public override void PreCollisionTestUpdate(GameThing thing)
{
Movement movement = thing.Movement;
DesiredMovement desiredMovement = thing.DesiredMovement;
GameActor.State state = thing.CurrentState;
float secs = Time.GameTimeFrameSeconds;
if (state != GameActor.State.Dead || state != GameThing.State.Squashed)
{
if (state == GameActor.State.Active)
{
// Only do movement if we are not being held.
if (thing.ActorHoldingThis == null)
{
// Check if we're up in the air. If so, then we don't kick up
// any dust. We can still turn while in the air but it doesn't
// affect the direction we're moving until we hit the ground.
float terrainHeight = Terrain.GetTerrainAndPathHeight(Top(movement.Position));
bool falling = terrainHeight == 0.0f;
float heightAboveGround = movement.Altitude - terrainHeight - MinHeight;
if (landing)
{
// This version doesn't clamp movement to only work forward and backward.
ApplyDesiredMovementWhenFalling(movement, desiredMovement);
}
else
{
ApplyDesiredMovement(movement, desiredMovement);
}
// Are we waiting to land?
if (landing && movement.Velocity.Z < 0.0f)
{
// Are we close enough?
float predictedHeight = heightAboveGround + movement.Velocity.Z * preLandDelay;
if (predictedHeight < CloseToGround)
{
startLandAnimation = true;
landing = false;
if (TerrainDataValid && Feelers != null)
{
Foley.PlayCollision(thing, Feelers[0].TerrainMaterialInfo.TerrainType);
}
else
{
Foley.PlayCollision(thing, 0);
}
}
}
onGround = heightAboveGround < CloseToGround;
onGround = onGround && !falling;
if (onGround)
{
// The bot is on the ground.
// Only jump if on the ground and not already jumping.
if (Jump && !jumping && !landing)
{
startJumpAnimation = true; // Tell animation to start.
jumping = true;
jumpStartTime = Time.GameTimeTotalSeconds;
jumpVelocity = new Vector2(movement.Velocity.X, movement.Velocity.Y);
float len = jumpVelocity.Length();
if (len > 0.1f)
{
jumpVelocity /= len;
}
else
{
jumpVelocity = new Vector2(movement.Facing.X, movement.Facing.Y);
jumpVelocity.Normalize();
}
}
}
// Always clear jump flag.
Jump = false;
if (jumping && !landing)
{
// If the pre delay time has passed, do the jump.
if (Time.GameTimeTotalSeconds > jumpStartTime + preJumpDelay)
{
movement.Velocity += new Vector3(0, 0, effectiveJumpStrength);
jumping = false;
landing = true;
}
}
HandleMovement(movement);
// Apply drag to velocity.
ApplyFriction(movement, desiredMovement, applyVertical: false);
// Apply external force.
movement.Velocity += desiredMovement.ExternalForce.GetValueOrDefault() / thing.Mass * secs;
// Move due to velocity.
movement.Position += movement.Velocity * secs;
} // end of if not held.
} // end of if active.
} // end of if not dead
} // end of PreCollisionTestUpdate()
