public void UpdateTransform(cTransform transform)
{
Matrix4 scaleMat = Matrix4.CreateScale(transform.Scale);
Matrix4 rotateMat = Matrix4.CreateRotationX(transform.Rotation.X) * Matrix4.CreateRotationY(transform.Rotation.Y) * Matrix4.CreateRotationZ(transform.Rotation.Z);
Matrix4 translateMat = Matrix4.CreateTranslation(transform.Translation);
transform.Transform = scaleMat * rotateMat * translateMat;
transform.Up = new Vector3(transform.Transform[1, 0], transform.Transform[1, 1], transform.Transform[1, 2]).Normalized();
transform.Forward = -new Vector3(transform.Transform[2, 0], transform.Transform[2, 1], transform.Transform[2, 2]).Normalized();
transform.Right = new Vector3(transform.Transform[0, 0], transform.Transform[0, 1], transform.Transform[0, 2]).Normalized();
}
public void SetTransform(cTransform transform)
{
Matrix4 scaleMat = Matrix4.CreateScale(transform.Scale);
Matrix4 rotateMat = Matrix4.CreateRotationX(transform.Rotation.X) * Matrix4.CreateRotationY(transform.Rotation.Y) * Matrix4.CreateRotationZ(transform.Rotation.Z);
Matrix4 translateMat = Matrix4.CreateTranslation(transform.Translation);
transform.Transform = scaleMat * rotateMat * translateMat;
//Sets facing direction vectors in 3d space
transform.Up = new Vector3(transform.Transform[1, 0], transform.Transform[1, 1], transform.Transform[1, 2]);
transform.Forward = -new Vector3(transform.Transform[2, 0], transform.Transform[2, 1], transform.Transform[2, 2]);
transform.Right = new Vector3(transform.Transform[0, 0], transform.Transform[0, 1], transform.Transform[0, 2]);
}
public void OnAction()
{
foreach (oEntity entity in entityList)
{
//Retrieves list of components from current entity
List <IComponent> components = entity.Components;
//Retrieves transform component from current entity
IComponent transformComponent = components.Find(delegate(IComponent component)
{
return(component.ComponentMask == ComponentMasks.COMPONENT_TRANSFORM);
});
//Sets transform if not already set
if (((cTransform)transformComponent).SetTransform == false)
{
UpdateTransform((cTransform)transformComponent);
((cTransform)transformComponent).SetTransform = true;
}
//Retrieves speed component from current entity
IComponent speedComponent = components.Find(delegate(IComponent component)
{
return(component.ComponentMask == ComponentMasks.COMPONENT_SPEED);
});
//Retrieves AI component from current entity
IComponent aiComponent = components.Find(delegate(IComponent component)
{
return(component.ComponentMask == ComponentMasks.COMPONENT_AI);
});
#region AI movement
//Checks if the entity has an AI component, then applies movement based on AI path
if (aiComponent != null && ((cAI)aiComponent).DestinationReached != true)
{
cAI ai = ((cAI)aiComponent);
float velocity = ((cSpeed)speedComponent).Speed;
cTransform transform = ((cTransform)transformComponent);
Vector3 direction;
float angle;
//Finds the direction towards the target node
direction = new Vector3(ai.NextNodeLocation - transform.Translation).Normalized();
//Finds the angle between the target direction and the agent forward vector
angle = (float)(Math.Atan2(direction.X, direction.Z) - Math.Atan2(transform.Right.X, transform.Right.Z));
//if the angle is over 180 in either direction then invert it to be a smaller angle in the opposite direction
if (angle > Math.PI)
{
angle -= (float)(2 * Math.PI);
}
if (angle < -Math.PI)
{
angle += (float)(2 * Math.PI);
}
//Rotates the agent towards the target location if not facing it
transform.Rotation += new Vector3(0, angle, 0);
//Moves agent towards target location
transform.Translation += transform.Right * velocity * sceneManager.dt;
//Checks if entity is moving left
if (direction.X < -0.3f)
{
//Checks if entity has reached the next node then sets current node to the next node causing the AI system to update to a new next node
if ((transform.Translation.X) < (ai.NextNodeLocation.X + 0.1f))
{
ai.CurrentNode = ai.NextNode;
}
}
//Checks if entity is moving down
else if (direction.Z < -0.3f)
{
//Checks if entity has reached the next node then sets current node to the next node causing the AI system to update to a new next node
if ((transform.Translation.Z) < (ai.NextNodeLocation.Z + 0.1f))
{
ai.CurrentNode = ai.NextNode;
}
}
else
{
//Checks if entity has reached the next node then sets current node to the next node causing the AI system to update to a new next node
if ((int)(transform.Translation.X + 0.1f) == ai.NextNodeLocation.X && (int)(transform.Translation.Z + 0.1f) == ai.NextNodeLocation.Z)
{
ai.CurrentNode = ai.NextNode;
}
}
}
#endregion
//Updates transform of entity every frame
UpdateTransform((cTransform)transformComponent);
}
}
