first commit

[blok] / Box2D / Source / Dynamics / b2WorldCallbacks.cpp

diff --git a/Box2D/Source/Dynamics/b2WorldCallbacks.cpp b/Box2D/Source/Dynamics/b2WorldCallbacks.cpp
new file mode 100644 (file)
index 0000000..b060a28
--- /dev/null
+++ b/Box2D/Source/Dynamics/b2WorldCallbacks.cpp
@@ -0,0 +1,63 @@
+/*
+* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
+*
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 1. The origin of this software must not be misrepresented; you must not
+* claim that you wrote the original software. If you use this software
+* in a product, an acknowledgment in the product documentation would be
+* appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+* misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "b2WorldCallbacks.h"
+#include "../Collision/Shapes/b2Shape.h"
+
+b2ContactFilter b2_defaultFilter;
+
+// Return true if contact calculations should be performed between these two shapes.
+// If you implement your own collision filter you may want to build from this implementation.
+bool b2ContactFilter::ShouldCollide(b2Shape* shape1, b2Shape* shape2)
+{
+       const b2FilterData& filter1 = shape1->GetFilterData();
+       const b2FilterData& filter2 = shape2->GetFilterData();
+
+       if (filter1.groupIndex == filter2.groupIndex && filter1.groupIndex != 0)
+       {
+               return filter1.groupIndex > 0;
+       }
+
+       bool collide = (filter1.maskBits & filter2.categoryBits) != 0 && (filter1.categoryBits & filter2.maskBits) != 0;
+       return collide;
+}
+
+b2DebugDraw::b2DebugDraw()
+{
+       m_drawFlags = 0;
+}
+
+void b2DebugDraw::SetFlags(uint32 flags)
+{
+       m_drawFlags = flags;
+}
+
+uint32 b2DebugDraw::GetFlags() const
+{
+       return m_drawFlags;
+}
+
+void b2DebugDraw::AppendFlags(uint32 flags)
+{
+       m_drawFlags |= flags;
+}
+
+void b2DebugDraw::ClearFlags(uint32 flags)
+{
+       m_drawFlags &= ~flags;
+}