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[Forge 1.12.2] Dot product between vectors keep decreasing when the player's vector is near the entity's vetor


lethinh

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I'm currently working on a block that its tile entity can automatically hit the mob. My problem is when I use the Vec3d dot product check if the entity is in the block tile entity hitbox, I realized that the block tile entity won't hit if the mob goes nearer the block. Here is my code:

 

Spoiler

Vec3d targetVec = target.getPositionVector();
Vec3d playerVec = player.getPositionVector();
Vec3d dir1 = targetVec.subtract(playerVec).normalize();
Vec3d dir2 = player.getLookVec().normalize();
double dot = dir1.dotProduct(dir2);

boolean isInHitbox = dot >= 0.8D; // If it is smaller then the mob is behind the block or not in the hitbox

 

I would greatly appreciated your help! Thanks in advance.

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10 hours ago, lethinh said:

I use the Vec3d dot product check if the entity is in the block tile entity hitbox

Dot product is not the correct tool here. You want it within range, use a distance check.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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