// Raycasting Variables
private void Awake()
{
rb = GetComponent <Rigidbody2D>();
state = EntityMotionState.AIR;
rcModule = new RaycastModule(this);
ChangeForm(formIndex);
}
internal static EngineCommandResult InitEntity(Entity entity)
{
try
{
var physicsComponent = entity.Get <PhysicsComponent>(ComponentType.Physics);
if (physicsComponent == null)
{
return(EngineCommandResult.Success);
}
var isStatic = physicsComponent.Physics == PhysicsType.Static;
var collisionShape = isStatic
? (CollisionShape) new BvhTriangleMeshShape(physicsComponent.Mesh.Convert(), false)
: (CollisionShape) new ConvexTriangleMeshShape(physicsComponent.Mesh.Convert());
Engine.I.CollisionShapes.Add(collisionShape);
Vector3 inertia;
collisionShape.CalculateLocalInertia(1.0f, out inertia);
var motionState = new EntityMotionState(entity, physicsComponent.Motion == MotionType.Kinematic);
var rigidBodyInfo = new RigidBodyConstructionInfo(isStatic ? 0.0f : 1.0f, motionState, collisionShape, inertia);
var rigidBody = new RigidBody(rigidBodyInfo)
{
Friction = 1.0f,
Gravity = isStatic
? Vector3.Zero
: new Vector3(0.0f, -9.8f, 0.0f),
CollisionFlags = isStatic
? CollisionFlags.StaticObject
: physicsComponent.Motion == MotionType.Dynamic
? CollisionFlags.None
: CollisionFlags.KinematicObject,
ActivationState = physicsComponent.Motion == MotionType.Dynamic
? ActivationState.ActiveTag
: ActivationState.DisableDeactivation
};
Engine.I.World.AddRigidBody(rigidBody);
if (!isStatic && !Engine.I.Objects.ContainsKey(entity))
{
Engine.I.Objects.Add(entity, rigidBody);
}
}
catch (Exception e)
{
return(EngineCommandResult.Failed);
}
return(EngineCommandResult.Success);
}
private void CheckForLanding(Vector2 incomingVelocity)
{
// If we had negative velocity before colliding with said slope.
if (incomingVelocity.y < 0f)
{
externalVelocity.y = 0f;
if (state != EntityMotionState.GROUNDED)
{
state = EntityMotionState.GROUNDED;
OnLanding();
}
}
}
/*
* incomingVelocity may or not be equal to currentVelocity.
* When a surface is hit, it could be redirected along that surface.
*/
public void OnContactWithSurface(RaycastHit2D surfaceHit, Vector2 incomingVelocity, float surfaceNormSide)
{
float slopeNormal2OurNormal = Vector2.Angle(surfaceHit.normal, Vector2.up);
// If the angle of the surface hit is less than our climbing angle (we can stand on it), enter GroundedState.
if (Mathf.Abs(slopeNormal2OurNormal) < maxClimbAngle)
{
CheckForLanding(incomingVelocity);
}
// If the slope is too great and we are trying to go up it.
else
{
if (surfaceNormSide != 0f)
{
state = EntityMotionState.AIR;
}
}
}
public void Update()
{
// Translate the entity in the direction calculated last frame.
transform.Translate(forNextFrame);
// First check which way we are facing based on DI.
if (directionalInfluence.x > 0)
{
facingRight = true;
}
else if (directionalInfluence.x < 0)
{
facingRight = false;
}
switch (state)
{
case EntityMotionState.AIR:
WhileInAir();
break;
case EntityMotionState.GROUNDED:
if (!rcModule.CheckGround())
{
state = EntityMotionState.AIR;
}
break;
default:
break;
}
// First calculate the final velocity of the entity.
currentVelocity = CompoundVelocities(vOverride, vAdd, vMult);
// Do our Raycast Movement logic.
forNextFrame = rcModule.RaycastMovement(currentVelocity * Time.deltaTime);
Physics2D.SyncTransforms();
DecayExternalVelocity();
}
private void WhileInAir()
{
state = EntityMotionState.AIR;
subAirTime += Time.deltaTime;
sbaWhileInAir?.Invoke();
}
private void OnLanding()
{
state = EntityMotionState.GROUNDED;
sbaOnLanding?.Invoke();
ResetAirTime();
}