} // DrawBoundingSphere
#endregion
#region Draw curve
/// <summary>
/// Draws a curve in world space.
/// </summary>
public static void Draw3DCurve(Curve3D curve, Color color, int step = 50)
{
if (!hasBegun || begin2D || primitiveType != PrimitiveType.LineList)
{
throw new InvalidOperationException("Line Manager: you have to call Begin in 3D mode and with PrimitiveType.LineList selected.");
}
AddVertex(curve.GetPoint(0), color);
for (float i = curve.CurveTotalTime / step; i < curve.CurveTotalTime; i = i + (curve.CurveTotalTime / step))
{
AddVertex(curve.GetPoint(i), color);
AddVertex(curve.GetPoint(i), color);
}
AddVertex(curve.GetPoint(curve.CurveTotalTime), color);
} // Draw3DCurve
} // Update
/// <summary>
/// Add particle.
/// </summary>
/// <param name="step">Step from last position to current position</param>
protected override void AddParticle(float step)
{
// The position of the object.
Vector3 objectPosition = Vector3.Lerp(previousPosition, Object.WorldPosition, step);
// The matrix that will be used to transform the curve to the correct position.
Matrix particleMatrix = Object.WorldRotation * Matrix.CreateTranslation(objectPosition);
// Calculate the particle position using a random curve’s point and transforming it with the previous matrix.
Vector3 particlePosition = Vector3.Transform(curve.GetPoint((float)random.NextDouble() * curve.CurveTotalTime), particleMatrix);
// Add the particle.
ParticleSystem.AddParticle(particlePosition, velocity);
} // AddParticle