[Dark Physics] How do I use the timer commands?

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Lukas W

20

Years of Service

User Offline

Joined: 5th Sep 2003

Location: Sweden

Posted: 19th Aug 2008 22:47

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I really don't understand how to use the timer commands in DP.
I would appreciate it if you shared any knowledge you might have regarding this.

The "PHY SET AUTO FIXED TIMING" will not perform as well on 60fps as it does on 100+ fps. Why, I don't know.

In the test I just wrote, you will be able to see that there is a long lag each time the fps drops to 60fps, and when it rise to 100+ fps (Depending on how high fps you can get on your computer).

` DarkPhysics timer based movement tests.

SyncRate = 60
Sync On
Sync Rate SyncRate

AutoCam Off
Color Backdrop RGB( 0, 128, 255 )
Ink RGB( 0, 64, 0 ), 0
Set Point Light 0, 0, 0, 0

Phy Start

Phy Set Auto Fixed Timing

` floor
For x = 1 To 10 : For y = 1 To 10
    Inc o
    Make Object Box o, 10, 10, 10
    Position Object o, ((x*10)-50), -5+(rnd(5.0)), ((y*10)-50)
    Rotate Object o, rnd(90), rnd(90), rnd(90)
    Color Object o, RGB( 128, 255, 128 )
    Phy Make Rigid Body Static Box o
Next : Next

` Walls
For x = 101 To 105
    Make Object Box x, 100, 100, 5
    yRotate Object x, angle
    Phy Make Rigid Body Static Box x
    Hide Object x
    Inc angle, 90
Next x
Phy Set Rigid Body Position 101, 0, 50, 50
Phy Set Rigid Body Position 102, 50, 50, 0
Phy Set Rigid Body Position 103, 0, 50, -50
Phy Set Rigid Body Position 104, -50, 50, 0
Phy Set Rigid Body Position 105, 0, 100, 0 : Phy Set Rigid Body Rotation 105, 90, 0, 0

` falling object
Make Object Sphere 110, 10, 8, 8
Position Object 110, 0, 50, 0
Phy Make Rigid Body Dynamic Sphere 110

` camera
Position Camera -50, 50, -50
Point Camera 0, 0, 0

PhysicsTime# = Timer()
Do
    ` info 1
        Set Cursor 0, 0
        Print "FPS:         ", Screen FPS()
    
    ` light     position
                    Inc LightCount
                    x# = (x# + Sin(LightCount)) : y# = 50 : z# = (z# + Cos(LightCount))
                    Position Light 0, x#, y#, z#
                    
    ` sphere    add force on spacekey
                    If SpaceKey() And SpakeCey=0
                        SpakeCey =1
                        Phy Add Rigid Body Force 110, 0, 100, 0, 2
                    EndIf
                    If Not SpaceKey() Then SpakeCey =0
    
    ` syncrate  change between 60 and 0
                    If MouseClick() =1 And MouseClikc =0
                        MouseClikc =1
                        Inc SyncRate, 60
                        If SyncRate > 60 Then SyncRate = 0
                        Sync Rate SyncRate
                    EndIf
                    If MouseClick() <> 1 Then MouseClikc =0
    
    ` camera    rotate
                    oldx# = Camera Angle X() : oldy# = Camera Angle Y() : oldz# = Camera Angle Z()
                    Point Camera Object Position X(110), Object Position Y(110), Object Position Z(110)
                    newx# = Camera Angle X() : newy# = Camera Angle Y() : newz# = Camera Angle Z()
                    Rotate Camera oldx#, oldy#, oldz#
                    Rotate Camera CurveAngle( newx#, oldx#, 80.0 ), CurveAngle( newy#, oldy#, 80.0 ), 0.0
                    
                    
    
    ` info 2
        Set Cursor 0, 500
        Print "Sync Rate:   ", SyncRate
        Print "Time Lapse:  ", Time#

Phy Update
    Sync
    
    New# = Timer() - PhysicsTime#
    If New# <> Time#
        Time# = New#
        PhysicsTime# = Timer()
    EndIf
Loop

+ Code Snippet

` DarkPhysics timer based movement tests.

SyncRate = 60
Sync On
Sync Rate SyncRate

AutoCam Off
Color Backdrop RGB( 0, 128, 255 )
Ink RGB( 0, 64, 0 ), 0
Set Point Light 0, 0, 0, 0


Phy Start

Phy Set Auto Fixed Timing




` floor
For x = 1 To 10 : For y = 1 To 10
    Inc o
    Make Object Box o, 10, 10, 10
    Position Object o, ((x*10)-50), -5+(rnd(5.0)), ((y*10)-50)
    Rotate Object o, rnd(90), rnd(90), rnd(90)
    Color Object o, RGB( 128, 255, 128 )
    Phy Make Rigid Body Static Box o
Next : Next

` Walls
For x = 101 To 105
    Make Object Box x, 100, 100, 5
    yRotate Object x, angle
    Phy Make Rigid Body Static Box x
    Hide Object x
    Inc angle, 90
Next x
Phy Set Rigid Body Position 101, 0, 50, 50
Phy Set Rigid Body Position 102, 50, 50, 0
Phy Set Rigid Body Position 103, 0, 50, -50
Phy Set Rigid Body Position 104, -50, 50, 0
Phy Set Rigid Body Position 105, 0, 100, 0 : Phy Set Rigid Body Rotation 105, 90, 0, 0


` falling object
Make Object Sphere 110, 10, 8, 8
Position Object 110, 0, 50, 0
Phy Make Rigid Body Dynamic Sphere 110


` camera
Position Camera -50, 50, -50
Point Camera 0, 0, 0



PhysicsTime# = Timer()
Do
    ` info 1
        Set Cursor 0, 0
        Print "FPS:         ", Screen FPS()
    
    ` light     position
                    Inc LightCount
                    x# = (x# + Sin(LightCount)) : y# = 50 : z# = (z# + Cos(LightCount))
                    Position Light 0, x#, y#, z#
                    
    ` sphere    add force on spacekey
                    If SpaceKey() And SpakeCey=0
                        SpakeCey =1
                        Phy Add Rigid Body Force 110, 0, 100, 0, 2
                    EndIf
                    If Not SpaceKey() Then SpakeCey =0
    
    ` syncrate  change between 60 and 0
                    If MouseClick() =1 And MouseClikc =0
                        MouseClikc =1
                        Inc SyncRate, 60
                        If SyncRate > 60 Then SyncRate = 0
                        Sync Rate SyncRate
                    EndIf
                    If MouseClick() <> 1 Then MouseClikc =0
    
    ` camera    rotate
                    oldx# = Camera Angle X() : oldy# = Camera Angle Y() : oldz# = Camera Angle Z()
                    Point Camera Object Position X(110), Object Position Y(110), Object Position Z(110)
                    newx# = Camera Angle X() : newy# = Camera Angle Y() : newz# = Camera Angle Z()
                    Rotate Camera oldx#, oldy#, oldz#
                    Rotate Camera CurveAngle( newx#, oldx#, 80.0 ), CurveAngle( newy#, oldy#, 80.0 ), 0.0
                    
                    
    
    ` info 2
        Set Cursor 0, 500
        Print "Sync Rate:   ", SyncRate
        Print "Time Lapse:  ", Time# 

    Phy Update
    Sync
    
    New# = Timer() - PhysicsTime#
    If New# <> Time#
        Time# = New#
        PhysicsTime# = Timer()
    EndIf
Loop

Please feel free to experiment around this subject.

I allways afraided from a clowns. aww..

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Lukas W

20

Years of Service

User Offline

Joined: 5th Sep 2003

Location: Sweden

Posted: 19th Aug 2008 23:09

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Now it gives the same result on 60fps as it does on 500fps

` DarkPhysics timer based movement tests.

` Test 2.
`   Manual timing

SyncRate = 60
Sync On
Sync Rate SyncRate

AutoCam Off
Color Backdrop RGB( 0, 128, 255 )
Ink RGB( 0, 64, 0 ), 0
Set Point Light 0, 0, 0, 0

Phy Start
Phy Set Continuous CD 1

` floor
For x = 1 To 10 : For y = 1 To 10
    Inc o
    Make Object Box o, 10, 10, 10
    Position Object o, ((x*10)-50), -5+(rnd(5.0)), ((y*10)-50)
    Rotate Object o, rnd(90), rnd(90), rnd(90)
    Color Object o, RGB( 128, 255, 128 )
    Phy Make Rigid Body Static Box o
Next : Next

` Walls
For x = 101 To 105
    Make Object Box x, 100, 100, 5
    yRotate Object x, angle
    Phy Make Rigid Body Static Box x
    Hide Object x
    Inc angle, 90
Next x
Phy Set Rigid Body Position 101, 0, 50, 50
Phy Set Rigid Body Position 102, 50, 50, 0
Phy Set Rigid Body Position 103, 0, 50, -50
Phy Set Rigid Body Position 104, -50, 50, 0
Phy Set Rigid Body Position 105, 0, 100, 0 : Phy Set Rigid Body Rotation 105, 90, 0, 0

` falling object
Make Object Sphere 110, 10, 8, 8
Position Object 110, 0, 50, 0
Phy Make Rigid Body Dynamic Sphere 110

` camera
Position Camera -50, 50, -50
Point Camera 0, 0, 0

startTime# = Timer()
timerA# = Timer()
Do
    ` info 1
        Set Cursor 0, 0
        Print "FPS:         ", Screen FPS()
    
    ` light     position
                    Inc LightCount
                    x# = (x# + Sin(LightCount)) : y# = 50 : z# = (z# + Cos(LightCount))
                    Position Light 0, x#, y#, z#
                    
    ` sphere    add force on spacekey
                    If SpaceKey() And SpakeCey=0
                        SpakeCey =1
                        Phy Add Rigid Body Force 110, 0, 100, 0, 2
                    EndIf
                    If Not SpaceKey() Then SpakeCey =0
    
    ` syncrate  change between 60 and 0
                    If MouseClick() =1 And MouseClikc =0
                        MouseClikc =1
                        Inc SyncRate, 60
                        If SyncRate > 60 Then SyncRate = 0
                        Sync Rate SyncRate
                    EndIf
                    If MouseClick() <> 1 Then MouseClikc =0
    
    ` camera    rotate
                    oldx# = Camera Angle X() : oldy# = Camera Angle Y() : oldz# = Camera Angle Z()
                    Point Camera Object Position X(110), Object Position Y(110), Object Position Z(110)
                    newx# = Camera Angle X() : newy# = Camera Angle Y() : newz# = Camera Angle Z()
                    Rotate Camera oldx#, oldy#, oldz#
                    Rotate Camera CurveAngle( newx#, oldx#, 80.0 ), CurveAngle( newy#, oldy#, 80.0 ), 0.0
                    
                    
    
    ` info 2
        Set Cursor 0, 500
        Print "Sync Rate:   ", SyncRate
        Print "Time Step ", timerC#/1000

TimerB# = Timer() - TimerA#
    If TimerB# <> TimerC#
        TimerC# = TimerB#
        TimerA# = Timer()
    EndIf

elapsedTime# = Timer() - startTime#
    PHY SET FIXED TIMING elapsedTime#
    PHY SET TIMING timerC#/1000, 8, 0
    Phy Update
    Sync
Loop

+ Code Snippet

` DarkPhysics timer based movement tests.

` Test 2.
`   Manual timing

SyncRate = 60
Sync On
Sync Rate SyncRate

AutoCam Off
Color Backdrop RGB( 0, 128, 255 )
Ink RGB( 0, 64, 0 ), 0
Set Point Light 0, 0, 0, 0


Phy Start
Phy Set Continuous CD 1


` floor
For x = 1 To 10 : For y = 1 To 10
    Inc o
    Make Object Box o, 10, 10, 10
    Position Object o, ((x*10)-50), -5+(rnd(5.0)), ((y*10)-50)
    Rotate Object o, rnd(90), rnd(90), rnd(90)
    Color Object o, RGB( 128, 255, 128 )
    Phy Make Rigid Body Static Box o
Next : Next

` Walls
For x = 101 To 105
    Make Object Box x, 100, 100, 5
    yRotate Object x, angle
    Phy Make Rigid Body Static Box x
    Hide Object x
    Inc angle, 90
Next x
Phy Set Rigid Body Position 101, 0, 50, 50
Phy Set Rigid Body Position 102, 50, 50, 0
Phy Set Rigid Body Position 103, 0, 50, -50
Phy Set Rigid Body Position 104, -50, 50, 0
Phy Set Rigid Body Position 105, 0, 100, 0 : Phy Set Rigid Body Rotation 105, 90, 0, 0


` falling object
Make Object Sphere 110, 10, 8, 8
Position Object 110, 0, 50, 0
Phy Make Rigid Body Dynamic Sphere 110


` camera
Position Camera -50, 50, -50
Point Camera 0, 0, 0



startTime# = Timer()
timerA# = Timer()
Do
    ` info 1
        Set Cursor 0, 0
        Print "FPS:         ", Screen FPS()
    
    ` light     position
                    Inc LightCount
                    x# = (x# + Sin(LightCount)) : y# = 50 : z# = (z# + Cos(LightCount))
                    Position Light 0, x#, y#, z#
                    
    ` sphere    add force on spacekey
                    If SpaceKey() And SpakeCey=0
                        SpakeCey =1
                        Phy Add Rigid Body Force 110, 0, 100, 0, 2
                    EndIf
                    If Not SpaceKey() Then SpakeCey =0
    
    ` syncrate  change between 60 and 0
                    If MouseClick() =1 And MouseClikc =0
                        MouseClikc =1
                        Inc SyncRate, 60
                        If SyncRate > 60 Then SyncRate = 0
                        Sync Rate SyncRate
                    EndIf
                    If MouseClick() <> 1 Then MouseClikc =0
    
    ` camera    rotate
                    oldx# = Camera Angle X() : oldy# = Camera Angle Y() : oldz# = Camera Angle Z()
                    Point Camera Object Position X(110), Object Position Y(110), Object Position Z(110)
                    newx# = Camera Angle X() : newy# = Camera Angle Y() : newz# = Camera Angle Z()
                    Rotate Camera oldx#, oldy#, oldz#
                    Rotate Camera CurveAngle( newx#, oldx#, 80.0 ), CurveAngle( newy#, oldy#, 80.0 ), 0.0
                    
                    
    
    ` info 2
        Set Cursor 0, 500
        Print "Sync Rate:   ", SyncRate
        Print "Time Step ", timerC#/1000

    TimerB# = Timer() - TimerA#
    If TimerB# <> TimerC#
        TimerC# = TimerB#
        TimerA# = Timer()
    EndIf

    elapsedTime# = Timer() - startTime#
    PHY SET FIXED TIMING elapsedTime#
    PHY SET TIMING timerC#/1000, 8, 0
    Phy Update
    Sync
Loop

But it is too fast.

Hmm.. Anyway, I'm getting close I think.

I allways afraided from a clowns. aww..

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Lukas W

20

Years of Service

User Offline

Joined: 5th Sep 2003

Location: Sweden

Posted: 19th Aug 2008 23:15 Edited at: 19th Aug 2008 23:20

Link

It appears that by changing the nr. of iterations each loop from 8 (default) down to 2, I am able to get a solid "60fps" feel to the physics. Undependent on Screen FPS.

` DarkPhysics timer based movement tests.

` Test 2.
`   Manual timing

SyncRate = 60
Sync On
Sync Rate SyncRate

AutoCam Off
Color Backdrop RGB( 0, 128, 255 )
Ink RGB( 0, 64, 0 ), 0
Set Point Light 0, 0, 0, 0

Phy Start
Phy Set Continuous CD 1

` floor
For x = 1 To 10 : For y = 1 To 10
    Inc o
    Make Object Box o, 10, 10, 10
    Position Object o, ((x*10)-50), -5+(rnd(5.0)), ((y*10)-50)
    Rotate Object o, rnd(90), rnd(90), rnd(90)
    Color Object o, RGB( 128, 255, 128 )
    Phy Make Rigid Body Static Box o
Next : Next

` Walls
For x = 101 To 105
    Make Object Box x, 100, 100, 5
    yRotate Object x, angle
    Phy Make Rigid Body Static Box x
    Hide Object x
    Inc angle, 90
Next x
Phy Set Rigid Body Position 101, 0, 50, 50
Phy Set Rigid Body Position 102, 50, 50, 0
Phy Set Rigid Body Position 103, 0, 50, -50
Phy Set Rigid Body Position 104, -50, 50, 0
Phy Set Rigid Body Position 105, 0, 100, 0 : Phy Set Rigid Body Rotation 105, 90, 0, 0

` falling object
Make Object Sphere 110, 10, 8, 8
Position Object 110, 0, 50, 0
Phy Make Rigid Body Dynamic Sphere 110

` camera
Position Camera -50, 50, -50
Point Camera 0, 0, 0

` Timer Based Physics Variables
        startTime# = Timer()        ` variable to determine how long the application has ran (in MS)
        timerA# = Timer()           ` variable to help calculate time step

Do
    ` info 1
        Set Cursor 0, 0
        Print "FPS:         ", Screen FPS()
    
    ` light     position
                    Inc LightCount
                    x# = (x# + Sin(LightCount)) : y# = 50 : z# = (z# + Cos(LightCount))
                    Position Light 0, x#, y#, z#
                    
    ` sphere    add force on spacekey
                    If SpaceKey() And SpakeCey=0
                        SpakeCey =1
                        Phy Add Rigid Body Force 110, 0, 100, 0, 2
                    EndIf
                    If Not SpaceKey() Then SpakeCey =0
    
    ` syncrate  change between 60 and 0
                    If MouseClick() =1 And MouseClikc =0
                        MouseClikc =1
                        Inc SyncRate, 60
                        If SyncRate > 60 Then SyncRate = 0
                        Sync Rate SyncRate
                    EndIf
                    If MouseClick() <> 1 Then MouseClikc =0
    
    ` camera    rotate
                    oldx# = Camera Angle X() : oldy# = Camera Angle Y() : oldz# = Camera Angle Z()
                    Point Camera Object Position X(110), Object Position Y(110), Object Position Z(110)
                    newx# = Camera Angle X() : newy# = Camera Angle Y() : newz# = Camera Angle Z()
                    Rotate Camera oldx#, oldy#, oldz#
                    Rotate Camera CurveAngle( newx#, oldx#, 80.0 ), CurveAngle( newy#, oldy#, 80.0 ), 0.0
                    
                    
    
    ` info 2
        Set Cursor 0, 500
        Print "Sync Rate:   ", SyncRate
        Print "Time Step ", timerC#/1000

` Timer Based Physics
                    TimerB# = Timer() - TimerA#
                    If TimerB# <> TimerC#
                        TimerC# = TimerB#
                        TimerA# = Timer()
                    EndIf
                    elapsedTime# = Timer() - startTime#
    
                    PHY SET FIXED TIMING elapsedTime#
                    PHY SET TIMING timerC#/1000, 2, 0
                    
    ` Refresh
        Phy Update
        Sync
Loop

+ Code Snippet

` DarkPhysics timer based movement tests.

` Test 2.
`   Manual timing

SyncRate = 60
Sync On
Sync Rate SyncRate

AutoCam Off
Color Backdrop RGB( 0, 128, 255 )
Ink RGB( 0, 64, 0 ), 0
Set Point Light 0, 0, 0, 0


Phy Start
Phy Set Continuous CD 1


` floor
For x = 1 To 10 : For y = 1 To 10
    Inc o
    Make Object Box o, 10, 10, 10
    Position Object o, ((x*10)-50), -5+(rnd(5.0)), ((y*10)-50)
    Rotate Object o, rnd(90), rnd(90), rnd(90)
    Color Object o, RGB( 128, 255, 128 )
    Phy Make Rigid Body Static Box o
Next : Next

` Walls
For x = 101 To 105
    Make Object Box x, 100, 100, 5
    yRotate Object x, angle
    Phy Make Rigid Body Static Box x
    Hide Object x
    Inc angle, 90
Next x
Phy Set Rigid Body Position 101, 0, 50, 50
Phy Set Rigid Body Position 102, 50, 50, 0
Phy Set Rigid Body Position 103, 0, 50, -50
Phy Set Rigid Body Position 104, -50, 50, 0
Phy Set Rigid Body Position 105, 0, 100, 0 : Phy Set Rigid Body Rotation 105, 90, 0, 0


` falling object
Make Object Sphere 110, 10, 8, 8
Position Object 110, 0, 50, 0
Phy Make Rigid Body Dynamic Sphere 110


` camera
Position Camera -50, 50, -50
Point Camera 0, 0, 0



` Timer Based Physics Variables
        startTime# = Timer()        ` variable to determine how long the application has ran (in MS)
        timerA# = Timer()           ` variable to help calculate time step


Do
    ` info 1
        Set Cursor 0, 0
        Print "FPS:         ", Screen FPS()
    
    ` light     position
                    Inc LightCount
                    x# = (x# + Sin(LightCount)) : y# = 50 : z# = (z# + Cos(LightCount))
                    Position Light 0, x#, y#, z#
                    
    ` sphere    add force on spacekey
                    If SpaceKey() And SpakeCey=0
                        SpakeCey =1
                        Phy Add Rigid Body Force 110, 0, 100, 0, 2
                    EndIf
                    If Not SpaceKey() Then SpakeCey =0
    
    ` syncrate  change between 60 and 0
                    If MouseClick() =1 And MouseClikc =0
                        MouseClikc =1
                        Inc SyncRate, 60
                        If SyncRate > 60 Then SyncRate = 0
                        Sync Rate SyncRate
                    EndIf
                    If MouseClick() <> 1 Then MouseClikc =0
    
    ` camera    rotate
                    oldx# = Camera Angle X() : oldy# = Camera Angle Y() : oldz# = Camera Angle Z()
                    Point Camera Object Position X(110), Object Position Y(110), Object Position Z(110)
                    newx# = Camera Angle X() : newy# = Camera Angle Y() : newz# = Camera Angle Z()
                    Rotate Camera oldx#, oldy#, oldz#
                    Rotate Camera CurveAngle( newx#, oldx#, 80.0 ), CurveAngle( newy#, oldy#, 80.0 ), 0.0
                    
                    
    
    ` info 2
        Set Cursor 0, 500
        Print "Sync Rate:   ", SyncRate
        Print "Time Step ", timerC#/1000

    ` Timer Based Physics
                    TimerB# = Timer() - TimerA#
                    If TimerB# <> TimerC#
                        TimerC# = TimerB#
                        TimerA# = Timer()
                    EndIf
                    elapsedTime# = Timer() - startTime#
    
                    PHY SET FIXED TIMING elapsedTime#
                    PHY SET TIMING timerC#/1000, 2, 0
                    
    ` Refresh
        Phy Update
        Sync
Loop

Can anyone confirm it works for you too?

Edit,
Works well with update method 2 as well

` DarkPhysics timer based movement tests.

` Test 2.
`   Manual timing

SyncRate = 60
Sync On
Sync Rate SyncRate

AutoCam Off
Color Backdrop RGB( 0, 128, 255 )
Ink RGB( 0, 64, 0 ), 0
Set Point Light 0, 0, 0, 0

If PhysX()=1 Then Phy Start 1,0,1 Else Phy Start
Phy Update 0
Phy Set Continuous CD 1
Phy Set Gravity 0, -20.0, 0
Phy Set Bounce Threshold -2.0

` floor
For x = 1 To 10 : For y = 1 To 10
    Inc o
    Make Object Box o, 10, 10, 10
    Position Object o, ((x*10)-50), -5+(rnd(5.0)), ((y*10)-50)
    Rotate Object o, rnd(90), rnd(90), rnd(90)
    Color Object o, RGB( 128, 255, 128 )
    Phy Make Rigid Body Static Box o
Next : Next

` Walls
For x = 101 To 105
    Make Object Box x, 100, 100, 5
    yRotate Object x, angle
    Phy Make Rigid Body Static Box x
    Hide Object x
    Inc angle, 90
Next x
Phy Set Rigid Body Position 101, 0, 50, 50
Phy Set Rigid Body Position 102, 50, 50, 0
Phy Set Rigid Body Position 103, 0, 50, -50
Phy Set Rigid Body Position 104, -50, 50, 0
Phy Set Rigid Body Position 105, 0, 100, 0 : Phy Set Rigid Body Rotation 105, 90, 0, 0

` falling object
Make Object Sphere 110, 10, 8, 8
Position Object 110, 0, 50, 0
Phy Make Rigid Body Dynamic Sphere 110

` camera
Position Camera -50, 50, -50
Point Camera 0, 0, 0

` Timer Based Physics Variables
        startTime# = Timer()        ` variable to determine how long the application has ran (in MS)
        timerA# = Timer()           ` variable to help calculate time step

Do
    ` info 1
        Set Cursor 0, 0
        Print "FPS:         ", Screen FPS()
    
    ` light     position
                    Inc LightCount
                    x# = (x# + Sin(LightCount)) : y# = 50 : z# = (z# + Cos(LightCount))
                    Position Light 0, x#, y#, z#
                    
    ` sphere    add force on spacekey
                    If SpaceKey() And SpakeCey=0
                        SpakeCey =1
                        Phy Add Rigid Body Force 110, 0, 100, 0, 2
                    EndIf
                    If Not SpaceKey() Then SpakeCey =0
    
    ` syncrate  change between 60 and 0
                    If MouseClick() =1 And MouseClikc =0
                        MouseClikc =1
                        Inc SyncRate, 60
                        If SyncRate > 60 Then SyncRate = 0
                        Sync Rate SyncRate
                    EndIf
                    If MouseClick() <> 1 Then MouseClikc =0
    
    ` camera    rotate
                    oldx# = Camera Angle X() : oldy# = Camera Angle Y() : oldz# = Camera Angle Z()
                    Point Camera Object Position X(110), Object Position Y(110), Object Position Z(110)
                    newx# = Camera Angle X() : newy# = Camera Angle Y() : newz# = Camera Angle Z()
                    Rotate Camera oldx#, oldy#, oldz#
                    Rotate Camera CurveAngle( newx#, oldx#, 80.0 ), CurveAngle( newy#, oldy#, 80.0 ), 0.0
                    
                    
    
    ` info 2
        Set Cursor 0, 500
        Print "Sync Rate:   ", SyncRate
        Print "Time Step ", timerC#/1000

` Timer Based Physics
                    TimerB# = Timer() - TimerA#
                    If TimerB# <> TimerC#
                        TimerC# = TimerB#
                        TimerA# = Timer()
                    EndIf
                    elapsedTime# = Timer() - startTime#
    
                    PHY SET FIXED TIMING elapsedTime#
                    PHY SET TIMING timerC#/1000, 2, 0
                    
    ` Refresh
        Phy Update 1
        Phy Update 0
        Sync
        Phy Update 1
Loop

+ Code Snippet

` DarkPhysics timer based movement tests.

` Test 2.
`   Manual timing

SyncRate = 60
Sync On
Sync Rate SyncRate

AutoCam Off
Color Backdrop RGB( 0, 128, 255 )
Ink RGB( 0, 64, 0 ), 0
Set Point Light 0, 0, 0, 0


If PhysX()=1 Then Phy Start 1,0,1 Else Phy Start
Phy Update 0
Phy Set Continuous CD 1
Phy Set Gravity 0, -20.0, 0
Phy Set Bounce Threshold -2.0


` floor
For x = 1 To 10 : For y = 1 To 10
    Inc o
    Make Object Box o, 10, 10, 10
    Position Object o, ((x*10)-50), -5+(rnd(5.0)), ((y*10)-50)
    Rotate Object o, rnd(90), rnd(90), rnd(90)
    Color Object o, RGB( 128, 255, 128 )
    Phy Make Rigid Body Static Box o
Next : Next

` Walls
For x = 101 To 105
    Make Object Box x, 100, 100, 5
    yRotate Object x, angle
    Phy Make Rigid Body Static Box x
    Hide Object x
    Inc angle, 90
Next x
Phy Set Rigid Body Position 101, 0, 50, 50
Phy Set Rigid Body Position 102, 50, 50, 0
Phy Set Rigid Body Position 103, 0, 50, -50
Phy Set Rigid Body Position 104, -50, 50, 0
Phy Set Rigid Body Position 105, 0, 100, 0 : Phy Set Rigid Body Rotation 105, 90, 0, 0


` falling object
Make Object Sphere 110, 10, 8, 8
Position Object 110, 0, 50, 0
Phy Make Rigid Body Dynamic Sphere 110


` camera
Position Camera -50, 50, -50
Point Camera 0, 0, 0



` Timer Based Physics Variables
        startTime# = Timer()        ` variable to determine how long the application has ran (in MS)
        timerA# = Timer()           ` variable to help calculate time step


Do
    ` info 1
        Set Cursor 0, 0
        Print "FPS:         ", Screen FPS()
    
    ` light     position
                    Inc LightCount
                    x# = (x# + Sin(LightCount)) : y# = 50 : z# = (z# + Cos(LightCount))
                    Position Light 0, x#, y#, z#
                    
    ` sphere    add force on spacekey
                    If SpaceKey() And SpakeCey=0
                        SpakeCey =1
                        Phy Add Rigid Body Force 110, 0, 100, 0, 2
                    EndIf
                    If Not SpaceKey() Then SpakeCey =0
    
    ` syncrate  change between 60 and 0
                    If MouseClick() =1 And MouseClikc =0
                        MouseClikc =1
                        Inc SyncRate, 60
                        If SyncRate > 60 Then SyncRate = 0
                        Sync Rate SyncRate
                    EndIf
                    If MouseClick() <> 1 Then MouseClikc =0
    
    ` camera    rotate
                    oldx# = Camera Angle X() : oldy# = Camera Angle Y() : oldz# = Camera Angle Z()
                    Point Camera Object Position X(110), Object Position Y(110), Object Position Z(110)
                    newx# = Camera Angle X() : newy# = Camera Angle Y() : newz# = Camera Angle Z()
                    Rotate Camera oldx#, oldy#, oldz#
                    Rotate Camera CurveAngle( newx#, oldx#, 80.0 ), CurveAngle( newy#, oldy#, 80.0 ), 0.0
                    
                    
    
    ` info 2
        Set Cursor 0, 500
        Print "Sync Rate:   ", SyncRate
        Print "Time Step ", timerC#/1000

    ` Timer Based Physics
                    TimerB# = Timer() - TimerA#
                    If TimerB# <> TimerC#
                        TimerC# = TimerB#
                        TimerA# = Timer()
                    EndIf
                    elapsedTime# = Timer() - startTime#
    
                    PHY SET FIXED TIMING elapsedTime#
                    PHY SET TIMING timerC#/1000, 2, 0
                    
    ` Refresh
        Phy Update 1
        Phy Update 0
        Sync
        Phy Update 1
Loop

I allways afraided from a clowns. aww..

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sindore

19

Years of Service

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Joined: 2nd Jul 2004

Location: Bedfordshire, UK

Posted: 20th Aug 2008 15:37

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ok it works, but i don`t see what you are trying to acheve.

are you trying to slow down time in this exarmp?

soul sucking devils, twisted body of the damed, slivering slim drips from every poor, sin licking at your ears, and the smell stinging your eyes, and if you don't like it, get out of my kitchen!

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Lukas W

20

Years of Service

User Offline

Joined: 5th Sep 2003

Location: Sweden

Posted: 20th Aug 2008 16:23

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When I am trying to achieve is equal performance (physics) independent on screen fps.

In my game engine I can climb ropes and swim around when the fps is over 60.
But when the fps is 60fps (vsync) or lower, the rope limbs are randomly being tossed about when climbing. And it is impossible to swim. You just sink to the bottom and is unable to move.

The engine is completely timer based, so I need the physics to be as well.
Using the command "PHY SET AUTO FIXED TIMING", which should perform eqally on all fps, which it unsurprisingly (taking into account all other faults I've had with DP) doesn't. But instead do what I described above.

I need to find a way to manually set the timing for the physcis so it is performing good on all fps's.

I implemented the usage method of this test into the game engine but it still didn't work. So now I am concerned I will have to perform a rewrite (4k lines) to make sure I didn't miss anything. Aww..

Unless someone has already figured out how to use the timer commands.

I allways afraided from a clowns. aww..

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Dark Physics & Dark A.I. & Dark Dynamix / [Dark Physics] How do I use the timer commands?