update tests

Allow dragging a spring cloth in all spring cloth tests related to the spring cloth

Use gravity acceleration in Earth in all spring cloth tests

examples/testbed/tests/spring_cloth.h

@@ -0,0 +1,61 @@
+/*
+* Copyright (c) 2016-2016 Irlan Robson http://www.irlan.net
+*
+* 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.
+*/
+
+#ifndef SPRING_CLOTH_H
+#define SPRING_CLOTH_H
+
+extern DebugDraw* g_debugDraw;
+extern Camera g_camera;
+extern Settings g_settings;
+
+class SpringCloth : public SpringClothTest
+{
+public:
+	SpringCloth() 
+	{
+		b3SpringClothDef def;
+		def.allocator = &m_clothAllocator;
+		def.mesh = &m_clothMesh;
+		def.density = 0.2f;
+		def.ks = 100000.0f;
+		def.gravity.Set(0.0f, -10.0f, 0.0f);
+
+		m_cloth.Initialize(def);
+
+		b3AABB3 aabb;
+		aabb.m_lower.Set(-5.0f, -1.0f, -6.0f);
+		aabb.m_upper.Set(5.0f, 1.0f, -4.0f);
+
+		for (u32 i = 0; i < def.mesh->vertexCount; ++i)
+		{
+			if (aabb.Contains(def.mesh->vertices[i]))
+			{
+				m_cloth.SetType(i, b3MassType::e_staticMass);
+			}
+		}		
+	}
+
+	static Test* Create()
+	{
+		return new SpringCloth();
+	}
+
+	b3GridMesh<10, 10> m_clothMesh;
+};
+
+#endif