I need to get rotating barbell to follow the mouse around the window.

Programming Questions

rjayy99

I need to get rotating barbell to follow the mouse around the window.

in Programming Questions • 2 years ago

Hi, I am in a beginner programming class, my final exam is Monday, when going over the review, I am having trouble with this one problem.. I need to make a barbell(line with an ellipse at each end) that rotates around its center, follow the mouse around the window. I have put together code for the barbell to rotate in the center of the screen. Any attempt to get the barbell to follow the mouse has been a disaster to the code... Any help or tips would be appreciated thank you...

int lineCenterX = 150;

int lineCenterY = 150;

int lineRadius = 30;

float angle = 0.0;

void setup ()

}

size(300, 300, P3D);

background(150);

fill(150, 170, 200);

{

void draw ()

}

background(150);

if (lineCenterX > 0)

}

translate(lineCenterX, lineCenterY);

rotate(radians(angle));

line(-1*lineRadius, 0, lineRadius, 0);

ellipse(-1*lineRadius, 0, 8, 8);

ellipse(lineRadius, 0, 8, 8);

angle += 0.8;

{

Replies(4)

cedrickie..

Re: I need to get rotating barbell to follow the mouse around the window.

2 years ago

just draw it at the mouse position

translate( mouseX, mouseY);

btw first open the curly bracket then close it }

rjayy99

Re: I need to get rotating barbell to follow the mouse around the window.

2 years ago

Thanks alot, all of the braces were reversed when I pasted it? Got it though.

millers81

Re: I need to get rotating barbell to follow the mouse around the window.

2 years ago

I have a similar problem.. Lets say I need to make the barbell appear in the position where the mouse is clicked, while continuing to rotate.(in other words, once I click somewhere on the screen,

the baton appears centered at that position and rotates around that point until I click somewhere else).

Thanks!

cedrickie..

Re: I need to get rotating barbell to follow the mouse around the window.

2 years ago

simple create 2 variables.
lets call them x and y
set them to where your barbell should appear first in setup.

then draw them at that location using translate(x,y);

now create the function

void mouseReleased(){

}

and there you update your x and y variables, with the current mouse position.
thats it.

I didnt post a working code example. give it a try, its actually not that hard.

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