// Update is called once per frame
void Update()
{
if (target == null)
{
Debug.LogWarning("this laser has no target");
return;
}
// Read gradient for laser intensity
float time = (Time.time % patternDuration) / patternDuration;
float laserIntensity = pattern.getAlpha(time);
// Override linerenderer alpha keys
for (int i = 0; i < tempAlphaKeys.Length; i++)
{
tempAlphaKeys[i].alpha = laserIntensity;
}
tempGradient.SetKeys(tempGradient.colorKeys, tempAlphaKeys);
lineRenderer.colorGradient = tempGradient;
// Combine masks
LayerMask collisionMask = waterSurfaceMask | obstacleMask;
Vector2 thisPos = transform.position;
Vector2 targetPos = target.position;
Vector2 directionDelta = targetPos - thisPos;
Vector2 direction = directionDelta.normalized;
// Raycast distance
float laserDistanceCast = directionDelta.magnitude;
// Test water & terrain
bool hitWater = false;
Vector2 waterCollisionPos = Vector3.zero;
bool hitObstacle = false;
Vector2 obstaclePos = Vector3.zero;
int waterSurfaceLayer = waterSurfaceMask.LayerMaskToLayer();
RaycastHit2D[] hits = Physics2D.RaycastAll(thisPos, direction, laserDistanceCast, collisionMask);
foreach (RaycastHit2D hit in hits)
{
// Extend through water surface
if (hit.collider.gameObject.layer == waterSurfaceLayer)
{
hitWater = true;
prevTouchedWater = true;
waterCollisionPos = hit.point;
lastDetectedWaterCollider = hit.collider;
lastDetectedWaterY = waterCollisionPos.y;
}
// Terrain or body, stop extending
else
{
hitObstacle = true;
obstaclePos = hit.point;
// Reduce health if has health
Health targetHealth = hit.collider.GetComponent <Health>();
if (targetHealth != null)
{
float damage = laserDamage * laserIntensity * Time.deltaTime;
if (damage > 0.0f)
{
targetHealth.damage(damage);
}
}
break;
}
}
// Laser end point
Vector2 laserEndPos = Vector2.zero;
if (hitObstacle)
{
laserEndPos = obstaclePos;
}
else
{
laserEndPos = thisPos + direction * laserDistanceCast;
}
// Set line renderer
lineRenderer.SetPosition(0, Vector2.zero);
lineRenderer.SetPosition(1, laserEndPos - thisPos);
// Evaluate if laser shoots into water or out of water
// or completely submerged pr completely above water
if (!hitWater)
{
// Never touched water OR previously touched water surface went below
if ((!prevTouchedWater && lastDetectedWaterCollider == null) || (lastDetectedWaterCollider != null && thisPos.y >= lastDetectedWaterCollider.transform.position.y))
{
state = aquaMode.aboveWater;
}
else
{
state = aquaMode.belowWater;
}
}
else
{
if (direction.y < 0.0f)
{
state = aquaMode.intoWater;
}
else
{
state = aquaMode.outtaWater;
}
}
// Emit bubbles from submerged laser segment
if (state != aquaMode.aboveWater && laserIntensity > 0.0f)
{
laserParticle.keepOn();
}
else
{
laserParticle.keepOff();
}
Vector2 waterBubbleStartPos = Vector2.zero;
Vector2 waterBubbleEndPos = Vector2.zero;
switch (state)
{
case aquaMode.aboveWater:
break;
case aquaMode.belowWater:
waterBubbleStartPos = thisPos;
waterBubbleEndPos = laserEndPos;
break;
case aquaMode.intoWater:
waterBubbleStartPos = waterCollisionPos;
waterBubbleEndPos = laserEndPos;
break;
case aquaMode.outtaWater:
waterBubbleStartPos = thisPos;
waterBubbleEndPos = waterCollisionPos;
break;
}
ParticleSystem.ShapeModule laserParticleShape = laserParticle.shape;
float directionAngle = Mathf.Atan2(direction.y, direction.x) * 180.0f / 3.14f;
laserParticleShape.rotation = Vector3.forward * directionAngle;
laserParticleShape.radius = Vector2.Distance(waterBubbleStartPos, waterBubbleEndPos) / 2.0f;
laserParticleShape.position = (waterBubbleStartPos + waterBubbleEndPos) / 2.0f - thisPos;
}
