Using ODE physics? [Darkplaces]

[Mexicouger]

I am just experimenting with ODE and trying to get the physics to actually work, but I can't seem to get a start on it. I set the cvar "ode_physics" to 1, and I wrote this code in the impulse commands.

Code: Select all

	case 13:
		//Utilize a traceline
		makevectors (self.v_angle);
		vector source;
		source = self.origin + '0 0 16' + v_forward * 10;
		traceline (source, source + v_forward*150, FALSE, self);

		local entity box;
		box = spawn();
		box.solid = SOLID_PHYSICS_BOX;
		box.movetype = MOVETYPE_PHYSICS;
		box.classname = "Physics";
		setorigin(box, trace_endpos);
		setmodel(box, "maps/models/test1.bsp");
	
		//Physic stuff
		physics_enable(box, TRUE);
		box.geomtype = GEOMTYPE_SOLID;
		box.mass = 50;
		box.massofs = box.origin;
		box.forcetype = FORCETYPE_FORCE;
		box.bouncefactor = 4;
	break;

I was just plugging things in, trying to get something to happen with my test1.bsp(a box). However, the box just spawns in mid-air and doesn't move. What code to I have to use to get the object to work?

[toneddu2000]

I had a hard time getting ODE to work just 1 week ago so I think I can be of help here.
Ok, first of all compile yourself or find a dll for your windows/linux version of ode with double precision (I don't know why. It has to be double) and for Windows I had to rename it libode1.dll and put it in the main folder (together with the other .dlls).
Don't ask me why. If i leave it ode_double.dll (original name found in lib/ ode source folder) game doesn't use physics.
Here's mine.

Simple qc code to use a ball:

Code: Select all

void() AnimateItem=
{
   physics_enable(self, 1); 
};


void() physobject_ball {
	setmodel(self, "models/phys/ball.iqm");
  
	self.velocity = '0 0 0';

	self.movetype = MOVETYPE_PHYSICS;
	self.solid  = SOLID_PHYSICS_SPHERE;   
	self.mass = 0.25;
	self.bouncefactor = .4;
   
	self.think = AnimateItem;
	self.nextthink = time + 0.2;
};

create an object in radiant with classname physobject_ball and you should be ok

let me know if it worked

PS: I noticed that writing something like this:

Code: Select all

self.origin_z = self.origin_z + 6;

make the object stand still in the mid air

PPS: your youtube's qc tutorials are GREAT. I learned a lot! Next?

EDIT: to play a little, go to your PutClientInServer function and comment

Code: Select all

//self.solid = SOLID_SLIDEBOX;         
//self.movetype = MOVETYPE_WALK; 

and add this

Code: Select all

//PLAYER ODE PHYSICS
	self.geomtype  = GEOMTYPE_CAPSULE;         
	self.movetype = MOVETYPE_PHYSICS;
	self.bouncefactor = 0;
	self.mass = 40;

now in PlayerPreThink function (client.qc file) add this:

Code: Select all

 physics_enable(self, 1); 

Player walks as slow as an old turtle, when he stops he continues walking a little, when he felt from up he bounce like a rubber ball... but he can now play soccer!

[Mexicouger]

Hey thanks! I think all I needed was the .dll file. I wasn't aware that It was necessary. And no problem! Glad someone appreciated those videos(Though an incomplete series).