public Entity GetCarAtScreenPosition(Vector3 screenPosition, float radius)
{
var result = Entity.Null;
var em = World.Active?.EntityManager;
if (em != null)
{
var query = em.CreateEntityQuery(typeof(CarState));
var entities = query.ToEntityArray(Allocator.TempJob);
for (int i = 0; i < entities.Length; ++i)
{
var state = em.GetComponentData <CarState>(entities[i]);
DotsHighway.GetWorldPosition(
state.PositionOnTrack, state.Lane, out float3 pos, out quaternion rot);
Vector3 carScreenPos = Camera.main.WorldToScreenPoint(pos);
carScreenPos.z = 0;
if (Vector3.Distance(screenPosition, carScreenPos) <= radius)
{
result = entities[i];
break;
}
}
entities.Dispose();
}
return(result);
}
public void Execute(
[ReadOnly] ref CarState state,
[ReadOnly] ref CarSettings settings,
ref Translation translation,
ref Rotation rotation,
ref ColorComponent color)
{
DotsHighway.GetWorldPosition(
state.PositionOnTrack, state.Lane, out float3 pos, out quaternion q);
translation.Value = pos;
rotation.Value = q;
bool isFaster = state.FwdSpeed > settings.DefaultSpeed;
float maxSpeed = math.select(
settings.DefaultSpeed, settings.DefaultSpeed * settings.OvertakePercent, isFaster);
float minSpeed = math.select(0, settings.DefaultSpeed, isFaster);
float4 minColor = math.select(minSpeedColor, defaultColor, isFaster);
float4 maxColor = math.select(defaultColor, maxSpeedColor, isFaster);
color.Value = math.lerp(
minColor, maxColor, (state.FwdSpeed - minSpeed) / (maxSpeed - minSpeed));
}