOriginalState​

function saveOriginalState( ): undefined;

Remember the state of the bound property and copy it to both accus.

restoreOriginalState​

function restoreOriginalState( ): undefined;

Apply the state previously taken via 'saveOriginalState' to the binding.

Source​

src/animation/PropertyMixer.js