From 0348d55d21db474f6afc58774b7e7f5f49364f96 Mon Sep 17 00:00:00 2001
From: Irlan <->
Date: Wed, 30 May 2018 15:29:45 -0300
Subject: [PATCH] allow direct particle position alteration in order for mouse
 spring work

---
 examples/testbed/tests/cloth_test.h      |  2 +-
 include/bounce/dynamics/cloth/particle.h | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/examples/testbed/tests/cloth_test.h b/examples/testbed/tests/cloth_test.h
index 885ed47..d514418 100644
--- a/examples/testbed/tests/cloth_test.h
+++ b/examples/testbed/tests/cloth_test.h
@@ -168,7 +168,7 @@ public:
 
 		if (m_spring)
 		{
-			m_particle->ApplyTranslation(dx);
+			m_particle->SetPosition(B);
 		}
 		else
 		{
diff --git a/include/bounce/dynamics/cloth/particle.h b/include/bounce/dynamics/cloth/particle.h
index fce588e..f8a3f40 100644
--- a/include/bounce/dynamics/cloth/particle.h
+++ b/include/bounce/dynamics/cloth/particle.h
@@ -81,6 +81,11 @@ public:
 	// Get the vertex index.
 	u32 GetVertex() const;
 
+	// Set the particle position. 
+	// If the particle is dynamic changing the position directly might lead 
+	// to physically incorrect simulation behaviour.
+	void SetPosition(const b3Vec3& position);
+
 	// Get the particle position.
 	const b3Vec3& GetPosition() const;
 
@@ -175,6 +180,12 @@ inline u32 b3Particle::GetVertex() const
 	return m_vertex;
 }
 
+inline void b3Particle::SetPosition(const b3Vec3& position)
+{
+	m_position = position;
+	m_translation.SetZero();
+}
+
 inline const b3Vec3& b3Particle::GetPosition() const
 {
 	return m_position;