public void Activate(Transform src, Transform tgt, float duration, Material mat, float beamWidth, Color col, BeamParticles bp = null)
{
// make the particles a child of this
if (bp != null && beamParticles == null)
{
beamParticles = Instantiate(bp);
beamParticles.Init(src);
}
gameObject.SetActive(true);
if (lineRenderer == null)
{
lineRenderer = GetComponent <LineRenderer>();
}
lineRenderer.enabled = (mat != null);
timer = duration;
source = src;
target = tgt.gameObject;
if (mat != null)
{
lineRenderer.material = mat;
// set the color and width of the linerenderer
lineRenderer.startColor = lineRenderer.endColor = col;
lineRenderer.startWidth = lineRenderer.endWidth = beamWidth;
// set UV titling to match distance
float distance = Vector3.Distance(src.position, tgt.position);
lineRenderer.material.SetTextureScale("_MainTex", new Vector2(2 * distance, 1));
}
}
// Update is called once per frame
void Update()
{
if (timer > 0)
{
timer -= Time.deltaTime;
if (timer < 0)
{
gameObject.SetActive(false);
lineRenderer.enabled = false;
if (beamParticles)
{
Debug.Log("Beam Particles finished");
beamParticles.Finish();
beamParticles = null;
}
}
// set UV titling to match distance
float distance = Vector3.Distance(source.position, target.transform.position);
if (lineRenderer.enabled)
{
// repeat the texture once per metre, so the beam doesn't distort with length
lineRenderer.material.SetTextureScale("_MainTex", new Vector2(2 * distance, 1));
// scroll the beam according to our speed
lineRenderer.material.SetTextureOffset("_MainTex", new Vector2(timer * uvSpeed, 0));
// fade out at last 0.2 secs
Color col = lineRenderer.startColor;
col.a = timer * 5.0f;
lineRenderer.startColor = lineRenderer.endColor = col;
if (target)
{
pts[0] = source.position;
pts[1] = target.transform.position;
lineRenderer.SetPositions(pts);
}
else
{
Debug.Log("Beam has no target?");
}
}
// update any particles on the beam
if (beamParticles)
{
beamParticles.UpdateParticles(this);
}
}
}
