This may be somewhere between syntax and program forums:

I am having a problem getting my code to draw to screen. I am importing old code from alpha version, but I have reworked it to what I mostly feel are current syntax protocols. I am using mac OSX, regular P103 download; do I need to install something else? No exceptions or errors are thrown at run. Any way, here is the code:

void setup() {
 
 size(600,600);
 smooth();
 background(255);
 
}
/*
void loop(int bang,int buck,int blast){
 bang=abs(mouseY-pmouseY);
 buck=abs(mouseX-pmouseX);
 
 if(bang>buck){
   blast=bang;
 }else{
   blast=buck;
 }
 
 switch(key){
   
   case 'a':
   
   translate(mouseX,mouseY);
   fill(220,60*random(1,4),0,100-(blast));
   ellipse(0,0,0,blast);
   
   break;
 }
}
*/
void loop(){
 fill(0,0,0,50);
 ellipse(mouseX,mouseY,0,20);
}
 

The commented out sections don't draw, the loop not so commented out doesn't draw, and the only thing that does seem to draw is something like this program example with no other classes:

ellipse(50,50,0,50);

Yes, thank you. However, the program when run as the following still doesn't draw.

void setup() {
 
 size(600,600);
 background(255);
 
}

void draw(int bang,int buck,int blast){
 bang=abs(mouseY-pmouseY);
 buck=abs(mouseX-pmouseX);
 
 if(bang>buck){
   blast=bang;
 }else{
   blast=buck;
 }
 
 switch(key){
   
   case 'a':
   
   translate(mouseX,mouseY);
   fill(220,60,0,100);
   ellipse(0,0,5,blast);
   
   break;
 }
}

 

Oops let me expand... and actually looking actually reading the code... here are the problems I see.

void draw(int bang,int buck,int blast)
there are no parameters for draw... that i know of unless theyre on documented but since I havent seen it anywhere else in the discourse Im going to assume thats there arent.

You should read a few of the examples to become familar with the language structure. Anyhow I rewrote the code and here it is.

int bang, buck,blast;
boolean drawEllipse;

void setup() {
 size(600,600);
 background(255);

 drawEllipse = false;  
}

void draw(){
 bang=abs(mouseY-pmouseY);
 buck=abs(mouseX-pmouseX);

 if(bang>buck){
   blast=bang;
 }
 else{
   blast=buck;
 }

 if(drawEllipse) {
   translate(mouseX,mouseY);
   fill(220,60,0,100);
   ellipse(0,0,5,blast);
 }
}

void keyPressed() {
 switch(key){

 case 'a':    
   drawEllipse = true;
   break;
 }
}

ps: written in 0105 beta for OSX and it saves changes!

Oh yeah, almost forgot. . . the >break;< part doesn't work, it won't stop drawing.