How to move particle to back from Player(as much as 0.5)

I made Particle with trigonometic functions, but I don't know how to move it back from player. How can I move it as much as 0.5 back?

 

The angle can be replaced with Player->getDirection(). And smaller radius you get if you divide both functions by the number...

For example:

Code:

x = 1/2 * cos(angle)
z = 1/2 * sin(angle)

If the particle is displayed at player's front then just add PI to the angle to move it to player's back...

 

I don't think that helped me. here is some code, can you edit it for what I wonder?

for ($i = 0; $i <= 1; $i=$i+0.2) {
$yaw = $p->yaw;
$right = $yaw + 180;
$x = cos($right * M_PI / 180) * $i + $p->x;
$z = sin($right * M_PI / 180) * $i + $p->z;
$p->getLevel()->addParticle(new FlameParticle(new Vector3($x, $p->y+1, $z)));
}

I want to make it move back as much as -0.5 On the basis of Player.

 

I'm sorry, I didn't write it right. Use Player->getYaw() insteadof Player->getDirection();

 

Btw you want to add more particles, or just one?

 

Sorry I see it late, I meen like wings? when I make particle, it just created in player's body(?) so I want to move particle to player's back.

I tried many time but it doesn't create that I wanted

 

So there is code I'm using... If you don't understand it, just use some plugin for that, I don't think it's good to use that without understanding the problematics.

Here is base of the code...

Code:

x = cos yaw + dist * sin yaw
z = sin yaw - dist * cos yaw

Then you can create more expanded code from that:

PHP:

   /**
     * @param $radius
     * @param $angle (Angle in degrees -> player's yaw)
     * @param int $size (Count of generated particles)
     * @param int $stacking (Particles / 1 block)
     *
     * @return \Generator [$x, $z]
     */
    public function generateTangentForCircle($radius, $angle, int $size = 1, $stacking = 10): \Generator {
        $angle = deg2rad($angle) - M_PI_2; // pi/2

        $particlesCount = (int) ceil(abs($stacking) / 2);

        for($i = -$particlesCount; $i <= $particlesCount; $i++) {
            $x = ($radius * cos($angle)) + ($i / $particlesCount * $size * sin($angle));
            $z = ($radius * sin($angle)) - ($i / $particlesCount * $size * cos($angle));

            yield [$x, $z];
        }
    }

 

This code is just for generating line at player's back. Next particles you will have to generate with changing Y axis