return force??

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return force?? #24930 04/02/04 04:03 04/02/04 04:03
Joined: Mar 2004 Posts: 70 M Matan_Golan_A6 OP Junior Member
Matan_Golan_A6 OP Junior Member M Joined: Mar 2004 Posts: 70	why when ball1 hit another ball2 ball2 move by the force but ball1 dont get return force (elastic) p.s i defined the elasticy force to 50... and still nothing should i use the old way like var min_dist_between_balls = 10; var dist_between_balls; dist_between_balls = ball1.x - ball2.x; if (dist_between_balls <= min_dist_between_bals) { phent_addcentralforce(ball1, lunchpower); } this will work??

Re: return force?? [Re: Matan_Golan_A6] #24931 04/02/04 04:21 04/02/04 04:21
Joined: Mar 2003 Posts: 5,377 USofA fastlane69 Senior Expert
fastlane69 Senior Expert Joined: Mar 2003 Posts: 5,377 USofA	Newton's Third works fine for me. Check that your Drag and Friction values aren't high. My guess is that ent1 has no D or f, while ent2 has alot of D and f. Check that ent2 is also registered with the PE. If you have anything but PRO, you are only allowed one registered entity. Either your physical parameters aren't set correctly or you don't have PRO. Other than that, I dan't see why it shouldn't work FUTUR-E-SCAPE: The Future Landscape of Education and Entertainment.

Re: return force?? [Re: fastlane69] #24932
04/03/04 03:19 04/03/04 03:19

Joined: Mar 2004
Posts: 70

Matan_Golan_A6 Offline

OP
Junior Member

Matan_Golan_A6 Offline

OP
Junior Member

Joined: Mar 2004
Posts: 70

OH i have Pro...
and ive reg my entities
all the balls have same drag and firction(and mass)

p.s but if the ball hit a wall or bound the N force is applied
maybe it will need a colison detection code for balls?

edit:
here is my code
(Key_u) is insted of the aiming and power code i just want to test it first.

Code:


entity* cueball;

entity* 1ball;

entity* 2ball;

entity* 3ball;	

entity* 4ball;

entity* 5ball;

entity* 6ball;	

entity* 7ball;

entity* 8ball;

entity* 9ball;	

entity* 10ball;

entity* 11ball;

entity* 12ball;

entity* 13ball;

entity* 14ball;

entity* 15ball;



bmap cueballb = <1cue.pcx>;

bmap 1ballb = <1.pcx>;

bmap 2ballb = <2.pcx>;

bmap 3ballb = <3.pcx>;

bmap 4ballb = <4.pcx>;

bmap 5ballb = <5.pcx>;

bmap 6ballb = <6.pcx>;

bmap 7ballb = <7.pcx>;

bmap 8ballb = <8.pcx>;

bmap 9ballb = <9.pcx>;

bmap 10ballb = <10.pcx>;

bmap 11ballb = <11.pcx>;

bmap 12ballb = <12.pcx>;

bmap 13ballb = <13.pcx>;

bmap 14ballb = <14.pcx>;

bmap 15ballb = <15.pcx>;	



material cueballm

{

	skin4 = cueballb;

}





function setup_balls()

{

//starting setup balls pos!

//cueball:

var cueballsetup[3] = -368, -32, -448;

var cueskin = 3;

cueball = ent_create (mdlb, cueballsetup, NULL);

	cueball.skin = cueskin;

	cueball.metal = ON;

   cueball.albedo = 70;

   cueball.ambient =20;

//cueball.material = cueballm;

//1st ball:

var 1ballsetup[3] = 192, -32, -448;

1ball = ent_create (mdlb, 1ballsetup, NULL);

1ball.metal = ON;

1ball.albedo = 70;

1ball.ambient =20;

//2nd ball:

var 2ballsetup[3] = 224, -48, -448;

2ball = ent_create (mdlb, 2ballsetup, NULL);

2ball.metal = on;

2ball.albedo = 70;

2ball.ambient = 20;

//3rd ball:

var 3ballsetup[3] = 224, -16 , -448;

3ball = ent_create (mdlb, 3ballsetup, NULL);

3ball.metal= on;

3ball.albedo = 70;

3ball.ambient = 20;

//4th ball:

var 4ballsetup[3] = 256, -64, -448;

4ball = ent_create (mdlb, 4ballsetup, NULL);

4ball.metal = on;

4ball.albedo = 70;

4ball.ambient = 20;

//5th ball:

var 5ballsetup[3] = 256, -32, -448;

5ball = ent_create (mdlb, 5ballsetup, NULL);

5ball.metal = on;

5ball.albedo = 70;

5ball.ambient = 20;

//6th ball:

var 6ballsetup[3] = 256, 0, -448;

6ball = ent_create (mdlb, 6ballsetup, NULL);

6ball.metal = on;

6ball.albedo = 70;

6ball.ambient= 20;

//7th ball:

var 7ballsetup[3] = 288, 16, -448;

7ball = ent_create (mdlb, 7ballsetup, NULL);

7ball.metal = on;

7ball.albedo = 70;

7ball.ambient= 20;

//8th ball:

var 8ballsetup[3] = 288,-48, -488;

8ball = ent_create (mdlb, 8ballsetup, NULL);

8ball.metal = on;

8ball.albedo = 70;

8ball.ambient= 20;

//9th ball:

var 9ballsetup[3] = 288, -16, -448;

9ball = ent_create (mdlb, 9ballsetup, NULL);

9ball.metal = on;

9ball.albedo = 70;

9ball.ambient= 20;

//10th ball:

var 10ballsetup[3] = 320, -66, -448;

10ball = ent_create (mdlb, 10ballsetup, NULL);

10ball.metal = on;

10ball.albedo = 70;

10ball.ambient= 20;

//11th ball:

var 11ballsetup[3] = 288, -80, -448;

11ball = ent_create (mdlb, 11ballsetup,NULL);

11ball.metal = on;

11ball.albedo = 70;

11ball.ambient= 20;

//12th ball:

var 12ballsetup[3] = 320, -32, -448;

12ball = ent_create (mdlb, 12ballsetup, NULL);

12ball.metal = on;

12ball.albedo = 70;

12ball.ambient= 20;

//13th ball:

var 13ballsetup[3] = 320, 0, -448;

13ball = ent_create (mdlb, 13ballsetup, NULL);

13ball.metal = on;

13ball.albedo = 70;

13ball.ambient= 20;

//14th ball:

var 14ballsetup[3] = 320, -64, -448;

14ball = ent_create (mdlb, 14ballsetup, NULL);

14ball.metal = on;

14ball.albedo = 70;

14ball.ambient= 20;

//15th ball:

var 15ballsetup[3] = 320, 32, -448;

15ball = ent_create (mdlb, 15ballsetup, NULL);

15ball.metal = on;

15ball.albedo = on;

15ball.ambient = on;

//Done setup ball pos!

}

}



function ball_ph()

{



	var grav[3] = 0, 0, -1500;

	ph_setgravity(grav);

	phent_settype (cueball,ph_rigid, ph_sphere);

	phent_settype (1ball,ph_rigid, ph_sphere);

	phent_settype (2ball,ph_rigid, ph_sphere);

	phent_settype (3ball,ph_rigid, ph_sphere);

	phent_settype (4ball,ph_rigid, ph_sphere);

	phent_settype (5ball,ph_rigid, ph_sphere);

	phent_settype (6ball,ph_rigid, ph_sphere);

	phent_settype (7ball,ph_rigid, ph_sphere);

	phent_settype (8ball,ph_rigid, ph_sphere);

	phent_settype (9ball,ph_rigid, ph_sphere);

	phent_settype (10ball,ph_rigid, ph_sphere);

	phent_settype (11ball,ph_rigid, ph_sphere);

	phent_settype (12ball,ph_rigid, ph_sphere);

	phent_settype (13ball,ph_rigid, ph_sphere);

	phent_settype (14ball,ph_rigid, ph_sphere);

	phent_settype (15ball,ph_rigid, ph_sphere);



	phent_setmass(cueball, 1.5, ph_sphere);

	phent_setmass(1ball, 1.5, ph_sphere);

	phent_setmass(2ball, 1.5, ph_sphere);

	phent_setmass(3ball, 1.5, ph_sphere);

	phent_setmass(4ball, 1.5, ph_sphere);

	phent_setmass(5ball, 1.5, ph_sphere);

	phent_setmass(6ball, 1.5, ph_sphere);

	phent_setmass(7ball, 1.5, ph_sphere);

	phent_setmass(8ball, 2, ph_sphere);

	phent_setmass(9ball, 1.5, ph_sphere);

	phent_setmass(10ball, 1.5, ph_sphere);

	phent_setmass(11ball, 1.5, ph_sphere);

	phent_setmass(12ball, 1.5, ph_sphere);

	phent_setmass(13ball, 1.5, ph_sphere);

	phent_setmass(14ball, 1.5, ph_sphere);

	phent_setmass(15ball, 1.5, ph_sphere);

	

	phent_setdamping(cueball, 20, 20);

	phent_setdamping(1ball, 20, 20);

	phent_setdamping(2ball, 20, 20);

	phent_setdamping(3ball, 20, 20);

	phent_setdamping(4ball, 20, 20);

	phent_setdamping(5ball, 20, 20);

	phent_setdamping(6ball, 20, 20);

	phent_setdamping(7ball, 20, 20);

	phent_setdamping(8ball, 20, 20);

	phent_setdamping(9ball, 20, 20);

	phent_setdamping(10ball, 20, 20);

	phent_setdamping(11ball, 20, 20);

	phent_setdamping(12ball, 20, 20);

	phent_setdamping(13ball, 20, 20);

	phent_setdamping(14ball, 20, 20);

	phent_setdamping(15ball, 20, 20);

	

   phent_setfriction(cueball, 20);

   phent_setfriction(1ball , 20);

   phent_setfriction(2ball , 20);

   phent_setfriction(3ball , 20);

   phent_setfriction(4ball , 20);

   phent_setfriction(5ball , 20);

   phent_setfriction(6ball , 20);

   phent_setfriction(7ball , 20);

   phent_setfriction(8ball , 20);

   phent_setfriction(9ball , 20);

   phent_setfriction(10ball , 20);

   phent_setfriction(11ball , 20);

   phent_setfriction(12ball , 20);

   phent_setfriction(13ball , 20);

   phent_setfriction(14ball , 20);

   phent_setfriction(15ball , 20);

   

   phent_setelasticity (cueball, 50, 2);

   phent_setelasticity (1ball, 50 ,2);

   phent_setelasticity (2ball, 50 ,2);

   phent_setelasticity (3ball, 50 ,2);

   phent_setelasticity (4ball, 50 ,2);

   phent_setelasticity (5ball, 50 ,2);

   phent_setelasticity (6ball, 50 ,2);

   phent_setelasticity (7ball, 50 ,2);

   phent_setelasticity (8ball, 50 ,2);

   phent_setelasticity (9ball, 50 ,2);

   phent_setelasticity (10ball, 50 ,2);

   phent_setelasticity (11ball, 50 ,2);

   phent_setelasticity (12ball, 50 ,2);

   phent_setelasticity (13ball, 50 ,2);

   phent_setelasticity (14ball, 50 ,2);

   phent_setelasticity (15ball, 50 ,2);



		while(1)

	{

		if (key_u)

		{

			var boom[3] = 8000,0,0;

			phent_addcentralforce(cueball,boom);

		

		}



		wait(1);

	}

}

Last edited by Matan_Golan_A6; 04/03/04 03:22.

Re: return force?? [Re: Matan_Golan_A6] #24933 04/09/04 10:30 04/09/04 10:30
Joined: Sep 2003 Posts: 3,236 San Diego, CA M Marco_Grubert Expert
Marco_Grubert Expert M Joined: Sep 2003 Posts: 3,236 San Diego, CA	Quote: why when ball1 hit another ball2 ball2 move by the force but ball1 dont get return force (elastic) Elasticity is calculated as the product of both objects' elasticity value. Level walls are set to 1.0 (perfectly elastic). If you have two 0.5 balls colliding then the total elasticity will be only 0.25. Instead set one of them to 100 %.

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