Slide image from x, y -> x2, y2

Question_dev · Post by **Question_dev** » Thu Apr 03, 2008 7:05 am

Hi,

I have searched everywhere, but cant find any thread about it.

How do i slide an image from 1 point (x, y) to another (x2, y2) ?
It has to be SLIDING.
I known how to blit images, etc.

Tnx in advance !

hibbyware · Post by **hibbyware** » Thu Apr 03, 2008 7:23 am

You don't know how to do that?

If not then you are seriously in the wrong forum,

Question_dev · Post by **Question_dev** » Thu Apr 03, 2008 7:36 am

Haha, 2nd april, funny. . . NOT

Sorry, but i'm a beginner. I've learned c a bit, and now i'm trying to code this, but can't figure it out. .

Tnx in advance

hibbyware · Post by **hibbyware** » Thu Apr 03, 2008 7:42 am

I think that's the point your missing this is not a beginners help forum,

These type of questions are just cluttering up the section and it makes it harder to find informaton,

jean · Post by **jean** » Thu Apr 03, 2008 7:53 am

Maybe noobs are fed of answers like "get lost!" and coders are sick of questions like "how can i compute the mean of three numbers?"
proposal: can't admins put a "PSP-Noob questions" area?? Maybe this way complex questions will not be lost in a sea of nonsenses.....

Question_dev · Post by **Question_dev** » Thu Apr 03, 2008 8:01 am

Just give me a tip so i can figure it out by myself.

Pirata Nervo · Post by **Pirata Nervo** » Thu Apr 03, 2008 8:07 am

You always need a tip

jo3_sum · Post by **jo3_sum** » Thu Apr 03, 2008 8:18 am

Question_dev wrote:Just give me a tip so i can figure it out by myself.

heres a tip:
know exactly what you want and you try figuring out how that will work.

jean · Post by **jean** » Thu Apr 03, 2008 8:23 am

xi,yi = initial coords
xf, yf = final coords
x, y = current coords

Code: Select all

float speed = 0.01;
float k;
for &#40;k = 0; k<=1; k+=speed&#41;&#123;
  x = &#40;int&#41; &#40;xi*&#40;1-k&#41;+xf*&#40;k&#41;&#41;;
  y = &#40;int&#41; &#40;yi*&#40;1-k&#41;+yf*&#40;k&#41;&#41;;
// ...blit image at x,y...
&#125;

...not to say that to do a GOOD animation code, this is only a bare hint...

PS: in future, PLEASE refer to one of the billion tutorials about game programming around....if you cannot do it on a PC, this doesn't mean you can do it on a PSP

cruisx · Post by **cruisx** » Thu Apr 03, 2008 8:24 am

jean wrote:Maybe noobs are fed of answers like "get lost!" and coders are sick of questions like "how can i compute the mean of three numbers?"
proposal: can't admins put a "PSP-Noob questions" area?? Maybe this way complex questions will not be lost in a sea of nonsenses.....

I second that =\ there should be a beginners section

jsharrad · Post by **jsharrad** » Thu Apr 03, 2008 9:42 am

http://www.google.com/search?hl=en&q=pr ... nner+forum

Lots of beginners "sections" already out there, I'm sure they're more than willing to help you with your simple questions.

I was under the impression this forum was for information specific to the PSP platform, whereas something like moving a sprite from point A to point B is more generic coding.

J.F. · Post by **J.F.** » Thu Apr 03, 2008 11:21 am

Well, if there were a beginner's forum, at least that should help cut down on threads to ignore. The problem would be that ignoring the beginner's forum would lead them to post in the regular forums anyway when they see the beginner's forum being ignored. So it may or may not help any.

Other than pissing off noobies, the current method of scorn and ridicule works pretty well, so any idea to replace it would have to do a better job of cutting down the number of noobie threads in the forums we care about.

jean · Post by **jean** » Thu Apr 03, 2008 7:05 pm

J.F. wrote:The problem would be that ignoring the beginner's forum would lead them to post in the regular forums anyway when they see the beginner's forum being ignored.

I would not bet on it.... there's always someone who wants some free glory boasting of his superiority in middle of poors; aside from this, maybe a noob is better than another (even remaining a noob) and can answer while learning. If there's an arbitrary rule ("no noob questions in dev forum"), it will be more easy to say "wrong place" without the need to be unkind, and saying to change section in a forum sounds better than "change forum"...

J.F. · Post by **J.F.** » Thu Apr 03, 2008 7:31 pm

Possibly. Won't know unless it gets tried. I'll leave the decision to the folks in charge. :)

Post by **jbit** » Thu Apr 03, 2008 9:18 pm

jean wrote:Maybe noobs are fed of answers like "get lost!" and coders are sick of questions like "how can i compute the mean of three numbers?"
proposal: can't admins put a "PSP-Noob questions" area?? Maybe this way complex questions will not be lost in a sea of nonsenses.....

This site isn't geared to beginners, there are many other places on the internet to learn basic programming.
ps2dev.org as a community is for PSP/PS2/PS3 development questions, not general development ones... As I've said before just because the code you're writing happens to be running on the PSP doesn't make it PSP code. Having said that advanced optimization techniques that aren't necessarily PSP related (and other such topics) are appropriate here.
The general ethos that used to exist in the ps2dev.org community before the PSP happened was that you should learn how to code relatively well before even stepping foot on a console, this seems to have been diluted now.
Also, holding hands isn't a good way to teach developers, it's more important for a developer to learn how to figure things out for themselves than to know how to move a sprite on screen. If they can't be bothered to do this, that's their problem.

(Yes this is a rant)

Jim · Post by **Jim** » Thu Apr 03, 2008 9:29 pm

pseudo code

Code: Select all

steps = 10

dx = &#40;endx - startx&#41; / steps
dy = &#40;endy - starty&#41; / steps

x = startx
y = starty

for c = 0 to steps
  draw&#40;x,y&#41;
  x += dx
  y += dy
next

Jim

jean · Post by **jean** » Thu Apr 03, 2008 10:02 pm

@jBit:
Don't tell me....i agree! I was only trying to figure it out HOW we can handle the tons of children only wanting to do something "cool" on their psp....
@jim:
UUUUUUUUUUUHHH... you optimized my code!!! Awesome!.....just kidding

Jim · Post by **Jim** » Thu Apr 03, 2008 10:10 pm

:-P

Jim