more tests

examples/testbed/tests/hull_collision.h

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+/*
+* 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 HULL_COLLISION_H
+#define HULL_COLLISION_H
+
+class HullCollision : public Collide
+{
+public:
+	enum
+	{
+		// Half to avoid generation failure due to many vertices
+		e_count = B3_MAX_HULL_VERTICES / 2
+	};
+
+	HullCollision()
+	{
+		m_xfA.position.Set(0.0f, 1.5f, 0.0f);
+		m_xfA.rotation.SetIdentity();
+
+		m_xfB.SetIdentity();
+
+		m_cache.count = 0;
+
+		Generate();
+	}
+
+	void KeyDown(int button)
+	{
+		if (button == GLFW_KEY_G)
+		{
+			Generate();
+		}
+		
+		Collide::KeyDown(button);
+	}
+
+	void Generate()
+	{
+		for (u32 i = 0; i < e_count; ++i)
+		{
+			float32 x = RandomFloat(-1.0f, 1.0f);
+			float32 y = RandomFloat(-1.0f, 1.0f);
+			float32 z = RandomFloat(-1.0f, 1.0f);
+
+			// Clamp to force coplanarities.
+			// This will stress the convex hull creation code.
+			x = b3Clamp(x, -0.9f, 0.9f);
+			y = b3Clamp(y, -0.9f, 0.9f);
+			z = b3Clamp(z, -0.9f, 0.9f);
+
+			b3Vec3 p(x, y, z);
+
+			m_points1[i] = p;
+		}
+
+		for (u32 i = 0; i < e_count; ++i)
+		{
+			float32 x = RandomFloat(-1.0f, 1.0f);
+			float32 y = RandomFloat(-1.0f, 1.0f);
+			float32 z = RandomFloat(-1.0f, 1.0f);
+
+			// Clamp to force coplanarities.
+			// This will stress the convex hull creation code.
+			x = b3Clamp(x, -0.9f, 0.9f);
+			y = b3Clamp(y, -0.9f, 0.9f);
+			z = b3Clamp(z, -0.9f, 0.9f);
+
+			b3Vec3 p(x, y, z);
+
+			m_points2[i] = p;
+		}
+	}
+	
+	void Step()
+	{
+		b3QHull hull1;
+		hull1.Set(m_points1, e_count);
+
+		b3HullShape sA;
+		sA.m_hull = &hull1;
+		m_shapeA = &sA;
+
+		b3QHull hull2;
+		hull2.Set(m_points2, e_count);
+
+		b3HullShape sB;
+		sB.m_hull = &hull2;
+		m_shapeB = &sB;
+
+		g_draw->DrawString(b3Color_white, "G - Generate a random convex hull pair");
+		
+		Collide::Step();
+	}
+
+	static Test* Create()
+	{
+		return new HullCollision();
+	}
+
+	b3Vec3 m_points1[e_count];
+	b3Vec3 m_points2[e_count];
+};
+
+#endif