1 files changed, 81 insertions, 0 deletions
diff --git a/demo/scenes/triggervolume.h b/demo/scenes/triggervolume.h
new file mode 100644
index 0000000..0e4c1a4
--- /dev/null
+++ b/demo/scenes/triggervolume.h
@@ -0,0 +1,81 @@
+
+
+
+class TriggerVolume : public Scene
+{
+public:
+
+	TriggerVolume(const char* name) : Scene(name) {}
+
+	void Initialize()
+	{
+		float radius = 0.05f;
+		CreateParticleGrid(Vec3(1.75, 2.0, -0.25), 10, 5, 10, radius, Vec3(0.0f), 1.0f, false, 0.0f, NvFlexMakePhase(0, eNvFlexPhaseSelfCollide), 0.0f);
+
+		g_numExtraParticles = 10000;
+
+		// regular box
+		AddBox(Vec3(0.5), Vec3(0.0, 0.5, 0.0));
+
+		// trigger box
+		AddBox(Vec3(0.5), Vec3(2.0f, 0.5, 0.0));
+		g_buffers->shapeFlags[1] |= eNvFlexShapeFlagTrigger;
+
+		g_params.radius = radius;
+		g_params.dynamicFriction = 0.025f;
+		g_params.dissipation = 0.0f;
+		g_params.restitution = 0.0;
+		g_params.numIterations = 4;
+		g_params.particleCollisionMargin = g_params.radius*0.05f;
+
+		g_numSubsteps = 1;
+
+		// draw options		
+		g_drawPoints = true;
+
+		g_emitters[0].mEnabled = true;
+	}
+
+	virtual void Update()
+	{
+		const int maxContactsPerParticle = 6;
+
+		NvFlexVector<Vec4> contactPlanes(g_flexLib,g_buffers->positions.size()*maxContactsPerParticle);
+		NvFlexVector<Vec4> contactVelocities(g_flexLib, g_buffers->positions.size()*maxContactsPerParticle);
+		NvFlexVector<int> contactIndices(g_flexLib, g_buffers->positions.size());
+		NvFlexVector<unsigned int> contactCounts(g_flexLib, g_buffers->positions.size());
+
+		NvFlexGetContacts(g_flex, contactPlanes.buffer, contactVelocities.buffer, contactIndices.buffer, contactCounts.buffer);
+
+		contactPlanes.map();
+		contactVelocities.map();
+		contactIndices.map();
+		contactCounts.map();
+
+		int activeCount = NvFlexGetActiveCount(g_flex);
+
+		for (int i = 0; i < activeCount; ++i)
+		{
+			const int contactIndex = contactIndices[i];
+			const unsigned int count = contactCounts[contactIndex];
+
+			for (unsigned int c = 0; c < count; ++c)
+			{
+				Vec4 velocity = contactVelocities[contactIndex*maxContactsPerParticle + c];
+
+				const int shapeId = int(velocity.w);
+
+				// detect when particle intersects the trigger 
+				// volume and teleport it over to the other box
+				if (shapeId == 1)
+				{
+					Vec3 pos = Vec3(Randf(-0.5f, 0.5f), 1.0f, Randf(-0.5f, 0.5f));
+
+					g_buffers->positions[i] = Vec4(pos, 1.0f);
+					g_buffers->velocities[i] = 0.0f;
+				}
+			}
+		}
+	}
+
+};
+\ No newline at end of file