add a small framework of garments, update the related tests

examples/testbed/tests/table_cloth.h

@@ -0,0 +1,85 @@
+/*
+* 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 TABLE_CLOTH_H
+#define TABLE_CLOTH_H
+
+class TableCloth : public SpringClothTest
+{
+public:
+	TableCloth()
+	{
+		// Shift vertices up
+		for (u32 i = 0; i < m_gridMesh.vertexCount; ++i)
+		{
+			m_gridMesh.vertices[i].y = 5.0f;
+		}
+
+		m_gridClothMesh.vertexCount = m_gridMesh.vertexCount;
+		m_gridClothMesh.vertices = m_gridMesh.vertices;
+		
+		m_gridClothMesh.triangleCount = m_gridMesh.triangleCount;
+		m_gridClothMesh.triangles = (b3ClothMeshTriangle*)m_gridMesh.triangles;
+
+		m_gridClothMeshMesh.vertexCount = m_gridClothMesh.vertexCount;
+		m_gridClothMeshMesh.startVertex = 0;
+		
+		m_gridClothMeshMesh.triangleCount = m_gridClothMesh.triangleCount;
+		m_gridClothMeshMesh.startTriangle = 0;
+
+		m_gridClothMesh.meshCount = 1;
+		m_gridClothMesh.meshes = &m_gridClothMeshMesh;
+
+		m_gridClothMesh.sewingLineCount = 0;
+		m_gridClothMesh.sewingLines = nullptr;
+
+		b3SpringClothDef def;
+		def.allocator = &m_clothAllocator;
+		def.mesh = &m_gridClothMesh;
+		def.density = 0.2f;
+		def.ks = 10000.0f;
+		def.kd = 0.0f;
+		def.r = 0.05f;
+		def.gravity.Set(0.0f, -10.0f, 0.0f);
+
+		m_cloth.Initialize(def);
+
+		m_tableHull.SetAsCylinder(5.0f, 2.0f);
+
+		m_tableShape.m_hull = &m_tableHull;
+		m_tableShape.m_radius = 0.2f;
+
+		m_tableShape.SetFriction(1.0f);
+
+		m_cloth.AddShape(&m_tableShape);
+	}
+
+	static Test* Create()
+	{
+		return new TableCloth();
+	}
+
+	b3GridMesh<10, 10> m_gridMesh;
+	b3ClothMeshMesh m_gridClothMeshMesh;
+	b3ClothMesh m_gridClothMesh;
+	
+	b3QHull m_tableHull;
+	b3HullShape m_tableShape;
+};
+
+#endif