private static double CalculateFireDistance(WeaponFireTracePreset weaponTracePreset, Vector2D deltaPos)
{
var fireDistance = deltaPos.Length;
fireDistance = Math.Max(0, fireDistance);
// extend fire distance by start offset (yes, we're using `-` here as TraceStartWorldOffset expected to be negative)
fireDistance -= weaponTracePreset.TraceStartWorldOffset;
return(fireDistance);
}
private void Setup(
WeaponFireTracePreset weaponTracePreset,
IComponentSpriteRenderer componentSpriteRender,
Vector2D worldPositionSource,
Vector2D normalizedRay,
double fireDistance,
double totalDuration,
bool hasHit,
WeaponHitData hitData)
{
this.weaponTracePreset = weaponTracePreset;
this.componentSpriteRender = componentSpriteRender;
this.worldPositionSource = worldPositionSource;
this.normalizedRay = normalizedRay;
this.fireDistance = fireDistance;
this.totalDuration = totalDuration;
this.hasHit = hasHit;
this.hitData = hitData;
this.LateUpdate(0);
}
public static void Create(
WeaponFireTracePreset weaponTracePreset,
Vector2D worldPositionSource,
Vector2D endPosition,
WeaponHitData lastHitData,
bool hasHit)
{
if (weaponTracePreset is null)
{
// no weapon trace for this weapon
return;
}
var deltaPos = endPosition - worldPositionSource;
var fireDistance = CalculateFireDistance(weaponTracePreset, deltaPos);
if (fireDistance <= weaponTracePreset.TraceMinDistance)
{
return;
}
CalculateAngleAndDirection(deltaPos,
out var angleRad,
out var normalizedRay);
// offset start position of the ray
worldPositionSource += normalizedRay * weaponTracePreset.TraceStartWorldOffset;
// actual trace life duration is larger when has a hit
// (to provide a contact fade-out animation for the sprite length)
if (!hasHit)
{
// otherwise it's shorter on the sprite length
fireDistance -= weaponTracePreset.TraceWorldLength;
}
var totalDuration = WeaponSystemClientDisplay.SharedCalculateTimeToHit(fireDistance, weaponTracePreset);
var sceneObject = Api.Client.Scene.CreateSceneObject("Temp_WeaponTrace");
var componentSpriteRender = Api.Client.Rendering.CreateSpriteRenderer(
sceneObject,
weaponTracePreset.TraceTexture,
positionOffset: Vector2D.Zero,
spritePivotPoint: (0, 0.5),
// yes, it's actually making the weapon trace to draw in the light layer!
drawOrder: DrawOrder.Light);
componentSpriteRender.RotationAngleRad = (float)angleRad;
componentSpriteRender.BlendMode = weaponTracePreset.UseScreenBlending
? BlendMode.Screen
// it's important to use premultiplied mode here for correct rendering
: BlendMode.AlphaBlendPremultiplied;
sceneObject.AddComponent <ComponentWeaponTrace>()
.Setup(weaponTracePreset,
componentSpriteRender,
worldPositionSource,
normalizedRay,
fireDistance,
totalDuration,
hasHit,
lastHitData);
sceneObject.Destroy(totalDuration);
}
