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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "GeoThermSmokeProjectile.h"
#include "Sim/Features/Feature.h"
#include "Sim/Projectiles/ProjectileHandler.h"
#include "Sim/Misc/Wind.h"
CR_BIND_DERIVED(CGeoThermSmokeProjectile, CSmokeProjectile, (ZeroVector, ZeroVector, 1, NULL))
CR_REG_METADATA(CGeoThermSmokeProjectile, (
CR_MEMBER(geo),
CR_RESERVED(8)
))
CGeoThermSmokeProjectile::CGeoThermSmokeProjectile(
const float3& pos,
const float3& spd,
int ttl,
const CFeature* geo
)
: CSmokeProjectile(NULL, pos, spd, ttl, 6, 0.35f, 0.8f)
, geo(geo)
{}
void CGeoThermSmokeProjectile::Update()
{
UpdateDir();
// NOTE:
// speed.w is never changed from its initial value (!), otherwise the
// particles would just keep accelerating even when wind == ZeroVector
// due to UpVector being added each frame --> if |speed| grows LARGER
// than speed.w then newSpeed will be adjusted downward and vice versa
CWorldObject::SetVelocity(speed + UpVector);
CWorldObject::SetVelocity(speed + XZVector * (wind.GetCurrentWind() / GAME_SPEED));
const float curSpeed = fastmath::sqrt(speed.SqLength());
const float newSpeed = speed.w * (speed.w / curSpeed);
CWorldObject::SetVelocity((dir = (speed / curSpeed)) * newSpeed);
CSmokeProjectile::Update();
}
void CGeoThermSmokeProjectile::UpdateDir()
{
if (geo == NULL)
return;
const CSolidObject* obj = geo->solidOnTop;
if (obj == NULL)
return;
if (!obj->HasCollidableStateBit(CSolidObject::CSTATE_BIT_SOLIDOBJECTS))
return;
float3 geoVector = pos - obj->pos;
if (geoVector.SqLength() == 0.0f)
return;
if (geoVector.SqLength() >= (obj->radius * obj->radius))
return;
geoVector *= (obj->radius * fastmath::isqrt(geoVector.SqLength()));
SetPosition(pos * 0.3f + (obj->pos + geoVector) * 0.7f);
if (geoVector.y >= (obj->radius * 0.4f))
return;
// escape sideways if covered by geothermal object (unreliable)
const float3 orthoDir = float3(geoVector.z, 0.0f, -geoVector.x);
const float3 newDir = (geoVector.cross(orthoDir)).ANormalize();
SetVelocityAndSpeed(newDir * speed.w);
}
void CGeoThermSmokeProjectile::GeoThermDestroyed(const CFeature* geo)
{
for (ProjectileContainer::iterator it = projectileHandler->unsyncedProjectiles.begin(); it != projectileHandler->unsyncedProjectiles.end(); ++it) {
CGeoThermSmokeProjectile* geoPuff = dynamic_cast<CGeoThermSmokeProjectile*>(*it);
if (geoPuff == NULL)
continue;
if (geoPuff->geo != geo)
continue;
geoPuff->geo = NULL;
}
}
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