Re: Flame Painter Dev Thread
Posted: Thu Jan 06, 2011 5:24 pm
dude thats fucking awesome 
If anyone is interested I'll chuck the source out there.
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Flame Painter Dev Thread
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Re: Flame Painter Dev Thread
Posted: Fri Jan 07, 2011 8:55 am
My attempt, i have a few parameters like noise, focus, force, and size, kinda tried to just emulate the applet thing.
If anyone is interested I'll chuck the source out there.
If anyone is interested I'll chuck the source out there.
Re: Flame Painter Dev Thread
Posted: Fri Jan 07, 2011 10:59 am
Nice, and please doavansc wrote:My attempt, i have a few parameters like noise, focus, force, and size, kinda tried to just emulate the applet thing.
If anyone is interested I'll chuck the source out there.
Re: Flame Painter Dev Thread
Posted: Fri Jan 07, 2011 11:16 am
Since I sorta want to do this on my own... no D:avansc wrote:My attempt, i have a few parameters like noise, focus, force, and size, kinda tried to just emulate the applet thing.
If anyone is interested I'll chuck the source out there.
Just shows my shitty physics skills since you got way better results in one build :P
Re: Flame Painter Dev Thread
Posted: Fri Jan 07, 2011 2:13 pm
I'll just put the zip up.xiphirx wrote:
Since I sorta want to do this on my own... no D:
Just shows my shitty physics skills since you got way better results in one build :P
I use almost no physics on this one, this is literally the only physics, and that just describes the motion of a independent particle.
Code: Select all
void Painter::update(const float dt)
{
this->vel.x += this->accel.x * dt;
this->vel.y += this->accel.y * dt;
this->pos.x += this->vel.x*dt + (this->accel.x*dt*dt)/2;
this->pos.y += this->vel.y*dt + (this->accel.y*dt*dt)/2;
this->accel.x = 0;
this->accel.y = 0;
this->vel.x *= 0.999;
this->vel.y *= 0.999;
}
Re: Flame Painter Dev Thread
Posted: Fri Jan 07, 2011 3:45 pm
Thanks for that.
I'm currently trying to fix my delta timing stuff... timestep is messing up when you fullscreen it :/
I'm currently trying to fix my delta timing stuff... timestep is messing up when you fullscreen it :/
Re: Flame Painter Dev Thread
Posted: Fri Jan 07, 2011 5:20 pm
Out of curiosity, where in the world did you come up with that code, avansc?
Re: Flame Painter Dev Thread
Posted: Fri Jan 07, 2011 5:59 pm
These are all just kinematic motion equations.dandymcgee wrote:Out of curiosity, where in the world did you come up with that code, avansc?
okay lets take a look
the first bit is the velocity equation, accel here really is just a force acting on the particle.
this->vel.x += this->accel.x * dt;
this->vel.y += this->accel.y * dt;
Velocity_final = Velocity_initial + acceleration * delta_time // acceleration pertime gives velocity
now that we have out current velocity we can use the displacement equation. i just used this one, but there are many, V = D/T and so on.
this->pos.x += this->vel.x*dt + (this->accel.x*dt*dt)/2;
this->pos.y += this->vel.y*dt + (this->accel.y*dt*dt)/2;
I reset the "force"
this->accel.x = 0;
this->accel.y = 0;
This part just dampens there velocity, a kind of friction if you will.
this->vel.x *= 0.999;
this->vel.y *= 0.999;
}
http://en.wikipedia.org/wiki/Kinematics
Re: Flame Painter Dev Thread
Posted: Fri Jan 07, 2011 8:46 pm
Hmm... So I tried to put what you had in your update function avansc, but I get pretty bad results... How do you calculate the acceleration?
Re: Flame Painter Dev Thread
Posted: Sat Jan 08, 2011 3:26 pm
being bored.
http://img443.imageshack.us/img443/1778 ... 8at422.png
something like that.
http://img443.imageshack.us/img443/1778 ... 8at422.png
something like that.
Code: Select all
for(int a = 0;a < MAX;a++)
{
cVec2 t = cVec2(tx,ty);
t -= it[a]->pos;
//t.normalize();
/*
FORCE = general attraction force : 0.3f
FOCUS = total spread : 1.0f
SPRING = force that keeps ajacent particles together : 10.0f
*/
float f = ((a+1)/(float)MAX)/FORCE*(FOCUS - ((a+1)/((float)MAX+SPRING)));
t*=f;
//apply accel
it[a]->accel.setX(t.getX());
it[a]->accel.setY(t.getY());
//some noise
it[a]->vel.x += (NOISE*(rand()%1000/999.0f-0.5f));
it[a]->vel.y += (NOISE*(rand()%1000/999.0f-0.5f));
}Re: Question about Math and Algorithm
Posted: Sat Jan 08, 2011 3:45 pm
That's exactly what I did, and its a bad ass one :Ddandymcgee wrote:That would make an awesome screensaver.
Re: Question about Math and Algorithm
Posted: Sun Jan 09, 2011 11:17 am
This looks awesome!
Agreed!dandymcgee wrote:That would make an awesome screensaver.
Re: Flame Painter Dev Thread
Posted: Mon Jan 10, 2011 1:45 am
This thread is win. Avansc is a bamf!
Re: Flame Painter Dev Thread
Posted: Mon Jan 10, 2011 7:39 am
Did you ever put this up, i'd definitely like to have a look at the sourceavansc wrote: I'll just put the zip up.
Re: Flame Painter Dev Thread
Posted: Mon Jan 10, 2011 8:07 am
I'll get on that, It's just very very messy atm. but i'll chuck something out there.MrDeathNote wrote:Did you ever put this up, i'd definitely like to have a look at the sourceavansc wrote: I'll just put the zip up.