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2f176310810813a0c70c71f802af9dc7f907ae5d
firestorm/Gameleap/code/mw4/Libraries/gosFX/SpinningCloud.cpp
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Cyd 2b8ca921cb Initial full mirror of c:\VWE (source + assets + toolchain + outputs) via Git LFS 
Complete disaster-recovery snapshot: engine/game source, game data assets,
VC6 toolchain + DX SDKs, build outputs, deployed game, and _UNUSED archive.
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no eol attributes). See RECOVERY.md for the one-clone rebuild procedure.
2026-06-24 21:28:16 -05:00

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#include "gosFXHeaders.hpp"
//==========================================================================//
// File: gosFX_SpinningCloud.cpp //
// Project: gosFX //
// Contents: Base gosFX::SpinningCloud Component //
//--------------------------------------------------------------------------//
// Date Who Modification //
// 09/28/98 JTR Created //
// //
//--------------------------------------------------------------------------//
// Copyright (C) 1997-1998, Virtual World Entertainment, Inc. //
// All Rights reserved worldwide //
// This unpublished sourcecode is PROPRIETARY and CONFIDENTIAL //
//==========================================================================//
//
//############################################################################
//######################## gosFX::SpinningCloud__Specification #############################
//############################################################################
//------------------------------------------------------------------------------
//
gosFX::SpinningCloud__Specification::SpinningCloud__Specification(
Stuff::RegisteredClass::ClassID class_id,
Stuff::MemoryStream *stream,
int gfx_version
):
ParticleCloud__Specification(class_id, stream, gfx_version)
{
Check_Pointer(this);
//
//-----------------
// Load the fcurves
//-----------------
//
m_pSpin.Load(stream, gfx_version);
m_pScale.Load(stream, gfx_version);
//
//-----------------------
// Load the rotation flag
//-----------------------
//
*stream >> m_randomStartingRotation;
*stream >> m_alignZUsingX >> m_alignZUsingY;
if (gfx_version >= 10)
*stream >> m_alignYUsingVelocity;
else
m_alignYUsingVelocity = false;
}
//------------------------------------------------------------------------------
//
gosFX::SpinningCloud__Specification::SpinningCloud__Specification(
Stuff::RegisteredClass::ClassID class_id
):
ParticleCloud__Specification(class_id)
{
Check_Pointer(this);
m_randomStartingRotation = false;
m_alignZUsingX = false;
m_alignZUsingY = false;
m_alignYUsingVelocity = false;
}
//------------------------------------------------------------------------------
//
gosFX::SpinningCloud__Specification::~SpinningCloud__Specification()
{
Check_Object(this);
}
//------------------------------------------------------------------------------
//
void
gosFX::SpinningCloud__Specification::Save(Stuff::MemoryStream *stream)
{
Check_Object(this);
Check_Object(stream);
BaseClass::Save(stream);
m_pSpin.Save(stream);
m_pScale.Save(stream);
*stream << m_randomStartingRotation << m_alignZUsingX << m_alignZUsingY;
*stream << m_alignYUsingVelocity;
}
//------------------------------------------------------------------------------
//
void
gosFX::SpinningCloud__Specification::BuildDefaults()
{
Check_Object(this);
BaseClass::BuildDefaults();
m_randomStartingRotation = false;
m_alignZUsingX = false;
m_alignZUsingY = false;
m_alignYUsingVelocity = false;
m_pSpin.m_ageCurve.SetCurve(0.0f);
m_pSpin.m_seeded = false;
m_pSpin.m_seedCurve.SetCurve(1.0f);
m_pScale.m_ageCurve.SetCurve(1.0f);
m_pScale.m_seeded = false;
m_pScale.m_seedCurve.SetCurve(1.0f);
}
//------------------------------------------------------------------------------
//
bool
gosFX::SpinningCloud__Specification::IsDataValid(bool fix_data)
{
Check_Object(this);
Stuff::Scalar min,max;
m_pScale.ExpensiveComputeRange(&min,&max);
if (min<5.0f*Stuff::SMALL)
{
if (fix_data)
m_pScale.SetMinimum(10.0f*Stuff::SMALL);
else
return false;
}
return BaseClass::IsDataValid(fix_data);
}
//------------------------------------------------------------------------------
//
void
gosFX::SpinningCloud__Specification::Copy(SpinningCloud__Specification *spec)
{
Check_Object(this);
Check_Object(spec);
BaseClass::Copy(spec);
gos_PushCurrentHeap(Heap);
m_pSpin = spec->m_pSpin;
m_pScale = spec->m_pScale;
m_randomStartingRotation = spec->m_randomStartingRotation;
m_alignZUsingX = spec->m_alignZUsingX;
m_alignZUsingY = spec->m_alignZUsingY;
m_alignYUsingVelocity = spec->m_alignYUsingVelocity;
gos_PopCurrentHeap();
}
//############################################################################
//############################## gosFX::SpinningCloud ################################
//############################################################################
gosFX::SpinningCloud::ClassData*
gosFX::SpinningCloud::DefaultData = NULL;
//------------------------------------------------------------------------------
//
void
gosFX::SpinningCloud::InitializeClass()
{
Verify(!DefaultData);
DefaultData =
new ClassData(
SpinningCloudClassID,
"gosFX::SpinningCloud",
BaseClass::DefaultData,
NULL,
NULL
);
Check_Object(DefaultData);
}
//------------------------------------------------------------------------------
//
void
gosFX::SpinningCloud::TerminateClass()
{
Check_Object(DefaultData);
delete DefaultData;
DefaultData = NULL;
}
//------------------------------------------------------------------------------
//
gosFX::SpinningCloud::SpinningCloud(
ClassData *class_data,
Specification *spec,
unsigned flags
):
ParticleCloud(class_data, spec, flags)
{
}
//------------------------------------------------------------------------------
//
bool
gosFX::SpinningCloud::Execute(ExecuteInfo *info)
{
Check_Object(this);
Check_Object(info);
GFX_LOGIC("Execute::SpinningCloud");
//
//----------------------------------------
// If we aren't supposed to execute, don't
//----------------------------------------
//
if (!IsExecuted())
return false;
//
//------------------------------------------------------------------
// Animate the particles. If it is time for us to die, return false
//------------------------------------------------------------------
//
if (!BaseClass::Execute(info))
return false;
//
//-----------------------------------------------------------------------
// If there are active particles to animate, get the current center point
// of the bounds
//-----------------------------------------------------------------------
//
if (m_activeParticleCount > 0)
{
GFX_LOGIC("Execute::ComputeBounds::SpinningCloud");
Stuff::ExtentBox box(Stuff::Point3D::Identity, Stuff::Point3D::Identity);
unsigned i=0;
//
//-------------------------------------------------------------------
// If there is no bounds yet, we need to create our extent box around
// the first legal point we find
//-------------------------------------------------------------------
//
while (i<m_activeParticleCount)
{
Particle *particle = GetParticle(i++);
Check_Object(particle);
//
//-----------------------------------------------------------
// We have found our first particle, so put the box around it
//-----------------------------------------------------------
//
if (particle->m_age < 1.0f)
{
box.maxX =
particle->m_localTranslation.x
+ particle->m_radius*particle->m_scale;
box.minX =
particle->m_localTranslation.x
- particle->m_radius*particle->m_scale;
box.maxY =
particle->m_localTranslation.y
+ particle->m_radius*particle->m_scale;
box.minY =
particle->m_localTranslation.y
- particle->m_radius*particle->m_scale;
box.maxZ =
particle->m_localTranslation.z
+ particle->m_radius*particle->m_scale;
box.minZ =
particle->m_localTranslation.z
- particle->m_radius*particle->m_scale;
break;
}
}
//
//-----------------------------
// Look for the other particles
//-----------------------------
//
while (i<m_activeParticleCount)
{
Particle *particle = GetParticle(i++);
Check_Object(particle);
if (particle->m_age < 1.0f)
{
Stuff::ExtentBox local_box;
local_box.minX =
particle->m_localTranslation.x
- particle->m_radius*particle->m_scale;
local_box.maxX =
particle->m_localTranslation.x
+ particle->m_radius*particle->m_scale;
local_box.minY =
particle->m_localTranslation.y
- particle->m_radius*particle->m_scale;
local_box.maxY =
particle->m_localTranslation.y
+ particle->m_radius*particle->m_scale;
local_box.minZ =
particle->m_localTranslation.z
- particle->m_radius*particle->m_scale;
local_box.maxZ =
particle->m_localTranslation.z
+ particle->m_radius*particle->m_scale;
box.Union(box, local_box);
}
}
//
//------------------------------------
// Now, build a info->m_bounds around this box
//------------------------------------
//
Verify(box.maxX >= box.minX);
Verify(box.maxY >= box.minY);
Verify(box.maxZ >= box.minZ);
Stuff::OBB local_bounds = Stuff::OBB::Identity;
local_bounds.axisExtents.x = 0.5f * (box.maxX - box.minX);
local_bounds.axisExtents.y = 0.5f * (box.maxY - box.minY);
local_bounds.axisExtents.z = 0.5f * (box.maxZ - box.minZ);
local_bounds.localToParent(3,0) = box.minX + local_bounds.axisExtents.x;
local_bounds.localToParent(3,1) = box.minY + local_bounds.axisExtents.y;
local_bounds.localToParent(3,2) = box.minZ + local_bounds.axisExtents.z;
local_bounds.sphereRadius = local_bounds.axisExtents.GetLength() + Stuff::SMALL;
Stuff::OBB parent_bounds;
parent_bounds.Multiply(local_bounds, m_localToParent);
info->m_bounds->Union(*info->m_bounds, parent_bounds);
}
//
//----------------------------------------------
// Tell our caller that we get to keep executing
//----------------------------------------------
//
return true;
}
//------------------------------------------------------------------------------
//
void
gosFX::SpinningCloud::CreateNewParticle(
unsigned index,
Stuff::Point3D *translation
)
{
//
//---------------------------
// Let our parent do creation
//---------------------------
//
BaseClass::CreateNewParticle(index, translation);
//
//--------------------------------------
// Figure out where the particle is born
//--------------------------------------
//
Specification *spec = GetSpecification();
Check_Object(spec);
Particle *particle = GetParticle(index);
Check_Object(particle);
Stuff::Scalar seed = particle->m_seed;
Stuff::Scalar age = m_age;
particle->m_localTranslation = *translation;
//
//---------------------------------
// Figure out the particle rotation
//---------------------------------
//
particle->m_angularVelocity.x = spec->m_pSpin.ComputeValue(age, seed);
particle->m_angularVelocity.y = spec->m_pSpin.ComputeValue(age, seed);
particle->m_angularVelocity.z = spec->m_pSpin.ComputeValue(age, seed);
//
//-----------------------------------------------------
// If we are aligning with velocity, deal with that now
//-----------------------------------------------------
//
if (spec->m_alignYUsingVelocity)
{
Stuff::LinearMatrix4D basis(true);
basis.AlignLocalAxisToWorldVector(
particle->m_localLinearVelocity,
Stuff::Y_Axis,
Stuff::X_Axis,
Stuff::Z_Axis
);
particle->m_localRotation = basis;
}
else if (spec->m_randomStartingRotation)
{
Stuff::EulerAngles
rotation(
Stuff::Two_Pi*Stuff::Random::GetFraction(),
Stuff::Pi*Stuff::Random::GetFraction(),
Stuff::Two_Pi*Stuff::Random::GetFraction()
);
particle->m_localRotation = rotation;
}
else
particle->m_localRotation = Stuff::UnitQuaternion::Identity;
}
//------------------------------------------------------------------------------
//
bool
gosFX::SpinningCloud::AnimateParticle(
unsigned index,
const Stuff::LinearMatrix4D *world_to_new_local,
Stuff::Time till
)
{
Check_Object(this);
PARTICLE_LOGIC("Spinner");
//
//-----------------------------------------------------------------------
// If this cloud is unparented, we need to transform the point from local
// space into world space and set the internal position/velocity pointers
// to these temporary values
//-----------------------------------------------------------------------
//
Particle *particle = GetParticle(index);
Check_Object(particle);
Stuff::Scalar age = particle->m_age;
if (age >= 1.0f)
return false;
Stuff::Point3D *translation = &particle->m_localTranslation;
Stuff::UnitQuaternion *rotation = &particle->m_localRotation;
Stuff::Vector3D *velocity = &particle->m_localLinearVelocity;
int sim_mode = GetSimulationMode();
if (sim_mode == DynamicWorldSpaceSimulationMode)
{
particle->m_worldTranslation.Multiply(*translation, m_localToWorld);
Stuff::LinearMatrix4D local_rot(*rotation);
Stuff::LinearMatrix4D world_rot;
world_rot.Multiply(local_rot, m_localToWorld);
particle->m_worldRotation = world_rot;
particle->m_worldLinearVelocity.Multiply(*velocity, m_localToWorld);
translation = &particle->m_worldTranslation;
rotation = &particle->m_worldRotation;
velocity = &particle->m_worldLinearVelocity;
}
Check_Object(translation);
Check_Object(rotation);
Check_Object(velocity);
//
//------------------------------------------------------------------
// First, calculate the drag on the particle. Drag can never assist
// velocity
//------------------------------------------------------------------
//
Stuff::Scalar seed = particle->m_seed;
Specification *spec = GetSpecification();
Check_Object(spec);
Stuff::Scalar drag = -spec->m_pDrag.ComputeValue(age, seed);
Max_Clamp(drag, 0.0f);
Stuff::Vector3D ether;
ether.x = spec->m_pEtherVelocityX.ComputeValue(age, seed);
ether.y = spec->m_pEtherVelocityY.ComputeValue(age, seed);
ether.z = spec->m_pEtherVelocityZ.ComputeValue(age, seed);
Stuff::Vector3D accel(Stuff::Vector3D::Identity);
//
//-------------------------------------------------------------------
// Deal with pseudo-world simulation. In this mode, we interpret the
// forces as if they are already in worldspace, and we transform them
// back to local space
//-------------------------------------------------------------------
//
if (sim_mode == StaticWorldSpaceSimulationMode)
{
Stuff::LinearMatrix4D world_to_effect;
world_to_effect.Invert(m_localToWorld);
Stuff::Vector3D local_ether;
local_ether.MultiplyByInverse(ether, world_to_effect);
Stuff::Vector3D rel_vel;
rel_vel.Subtract(*velocity, local_ether);
accel.Multiply(rel_vel, drag);
//
//-----------------------------------------
// Now, add in acceleration of the particle
//-----------------------------------------
//
Stuff::Vector3D world_accel;
world_accel.x = spec->m_pAccelerationX.ComputeValue(age, seed);
world_accel.y = spec->m_pAccelerationY.ComputeValue(age, seed);
world_accel.z = spec->m_pAccelerationZ.ComputeValue(age, seed);
Stuff::Vector3D local_accel;
local_accel.Multiply(world_accel, world_to_effect);
accel += local_accel;
}
//
//----------------------------------------------------------------------
// Otherwise, just add the forces in the same space the particles are in
//----------------------------------------------------------------------
//
else
{
Stuff::Vector3D rel_vel;
rel_vel.Subtract(*velocity, ether);
accel.Multiply(rel_vel, drag);
//
//-----------------------------------------
// Now, add in acceleration of the particle
//-----------------------------------------
//
accel.x += spec->m_pAccelerationX.ComputeValue(age, seed);
accel.y += spec->m_pAccelerationY.ComputeValue(age, seed);
accel.z += spec->m_pAccelerationZ.ComputeValue(age, seed);
}
//
//-------------------------------------------------
// Compute the particle's new velocity and position
//-------------------------------------------------
//
Stuff::Scalar time_slice =
static_cast<Stuff::Scalar>(till - m_lastRan);
velocity->AddScaled(*velocity, accel, time_slice);
translation->AddScaled(*translation, *velocity, time_slice);
//
//-----------------------
// Deal with the rotation
//-----------------------
//
if (!spec->m_alignYUsingVelocity)
{
Stuff::Vector3D omega(particle->m_angularVelocity);
omega *= time_slice;
Stuff::UnitQuaternion omega_q;
omega_q = omega;
rotation->Multiply(omega_q, Stuff::UnitQuaternion(*rotation));
rotation->Normalize();
}
//
//---------------------------------------------------------------------
// If we are unparented, we need to transform the velocity and position
// data back into the NEW local space
//---------------------------------------------------------------------
//
if (sim_mode == DynamicWorldSpaceSimulationMode)
{
Check_Object(world_to_new_local);
particle->m_localLinearVelocity.Multiply(*velocity, *world_to_new_local);
particle->m_localTranslation.Multiply(*translation, *world_to_new_local);
Stuff::LinearMatrix4D world_rot(*rotation);
Stuff::LinearMatrix4D local_rot;
local_rot.Multiply(world_rot, *world_to_new_local);
particle->m_localRotation = local_rot;
}
//
//------------------------------------------------------------
// If we are aligning Y using velocity, do the calculation now
//------------------------------------------------------------
//
if (spec->m_alignYUsingVelocity)
{
Stuff::LinearMatrix4D basis(true);
basis.AlignLocalAxisToWorldVector(
particle->m_localLinearVelocity,
Stuff::Y_Axis,
Stuff::X_Axis,
Stuff::Z_Axis
);
particle->m_localRotation = basis;
}
//
//------------------
// Animate the scale
//------------------
//
particle->m_scale = spec->m_pScale.ComputeValue(age, seed);
return true;
}
//------------------------------------------------------------------------------
//
void
gosFX::SpinningCloud::TestInstance() const
{
Verify(IsDerivedFrom(DefaultData));
}
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