Maps and Movement - GameCreators Forum

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vgking101

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Joined: 10th Apr 2005

Location: Virginia

Posted: 10th Apr 2005 11:19

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Can i have a flattened 3d map and have a 2d character move on it? And how do i make something move across a map instead of the screen?

If i just posted this sorry, i couldn't find it lol.

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kRx

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Joined: 2nd Apr 2005

Location: Canterbury, Kent, UK

Posted: 10th Apr 2005 22:47

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u have to use 3d objects on 3d maps DB has some models included in the media

+ Code Snippet

`setup stuff
sync on
sync rate 30
set display mode 800,600,16

load object "idle.x",1
`loads the object u want and numbers it 1
position object 1,100,0,100
`posiitons it where u want along x,y,z
yrotate object 1,180
`turns it so its facing upwards (180 = degrees)
fix object pivot 1

`makes a little matrix et etc im guessing u know matrixes
make matrix 1,200,200,25,25
load image "grass15.bmp",1
prepare matrix texture 1,1,1,1

do

`few commands to move it about

aY# = Object angle Y(1)
if upkey()=1 then loop object 1,5,50
if Upkey()=1 then move object 1,+6
if Downkey()=1 then move object 1,-6

If Leftkey()=1
Yrotate object 1,Wrapvalue(aY#-10)
Endif

If Rightkey()=1
Yrotate object 1,Wrapvalue(aY#+10)
Endif

`code for camera
X# = Object position x(1)
Z# = Object position z(1)

Rem get new camera position and store in cZ# and cX#
cZ# = Newzvalue(Z#,aY#-180,100)
cX# = Newxvalue(X#,aY#-180,100)

Position Camera cX#,75,cZ#
Point camera X#,50,Z#

sync
loop

hope thats what ur lookin for

kR

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Sephnroth

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Joined: 10th Oct 2002

Location: United Kingdom

Posted: 11th Apr 2005 00:47

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If I understood you right, you want a top-down 3d world with a 2d character to move around it?

Create a 3d world like you would any other, but obviously without ceilings etc. Then use the camera rotation commands and place the camera above your world, pointing down. (if your map is one big object i THINK theres a command to make the camera look at an object which would center it in the view nicely).

The way to get a 2d character in a 3d world is by making an object called a plane and loading your 2d sprite as a texture and using it to texture the plane. Keep the plane facing the camera at all times. to move it around the world you change its X and Z co-oridinates, NOT x and y like you would a real sprite. Hope thats some help, its been a while since i used dbp

[07:16:59-pm] « Sephnroth » you were dreaming about lee...
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kRx

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Location: Canterbury, Kent, UK

Posted: 11th Apr 2005 02:07

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bad idea using a matrix as a top down map as it uses up a lot of memory there are a few examples thati found helpful in the 2d forums for maps but they involve arrays. Have a look

kR

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vgking101

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Location: Virginia

Posted: 11th Apr 2005 03:55

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Thanks for the help but i dont want it top down. I want it sideways. Its a biking game and i want to see the 2d biker sprite on the 3d world from the side. Is it possible to do hit test things with the sprite and map?

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kRx

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Location: Canterbury, Kent, UK

Posted: 11th Apr 2005 06:02

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from what im aware 3d objects and 2d objects cant work togather i may be wrong if anyoine whats to question what im saying.. not really sure what to say to help sorry

kR

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vgking101

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Location: Virginia

Posted: 11th Apr 2005 06:05

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well that's ok. I can use a 2d map.

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HWT

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Joined: 1st Apr 2005

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Posted: 11th Apr 2005 08:10

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Hi

I'm not exactly sure what you are looking for but I typed out this code that be of some use:

+ Code Snippet

REM ************************************************************************************
REM SIMPLE 2D CAMERA
REM By: HWT    Date: 11th April 2005
REM This shows a simple 2d camera following a 3D object
REM ************************************************************************************

REM PROGRAM INIT
sync on : sync rate 0 : hide mouse
`Make player
make object cube 1,50
yrotate object 1,90
`Make matrix
make matrix 1,2500,2500,15,15

REM MAIN PROGRAM LOOP
do

`Handle movement
if rightkey()=1 then inc spd#,0.75
if leftkey()=1 then dec spd#,0.5
move object 1,spd#

`Update camera
position camera object position x(1),object position y(1)+60,object position z(1)-400

`Output
set cursor 0,0 : print "SPEED:";str$(spd#)+"kmph"
sync : loop

Quote: "Is it possible to do hit test things with the sprite and map? "

In DBC, it's not possible to have 2D sprites collide with 3D. But, instead you can make a 3D object act like (i.e. look like) a 2D sprite.

If you want to know more, please don't hesitate to ask.

Cheers!

HelloWorld Tommorrow

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vgking101

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Posted: 11th Apr 2005 08:29

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So:

can i have a biker. 2d
a level, 2d. The level is what the biker will ride across.
A background BEHIND the level for added effect. The level will be scollable.

See attachment.

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NanoBrain

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Location: Portland, OR

Posted: 11th Apr 2005 14:41 Edited at: 12th Apr 2005 00:19

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vgking101,

You can achieve your goal even with a 3D background. For 3D, use a plane as the image of the biker, changing it's textures as needed, for animation. Create and place a 3D scene around for the camera to see. With this, for scrolling you have the choice of moving the camera and the biker along with it. Or, scrolling just the background and keeping the camera and biker in place, maybe somewhat.

With a 2D background, I suggest using a sprite for the biker image, also changing it's image when needed, for animation. For the background paste an image over and over, changing it's coordinates for a scrolling effect. I'm not sure what friction this would have on the processor.

I truly suggest to go with the plane and a 3D background, because in DarkBasic at least, a sprite simply cannot be rotated.

+NanoBrain+

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DarkBASIC Discussion / Maps and Movement

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