disable sensors on disabled bodies

erincatto · Feb 6, 2025 · 6a70379 · 6a70379
1 parent 2cb6aea
commit 6a70379
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Showing 2 changed files with 39 additions and 4 deletions.
diff --git a/samples/sample_events.cpp b/samples/sample_events.cpp
@@ -400,7 +400,7 @@ class SensorBookend : public Sample
 
 	void UpdateUI() override
 	{
-		float height = 90.0f;
+		float height = 160.0f;
 		ImGui::SetNextWindowPos( ImVec2( 10.0f, g_camera.m_height - height - 50.0f ), ImGuiCond_Once );
 		ImGui::SetNextWindowSize( ImVec2( 140.0f, height ) );
 
@@ -421,6 +421,18 @@ class SensorBookend : public Sample
 				m_visitorBodyId = b2_nullBodyId;
 				m_visitorShapeId = b2_nullShapeId;
 			}
+			else
+			{
+				bool enabled = b2Body_IsEnabled( m_visitorBodyId );
+				if ( enabled == true && ImGui::Button( "disable visitor" ) )
+				{
+					b2Body_Disable( m_visitorBodyId );
+				}
+				else if ( enabled == false && ImGui::Button( "enable visitor" ) )
+				{
+					b2Body_Enable( m_visitorBodyId );
+				}
+			}
 		}
 
 		if ( B2_IS_NULL( m_sensorBodyId ) )
@@ -438,6 +450,18 @@ class SensorBookend : public Sample
 				m_sensorBodyId = b2_nullBodyId;
 				m_sensorShapeId = b2_nullShapeId;
 			}
+			else
+			{
+				bool enabled = b2Body_IsEnabled( m_sensorBodyId );
+				if ( enabled == true && ImGui::Button( "disable sensor" ) )
+				{
+					b2Body_Disable( m_sensorBodyId );
+				}
+				else if ( enabled == false && ImGui::Button( "enable sensor" ) )
+				{
+					b2Body_Enable( m_sensorBodyId );
+				}
+			}
 		}
 
 		ImGui::End();
@@ -1360,6 +1384,7 @@ class BodyMove : public Sample
 		for ( int32_t i = 0; i < 10 && m_count < e_count; ++i )
 		{
 			bodyDef.position = { x, y };
+			bodyDef.isBullet = (m_count % 12 == 0);
 			bodyDef.userData = m_bodyIds + m_count;
 			m_bodyIds[m_count] = b2CreateBody( m_worldId, &bodyDef );
 			m_sleeping[m_count] = false;
@@ -1466,8 +1491,8 @@ class BodyMove : public Sample
 		return new BodyMove( settings );
 	}
 
-	b2BodyId m_bodyIds[e_count];
-	bool m_sleeping[e_count];
+	b2BodyId m_bodyIds[e_count] = {};
+	bool m_sleeping[e_count] = {};
 	int m_count;
 	int m_sleepCount;
 	b2Vec2 m_explosionPosition;

diff --git a/src/sensor.c b/src/sensor.c
@@ -146,7 +146,17 @@ static void b2SensorTask( int startIndex, int endIndex, uint32_t threadIndex, vo
 		sensor->overlaps2 = temp;
 		b2ShapeRefArray_Clear( &sensor->overlaps2 );
 
-		b2Transform transform = b2GetBodyTransform( world, sensorShape->bodyId );
+		b2Body* body = b2BodyArray_Get( &world->bodies, sensorShape->bodyId );
+		if (body->setIndex == b2_disabledSet)
+		{
+			if (sensor->overlaps1.count != 0)
+			{
+				b2SetBit( &taskContext->eventBits, sensorIndex );
+			}
+			continue;
+		}
+
+		b2Transform transform = b2GetBodyTransformQuick( world, body );
 
 		struct b2SensorQueryContext queryContext = {
 			.world = world,