drawing a line

[delusan]

I am attempting to draw a straight horizontal line. The length of the line depends on the value held by a counter. The line is contiguous throughout. That is - if the value is positive, the line will be extended horizontally to the right - if the value is negative the line would be drawn horizontally toward the left edge of the screen. the horizontal line length depending on the value generated, and the vertical lines being a constant value (say 15 pixels).

Example: A positive value of 10 is generated - the line needs to be drawn 10 pixels toward the right edge of the screen. The line then drops down (becomes a vertical line) for say 15 pixels in preparation for the next value received. The next value is a -20, therefore the line needs to be drawn 20 pixels toward the left edge of the screen. It then drops down another 15 pixels, ready for the next value.

Each turn, a value is generated, and the line is drawn either to the right(positive value) or to the left (neg).

As always, you guys are the greatest, and your help is greatly appreciated.

[Joshtek]

Multiple spaces get merged normally, you have to use the code tag:

                     ---------------->
                                      |
                         <------------| 
                         |
                         |---------------------->

I still don't know 100% what you want, but I expect you could generate it using a 1-pixel active object and the "paste into backdrop" facility. You make it paste multiple times at different positions using fast loops.

[delusan]

Boiling my lengthy question and example to a few words ... is there a way to draw a line from (for example) (100,50) to (200,50)?

[Joshtek]

Yes.

1. Create a 1-pixel object of the colour you desire
2. Create three fast loops: right, left and down
3. On fast loop right, increment X position by 1 and paste into background
4. On fast loop left, decrement X position by 1 and paste into background
5. On fast loop down, increment Y position by 1 and paste into background

Then you can run the right loop value( "Counter" ) times if the counter is positive or run the left abs(value( "Counter" )) times if it is negative. To make it move down 15 pixels, make it run the down loop 15 times.

[delusan]

Thanks Joshtek - works perfectly!