/*
* Copyright (c) 2016-2019 Irlan Robson https://irlanrobson.github.io
*
* 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 Test
{
public:
	TableCloth() : m_rectangleGarment(5.0f, 5.0f)
	{
		// Generate 2D mesh
		m_rectangleGarmentMesh.Set(&m_rectangleGarment, 1.0f);

		// Create 3D mesh
		m_rectangleClothMesh.Set(&m_rectangleGarmentMesh);

		// Rotate the mesh
		b3Mat33 rotation = b3Mat33RotationX(0.5f * B3_PI);
		for (u32 i = 0; i < m_rectangleClothMesh.vertexCount; ++i)
		{
			m_rectangleClothMesh.vertices[i] = rotation * m_rectangleClothMesh.vertices[i];
			m_rectangleClothMesh.vertices[i].y += 5.0f;
		}
		
		// Create cloth
		b3ClothDef def;
		def.mesh = &m_rectangleClothMesh;
		def.density = 0.2f;
		def.bending = 10000.0f;
		def.structural = 10000.0f;
		def.damping = 0.0f;

		m_cloth = new b3Cloth(def);

		m_cloth->SetGravity(b3Vec3(0.0f, -9.8f, 0.0f));
		m_cloth->SetWorld(&m_world);

		for (b3Particle* p = m_cloth->GetParticleList().m_head; p; p = p->GetNext())
		{
			p->SetRadius(0.2f);
			p->SetFriction(0.2f);
		}

		{
			b3BodyDef bd;
			bd.type = e_staticBody;

			b3Body* b = m_world.CreateBody(bd);

			m_tableHull.SetAsCylinder(5.0f, 2.0f);

			b3HullShape tableShape;
			tableShape.m_hull = &m_tableHull;
			tableShape.m_radius = 0.2f;

			b3ShapeDef sd;
			sd.shape = &tableShape;
			sd.friction = 1.0f;

			b->CreateShape(sd);
		}

		m_clothDragger = new b3ClothDragger(&m_ray, m_cloth);
	}

	~TableCloth()
	{
		delete m_clothDragger;
		delete m_cloth;
	}

	void Step()
	{
		Test::Step();

		m_cloth->Step(g_testSettings->inv_hertz);

		m_cloth->Draw();

		if (m_clothDragger->IsDragging())
		{
			b3Vec3 pA = m_clothDragger->GetPointA();
			b3Vec3 pB = m_clothDragger->GetPointB();

			g_draw->DrawPoint(pA, 2.0f, b3Color_green);

			g_draw->DrawPoint(pB, 2.0f, b3Color_green);

			g_draw->DrawSegment(pA, pB, b3Color_white);
		}

		extern u32 b3_clothSolverIterations;
		g_draw->DrawString(b3Color_white, "Iterations = %d", b3_clothSolverIterations);

		float32 E = m_cloth->GetEnergy();
		g_draw->DrawString(b3Color_white, "E = %f", E);
	}

	void MouseMove(const b3Ray3& pw)
	{
		Test::MouseMove(pw);

		if (m_clothDragger->IsDragging() == true)
		{
			m_clothDragger->Drag();
		}
	}

	void MouseLeftDown(const b3Ray3& pw)
	{
		Test::MouseLeftDown(pw);

		if (m_clothDragger->IsDragging() == false)
		{
			m_clothDragger->StartDragging();
		}
	}

	void MouseLeftUp(const b3Ray3& pw)
	{
		Test::MouseLeftUp(pw);

		if (m_clothDragger->IsDragging() == true)
		{
			m_clothDragger->StopDragging();
		}
	}

	static Test* Create()
	{
		return new TableCloth();
	}

	b3RectangleGarment m_rectangleGarment;
	b3GarmentMesh m_rectangleGarmentMesh;
	b3GarmentClothMesh m_rectangleClothMesh;
	
	b3Cloth* m_cloth;
	b3ClothDragger* m_clothDragger;

	b3QHull m_tableHull;
};

#endif