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Billybob-Mario · 2012-07-18 18:58:08

Edit: MathWizz gave me the solution! Thank you:

Solved problem:
I'm making a game that scrolls on the X and Y axis. It will have turrets that shoot at the player. The projectiles need to be able to move in the correct direction, but they must do so by changing an xoffset and yoffset variable instead of saying

move [x] steps

What would be the math that converts direction into an x and y change?

Last edited by Billybob-Mario (2012-07-18 19:14:19)

MathWizz · 2012-07-18 19:01:34

forever
change x by ([sin v] of (angle))
change y by ([cos v] of (angle))
end

Wes64 · 2012-07-18 19:05:59

MathWizz wrote:

forever
change x by ([sin v] of ((angle)*[x]))
change y by ([cos v] of ((angle) * [x]))
end

Move x steps translates into this.

So if you want to move 10 steps replace x with 10.

MathWizz · 2012-07-18 19:09:51

Wes64 wrote:
MathWizz wrote:
forever
change x by ([sin v] of ((angle)*[x]))
change y by ([cos v] of ((angle) * [x]))
end
Move x steps translates into this.

So if you want to move 10 steps replace x with 10.

Oh, derp. You still got it wrong though.

forever
change x by (([sin v] of (angle))*(x))
change y by (([cos v] of (angle))*(x))
end

Last edited by MathWizz (2012-07-18 19:11:19)

Billybob-Mario · 2012-07-18 19:12:16

MathWizz wrote:

forever
change x by ([sin v] of (angle))
change y by ([cos v] of (angle))
end

Thank you! It works!

Hardmath123 · 2012-07-18 21:42:06

Why can't you use the move block? And if it's because you don't want the direction to change, how about locking the rotation style? http://wiki.scratch.mit.edu/wiki/Rotation_Style Just a thought. smile

Last edited by Hardmath123 (2012-07-18 21:42:20)

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archived forums

#1 2012-07-18 18:58:08

[Math] How to move in a direction without taking steps?

#2 2012-07-18 19:01:34

Re: [Math] How to move in a direction without taking steps?

#3 2012-07-18 19:05:59

Re: [Math] How to move in a direction without taking steps?

MathWizz wrote:

#4 2012-07-18 19:09:51

Re: [Math] How to move in a direction without taking steps?

Wes64 wrote:

MathWizz wrote:

#5 2012-07-18 19:12:16

Re: [Math] How to move in a direction without taking steps?

MathWizz wrote:

#6 2012-07-18 21:42:06

Re: [Math] How to move in a direction without taking steps?

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