/// <summary>
/// Creates a lightning effect relative to the screen. Must be called in a Draw function.
/// </summary>
/// <param name="screenStartPos"></param>
/// <param name="screenEndPos"></param>
/// <param name="scale"></param>
/// <param name="color"></param>
public static void DrawScreenLightning(Vector2 screenStartPos, Vector2 screenEndPos, float scale, Color color)
{
var rand = TmlLibraries.SafelyGetRand();
var segs = new List <(Vector2 Beg, Vector2 End)>();
Vector2 startPos = screenStartPos;
while ((startPos - screenEndPos).LengthSquared() > 2304) //48^2
{
Vector2 dir = Vector2.Normalize(screenEndPos - startPos);
Vector2 reach = dir * rand.Next(16, 80);
float remainingLenFromStartSqr = (screenEndPos - startPos).LengthSquared();
if (reach.LengthSquared() > remainingLenFromStartSqr)
{
break;
}
Vector2 testEndPos;
float testLenSqr;
do
{
testEndPos = startPos + reach;
testEndPos += new Vector2(rand.Next(80) - 40, rand.Next(80) - 40);
testLenSqr = (screenEndPos - testEndPos).LengthSquared();
} while(testLenSqr < 256 || testLenSqr > remainingLenFromStartSqr);
segs.Add((startPos, testEndPos));
startPos = testEndPos;
}
segs.Add((startPos, screenEndPos));
//LogLibraries.LogAndPrintOnce( "segs: "+segs.Count+", length: "+(screenStartPos-screenEndPos).Length()
// +", scrStart: "+screenStartPos.ToShortString()+", scrEnd: "+screenEndPos.ToShortString()
// +", segs: "+string.Join(", ", segs.Select(seg=>seg.Beg.ToShortString()+"->"+seg.End.ToShortString())));
for (int i = 0; i < segs.Count; i++)
{
LightningFxLibraries.DrawLightningBeam(segs[i].Beg, segs[i].End, scale, color);
}
}
/// <summary>
/// Creates a lightning effect. Must be called in a Draw function.
/// </summary>
/// <param name="wldStartPos"></param>
/// <param name="wldEndPos"></param>
/// <param name="scale"></param>
/// <param name="color"></param>
public static void DrawLightning(Vector2 wldStartPos, Vector2 wldEndPos, float scale, Color color)
{
LightningFxLibraries.DrawScreenLightning(wldStartPos - Main.screenPosition, wldEndPos - Main.screenPosition, scale, color);
}
