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CocaCola

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Posted: 8th Aug 2010 07:51

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This is my code

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load image "C:\Users\Dollie\Desktop\2dGame\MainPlayer\playerleft.png",1
backdrop on
sync on
sync rate 60
color backdrop RGB(255,255,255)
sprite 2,1,1,1
do
x=sprite x(2)
y=sprite y(2)
if leftkey()=1 then dec x
if rightkey()=1 then inc y
sync
loop

the sprite won't move left or right

DBpro 7.4-7.5
Sparky's collision DLL
Windows vista

I want coke, not Pepsi!

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Hodgey

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Posted: 8th Aug 2010 08:36

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Hi, I think you need to draw the sprite inside the loop, so move 'sprite 2,1,1,1' into your do-loop.

A clever person solves a problem, a wise person avoids it - Albert Einstein

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 8th Aug 2010 09:46

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load image "C:\Users\Dollie\Desktop\2dGame\MainPlayer\playerleft.png",1
backdrop on
sync on
sync rate 60
color backdrop RGB(255,255,255)
sprite 2,1,1,1
do
if leftkey()=1 then move sprite 2,-1
if rightkey()=1 then move sprite 2,1
sync
loop

I tried that but he moves up and down not left and right

I want coke, not Pepsi!

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Hodgey

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Location: Australia

Posted: 8th Aug 2010 10:51

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Ok, try this

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sync on : sync rate 60

xpos as integer = 320
ypos as integer = 240

load image "yourimage.bmp",1

do
    cls
    
    sprite 2, xpos, ypos, 1
    
    if leftkey()=1 then dec xpos, 2
    if rightkey()=1 then inc xpos, 2
    
    sync
    
loop

A clever person solves a problem, a wise person avoids it - Albert Einstein

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Neuro Fuzzy

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Posted: 8th Aug 2010 11:19

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Quote: "I tried that but he moves up and down not left and right"

to solve problems you have to problem solve. X is horizontal, Y is vertical.

Is't life, I ask, is't even prudence, to bore thyself and bore thy students?

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 8th Aug 2010 17:58 Edited at: 8th Aug 2010 18:07

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Quote: "to solve problems you have to problem solve. X is horizontal, Y is vertical."

I was thinking that but I thought you'd have to define those as variables.

EDIT: I tried this

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load image "C:\Users\Dollie\Desktop\2dGame\MainPlayer\playerleft.png",1
backdrop on
sync on
sync rate 60
color backdrop RGB(255,255,255)
sprite 2,1,1,1
do
if leftkey()=1 then move sprite 2,x-1
if rightkey()=1 then move sprite 2,x+1
sync
loop

and it didn't work, I also tried y-1 and y+1 and nothing. I know that Y is up/down but it was worth a shot

I want coke, not Pepsi!

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AJAtom

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Posted: 8th Aug 2010 19:14

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just take your original code and put in the command

sprite 1,x,y,1

at the end

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 8th Aug 2010 19:21 Edited at: 9th Aug 2010 00:29

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ok, thanks will try. I got it, also is this the best way of movement or is there an easier or faster or better way? Also my screen is green now that I made a camera and not white, and the text 1,1,screen fps is coming up with an error.

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load image "C:\Users\Dollie\Desktop\2dGame\MainPlayer\playerleft.png",1
backdrop on
sync on
sync rate screenfps
screenfps=60
color backdrop RGB(255,255,255)
sprite 2,320,240,1
make camera 1
position camera 1,320,240,0
do
text 1,1,screenfps
if leftkey()=1 then dec x
if rightkey()=1 then inc x
if upkey()=1 then dec y
if downkey()=1 then inc y
sprite 2,x,y,1
sync
loop

Also if I saved a sprite in .png would it already have alpha? Like would there be no white background or would I have to go into a program and remove the white and save as .png?

EDIT: since I can't bump yet this will be my bump for now

I want coke, not Pepsi!

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 9th Aug 2010 04:51 Edited at: 9th Aug 2010 05:05

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solved screen fps, and made it so it shows x and y co'ords. Now just need to know if my movement is the best/easiest/fastest way to doing things and the .png/alpha.
Code so far:

+ Code Snippet

load image "C:\Users\Dollie\Desktop\2dGame\MainPlayer\playerleft.png",1
backdrop on
autocam off
sync on
sync rate 60
color backdrop RGB(255,255,255)
sprite 2,320,240,1
make camera 1
x=320
y=240
INK RGB(255,255,0),RGB(0,0,255)
do
position camera 1,x,y,0
text 1,1,"FPS: " + str$(screen fps())
text 1,10,"x: " + str$(x)
text 1,20,"y: " + str$(y)
if leftkey()=1 then dec x
if rightkey()=1 then inc x
if upkey()=1 then dec y
if downkey()=1 then inc y
sprite 2,x,y,1
sync
loop

Also my camera doesn't follow my 2d sprite.

I want coke, not Pepsi!

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Derekioh

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Posted: 9th Aug 2010 22:07

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Your camera won't move because you need to implement a scrolling/Tile system. The way you are moving is good for now, but you will have to tweak it when your game gets larger. I suggest using functions as soon as possible because it makes debugging and changing small areas of code a LOT easier. Such as:

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backdrop on
autocam off
sync on
sync rate 60
color backdrop RGB(255,255,255)
INK RGB(255,255,0),RGB(0,0,255)
LoadMedia()
Gosub Variables

do
OnScreenInfo()
Controls()
UpdateObjects()
sync
loop

Variables:
Global x : x=320
Global y : y=240
Return

Function LoadMedia()
load image "C:\Users\Dollie\Desktop\2dGame\MainPlayer\playerleft.png",1
sprite 2,320,240,1
make camera 1
EndFunction

Function OnScreenInfo()
text 1,1,"FPS: " + str$(screen fps())
text 1,10,"x: " + str$(x)
text 1,20,"y: " + str$(y)
EndFunction

Function Controls()
if leftkey()=1 then dec x
if rightkey()=1 then inc x
if upkey()=1 then dec y
if downkey()=1 then inc y
EndFunction

Function UpdateObjects()
position camera 1,x,y,0
sprite 2,x,y,1
EndFunction

Incase you don't know:
1) calling the global command makes that variable usable in the entire program
2) calling the gosub command brings the program to a different place, breaking the top to bottom reading. It then returns to the place where it was called with the return command
3) calling the function command makes a command that you call whenever you want. It's useful for grouping similar code and if you have something you need to call more then once.

I hope this helps

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 9th Aug 2010 22:24

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I don't really want to use gosubs or gotos and I was thinking this, but it doesn't really work, why?

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load image "C:\Users\Dollie\Desktop\2dGame\MainPlayer\playerleft.png",1
backdrop on
autocam off
sync on
sync rate 60
color backdrop RGB(255,255,255)
sprite 1,320,240,1
make camera 1
x=20
y=40
z=0
make object plane 2,1,1
INK RGB(255,255,0),RGB(0,0,255)
do
xpos=object position x(2)
ypos=object position y(2)
zpos=object position z(2)
xpos=x
ypos=y
zpos=z
position camera 1,xpos,ypos,zpos
text 1,1,"FPS: " + str$(screen fps())
text 1,10,"x: " + str$(x)
text 1,20,"y: " + str$(y)
if leftkey()=1 then x=x-1
if rightkey()=1 then x=x+1
if upkey()=1 then y=y-1
if downkey()=1 then y=y+1
sprite 1,x,y,1
sync
loop

I tried to make a plane, position it where the sprite is, then position the camera where the plane is but the camera doesn't move.

I want coke, not Pepsi!

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 10th Aug 2010 06:27

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load image "C:\Users\Dollie\Desktop\2dGame\MainPlayer\playerleft.png",1
backdrop on
autocam off
sync on
sync rate 60
color backdrop RGB(255,255,255)
sprite 1,320,240,1
make camera 1
x=20
y=40
make object plane 2,1,1
ghost object on 2
INK RGB(255,255,0),RGB(0,0,255)
do
text 1,1,"FPS: " + str$(screen fps())
text 1,10,"x: " + str$(x)
text 1,20,"y: " + str$(y)
position object 2,x,y,1
if leftkey()=1 then x=x-1
if rightkey()=1 then x=x+1
if upkey()=1 then y=y-1
if downkey()=1 then y=y+1
sprite 1,x,y,1
position object 2,x,y,1
position camera 1,object position x(2),object position y(2),-40
sync
loop

I tried that, but the plane won't move.
Also how do I make the plane invisible? Ghost object on helps but.. not quite invisible

I want coke, not Pepsi!

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=PRoF=

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Joined: 17th Mar 2003

Location: Milton Keynes, UK

Posted: 10th Aug 2010 16:15 Edited at: 10th Aug 2010 16:17

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set alpha mapping on objNo, Alpha %

Where the alpha percentage goes from 0% (completely invisible) to 100% (completely visible)

hide object objNo

Simply hides the specified object

Hope that helps

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 10th Aug 2010 20:52

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@ProF thanks that helps, but do you know why my plane isn't moving with my sprite?

I want coke, not Pepsi!

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=PRoF=

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Joined: 17th Mar 2003

Location: Milton Keynes, UK

Posted: 10th Aug 2010 22:13 Edited at: 10th Aug 2010 22:14

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Try positioning the sprite using the object screen x() and object screen y() commands.

I think what you do is move the plane and the camera so that the plane is in the middle of the screen; and then position the sprite using the same co'ords, but on the 2d screen.

The difference between 2d and 3d being on a 640 x 480 screen, then 320,240 will always be in the centre of the screen regardless of how far away or what direction the camera is set to. (Sorry, thats prolly a really lousy explanation)

>Edit<
Actually, thinking about it, if you want the sprite to stay in the middle of the screen, then just use screen width()/2 and screen width()/2?

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 10th Aug 2010 22:38

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ProF can you show an example using my code? I don't really get it

I want coke, not Pepsi!

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 11th Aug 2010 04:27

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Bump

I want coke, not Pepsi!

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=PRoF=

21

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Joined: 17th Mar 2003

Location: Milton Keynes, UK

Posted: 11th Aug 2010 12:25

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cls rgb(255,0,0)
get image 1,0,0,32,32,1
cls rgb(0,0,0)
`load image "C:\Users\Dollie\Desktop\2dGame\MainPlayer\playerleft.png",1

for a=1 to 50
make object cube 2+a,10
position object 2+a,rnd(100),rnd(100),rnd(100)
next a

backdrop on
autocam off
sync on
sync rate 60
color backdrop RGB(255,255,255)
sprite 1,320,240,1
make camera 1
x=20
y=40
make object plane 2,1,1
ghost object on 2
INK RGB(255,255,0),RGB(0,0,255)
do
text 1,1,"FPS: " + str$(screen fps())
text 1,10,"x: " + str$(x)
text 1,20,"y: " + str$(y)
position object 2,x,y,1
if leftkey()=1 then x=x-1
if rightkey()=1 then x=x+1
if upkey()=1 then y=y-1
if downkey()=1 then y=y+1
sprite 1,x,y,1
position object 2,x,y,1
position camera 1,object position x(2),object position y(2),-40
sync
loop

This show what I was talking about.

The plane moves about the scenery boxes when the arrows are pressed.

The sprite moves about the screen when the arrows are pressed.

See how the 2 sets of co'ords don't match up?

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CocaCola

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Joined: 23rd Mar 2010

Location: CocaCola.x CocaCola.y CocaCola.z

Posted: 11th Aug 2010 21:43

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@ProF test out that code with one of your sprites, the plane moves slower than the sprite, so the sprite can move out of the screen.

I want coke, not Pepsi!

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=PRoF=

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Joined: 17th Mar 2003

Location: Milton Keynes, UK

Posted: 12th Aug 2010 03:28 Edited at: 12th Aug 2010 03:33

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Yes, I know... Thats what I was trying to explain; the difference between 2d (screen) co'ords and 3d (what you see through the camera) co'ords.

As I said earlier, try using object screen x() and object screen y() to position the sprite, or as the plane will ALWAYS be in the middle of the screen, simply use screen width()/2 and screen width()/2.

>edit<

To clear up any ambiguity simply replace this line

+ Code Snippet

sprite 1,x,y,1

with either

+ Code Snippet

sprite 1,object screen x(2),object screen y(2),1

or

+ Code Snippet

sprite 1,screen width()/2,screen height()/2,1

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