AI Engine update - Week ending 6/13

This week, I worked on simple agent rendering: Rendering an agent as a simple circle.

I also had to implement a Matrix, in which I had to implement different functions such as

·         Translate

·         Rotate

·         Scale

·         Transform

This really helped with my 3-D math skills as I finally understood how to create, store and operate the above properties on a game object.

After that, I worked on behaviors:

Seek

Given a target point, the agent will try to move towards that point.

First, we calculate the direction we need to move in by subtracting our position from the target position, and normalizing it:

Vec2 direction = Vec2::Normalize(targetPosition - mpAgent->GetPosition());

We then calculate the velocity required by multiplying that by the max possible velocity of the agent:

Vec2 desiredVelocity = direction * mpAgent->GetMaxSpeed();

Then the force required to get to that velocity would be the difference between that and the current velocity:

Vec2 force = desiredVelocity - mpAgent->GetVelocity();

Flee

Flee is similar to Seek, except that the agent will move away from the target point.

First, we calculate the direction we need to move in by subtracting target position from our position, and normalizing it:

Vec2 direction = Vec2::Normalize(mpAgent->GetPosition() - targetPosition);

We then calculate the velocity required by multiplying that by the max possible velocity of the agent:

Vec2 desiredVelocity = direction * mpAgent->GetMaxSpeed();

Then the force required to get to that velocity would be the difference between that and the current velocity:

Vec2 force = desiredVelocity - mpAgent->GetVelocity();

I will continue to implement more steering patterns.