https://gist.github.com/lntricate1/e7a2c3f0e10eaa40ac932cab74619ea7
Xcom's 3-part explanation series, explains most of the basics of pearls, tnt, and chunkloading needed for cannons:
1- https://www.youtube.com/watch?v=MedklDb71Jw
2- https://www.youtube.com/watch?v=F6OaYojEoog
3- https://www.youtube.com/watch?v=Wc1E1zR40gw
Two old Xcom videos explaining some of the basic concepts behind cannon
https://www.youtube.com/watch?v=XV454aiuTEE
https://www.youtube.com/watch?v=t61qa7EPlH4
Explanation of TNT duplication
Tnt physics (x and z axis is now highest velocity first,y always come first)
How to program a cannon destination:
https://youtu.be/UlhnxoN7U4g?t=554
TNT Explosion Height (not same as eye height): 0.98F*0.0625D= 0.061250001192092896
TNT Eye Height (keep in mind that this is not used for velocity calculations as tnt is an exception, check out ?explosioncode for more info): (double)0.15F= 0.15000000596046448
Pearl Eye Height: 0.85F*0.25D= 0.21250000596046448
Arrow Eye Height: (double)0.13F= 0.12999999523162842
Player Eye Height (elytra): (double)0.4D= 0.4000000059604645
Llama Eye Height: (double)(0.95F*0.87F)= 1.7764999866485596
Rewritten explosion entity velocity code by intricate:
public Vec3d getVelocityOptimized(Vec3d pos, double eyeHeight, float exposure, boolean tnt) {
// Get distance from explosion to entity feet
double distanceNormalized = (double) (pos.distanceTo(this.pos) / (this.power * 2.0F));
// Exit if distance is too high
if (distanceNormalized > 1.0D) return new Vec3d(0, 0, 0);
// Get direction vector, different for tnt for some reason
Vec3d dir = new Vec3d(pos.x - this.pos.x, (tnt ? pos.y : pos.y + eyeHeight) - this.pos.y, pos.z - this.pos.z);
// Exit if direction vector is 0
if(dir.length() == 0.0D) return new Vec3d(0, 0, 0);
// Normalize direction vector
dir = dir.multiply(1 / dir.length());
// Velocity magnitude is (1 - distance/2power) * exposure
return dir.multiply((1.0D - distanceNormalized) * (double) exposure);
}https://cdn.discordapp.com/attachments/809608573109403684/879070325172760616/TNT.png
History of TNT compression and Explanation of TNT duplication videos seem to be flipped here.