-
Simple math problem (cannon rotation)
Hi.
My problem is easy
I need to know how to how to make a bullet go in the same direction as the cannon points. I don't need curves or anything, just a straight line forward.
To explain a bit better: if the cannon points left, the bullet will go left... right-right, and so on for all 360 degrees.
I just suck at Math and I wanna make a simple minigame so ty for replies
-
Prid - Outing
Depends on how you are controlling the cannon. If you're moving it with Arrow Keys and changing its _rotation, then set the bullet the same as the cannon's _rotation, but if you're moving the cannon at the mouse's angle, then you'd still set the bullet's angle to the cannon's angle, aka, the _rotation. Tell me which it is, and I'll provide the correct Actionscript
AS2 or AS3?
I am back, guys ... and finally 18 :P
BRING BACK THE OLD DESIGN!! OR AT LEAST FIX THE AS TAGS
-
The cannon actually rotates by itself. Only thing changing is the speed of the rotation (it can be negative, too)
So, when you press a key, the cannon shoots the object in the cannon in the facing direction in a straight line
Thats pretty much it
Edit: Oh and yeah, its _rotation, simple as that
thanks
-
Senior Member
The very basic movement based on rotation uses 2 equations, one for x and other for y coordinate:
//first convert _rotation from degrees into radians
ang = Math.PI * (cannon._rotation)/180;
//set the speed
speed = 5;
//change the coordinates
dx = speed * Math.cos(ang);
dy = speed * Math.sin(ang);
//now add the components to both coordinates in enterframe event
bullet.x += dx;
bullet.y += dy;
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
|
Click Here to Expand Forum to Full Width
|