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Index › Programming Questions & Help › Programs › Re: Help! Mouse pressed function!!
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Re: Help! Mouse pressed function!! (Read 649 times)
PhiLho 
Re: Help! Mouse pressed function!!
Apr 15th, 2010, 9:47am  
Without even going to see more, I notice: if (startup = true) {
That's a trap lot of coders fall into.
Well, mostly in C/C++, because in Java the cases where it is legal are rare (variable must be boolean), but you just hit it!

The problem is that you wrote = (assignment) instead of == (equality test). So startup becomes true as soon as it goes to false...

Note: when you have a boolean, just test like:
if (startup) {
it is cleaner (in my eyes) and less prone to this issue!
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blindfish
Re: Help! Mouse pressed function!!
Reply #1 - Apr 15th, 2010, 10:04am  
Two problems here.  First:

Quote:
if (mousePressed == true) {
  if ((mouseX > 0) && (mouseX < 400) && (mouseY>0) && (mouseY> 400)) {


I think you might have meant mouseY<400; though in actual fact you might have been better off with something along the lines of:

Code:
if (mousePressed == true) {
   if ((mouseX > 0) && (mouseX < width) && (mouseY>0) && (mouseY< height)) {


Then the code will work no matter what size your sketch window Wink

Second and more fundamental problem:

Quote:
if (startup = true) {
 // snip
}
else if (level1 = true) {
 // snip
}


A single = sign is the assignment operator; so what you're doing in the if condition is setting the value of startup to true; which is why your else doesn't get executed.  What you need is:

Code:
if (startup == true) {


Or you can in fact abbreviate boolean true conditions to simply:

Code:
if (startup) {


Roll Eyes PhiLho beat me to it; though he didn't mention the mistake in your mousePressed condition Tongue
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Where is the what if the what is in why?
 
baseballgirl292
Re: Help! Mouse pressed function!!
Reply #2 - Apr 17th, 2010, 3:52pm  
thank you to all who answered.
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