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Code Issues 152 Wiki Activity

Let the smoke leave the exhaust as a widening jet that fades in

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This commit is contained in:
Hirek
2026-10-20 18:00:51 +02:00
parent abbdca4773
commit cf36b24e8d
8 changed files with 42 additions and 6 deletions
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12
rendering/particles.cpp
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@@ -122,6 +122,12 @@ smoke_source::deserialize_mapping( cParser &Input ) {
else if( key == "drag:" ) {
m_drag = std::max( 0.f, Input.getToken<float>( true, "\n\r\t ,;[]" ) );
}
else if( key == "spread:" ) {
m_spread = std::max( 0.f, Input.getToken<float>( true, "\n\r\t ,;[]" ) );
}
else if( key == "fade_in:" ) {
m_fadein = std::max( 0.f, Input.getToken<float>( true, "\n\r\t ,;[]" ) );
}
return true; // return value marks a [ key: value ] pair was extracted, nothing about whether it's recognized
}
@@ -385,6 +391,10 @@ smoke_source::update( smoke_particle &Particle, bounding_box &Boundingbox, doubl
if( Particle.opacity <= 0.f ) { return false; }
// ... otherwise proceed with full update
m_sizemodifier.update( Particle.size, Timedelta );
if( m_spread > 0.f ) {
// the jet widens with the way it goes
Particle.size = std::min( Particle.size + m_spread * glm::length( Particle.velocity ) * static_cast<float>( Timedelta ), m_sizemodifier.limit( value_limit::max ) );
}
if( m_settles ) {
// the drag of the air takes the particle towards the velocity it settles at
@@ -463,6 +473,8 @@ smoke_source::update_gpu( double const Timedelta, bool const Onlydespawn ) {
m_gpu.damping = static_cast<float>( 0.050 * Global.Overcast );
m_gpu.risemin = static_cast<float>( 0.25 * ( 2.f - Global.Overcast ) );
}
m_gpu.spread = m_spread;
m_gpu.fadein = m_fadein;
m_gpu.settles = m_settles;
m_gpu.settling = m_settling;
m_gpu.drag = m_drag;