Image following line

[MindOfCorruption97]

Hi, I have a question about Images. Is there a way to make an image trace/follow a line? If so, can you please explain on how to do it? I want know how to make the image trace a line from point A to point B.

[Vladiedoo]

Reading parts of this might help you http://www.java-gaming.org/index.php?topic=25402.0. I have yet to add this feature myself so that is all I can provide, good luck!

[ReBirth]

Or you meant follow complex line like tower defense, with all of that curves?

Games published by our own members! Check 'em out!

[Roquen]

direction of line: D=|B-A|
parameterize:  F(t) =Dt+A
where 't' is on [0,1]

brain-dump untested pseudocode:

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public void setup(Vect2f a, Vect2f b) {   // store initial point  x0 = a.x;   y1 = a.y;   // compute and store direction of line  dx = b.x-x0;   dy = b.y-y0;   // compute and store length of the line segment  len = (float)(Math.sqrt(dx*dx+dy*dy));   // normalize direction  float t = 1.f/len;   dx *= t;   dy *= t; } /** Set 'r' to the blah, blah and returns 'r'. */ public Vect2f position(Vect2f r, float t) {   r.x = x0 + t*dx;   r.y = y0 + t*dy;     return r; }

[MindOfCorruption97]

I meant more of, just following a straight line.

[Phased]

Just set the y to a number and never change the y, but every update add to the x of the image.

If you want it to go up add to the y instead of the x.
Sorry if any spelling mistakes I'm on my phone

[ReBirth]

Never change X -> vertical move.
Never change Y -> horizontal move.

[Roquen]

I meant more of, just following a straight line.

All lines are straight.

[Jimmt]

Yeah I think he means any line not just vertical/horiz lines.

[MindOfCorruption97]

Yeah I think he means any line not just vertical/horiz lines.

Yea, that's what I was asking for. I understand how to make Vert and Horiz lines, just wondering how to make an image follow a line that has a certain amount of degrees to it.