Knnregressor multiout (#153)

Amend `KNNRegressor` to multi-dimensional mapping

release-packaging/Classes/FluidKNNRegressor.sc

@@ -28,18 +28,22 @@ FluidKNNRegressor : FluidModelObject {
 		this.prSendMsg(this.predictMsg(sourceDataSet, targetDataSet));
 	}
 
-	predictPointMsg { |buffer|
+	predictPointMsg { |sourceBuffer, targetBuffer|
-		^this.prMakeMsg(\predictPoint,id, this.prEncodeBuffer(buffer));
+		^this.prMakeMsg(\predictPoint,id,
+			this.prEncodeBuffer(sourceBuffer),
+			this.prEncodeBuffer(targetBuffer),
+			["/b_query", targetBuffer.asUGenInput]);
 	}
 
-	predictPoint { |buffer, action|
+	predictPoint { |sourceBuffer, targetBuffer, action|
-		actions[\predictPoint] = [number(FluidMessageResponse,_,_),action];
+		actions[\predictPoint] = [nil,{action.value(targetBuffer)}];
-		this.prSendMsg(this.predictPointMsg(buffer));
+		this.predictPointMsg(sourceBuffer, targetBuffer);
+		this.prSendMsg(this.predictPointMsg(sourceBuffer, targetBuffer));
 	}
 
-	kr{|trig, inputBuffer,outputBuffer|
+	kr{|trig, inputBuffer, outputBuffer, numNeighbours, weight|
 		^FluidKNNRegressorQuery.kr(K2A.ar(trig),
-			this, this.numNeighbours, this.weight,
+			this, numNeighbours??{this.numNeighbours}, weight??{this.weight},
 			this.prEncodeBuffer(inputBuffer),
 			this.prEncodeBuffer(outputBuffer));
 	}