I'm trying to do a game using only 1 sprite - its a nice challenge. I was just wondering if there is any way to make a sprite point toward the origin (0,0) from any space on the coordinate plain. I think there is a geometry equation for this, but nothing I know of works for this (calculating the angle on a triangle using the sprite's X and Y coordinates). if it helps it's a clone that needs to point toward (0,0) from somewhere picked randomly onto the coordinate plain. Thanks!

-Red

You can have the main sprite at (0, 0) and use

point towards [ v]

To get that block you can create a temporary sprite and drag androp it to your Sprite from there, after done you can delete the temporary sprite.

asivi wrote:

You can have the main sprite at (0, 0) and use

point towards [ v]

To get that block you can create a temporary sprite and drag androp it to your Sprite from there, after done you can delete the temporary sprite.

yes, but in the same sprite it cannot select itself using that block or a clone of itself, and a clone cannot select a clone using that block.

RedFaceplant wrote:

asivi wrote:

You can have the main sprite at (0, 0) and use

point towards [ v]

To get that block you can create a temporary sprite and drag androp it to your Sprite from there, after done you can delete the temporary sprite.

yes, but in the same sprite it cannot select itself using that block or a clone of itself, and a clone cannot select a clone using that block.

Well, this project is saying other thing https://scratch.mit.edu/projects/194221391/

However, here is a CB that calculates direction for two points by using a trigonometric function:

define diection point1 (x1) (y1) point2 (x2) (y2)
set [direction v] to (([atan v] of (((x2) - (x1)) / ((y2) - (y1)))) + ((180) * <(y1) > (y2)>))

asivi wrote:

RedFaceplant wrote:

asivi wrote:

You can have the main sprite at (0, 0) and use

point towards [ v]

To get that block you can create a temporary sprite and drag androp it to your Sprite from there, after done you can delete the temporary sprite.

yes, but in the same sprite it cannot select itself using that block or a clone of itself, and a clone cannot select a clone using that block.

Well, this project is saying other thing https://scratch.mit.edu/projects/194221391/

However, here is a CB that calculates direction for two points by using a trigonometric function:

define diection point1 (x1) (y1) point2 (x2) (y2)
set [direction v] to (([atan v] of (((x2) - (x1)) / ((y2) - (y1)))) + ((180) * <(y1) > (y2)>))

You don't have to get it from another sprite. There's an easier way.

point towards (join [sprite] [])

TheParadoxScratcher wrote:

asivi wrote:

RedFaceplant wrote:

asivi wrote:

You can have the main sprite at (0, 0) and use

point towards [ v]

To get that block you can create a temporary sprite and drag androp it to your Sprite from there, after done you can delete the temporary sprite.

yes, but in the same sprite it cannot select itself using that block or a clone of itself, and a clone cannot select a clone using that block.

Well, this project is saying other thing https://scratch.mit.edu/projects/194221391/

However, here is a CB that calculates direction for two points by using a trigonometric function:

define diection point1 (x1) (y1) point2 (x2) (y2)
set [direction v] to (([atan v] of (((x2) - (x1)) / ((y2) - (y1)))) + ((180) * <(y1) > (y2)>))

You don't have to get it from another sprite. There's an easier way.

point towards (join [sprite] [])

The point is they only want to use one sprite - that requires a separate sprite or clone which is what @asivi has already suggested.

deck26 wrote:

TheParadoxScratcher wrote:

You don't have to get it from another sprite. There's an easier way.

 point towards (join [] [Sprite name]) 

The point is they only want to use one sprite - that requires a separate sprite or clone which is what @asivi has already suggested.

Hi @deck26, i think you missunderstood to @TheParadoxScratcher; probably they is talking about to use the name of the single(the only one in the project) parent Sprite,.Since such block is available in any Sprite @TheParadoxScratche suggestion is right.

@asivi - if there's only one sprite it can't point to itself. You already covered the case of a clone printing to the parent sprite. And no need to use join to get the name of the sprite since it can be hard-coded. So I still don't see how that suggestion fits.

RedFaceplant wrote:

I'm trying to do a game using only 1 sprite - its a nice challenge. I was just wondering if there is any way to make a sprite point toward the origin (0,0) from any space on the coordinate plain. I think there is a geometry equation for this, but nothing I know of works for this (calculating the angle on a triangle using the sprite's X and Y coordinates). if it helps it's a clone that needs to point toward (0,0) from somewhere picked randomly onto the coordinate plain. Thanks!

-Red

Draw with pen; that's the best I can offer without seeing the project

Coming back the original question

RedFaceplant wrote:

…it's a clone that needs to point toward (0,0) from somewhere picked randomly onto the coordinate plain. Thanks!

Let the parent hidden at (0, 0) then use in clone _point towards_ “parent”
You spent 1 clone so you can create 300 cloned sprites yet.
Do you need a clone pointing to other clone? Send the parent to coordinates of the other clone and use such block again, after you get the direction make the parent go back to (0, 0).
The point of my response was that you are not forced to use maths at all. It can be applied to get distances too, doing use of the sensing block (distance to _).
That is all.
Greetings.

deck26 wrote:

@asivi - if there's only one sprite it can't point to itself. You already covered the case of a clone printing to the parent sprite. And no need to use join to get the name of the sprite since it can be hard-coded. So I still don't see how that suggestion fits.

It's a technique the often used in cloning