From 5be3472f0f61d2e479f42759fed6fafd2a0e739a Mon Sep 17 00:00:00 2001 From: mick grierson Date: Tue, 22 Sep 2015 09:21:43 +0100 Subject: more work for kadenze mooc --- maximilian_examples/8.Counting2.cpp | 41 +++++++++++++++++++++++-------------- 1 file changed, 26 insertions(+), 15 deletions(-) (limited to 'maximilian_examples/8.Counting2.cpp') diff --git a/maximilian_examples/8.Counting2.cpp b/maximilian_examples/8.Counting2.cpp index ce016d0..05984c5 100755 --- a/maximilian_examples/8.Counting2.cpp +++ b/maximilian_examples/8.Counting2.cpp @@ -1,24 +1,35 @@ +// This example shows how you can create a basic counter with a phasor. +// A phasor oscillator can create a ramp between any two values. +// It takes three inputs - frequency, start value and stop value. +// These are all double precision floats, so it's a continuous slide. +// If you write it into an integer, it will round it off for you. +// This creates a bunch of steps. + #include "maximilian.h" -maxiOsc myCounter,mySwitchableOsc;//these oscillators will help us count and make sound. +maxiOsc myCounter,mySquare;//these oscillators will help us count and play sound int CurrentCount;//we're going to put the current count in this variable so that we can use it more easily. -double myOscOutput;//we're going to stick the output here to make it easier to mess with stuff. + void setup() {//some inits - //nothing to go here this time + //nothing to go here this time } void play(double *output) { - - CurrentCount=myCounter.phasor(1, 1, 9);//phasor can take three arguments; frequency, start value and end value. - - if (CurrentCount<5)//simple if statement - - myOscOutput=mySwitchableOsc.square(CurrentCount*100); - - else if (CurrentCount>=5)//and the 'else' bit. - - myOscOutput=mySwitchableOsc.sinewave(CurrentCount*50);//one osc object can produce whichever waveform you want. - - *output=myOscOutput;//point me at your speakers and fire. + + // Here you can see that CurrentCount is an int. It's taking the continuous output of the phasor and convering it. + // You don't need to explicityly 'cast' (i.e. change) the value from a float to an int. + // It happens automagically in these cases. + + // Once every second, CurrentCount counts from 1 until it gets to 9, then resets itself. + // When it reaches 9 it resets, so the values you get are 1-8. + + CurrentCount=myCounter.phasor(1, 1, 9);//phasor can take three arguments; frequency, start value and end value. + + // If we multiply the output of CurrentCount by 100, we get 100,200,300,400,500,600,700,800 in that order. + // These become the frequency of the oscillator. + // In this case, the oscillator is an antialiased sawtooth wave. Yum. + output[0]=mySquare.sawn(CurrentCount*100); + output[1]=output[0]; + } -- cgit v1.3