Hello all, here comes a probably totally stupid question, but it''s been bothering me for absolutley ages, so here goes
...
Say we have, in a 2D world, a ball. We want this ball to move somewhere, let''s say where the user clicks the mouse on the screen. We know the X and Y of our ball, and the X and Y of where the mouse was clicked... So, in order to get our Ball from its origin (let''s say x1, y1) along a line to it''s destination (x2, y2), we can find the difference in Y and X points, like so: (x2 - x1, y2 - y1). If we add our distance_x to the X of our ball, and the distance_y to the Y of our ball, we get to our destination, right? (Yes, i''m long winded, I know
). My problem comes with actually moving the buggering thing at a constant speed along this line... I know how to get the length of the line... well, sqrt(xdist*xdist + ydist*ydist) seems to work pretty 100% fine
. BUT, simply moving the ball at a constant speed along the line every loop is causing me a real headache... I know it''s probably very very easy, seeing as 2D game ever uses it (I dunno, like a bullet in... er... Turrican, on the Amiga??). Is it also something to do with angles, and therefore trigonometry? I''m sure I have a hazy view of what to do, but everything i try results in failure
. All i need to know is the methods of implementing it, which surely aren''t too language & code specific... it''s just maths... seeing as I suck at maths, i''m stuck
. I hope I''ve made some sense here, and if not, i''ll just have to take the flak and try again
Cheers for trying to understand my stupid ways!
Nick - Head Designer, Llamasoft.net
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