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Topic: world to local coordinates (Read 291 times) |
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theserge
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world to local coordinates
« on: Dec 23rd, 2004, 10:08am » |
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I am trying to pass the mouse coordinates to a button for a hit-test, but the button has been transformed (scaled and translated). Is there a simple way to convert mouseX and mouseY to the local coordinates of the button? Thanks!
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st33d
 
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Re: world to local coordinates
« Reply #1 on: Dec 23rd, 2004, 2:49pm » |
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Convert mouseX and mouseY to the mouse button? I'm sorry but I don't understand.
I've presented a travelling button below that scales. I didn't have to convert anything though. Perhaps you can say what it is you wanted to do in reference to this thing below.
Code:
//execute code and wave mouse over expanding square
myButton one; //button is used by java
void setup(){
size(400,400);
one = new myButton(0.0);
smooth();
framerate(24);
}
void loop(){
one.update();
}
class myButton{
float x, y, sizeR;
color c;
myButton(float x){
this.x = x;
y = 100;
sizeR = 10;
c = #FFFFFF;
}//constructor;
void update(){
background(0);
x = (x + 0.5)%width;
sizeR = (sizeR + 0.5)%40.0;
if (overRect(mouseX, mouseY , x, y, x+sizeR, y+sizeR)){
c = #FF00FF;
}else{
c = #FFFFFF;
}
fill (c);
rect (x, y, sizeR, sizeR);
}//void;
}//class;
boolean overRect(float xo, float yo, float x1, float y1, float x2, float y2){
if (xo >= x1 && xo <= x2 &&
yo >= y1 && yo <= y2) {
return true;
} else {
return false;
}
}
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At the least I hope it shows a different method.
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I could murder a pint.
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