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Post Oekaki

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Tharky Registered 05/10/2009 Points 30	10th February, 2011 at 20:39:36 - Hello guys, I just encountered a problem about "drawing the way from Point A to Point B". I tried many ways to do that, changing the angle of a 1 pixel thick bar, looping and drawing 1 pixel until it reaches Point B... But it doesn't give me the best look / graphics. Newbie in Lua + 5 year experience with MMF = Still nothing...
GamesterXIII Registered 04/12/2008 Points 1110	10th February, 2011 at 22:58:25 - Try turning anti-aliasing on with that 1-pixel thick bar and make sure the rotation quality is 1. I've achieved this by scaling a bar that was a few pixels thick between two points, but I don't remember if I tried it with only 1 pixel. n/a
Tharky Registered 05/10/2009 Points 30	10th February, 2011 at 23:12:13 - Actually, I haven't managed to do the precise line... Newbie in Lua + 5 year experience with MMF = Still nothing...
~Matt Esch~ Stone Goose Registered 30/12/2006 Points 870	10th February, 2011 at 23:19:21 - I made this example a while ago http://mattesch.info/click/linedraw.zip http://create-games.com/project.asp?id=1875
Tharky Registered 05/10/2009 Points 30	10th February, 2011 at 23:24:02 - Originally Posted by ~Matt Esch~ I made this example a while ago http://mattesch.info/click/linedraw.zip Oh, Thanks a lot for the example Matt! This was exactly the thing I've asked. Thanks a lot. Sorry, I don't have any point to give you a trophy Newbie in Lua + 5 year experience with MMF = Still nothing...
GamesterXIII Registered 04/12/2008 Points 1110	11th February, 2011 at 16:37:50 - Originally Posted by ~Matt Esch~ I made this example a while ago http://mattesch.info/click/linedraw.zip Woah thats a little overly-complicated, but it works I guess . Why does the line jump around the line is drawn anywhere to the left? n/a
~Matt Esch~ Stone Goose Registered 30/12/2006 Points 870	11th February, 2011 at 19:00:21 - How would you simplify it? I do have a 1 line event that does it as well by taking dot products and wedge products to compute the angle of rotation. I am not sure what you mean by jumping around. Perhaps you refer to the slight unavoidable inaccuracy in the calculation? http://create-games.com/project.asp?id=1875
GamesterXIII Registered 04/12/2008 Points 1110	11th February, 2011 at 21:45:59 - I dunno. You're obviously more well versed in math than I am, but the line jumps around pretty bad when the line is drawn towards the left/upper left region of the screen. I just remember the one I made used a less conventional - possibly longer yet a bit simpler method and it worked flawlessly. I'll see if I can dig it up, but I really don't think I have it anymore . n/a
~Matt Esch~ Stone Goose Registered 30/12/2006 Points 870	11th February, 2011 at 22:03:46 - Perhaps this is more accurate. http://www.mattesch.info/click/linedraw2.zip http://create-games.com/project.asp?id=1875
GamesterXIII Registered 04/12/2008 Points 1110	11th February, 2011 at 22:08:18 - Thats much much much better . I actually came up with a method, but MMF loops aren't working properly for some reason - ie: they continue to run even if told to stop or even if a condition is no longer met =/. This happens to me randomly. Oh well- not like Its needed anymore anyways . Nice work. n/a
~Matt Esch~ Stone Goose Registered 30/12/2006 Points 870	11th February, 2011 at 22:15:57 - Well you say it's not needed, but some people might appreciate a simpler approach. Some people might be intimidated by expressions like (((LeftY( "Line" )-RightY( "Line" ))/Abs(LeftY( "Line" )-RightY( "Line" )))+0.5)/Abs(((LeftY( "Line" )-RightY( "Line" ))/Abs(LeftY( "Line" )-RightY( "Line" )))+0.5)ACos((RightX( "Line" )-LeftX( "Line" ))/Sqr(((RightX( "Line" )-LeftX( "Line" ))(RightX( "Line" )-LeftX( "Line" )))+((RightY( "Line" )-LeftY( "Line" ))*(RightY( "Line" )-LeftY( "Line" ))))) I wouldn't really condone a brute force rotate-until-it's-right approach though. http://create-games.com/project.asp?id=1875
GamesterXIII Registered 04/12/2008 Points 1110	11th February, 2011 at 22:45:51 - Yeah I don't know formulas like that so I take my own way out x_x. I'm really not a fan of workarounds, but when I can't comprehend whats going when coding something the proper way I sometimes have no choice. I just recently learned how to halfway use basic trig properly thanks to the atan2 function. I'm awful with stuff like that. Edited by GamesterXIII n/a
Jenswa Possibly Insane Registered 26/08/2002 Points 2722	12th February, 2011 at 22:08:10 - I would go with the Bresenham Line algorithm, since that's with what I am playing these days. But basically you need the slope to hop from spot to spot, and the slope is dy/dx where dx = the horizontal distance between the two points and dy = the vertical distance between the two points. Or read the wiki at http://en.wikipedia.org/wiki/Slope Maths is fun, but those expressions in mmf aren't. jenswa.neocities.org
UrbanMonk BRING BACK MITCH Registered 07/07/2008 Points 49567	12th February, 2011 at 22:31:22 - This will help with mmf math http://create-games.com/download.asp?id=7421 I use this all the time. n/a
GamesterXIII Registered 04/12/2008 Points 1110	13th February, 2011 at 00:44:43 - Originally Posted by UrbanMonk This will help with mmf math http://create-games.com/download.asp?id=7421 I use this all the time. Thanks, this is actually an amazing little app. I am a retard when it comes to using "other peoples work." I know this stuff has been around for ages, code is somewhat supposed to be shared, not protected, and that the work can't necessarily be tied to any one individual, but I am really weird (ieumb!). I guess I'll have to stop being dumb and just learn to deal with it and just give credit where its due . n/a

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