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[1.16.5] Change projectile position in first person


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I'm writing a mod for weapons and I ran into the problem of projectile position when shooting. How can I spawn a projectile so that when viewed from the first person, it flies out of the weapon, and not from the center of the screen?

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The easiest solution is to change the position of the bullet before it is spawned. It will however slightly mess with your aim, so take that into consideration.

An example code written in 1.15.2 (in 1.16.5 it is propably something similar):

float rot = playerEntity.rotationYaw/180.f*3.14159f; //Converts the player rotation to radians
float z = MathHelper.sin(rot) * 0.3f;	//the multiplier (0.3f) defines how much is the bullet moved to the right
float x = MathHelper.cos(rot) * 0.3f;	//this and the former equation localizes the bullet to the rotation of the player
//the subtrahend 0.5f controlls the height of the bullet
//changing the minus sign before x and z to plus moves the bullet to the left
anEntity.setPosition(playerEntity.getPosX() - x, playerEntity.getPosYEye() - (double)0.5f, playerEntity.getPosZ() - z);
//add the bullet to the world after this

 

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Just now, Thorius said:

That shouldn't happen because of the sinus and cosinus, at least it didn't happen in my tests.

Your code works well, I should have used the yaw player instead of taking yaw from my projectile. Thank you again

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