/// <summary>
/// Draws the an arc in world space from startPosition to endPosition, using the indicated color.
/// </summary>
/// <param name="startPosition">Start position.</param>
/// <param name="endPosition">End position.</param>
/// <param name="drawColor">Draw color.</param>
public static void DrawArc(Vector3 startPosition, Vector3 endPosition, Color drawColor)
{
ParticleSystem pSystem = getParticleSystem();
float arcHeight = 3; // meters (local constant)
float segLength = .1f; // meters (local constant)
float particleSize = .3f;
float particleLife = .2f;
float speed = .1f;
float distance = Vector3.Distance(startPosition, endPosition);
float vertDistance = endPosition.y - startPosition.y;
Vector3 planarDirection = endPosition - startPosition;
planarDirection.Scale(Vector3.right + Vector3.forward);
planarDirection.Normalize();
int numSegments = (int)Mathf.Clamp(distance / segLength, 1, 360);
pSystem.Emit(startPosition, PRand.RandomVector3() * speed, particleSize, particleLife, drawColor);
for (int i = 1; i < numSegments - 1; i++)
{
float verticalPosition = arcHeight * Mathf.Sin(Mathf.PI * i / numSegments);
Vector3 pointPosition = planarDirection * i * segLength;
pointPosition.y = verticalPosition + i * vertDistance / numSegments;
pSystem.Emit(startPosition + pointPosition, PRand.RandomVector3() * speed, particleSize, particleLife, drawColor);
}
pSystem.Emit(endPosition, PRand.RandomVector3() * speed, particleSize, particleLife, drawColor);
}
/// <summary>
/// Returns a color with adjusted saturation. Equal chance to saturate or desaturate.
/// </summary>
/// <returns>A color.</returns>
/// <param name="color">The source Color.</param>
/// <param name="saturationVariance">Saturation variance.</param>
public static Color RandomSaturation(Color color, float saturationVariance)
{
if (PRand.RandomBool())
{
return(Palette.Desaturate(color, 0.5f * saturationVariance * Random.value));
}
else
{
return(Palette.Saturate(color, 0.5f * saturationVariance * Random.value));
}
}
