KevinBlast/marble/server/scripts/radiusdamage.cs

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2024-03-10 20:27:00 -04:00
//-----------------------------------------------------------------------------
// Torque Game Engine
//
// Copyright (c) 2001 GarageGames.Com
//-----------------------------------------------------------------------------
// Support function which applies damage to objects within the radius of
// some effect, usually an explosion. This function will also optionally
// apply an impulse to each object.
function radiusDamage(%sourceObject, %position, %radius, %damage, %damageType, %impulse)
{
// Use the container system to iterate through all the objects
// within our explosion radius. We'll apply damage to all ShapeBase
// objects.
InitContainerRadiusSearch(%position, %radius, $TypeMasks::ShapeBaseObjectType);
%halfRadius = %radius / 2;
while ((%targetObject = containerSearchNext()) != 0) {
// Calculate how much exposure the current object has to
// the explosive force. The object types listed are objects
// that will block an explosion. If the object is totally blocked,
// then no damage is applied.
%coverage = calcExplosionCoverage(%position, %targetObject,
$TypeMasks::InteriorObjectType | $TypeMasks::TerrainObjectType |
$TypeMasks::ForceFieldObjectType | $TypeMasks::VehicleObjectType);
if (%coverage == 0)
continue;
// Radius distance subtracts out the length of smallest bounding
// box axis to return an appriximate distance to the edge of the
// object's bounds, as opposed to the distance to it's center.
%dist = containerSearchCurrRadiusDist();
// Calculate a distance scale for the damage and the impulse.
// Full damage is applied to anything less than half the radius away,
// linear scale from there.
%distScale = (%dist < %halfRadius)? 1.0:
1.0 - ((%dist - %halfRadius) / %halfRadius);
// Apply the damage
%targetObject.damage(%sourceObject, %position,
%damage * %coverage * %distScale, %damageType);
// Apply the impulse
if (%impulse) {
%impulseVec = VectorSub(%targetObject.getWorldBoxCenter(), %position);
%impulseVec = VectorNormalize(%impulseVec);
%impulseVec = VectorScale(%impulseVec, %impulse * %distScale);
%targetObject.applyImpulse(%position, %impulseVec);
}
}
}