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Improve debug rendering for trigger volumes #114

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3ab6110
Improve trigger volume debug rendering: solid fill + state label
ccp-zoetrope Oct 1, 2026
5bce56d
Merge branch 'main' into trigger-volume-fill
ccp-zoetrope Oct 5, 2026
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4 changes: 4 additions & 0 deletions trinity/Eve/EveTriggerVolume.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -242,6 +242,10 @@ void EveTriggerVolume::RenderDebugInfo( ITr2DebugRenderer2& renderer )
{
volume->RenderDebugInfo( renderer, m_worldTransform, color );
}

// the volume edges are hard to read from inside, so label the volume with the trigger state
const Vector3 center = Transform( m_boundingSphere.center, m_worldTransform ).GetXYZ();
renderer.DrawText( TRI_DBG_FONT_MEDIUM, center, color, "%s: %s (%.2f)", m_name.c_str(), m_isInside ? "INSIDE" : "outside", m_currentIntensity );
}

if( renderer.HasOption( GetRawRoot(), "Trigger Exclusion Volumes" ) )
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8 changes: 6 additions & 2 deletions trinity/Eve/Volume/EveBoxVolume.cpp
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Expand Up @@ -40,8 +40,12 @@ bool EveBoxVolume::Initialize()

void EveBoxVolume::RenderDebugInfo( ITr2DebugRenderer2& renderer, const Matrix& parentTransform, const Color& baseColor )
{
renderer.DrawBox( this, m_boxTransform * parentTransform, MIN_AABB, MAX_AABB, Tr2DebugRenderer::Wireframe, baseColor * 0.5f );
renderer.DrawBox( this, m_innerBoxTransform * parentTransform, MIN_AABB, MAX_AABB, Tr2DebugRenderer::Wireframe, baseColor * 0.6f );
const Matrix boxTransform = m_boxTransform * parentTransform;
const Tr2DebugColor fill = EveVolumeFillColor( baseColor );
renderer.DrawBox( this, boxTransform, MIN_AABB, MAX_AABB, Tr2DebugRenderer::Solid, fill );
renderer.DrawBox( this, EveVolumeInsideOut( boxTransform ), MIN_AABB, MAX_AABB, Tr2DebugRenderer::Solid, fill );
renderer.DrawBox( this, boxTransform, MIN_AABB, MAX_AABB, Tr2DebugRenderer::Wireframe, EveVolumeDebugColor( baseColor * 0.5f ) );
renderer.DrawBox( this, m_innerBoxTransform * parentTransform, MIN_AABB, MAX_AABB, Tr2DebugRenderer::Wireframe, EveVolumeDebugColor( baseColor * 0.6f ) );

if( m_debugShowIntersection )
{
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9 changes: 6 additions & 3 deletions trinity/Eve/Volume/EveEllipsoidVolume.cpp
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Expand Up @@ -56,11 +56,14 @@ void EveEllipsoidVolume::Setup()

void EveEllipsoidVolume::RenderDebugInfo( ITr2DebugRenderer2& renderer, const Matrix& parentTransform, const Color& baseColor )
{
Matrix outerTransform = TransformationMatrix( m_shape, m_rotation, m_position ) * parentTransform;
renderer.DrawSphere( Tr2DebugObjectReference( this, 200 ), outerTransform, 20, Tr2DebugRenderer::Wireframe, baseColor * 0.5f );
const Matrix outerTransform = TransformationMatrix( m_shape, m_rotation, m_position ) * parentTransform;
const Tr2DebugColor fill = EveVolumeFillColor( baseColor );
renderer.DrawSphere( Tr2DebugObjectReference( this, 200 ), outerTransform, 20, Tr2DebugRenderer::Solid, fill );
renderer.DrawSphere( Tr2DebugObjectReference( this, 200 ), EveVolumeInsideOut( outerTransform ), 20, Tr2DebugRenderer::Solid, fill );
renderer.DrawSphere( Tr2DebugObjectReference( this, 200 ), outerTransform, 20, Tr2DebugRenderer::Wireframe, EveVolumeDebugColor( baseColor * 0.5f ) );

Matrix innerTransform = TransformationMatrix( m_innerShape, m_rotation, m_position ) * parentTransform;
renderer.DrawSphere( Tr2DebugObjectReference( this, 200 ), innerTransform, 20, Tr2DebugRenderer::Wireframe, baseColor * 0.6f );
renderer.DrawSphere( Tr2DebugObjectReference( this, 200 ), innerTransform, 20, Tr2DebugRenderer::Wireframe, EveVolumeDebugColor( baseColor * 0.6f ) );

if( m_debugShowIntersection )
{
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8 changes: 6 additions & 2 deletions trinity/Eve/Volume/EveSphereVolume.cpp
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Expand Up @@ -19,8 +19,12 @@ EveSphereVolume::~EveSphereVolume()

void EveSphereVolume::RenderDebugInfo( ITr2DebugRenderer2& renderer, const Matrix& parentTransform, const Color& baseColor )
{
renderer.DrawSphere( this, TranslationMatrix( m_outerSphere.center ) * parentTransform, m_outerSphere.radius, 20, Tr2DebugRenderer::Wireframe, baseColor * 0.5f );
renderer.DrawSphere( this, TranslationMatrix( m_outerSphere.center + m_innerSphere.center ) * parentTransform, m_innerSphere.radius, 20, Tr2DebugRenderer::Wireframe, baseColor * 0.6f );
const Matrix outerTransform = TranslationMatrix( m_outerSphere.center ) * parentTransform;
const Tr2DebugColor fill = EveVolumeFillColor( baseColor );
renderer.DrawSphere( this, outerTransform, m_outerSphere.radius, 20, Tr2DebugRenderer::Solid, fill );
renderer.DrawSphere( this, EveVolumeInsideOut( outerTransform ), m_outerSphere.radius, 20, Tr2DebugRenderer::Solid, fill );
renderer.DrawSphere( this, outerTransform, m_outerSphere.radius, 20, Tr2DebugRenderer::Wireframe, EveVolumeDebugColor( baseColor * 0.5f ) );
renderer.DrawSphere( this, TranslationMatrix( m_outerSphere.center + m_innerSphere.center ) * parentTransform, m_innerSphere.radius, 20, Tr2DebugRenderer::Wireframe, EveVolumeDebugColor( baseColor * 0.6f ) );
}

const CcpMath::Sphere EveSphereVolume::GetBoundingSphere() const
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24 changes: 24 additions & 0 deletions trinity/Eve/Volume/IEveVolume.h
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Expand Up @@ -7,6 +7,30 @@

BLUE_DECLARE_INTERFACE( IEveVolume );

// Debug colors shared by the volume shapes. The outline stays faintly visible where the volume is hidden
// behind other geometry, and the fill is a faint tint that also carries through to whatever is inside it.
inline Tr2DebugColor EveVolumeDebugColor( const Color& color )
{
Color occluded = color;
occluded.a *= 0.25f;
return Tr2DebugColor( color, occluded );
}

inline Tr2DebugColor EveVolumeFillColor( const Color& color )
{
Color fill = color;
fill.a *= 0.15f;
return EveVolumeDebugColor( fill );
}

// The debug renderer culls back faces, so a solid shape is invisible from inside. Drawing it a second time
// with this transform mirrors it, which reverses the winding so the inner faces render as well: together the
// two draws are a two-sided solid.
inline Matrix EveVolumeInsideOut( const Matrix& transform )
{
return ScalingMatrix( -1.0f, 1.0f, 1.0f ) * transform;
}

BLUE_INTERFACE( IEveVolume ) :
public IRoot
{
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