hi friends I'm working on a strategic game like Sims, I've a house (with fixed map), and I've characters to move in, currently I use node system to move my char (char moves by clicking mouse like sims), and I've defined several pathes between specific locations, these pathes are made of several nodes (usually between 15 to 30 nodes), which my chars traverse one by one, but this technique doesn't always work smoothly (I want to simulate it like sims), is there any sample? any tips, algorithsm? pseudo codes? please guide me thanks in advance

A* it is, my friend.

A* is generally the go to option when it comes to pathfinding and in your case it seems perfect.

This is the link that I used to get to grips with it the first time.

A* For Beginners

Alternativly you might want to look into flocking algorithms. It wont seem as rigid as what A* will produce and gives automatic obstacle avoidance.