# Rotation movement
**URL:** https://discourse.processing.org/t/rotation-movement/40509
**Category:** Coding Questions
**Created:** [January 8, 2023, 10:59am UTC](https://discourse.processing.org/t/rotation-movement/40509 "2023-01-08T10:59:29Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ctremblay](https://discourse.processing.org/u/ctremblay)
#### Post date: [January 8, 2023, 10:59am UTC](https://discourse.processing.org/t/rotation-movement/40509/1 "2023-01-08T10:59:30Z")
I’m trying to make a fun game & watched a few videos on rotation, but my rotation aint being consistant. I drew a red line where it first started moving so i could check, but now it moving backwards sideways it barely follows the path it went the last time before rotation. I want to press w or up and the ship moves upwards. i’ll make the red line point desired direction.
sketch
```auto
Mouse m;
void setup(){
size(600,600);
m = new Mouse();
}
void draw(){
background(0);
m.move();
m.show();
}
void keyPressed(){
if (key == 'w'){m.spd = 1;}
if (key == 'a'){m.r -= 1;}
if (key == 'd'){m.r += 1;}
}
void keyReleased(){
if (key == 'w'){m.spd = 0;}
}
```
mouse
```auto
class Mouse{
PVector pos;
int health = 1;
int r = 0;
int spd = 0;
Mouse(){
pos = new PVector(300,300);
//pos = new PVector(random(width),random(height));
}
void show(){
pushMatrix();
translate(pos.x,pos.y);
rotate(radians(r));
noStroke();
int s = 20;
triangle(0,-s,-s,s,s,s);
stroke(255,0,0);
line(0,0,0,-100);
popMatrix();
}
void move(){
pos.x += cos(r) * spd;
pos.y += sin(r) * spd;
}
}
```
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [January 8, 2023, 12:07pm UTC](https://discourse.processing.org/t/rotation-movement/40509/2 "2023-01-08T12:07:28Z")
> [@ctremblay](#):
>
> ```auto
> .... cos(r) * spd;
> pos.y += sin(r) * spd;
>
> ```
Missing radians() here?
---
### Author:  [@ctremblay](https://discourse.processing.org/u/ctremblay)
#### Post date: [January 8, 2023, 12:08pm UTC](https://discourse.processing.org/t/rotation-movement/40509/3 "2023-01-08T12:08:47Z")
i’ll try and add radians. ty