[ Dark Dynamix ] - Shoot Bulet - GameCreators Forum

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Arbrakan

14

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Joined: 10th Oct 2010

Location: Geneva

Posted: 5th Jan 2013 16:11

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Hi guys, I don't understand how to shoot a bullet correctly with Dark Dynamix for a FPS. I am lost with sin, and cos.

I have played with the demo Cloth from Dark Dynamix,and read (http://forum.thegamecreators.com/?m=forum_view&t=197384&b=30) where is a shotting system. But Can't shoot in every angle, front the camera.

+ Code Snippet

    power# = 60000
    DYN SET POSITION bullet, camera position X(camera0), camera position Y(camera0), camera position Z(camera0)
    camAngleX# = camera angle x(camera0)
    camAngleY# = camera angle y(camera0)
    camAngleZ# = camera angle z(camera0)
    xForce#    = power# * sin(camAngleY#) * cos(camAngleX#) 
    yForce#    = -power# * sin(camAngleX#)
    zForce#    = power# * cos(camAngle#) * cos(camAngleX#)
    DYN SET ROTATION bullet, camAngleX#, camAngleY#,camAngleZ#
    DYN ADD LOCAL FORCE bullet, xForce#, yForce#, zForce#

Thanks for the halp !

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MrValentine

AGK Backer

13

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Joined: 5th Dec 2010

Playing: FFVII

Posted: 5th Jan 2013 19:10

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Sorry not able to contribute here, but just tagging in before I run out, hopefully someone will have an answer before I get back...

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Matty H

16

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Joined: 7th Oct 2008

Location: England

Posted: 5th Jan 2013 23:41

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Try matching the bullet rotation and position to that of the gun/player and then apply a local force along the positive z axis, I think that should work but have not tested.

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Arbrakan

14

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Joined: 10th Oct 2010

Location: Geneva

Posted: 6th Jan 2013 02:28

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Thanks for the replies guys !
Ok with your help,now it work,Thanks Matty H !

+ Code Snippet

function fire()
    local PuniCharge = 0
    while mouseclick()>0
    power# = 800*PuniCharge
    DYN SET POSITION bulet, camera position X(camera0),camera position Y(camera0),camera position Z(camera0)
    camAngleX# = camera angle x(camera0)
    camAngleY# = camera angle y(camera0)
    camAngleZ# = camera angle z(camera0)
    zForce#    = power# * cos(camAngle#) * cos(camAngleX#)
    DYN SET ROTATION bulet, camAngleX#, camAngleY#,camAngleZ#
    DYN ADD LOCAL FORCE bulet, 0, 0, zForce#
    loadFire(PuniCharge)
    if PuniCharge < 101 then PuniCharge = PuniCharge+1
    sync
    endwhile
    PuniCharge = 0
    play sound 1
    //play sprite pulse_gun_S,0,9,pulse_gun_S
endfunction

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Matty H

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Joined: 7th Oct 2008

Location: England

Posted: 6th Jan 2013 12:09

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Glad that worked, I don't know why I didn't do it like that in the cloth example

You should no longer need to calculate the zForce based on any angles, a set power will always be the same no matter which way the bullet is facing since you are applying the force locally.

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Dark Physics & Dark A.I. & Dark Dynamix / [ Dark Dynamix ] - Shoot Bulet