void Camera::SetDirection(const Vector3<float>& aDirection)
{
Matrix44<float> newOrientation = Matrix44<float>::CreateMatrixFromForwardVector(aDirection);
newOrientation.SetTranslation(myOrientation.GetTranslation());
myOrientation = newOrientation;
myFrustum.Update(myOrientation, myWidthAndHeight.myY / myWidthAndHeight.myX, myFov);
}
//! Prepares a bullet for rendering
void PelletManager::SetupRendering(Bullet* pBullet, u32 index, VertexBuffer* pVB)
{
Vertex3D* pVertices = pVB->GetVertices();
if(GraphicExtensionHandler::Instance()->HasExtension(GraphicExtensionHandler::E_PointSprite))
{
pVertices[index].Pos = pBullet->vPosition;
pVB->SetNumVertices(index+1);
}
else
{
const Matrix44& viewInverse = EntityRenderer::Instance()->Get3DCamera()->GetViewMatrixInverse();
const f32 fHalfSize = pBullet->fRadius;
const u32 vtx = index*6;
pVertices[vtx+0].UV = Vector2(0.0f, 1.0f); pVertices[vtx+0].Pos = Vector3::Create(-fHalfSize, -fHalfSize, 0.0f);
pVertices[vtx+1].UV = Vector2(0.0f, 0.0f); pVertices[vtx+1].Pos = Vector3::Create(-fHalfSize, fHalfSize, 0.0f);
pVertices[vtx+2].UV = Vector2(1.0f, 0.0f); pVertices[vtx+2].Pos = Vector3::Create(fHalfSize, fHalfSize, 0.0f);
pVertices[vtx+3].UV = Vector2(0.0f, 1.0f); pVertices[vtx+3].Pos = Vector3::Create(-fHalfSize, -fHalfSize, 0.0f);
pVertices[vtx+4].UV = Vector2(1.0f, 0.0f); pVertices[vtx+4].Pos = Vector3::Create(fHalfSize, fHalfSize, 0.0f);
pVertices[vtx+5].UV = Vector2(1.0f, 1.0f); pVertices[vtx+5].Pos = Vector3::Create(fHalfSize, -fHalfSize, 0.0f);
Matrix44 transform = viewInverse;
transform.SetTranslation(pBullet->vPosition);
for(u32 i=0; i<6; ++i)
{
pVertices[vtx+i].Pos = transform.TransformVect(pVertices[vtx+i].Pos);
}
pVB->SetNumVertices(vtx+6);
}
}
// 获取旋转平移矩阵
Matrix44 Camera::GetModelViewMatrix(void)
{
Matrix33 rotate = ori_.GetMatrix33();
Matrix44 m = Matrix44::CreateIdentity();
m.SetMatrix33(rotate);
m.SetTranslation(-pos_.x, -pos_.y, -pos_.z);
return m;
}
void ParticleSystemData::Load(const std::string& aFilePath)
{
myEmitterData.Init(4);
myOrientations.Init(4);
myTimeStamps.Init(4);
XMLReader xmlDoc;
xmlDoc.OpenDocument(aFilePath);
XMLElement emitterElement = xmlDoc.FindFirstChild();
emitterElement = emitterElement->FirstChildElement("Emitter");
while (emitterElement != nullptr)
{
XMLElement dataElement = emitterElement->FirstChildElement("Name");
std::string emitterName = dataElement->GetText();
dataElement = emitterElement->FirstChildElement("Time");
float time;
dataElement->QueryFloatText(&time);
dataElement = emitterElement->FirstChildElement("Position");
Vector3<float> position;
position.x = dataElement->FloatAttribute("x");
position.y = dataElement->FloatAttribute("y");
position.z = dataElement->FloatAttribute("z");
dataElement = emitterElement->FirstChildElement("Rotation");
Vector3<float> rotation;
rotation.x = dataElement->FloatAttribute("x");
rotation.y = dataElement->FloatAttribute("y");
rotation.z = dataElement->FloatAttribute("z");
Matrix44<float> orientation;
orientation *= Matrix44<float>::CreateRotateAroundX(rotation.x);
orientation *= Matrix44<float>::CreateRotateAroundY(rotation.y);
orientation *= Matrix44<float>::CreateRotateAroundZ(rotation.z);
orientation.SetTranslation(position);
myEmitterData.Add(emitterName);
myOrientations.Add(orientation);
myTimeStamps.Add(time);
emitterElement = emitterElement->NextSiblingElement("Emitter");
}
}
int ParticleGenerator::TesselateLine(Particle* pParticle, Vertex3D* pVertices, int current, const Vector3& vScale)
{
Vector3 vDir = (pParticle->Pos - pParticle->PreviousPos).Normalized();
pVertices[current+0].UV = Vector2::Zero; pVertices[current+0].Pos = Vector3::Zero;
pVertices[current+1].UV = Vector2::One; pVertices[current+1].Pos = vDir*vScale*m_fSparkFactor;
pParticle->PreviousPos = pParticle->Pos;
Matrix44 transform = Matrix44::Identity;
transform.SetTranslation(m_bApplyWorldTransform ? super::GetWorldTransform().TransformVect(pParticle->Pos) : pParticle->Pos);
for(int i=0; i<2; ++i)
{
pVertices[current+i].Pos = transform.TransformVect(pVertices[current+i].Pos);
pVertices[current+i].color = Color::Create(m_ParticleColor.R, m_ParticleColor.G, m_ParticleColor.B, pParticle->Alpha);
}
return 2;
}
int ParticleGenerator::TesselateQuad(Particle* pParticle, Vertex3D* pVertices, int current, const Vector3& vScale)
{
auto halfSize = pParticle->Size;
pVertices[current+0].UV = Vector2::Create(0.0f, 1.0f); pVertices[current+0].Pos = Vector3::Create(-halfSize, -halfSize, 0.0f)*vScale;
pVertices[current+1].UV = Vector2::Create(0.0f, 0.0f); pVertices[current+1].Pos = Vector3::Create(-halfSize, halfSize, 0.0f)*vScale;
pVertices[current+2].UV = Vector2::Create(1.0f, 0.0f); pVertices[current+2].Pos = Vector3::Create(halfSize, halfSize, 0.0f)*vScale;
pVertices[current+3].UV = Vector2::Create(0.0f, 1.0f); pVertices[current+3].Pos = Vector3::Create(-halfSize, -halfSize, 0.0f)*vScale;
pVertices[current+4].UV = Vector2::Create(1.0f, 0.0f); pVertices[current+4].Pos = Vector3::Create(halfSize, halfSize, 0.0f)*vScale;
pVertices[current+5].UV = Vector2::Create(1.0f, 1.0f); pVertices[current+5].Pos = Vector3::Create(halfSize, -halfSize, 0.0f)*vScale;
Matrix44 transform = m_ViewInverse;
transform.SetTranslation(m_bApplyWorldTransform ? super::GetWorldTransform().TransformVect(pParticle->Pos) : pParticle->Pos);
for(int i=0; i<6; ++i)
{
pVertices[current+i].Pos = transform.TransformVect(pVertices[current+i].Pos);
pVertices[current+i].color = Color::Create(m_ParticleColor.R, m_ParticleColor.G, m_ParticleColor.B, pParticle->Alpha);
}
return 6;
}
//! called during the update of the entity
void ParticleGenerator::Update()
{
auto camera = EntityRenderer::Instance()->Get3DCamera();
if (!camera)
return;
// generate new particles
if(m_bActive)
{
m_fNewParticlesCounter += g_fDeltaTime * m_ParticlesPerSecond;
int numNewParticles = int(m_fNewParticlesCounter);
if(m_Pool.GetElementCount() + numNewParticles > m_MaxParticles)
numNewParticles = m_MaxParticles - (int)m_Pool.GetElementCount();
// determine emission center
Vector3 vCenter = m_EmitBox.Min()+m_EmitBox.Size()/2.0f;
if(!m_bApplyWorldTransform)
vCenter = super::GetWorldTransform().TransformVect(vCenter);
Matrix44 speedTransform = super::GetWorldTransform();
speedTransform.SetTranslation(Vector3::Zero);
// Pre-emit
void* pEmitData = (this->*m_PreEmitFunctor)();
for(int i=0; i<numNewParticles; ++i)
{
auto pParticle = m_Pool.Alloc();
if(!pParticle)
continue;
pParticle->InitialLife = Random::GetFloat(m_rParticleLife.Min, m_rParticleLife.Max);
pParticle->Life = pParticle->InitialLife;
pParticle->Pos = Vector3::Create(Random::GetFloat(m_EmitBox.Min().X, m_EmitBox.Max().X),
Random::GetFloat(m_EmitBox.Min().Y, m_EmitBox.Max().Y),
Random::GetFloat(m_EmitBox.Min().Z, m_EmitBox.Max().Z));
if(!m_bApplyWorldTransform)
pParticle->Pos = super::GetWorldTransform().TransformVect(pParticle->Pos);
pParticle->PreviousPos = pParticle->Pos;
// Emit
(this->*m_EmitFunctor)(pParticle, vCenter, pEmitData);
if(!m_bApplyWorldTransform)
pParticle->Speed = speedTransform.TransformVect(pParticle->Speed);
pParticle->Alpha = 1.0f;
}
m_fNewParticlesCounter -= numNewParticles;
if(m_fActiveTime >= 0.0f)
{
m_fActiveTime -= g_fDeltaTime;
if(m_fActiveTime < 0.0f)
m_bActive = false;
}
}
// update particles
GraphicComponent* pGraphic = GetComponent<GraphicComponent>();
VertexBuffer* pVB = pGraphic->GetVertexBuffer();
Vertex3D* pVertices = reinterpret_cast<Vertex3D*>(pVB->GetVertices());
const Vector3 vScale = GetAbsoluteScale();
m_ViewInverse = camera->GetViewMatrixInverse();
m_ParticleColor = pGraphic->GetMaterial() ? pGraphic->GetMaterial()->GetColor() : Color::White;
int vtx = 0;
for (size_t i = 0; i < m_Pool.GetCapacity(); ++i)
{
auto particle = m_Pool.GetElement(i);
if (!particle)
continue;
particle->Pos += particle->Speed * g_fDeltaTime;
particle->Speed += m_vGravity * g_fDeltaTime;
auto lifeFactor = particle->Life / particle->InitialLife;
particle->Alpha = lifeFactor*lifeFactor;
particle->Size = (this->*m_SizeFuncFunctor)(particle);
// Tesselate
auto numParticleVertices = (this->*m_TesselateFunctor)(particle, pVertices, vtx, vScale);
vtx += numParticleVertices;
particle->Life -= g_fDeltaTime;
if(particle->Life < 0.0f)
m_Pool.Free(particle);
}
pVB->SetNumVertices(vtx);
pVB->SetDirty(true);
}
//! called during the update of the entity
void ParticleGenerator::Update()
{
// generate new particles
if(m_bActive)
{
m_fNewParticlesCounter += g_fDeltaTime * m_ParticlesPerSecond;
u32 numNewParticles = u32(m_fNewParticlesCounter);
if(m_aParticles.size() + numNewParticles > m_MaxParticles)
{
numNewParticles = m_MaxParticles-m_aParticles.size();
}
for(u32 i=0; i<numNewParticles; ++i)
{
if(Particle* pParticle = m_Pool->Alloc<Particle>())
{
pParticle->InitialLife = Random::GetFloat(m_rParticleLife.Min, m_rParticleLife.Max);
pParticle->Life = pParticle->InitialLife;
pParticle->Position = Vector3::Create(Random::GetFloat(m_EmitBox.Min().X, m_EmitBox.Max().X),
Random::GetFloat(m_EmitBox.Min().Y, m_EmitBox.Max().Y),
Random::GetFloat(m_EmitBox.Min().Z, m_EmitBox.Max().Z));
Vector3 vCenter = m_EmitBox.Min()+m_EmitBox.Size()/2.0f;
if(!m_bApplyWorldTransform)
{
Vector3 vTranslation = GetTransformationMatrix().GetTranslation();
pParticle->Position += vTranslation;
vCenter += vTranslation;
}
if(m_bExplosive)
{
pParticle->Speed = (pParticle->Position-vCenter).Normalize();
pParticle->Speed *= Random::GetFloat(m_rParticleInitialSpeed.Min, m_rParticleInitialSpeed.Max);
}
else
{
pParticle->Speed = Vector3::Create(m_vDirection.X * Random::GetFloat(m_rParticleInitialSpeed.Min, m_rParticleInitialSpeed.Max),
m_vDirection.Y * Random::GetFloat(m_rParticleInitialSpeed.Min, m_rParticleInitialSpeed.Max),
m_vDirection.Z * Random::GetFloat(m_rParticleInitialSpeed.Min, m_rParticleInitialSpeed.Max));
}
pParticle->Alpha = 1.0f;
m_aParticles.push_back(pParticle);
}
}
m_fNewParticlesCounter -= numNewParticles;
if(m_fActiveTime >= 0.0f)
{
m_fActiveTime -= g_fDeltaTime;
if(m_fActiveTime < 0.0f)
{
m_bActive = false;
}
}
}
// update particles
GraphicComponent* pGraphic = GetComponent<GraphicComponent>();
VertexBuffer* pVertexBuffer = pGraphic->GetVertexBuffer();
Material* pMaterial = pGraphic->GetMaterial();
const Matrix44& viewInverse = EntityRenderer::Instance()->Get3DCamera()->GetViewMatrixInverse();
const f32 fHalfSize = m_fParticleSize/2.0f;
const bool bPointSprite = GraphicExtensionHandler::Instance()->HasExtension(GraphicExtensionHandler::E_PointSprite);
u32 vtx = 0;
for(std::list<Particle*>::iterator it = m_aParticles.begin(); it != m_aParticles.end(); )
{
if((*it)->Life > 0.0f)
{
(*it)->Position += (*it)->Speed * g_fDeltaTime;
(*it)->Speed += m_vGravity * g_fDeltaTime;
(*it)->Alpha = (*it)->Life / (*it)->InitialLife;
(*it)->Life -= g_fDeltaTime;
const Color& color = pMaterial->GetColor();
Vertex3D* pVertices = pVertexBuffer->GetVertices();
const Vector3& pos = (*it)->Position;
if(bPointSprite)
{
pVertices[vtx].Pos = pos;
pVertices[vtx].color = Color(color.R, color.G, color.B, (*it)->Alpha);
++vtx;
}
else
{
Vector3 vScale = GetAbsoluteScale();
pVertices[vtx+0].UV = Vector2(0.0f, 1.0f); pVertices[vtx+0].Pos = Vector3::Create(-fHalfSize, -fHalfSize, 0.0f)*vScale;
pVertices[vtx+1].UV = Vector2(0.0f, 0.0f); pVertices[vtx+1].Pos = Vector3::Create(-fHalfSize, fHalfSize, 0.0f)*vScale;
pVertices[vtx+2].UV = Vector2(1.0f, 0.0f); pVertices[vtx+2].Pos = Vector3::Create(fHalfSize, fHalfSize, 0.0f)*vScale;
pVertices[vtx+3].UV = Vector2(0.0f, 1.0f); pVertices[vtx+3].Pos = Vector3::Create(-fHalfSize, -fHalfSize, 0.0f)*vScale;
pVertices[vtx+4].UV = Vector2(1.0f, 0.0f); pVertices[vtx+4].Pos = Vector3::Create(fHalfSize, fHalfSize, 0.0f)*vScale;
pVertices[vtx+5].UV = Vector2(1.0f, 1.0f); pVertices[vtx+5].Pos = Vector3::Create(fHalfSize, -fHalfSize, 0.0f)*vScale;
Matrix44 transform = viewInverse;
transform.SetTranslation(super::GetTransformationMatrix().TransformVect(pos));
for(u32 i=0; i<6; ++i)
{
pVertices[vtx+i].Pos = transform.TransformVect(pVertices[vtx+i].Pos);
pVertices[vtx+i].color = Color(color.R, color.G, color.B, (*it)->Alpha);
}
vtx += 6;
}
++it;
}
else
{
// remove particle
m_Pool->Free((*it));
it = m_aParticles.erase(it);
}
}
pVertexBuffer->SetNumVertices(vtx);
pVertexBuffer->SetDirty(true);
}
