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Index › Programming Questions & Help › Syntax Questions › Scale variables, and return integer!
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Scale variables, and return integer! (Read 882 times)
alkopop79
Scale variables, and return integer!
Jan 14th, 2010, 3:03pm  
Hi,

just working on a simple XY-controller that sends MIDI control change messages. The mouseX and mouseY have to be scaled to 0-127 (MIDI range) and integer values. The problem is that the map() function returns floats which the MIDI controller send function doesn't accept. Any ideas how to scale a variable and return integer? Here's the code (it won't work!):

import rwmidi.*;
MidiOutput output;
int mousex;
int mousey;
void setup(){
 size(500,500);
 smooth();

}
void draw(){
   output = RWMidi.getOutputDevices()[0].createOutput();
 background(50);
 int CCnumx=10;
 int CCnumy=11;
 mousex=map(mouseX,0,127);
 mousey=map(mouseY,0,127);
 output.sendController(2,CCnumx,mousex);
 output.sendController(1,CCnumy,mousey);
 fill(175);
 ellipse(mouseX,mouseY,10,10);
}
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JR
Re: Scale variables, and return integer!
Reply #1 - Jan 14th, 2010, 3:14pm  
mousex= (int)map(mouseX,0,127);
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alkopop79
Re: Scale variables, and return integer!
Reply #2 - Jan 14th, 2010, 4:13pm  
Thanks man!
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phling
Re: Scale variables, and return integer!
Reply #3 - Jan 14th, 2010, 4:46pm  
try this:

mousex = round(map(mouseX, 0, width, 0, 127));

map takes 5 parameters.
if you use round() it will give you values from 0 up to 127. Using int() or (int) the maximum will be 126.
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