Newton Physics: can't create floor

Author

Message

Uber Ker Noober

19

Years of Service

User Offline

Joined: 13th Jan 2007

Location: Sheffield, UK

Posted: 25th May 2010 17:23

Link

So I've been messing around with Newton physics and I can make small examples of an object moving along a floor but when I apply it to my game the player object just falls through the floor;

This is a simplified code of the problem;

autocam off : set camera range 1,6000 : `hide mouse

NDB_Newtoncreate
    NDB_SetVector 0.0, -9.8, 0.0 : NDB_SetStandardGravity

Make Object box 1,2560,2560,2560
    map_floor = 1 : position object map_floor,1280,-1280,1280
    color object map_floor,rgb(0, 128, 64)
    
   col = NDB_NewtonCreateBox( 2560.0, 2560.0, 2560.0 )
   ground = NDB_NewtonCreateBody( col )
   NDB_BuildMatrix 0.0, 0.0, 0.0, 1280.0, -1280.0, 1280.0
   NDB_NewtonBodySetMAtrix ground
   NDB_BodySetDBProData ground, map_floor

make object box 2,80,109,64
player_box = 2

position object player_box,256,(109/2)+100,256
`set shadow shading on player
`physics
col=NDB_NewtonCreatebox(80,109,64)
phy_player = NDB_NewtonCreateBody(col)
NDB_BodySetDBProData phy_player,player_box
NDB_NewtonBodySetMassMatrix phy_player, 100
NDB_BodySetGravity phy_player,1
NDB_NewtonBodySetAutoFreeze phy_player,0
NDB_BuildMatrix 0.0, 0.0, 0.0, 256,(109/2)+100,256
NDB_NewtonBodySetMatrix phy_player
NDB_NewtonReleaseCollision col
NDB_SetVector 0,1,0
UpvectorJoint = NDB_NewtonConstraintCreateUpVector( phy_player )
Force#=20

time# = NDB_GetElapsedTimeInSec()
time# = NDB_GetElapsedTimeInSec()

sync on : sync rate 60
do
    time# = NDB_GetElapsedTimeInSec()
    NDB_NewtonUpdate time#
    
    position camera Object Position x (NDB_GetDBPro(phy_player)),Object Position y (NDB_GetDBPro(phy_player))+50,Object Position z (NDB_GetDBPro(phy_player))
    rotate camera object angle x (NDB_GetDBPro(phy_player)),object angle y (NDB_GetDBPro(phy_player)),object angle z (NDB_GetDBPro(phy_player))
    move camera -200
    
    NDB_SetVector 1,0,0,0.3
    NDB_SetVector 2,0,0,0
    if upkey() then NDB_SetVector 2,0,0,force#
    if downkey() then NDB_SetVector 2,0,0,-force#
    if leftkey() then NDB_SetVector 2,-force#,0,0
    if rightkey() then NDB_SetVector 2,force#,0,0
    if spacekey() then NDB_SetVector 2,0,force#,0
    NDB_BodyAddForceLocal phy_player
    
    if controlkey() then NDB_DebugDrawNewtonLines

sync
loop

+ Code Snippet

autocam off : set camera range 1,6000 : `hide mouse

    NDB_Newtoncreate
    NDB_SetVector 0.0, -9.8, 0.0 : NDB_SetStandardGravity

    Make Object box 1,2560,2560,2560
    map_floor = 1 : position object map_floor,1280,-1280,1280
    color object map_floor,rgb(0, 128, 64)
    
   col = NDB_NewtonCreateBox( 2560.0, 2560.0, 2560.0 )
   ground = NDB_NewtonCreateBody( col )
   NDB_BuildMatrix 0.0, 0.0, 0.0, 1280.0, -1280.0, 1280.0
   NDB_NewtonBodySetMAtrix ground
   NDB_BodySetDBProData ground, map_floor

make object box 2,80,109,64
player_box = 2

position object player_box,256,(109/2)+100,256
`set shadow shading on player
`physics
col=NDB_NewtonCreatebox(80,109,64)
phy_player = NDB_NewtonCreateBody(col)
NDB_BodySetDBProData phy_player,player_box
NDB_NewtonBodySetMassMatrix phy_player, 100
NDB_BodySetGravity phy_player,1
NDB_NewtonBodySetAutoFreeze phy_player,0
NDB_BuildMatrix 0.0, 0.0, 0.0, 256,(109/2)+100,256
NDB_NewtonBodySetMatrix phy_player
NDB_NewtonReleaseCollision col
NDB_SetVector 0,1,0
UpvectorJoint = NDB_NewtonConstraintCreateUpVector( phy_player )
Force#=20


time# = NDB_GetElapsedTimeInSec()
time# = NDB_GetElapsedTimeInSec()

sync on : sync rate 60
do
    time# = NDB_GetElapsedTimeInSec()
    NDB_NewtonUpdate time#
    
    position camera Object Position x (NDB_GetDBPro(phy_player)),Object Position y (NDB_GetDBPro(phy_player))+50,Object Position z (NDB_GetDBPro(phy_player))
    rotate camera object angle x (NDB_GetDBPro(phy_player)),object angle y (NDB_GetDBPro(phy_player)),object angle z (NDB_GetDBPro(phy_player))
    move camera -200
    
    NDB_SetVector 1,0,0,0.3
    NDB_SetVector 2,0,0,0
    if upkey() then NDB_SetVector 2,0,0,force#
    if downkey() then NDB_SetVector 2,0,0,-force#
    if leftkey() then NDB_SetVector 2,-force#,0,0
    if rightkey() then NDB_SetVector 2,force#,0,0
    if spacekey() then NDB_SetVector 2,0,force#,0
    NDB_BodyAddForceLocal phy_player
    
    if controlkey() then NDB_DebugDrawNewtonLines

sync
loop

Thanks in advance

Back to top

Profile PM Email Website

tiresius

23

Years of Service

User Offline

Joined: 13th Nov 2002

Location: MA USA

Posted: 26th May 2010 01:48

Link

Try setting the world size like the demos do.

A 3D marble platformer using Newton physics.

Back to top

Profile PM Email

Uber Ker Noober

19

Years of Service

User Offline

Joined: 13th Jan 2007

Location: Sheffield, UK

Posted: 26th May 2010 02:13

Link

Brilliant, did the trick! Thank you so much!
although now the box rotates extemely quickly. is ther a particular reason for this?

Back to top

Profile PM Email Website

Uber Ker Noober

19

Years of Service

User Offline

Joined: 13th Jan 2007

Location: Sheffield, UK

Posted: 26th May 2010 14:36

Link

Yeah I can't figure out how to control the player properly? I've compared against the examples and can't see what could be wrong:

autocam off : set camera range 1,6000 : `hide mouse
global physics_engine : physics_engine = 1
gosub _physics_setup_env

Make Object box 1,2560,2560,2560
    map_floor = 1 : position object map_floor,1280,-1280,1280
    color object map_floor,rgb(0, 128, 64)
    phy_floor = physics_create_floor(map_floor)
  
    make object box 2,80,109,64
    position object 2,250,250,250
    player = 2
    phy_player = physics_create_char(player)

sync on : sync rate 60
do
//VAR
    px# = object position x(player)
    py# = object position y(player)
    pz# = object position z(player) 
//CAM
    position camera px#,py#+100,pz#
    SET CAMERA TO OBJECT ORIENTATION player
    move camera -250
  
    gosub _physic_loop
sync
loop

_physics_setup_env:
if physics_engine = 1
    NDB_Newtoncreate
    NDB_SetVector 0.0, -9.8, 0.0 : NDB_SetStandardGravity
    NDB_SetVector 1,-1280,-1,-1280 : NDB_SetVector 2,2560,2560,2560 : NDB_NewtonSetWorldSize
    move_force#=100
endif    
return

function physics_create_char(player)
    px# = object position x(player)
    py# = object position y(player)
    pz# = object position z(player) 
if physics_engine = 1
    col=NDB_NewtonCreatebox(object size x(player),object size y(player),object size z(player))
    phy_player = NDB_NewtonCreateBody(col)
    NDB_BodySetDBProData phy_player,player
    NDB_NewtonBodySetMassMatrix phy_player, 100
    NDB_BodySetGravity phy_player,1
    NDB_NewtonBodySetAutoFreeze phy_player,0
    //TODO object angle
    NDB_BuildMatrix 0.0, 0.0, 0.0, px#,py#,pz#
    NDB_NewtonBodySetMatrix phy_player
    NDB_NewtonReleaseCollision col
    NDB_SetVector 0,1,0
    UpvectorJoint = NDB_NewtonConstraintCreateUpVector( phy_player )
    
    //TODO material
endif
endfunction phy_player

function physics_create_floor(floorobj)
if physics_engine = 1
   col = NDB_NewtonCreateBox( object size x(floorobj),object size y(floorobj),object size z(floorobj) )
   phy_floor = NDB_NewtonCreateBody( col )
   NDB_BuildMatrix 0.0, 0.0, 0.0, 1280.0, -1280.0, 1280.0
   NDB_NewtonBodySetMAtrix phy_floor
   NDB_BodySetDBProData phy_floor, floorobj
endif
endfunction phy_floor

function physics_create_box()
if physics_engine = 1

endif
endfunction

_physic_loop:
if physics_engine = 1

Rem Here we set the forces on the fps object (Movement)
    Rem The first vector 1 is in this case (NDB_BodyAddForceLocal) saying
    Rem WHERE on the fps object the force will be set.
    Rem I have made a slight offset in the direction of the front of the object
    Rem Which I will use to make the object turn. (I am making sure that
    Rem the forces will be pushing it on the 'nose')
    Rem (0.3 units in the Z direction, object front direction)
    NDB_SetVector 1,0,0,0.0.3
    NDB_SetVector 2,0,0,0
    if upkey() then NDB_SetVector 2,0,0,move_force#
    if downkey() then NDB_SetVector 2,0,0,-move_force#
    if leftkey() then NDB_SetVector 2,-move_force#,0,0
    if rightkey() then NDB_SetVector 2,move_force#,0,0
    if spacekey() then NDB_SetVector 2,0,move_force#,0
    NDB_BodyAddForceLocal phy_player
    
    if controlkey() then NDB_DebugDrawNewtonLines
    
    time# = NDB_GetElapsedTimeInSec()
    NDB_NewtonUpdate time#
endif
return

+ Code Snippet

autocam off : set camera range 1,6000 : `hide mouse
global physics_engine : physics_engine = 1
gosub _physics_setup_env

    Make Object box 1,2560,2560,2560
    map_floor = 1 : position object map_floor,1280,-1280,1280
    color object map_floor,rgb(0, 128, 64)
    phy_floor = physics_create_floor(map_floor)
  
    make object box 2,80,109,64
    position object 2,250,250,250
    player = 2
    phy_player = physics_create_char(player)


sync on : sync rate 60
do
//VAR
    px# = object position x(player)
    py# = object position y(player)
    pz# = object position z(player) 
//CAM
    position camera px#,py#+100,pz#
    SET CAMERA TO OBJECT ORIENTATION player
    move camera -250
  
    gosub _physic_loop
sync
loop



_physics_setup_env:
if physics_engine = 1
    NDB_Newtoncreate
    NDB_SetVector 0.0, -9.8, 0.0 : NDB_SetStandardGravity
    NDB_SetVector 1,-1280,-1,-1280 : NDB_SetVector 2,2560,2560,2560 : NDB_NewtonSetWorldSize
    move_force#=100
endif    
return

function physics_create_char(player)
    px# = object position x(player)
    py# = object position y(player)
    pz# = object position z(player) 
if physics_engine = 1
    col=NDB_NewtonCreatebox(object size x(player),object size y(player),object size z(player))
    phy_player = NDB_NewtonCreateBody(col)
    NDB_BodySetDBProData phy_player,player
    NDB_NewtonBodySetMassMatrix phy_player, 100
    NDB_BodySetGravity phy_player,1
    NDB_NewtonBodySetAutoFreeze phy_player,0
    //TODO object angle
    NDB_BuildMatrix 0.0, 0.0, 0.0, px#,py#,pz#
    NDB_NewtonBodySetMatrix phy_player
    NDB_NewtonReleaseCollision col
    NDB_SetVector 0,1,0
    UpvectorJoint = NDB_NewtonConstraintCreateUpVector( phy_player )
    
    //TODO material
endif
endfunction phy_player

function physics_create_floor(floorobj)
if physics_engine = 1
   col = NDB_NewtonCreateBox( object size x(floorobj),object size y(floorobj),object size z(floorobj) )
   phy_floor = NDB_NewtonCreateBody( col )
   NDB_BuildMatrix 0.0, 0.0, 0.0, 1280.0, -1280.0, 1280.0
   NDB_NewtonBodySetMAtrix phy_floor
   NDB_BodySetDBProData phy_floor, floorobj
endif
endfunction phy_floor

function physics_create_box()
if physics_engine = 1

endif
endfunction

_physic_loop:
if physics_engine = 1

    Rem Here we set the forces on the fps object (Movement)
    Rem The first vector 1 is in this case (NDB_BodyAddForceLocal) saying
    Rem WHERE on the fps object the force will be set.
    Rem I have made a slight offset in the direction of the front of the object
    Rem Which I will use to make the object turn. (I am making sure that
    Rem the forces will be pushing it on the 'nose')
    Rem (0.3 units in the Z direction, object front direction)
    NDB_SetVector 1,0,0,0.0.3
    NDB_SetVector 2,0,0,0
    if upkey() then NDB_SetVector 2,0,0,move_force#
    if downkey() then NDB_SetVector 2,0,0,-move_force#
    if leftkey() then NDB_SetVector 2,-move_force#,0,0
    if rightkey() then NDB_SetVector 2,move_force#,0,0
    if spacekey() then NDB_SetVector 2,0,move_force#,0
    NDB_BodyAddForceLocal phy_player
    
    if controlkey() then NDB_DebugDrawNewtonLines
    
    time# = NDB_GetElapsedTimeInSec()
    NDB_NewtonUpdate time#
endif
return

Back to top

Profile PM Email Website

tiresius

23

Years of Service

User Offline

Joined: 13th Nov 2002

Location: MA USA

Posted: 26th May 2010 18:26

Link

move_force#=100

That is a lot of force. Check the FPS Demo and Jetpack demo to see ways to make characters move. My game is a marble game so I don't have many issues with movement. Just roll it.

A 3D marble platformer using Newton physics.

Back to top

Profile PM Email

Sorry your browser is not supported!

DarkBASIC Professional Discussion / Newton Physics: can't create floor