accumulateAdditive method
Implementation
accumulateAdditive(int weight) {
var buffer = this.buffer, stride = valueSize, offset = stride * _addIndex;
if (cumulativeWeightAdditive == 0) {
// add = identity
_setIdentity();
}
// add := add + incoming * weight
_mixBufferRegionAdditive(buffer, offset, 0, weight, stride);
cumulativeWeightAdditive += weight;
}