rotate sprite - GameCreators Forum

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Lost Kid

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Posted: 10th May 2005 12:45 Edited at: 10th May 2005 12:45

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When i use rotate sprite in my code the sprite rotates around but also jumps upward like, was'nt quite sure how to make my sprites move left so i've been fiddeling around w/ this and just cant get it right can anyone help?.

+ Code Snippet

Rem Project: 2D Game
Rem Created: 5/9/2005 10:15:06 PM

Rem ***** Main Source File *****
VeryStart:
Sync On : Sync Rate 30
Load Image "Media/Player.bmp",1

Beginning:
Cls Rgb(0,0,0)
Sprite 1,200,200,1
Sync
Do
Cls Rgb(0,0,0)
If Upkey()=1 Then Move Sprite 1,+2
If Downkey()=1 Then Move Sprite 1,-2
If LeftKey()=1
Rotate Sprite 1,-80
Else
Rotate Sprite 1,0
If RightKey()=1
Rotate Sprite 1,+80
Else
Rotate Sprite 1,0
Endif
Endif
Sync
Loop

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UnderLord

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Posted: 10th May 2005 13:16

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Else
Rotate Sprite 1,0
i think if you get rid of that it might work

but im not sure check out my tutorial which has the rotate command in it search for "another tutorial"

When we talk to god, we're praying. When god talks to us, we're schizophrenic.
Schizophrenic beats eating alone.

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spooky

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Posted: 10th May 2005 22:47

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You don't use rotate sprite to move left and right. Easier to keep track of sprite position with variables.

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Sync On : Sync Rate 30
Load Image "Media/Player.bmp",1

x#=200
y#=200
s#=2.0

Do
   Cls Rgb(0,0,0)
   inc x#,(rightkey()-leftkey())*s#
   inc y#,(downkey()-upkey())*s#
   sprite 1,x#,y#,1
   Sync
Loop

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pizzaman

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Posted: 10th May 2005 22:50

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The reason the sprite jumps is because the point at which the sprite rotates is the top-left corner, not the center of the sprite. You can use the offset sprite command to specify where the sprite will rotate from.

I'm not too sure the way you want your sprite to move, but I modified your example code a little to how I think you want it to move.

+ Code Snippet

Rem Project: 2D Game
Rem Created: 5/9/2005 10:15:06 PM

Rem ***** Main Source File *****
VeryStart:
Sync On
Sync Rate 30

Cls Rgb(0,255,0)
center text 32,0,"This way"
center text 32,15,"Up"
get Image 1,0,0,64,64,1

Beginning:
Cls Rgb(0,0,0)
Sprite 1,200,200,1
offset sprite 1,sprite width(1) / 2,sprite height(1) / 2
Sync

Do
   Cls Rgb(0,0,0)

   If Upkey()=1 Then Move Sprite 1,2
   If Downkey()=1 Then Move Sprite 1,-2

   If LeftKey()=1 then angle# = angle# - 5.0
   If RightKey()=1 then angle# = angle# + 5.0

   rotate sprite 1,angle#

   Sync
Loop

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spooky

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Posted: 10th May 2005 22:51

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Or if you want to control sprite like a car, you do use rotate sprite:

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Sync On : Sync Rate 30
Load Image "Media/Player.bmp",1
sprite 1,200,200,1
offset sprite 1,sprite width(1)/2,sprite width(1)/2

s#=2.0

Do
   Cls Rgb(0,0,0)
   if upkey() then move sprite 1,s#
   if downkey() then move sprite 1,-s#
   if leftkey() then rotate sprite 1,wrapvalue(sprite angle(1)-s#)
   if rightkey() then rotate sprite 1,wrapvalue(sprite angle(1)+s#)
   Sync
Loop

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Lost Kid

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Posted: 11th May 2005 02:14

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@pizzaman

Thats exactly the way I needed it thank you so much!

@spooky's 2nd post

Thats almost the same as pizzaman's code, but thanks for showing me your code, cause I or someone else could use it for making a little fun 2d game.

Thanks Everyone!,
LK

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2D All the way! / rotate sprite

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