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AppGameKit Classic Chat / Multiplayer Sprite movement settings help

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Alex Goaga
9
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Joined: 6th Nov 2015
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Posted: 29th Jan 2016 11:36
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Hi guys, I have a question regarding the sprite movement in multiplayer , by using the Accelerometer / keyboard arrows.

The basic multiplayer code is here : https://www.appgamekit.com/documentation/examples/multiplayer/0_getting_started.htm

My question is , after switching on SetVirtualResolution(1024, 768 ) or more, the sprite speed has decreased very much. Where or how do I increase the speed of arrow keys or Accelerometer ?

I tried this but the sprite does not recognize my inputs after modifying it.

x# = GetSpriteX ( 1 )
x# = x# + 20.0
SetSpriteX ( 1, x# )

Thank you for your time
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BatVink
Moderator
21
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Joined: 4th Apr 2003
Location: Gods own County, UK
Posted: 29th Jan 2016 11:42
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The movement is in virtual pixels. If you increase the screen width from 640 to 1980, it will take 3 times longer to get across.

Your design process should be:

1. Decide on virtual resolution
2. Write movement and positioning code or this resolution

If you are likely to alter your virtual resolution, then include a small calculation at the top of your program, something like:

speedMultiplier# = getVirtualWidth() / 640.0

and in your code,

setSpriteX(1, x# + (20 * speedMultiplier#))
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Digital Awakening
AGK Developer
22
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Joined: 27th Aug 2002
Location: Sweden
Posted: 29th Jan 2016 11:47
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When you use SetVirtualResolution(1024, 768 ) you change the internal coordinate system from 100x100 to 1024x768. This will drastically change everything that are based on pixels such as size, position and physics.

You need to add multipliers to these lines:
x# = GetSpriteX ( 1 ) + GetDirectionX ( )
y# = GetSpriteY ( 1 ) + GetDirectionY ( )

Like so for example:
x# = GetSpriteX ( 1 ) + GetDirectionX ( ) * 10.0
y# = GetSpriteY ( 1 ) + GetDirectionY ( ) * 10.0
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