Developing a Soccer Mobile Game-Part 4

This week was a very productive week for the development of the soccer game. As you can see in the video, I implemented most of the 11 players per team. Currently, I'm missing the goalies.

 
 

I improved the performance of the game by disabling shadows and collision detection on all but three players; dribbling player, receiving player and defender. Thus, at any time, the engine only renders a shadow to the player currently dribbling, the player who will get a pass and the defender. The same logic was applied to the collision system. Only three players have collision detection enabled at any time. Doing so improved the performance by 20%.

You may say that doing so will reduce the aesthetics of the game, and you are right. However, when you play a soccer game, your eyes are mainly focused on the controlling player and the defender. Your vision ignores all other players' aesthetics.

I also improved the AI of the game. Supporter players no longer go out of bound whenever they search for a good passing angle. The same logic applies for defenders. They are smart enough not to go out of bound.

Additionally, I added a feature that controls the strength of the kick depending on how long you press the game buttons. The longer you press the buttons, the stronger the pass; thus the farthest the ball will travel.

Implementing the 4-4-2 team formation

Up to now, I have been developing the soccer game with relatively few game characters. The reason was obvious. I was focused on implementing the properties of individual players and not the team properties.

However, this week I focused on implementing intelligence into the team as a whole. My first task was to apply "Formation" logic into the game.

There are several formations used in soccer. I decided to use the 4-4-2 formation. That is four defenders, four midfielders and two forwards.

The idea of a formation is the following:

When the team is in attacking mode, the formation should spread out; thus creating space.

In contrast, when the team is in defending mode, the formation should shrink; reducing space. Notice that no matter the mode, the team should always keep the 4-4-2 structure.

Since at any time, the game characters could be running towards a passing angle or defending positions, it made sense to implement separate game objects that serve as reference points for the players.

These game objects (formation objects) would spread out or come together depending on the state (attacking/defending) of the team. Each player is assigned a formation object and would use the position of the formation object only as a reference. The formation objects are shown as squares in the image below.

Doing so keeps the structure of team compact and resembling a 4-4-2 formation throughout the game.

Thanks for reading.

Harold Serrano

Computer Graphics Enthusiast. Currently developing a 3D Game Engine.