private void UpdatePoints()
{
for (int i = 0; i < points.Count; i++)
{
SmokePoint point = points[i];
// Natural smoke rise.
point.Position += Vector3.up * RiseSpeed * Time.deltaTime;
// Perlin noise. Needs to be remapped from (0 to 1) to (-1 to 1).
float noiseX = Mathf.PerlinNoise(point.Age * PerlinPointCoefficient, Time.time * PerlinTimeCoefficient);
float noiseY = Mathf.PerlinNoise(point.Age * PerlinPointCoefficient + 10f, Time.time * PerlinTimeCoefficient);
float noiseZ = Mathf.PerlinNoise(point.Age * PerlinPointCoefficient + 20f, Time.time * PerlinTimeCoefficient);
noiseX = -1 + noiseX * 2f;
noiseY = -1 + noiseY * 2f;
noiseZ = -1 + noiseZ * 2f;
Vector3 noiseVel = new Vector3(noiseX, noiseY, noiseZ);
noiseVel = new Vector3(noiseVel.x * PerlinAxisScale.x, noiseVel.y * PerlinAxisScale.y, noiseVel.z * PerlinAxisScale.z) * PerlinGlobalScale;
// Apply perlin noise. Simulates the random swirls and twists in smoke trails, such as from a candle, or in this case a gun.
point.Position += noiseVel * Time.deltaTime;
// Increase age.
point.Age += Time.deltaTime;
points[i] = point;
}
}
public SmokeTrail(Vector2 startPosition)
{
StartPosition = startPosition;
for (int i = 0; i < vertices.Length / 2 + 1; i++)
{
SmokePoint smokePoint = new SmokePoint()
{
Position = StartPosition,
Acceleration = new Vector2(0, -0.05f),
Velocity = new Vector2(0, -0.5f),
Friction = new Vector2(1, 1)
};
smokePoint.Width = Random.Next(10, 20);
Positions.Add(smokePoint);
}
MaxTime3 = Random.Next(1500, 8000);
MaxTime = Random.Next(150, 800);
}
