// SPDX-FileCopyrightText: 2025 Erin Catto

// SPDX-FileCopyrightText: 2025 Ikpil Choi(ikpil@naver.com)

// SPDX-License-Identifier: MIT

using static Box2D.NET.B2Ids;

using static Box2D.NET.B2Geometries;

using static Box2D.NET.B2Types;

using static Box2D.NET.B2Bodies;

using static Box2D.NET.B2Shapes;

namespace Box2D.NET.Samples.Samples.Stackings;

public class TiltedStack : Sample

{

private static readonly int SampleTiltedStack = SampleFactory.Shared.RegisterSample("Stacking", "Tilted Stack", Create);

public const int m_columns = 10;

public const int m_rows = 10;

private B2BodyId[] m_bodies = new B2BodyId[m_rows * m_columns];

private static Sample Create(SampleContext context)

{

return new TiltedStack(context);

}

public TiltedStack(SampleContext context) : base(context)

{

if (m_context.restart == false)

{

m_camera.center = new B2Vec2(7.5f, 7.5f);

m_camera.zoom = 20.0f;

}

{

B2BodyDef bodyDef = b2DefaultBodyDef();

bodyDef.position = new B2Vec2(0.0f, -1.0f);

B2BodyId groundId = b2CreateBody(m_worldId, bodyDef);

B2Polygon box = b2MakeBox(1000.0f, 1.0f);

B2ShapeDef shapeDef = b2DefaultShapeDef();

b2CreatePolygonShape(groundId, shapeDef, box);

}

for (int i = 0; i < m_rows * m_columns; ++i)

{

m_bodies[i] = b2_nullBodyId;

}

{

B2Polygon box = b2MakeRoundedBox(0.45f, 0.45f, 0.05f);

B2ShapeDef shapeDef = b2DefaultShapeDef();

shapeDef.density = 1.0f;

shapeDef.material.friction = 0.3f;

float offset = 0.2f;

float dx = 5.0f;

float xroot = -0.5f * dx * (m_columns - 1.0f);

for (int j = 0; j < m_columns; ++j)

{

float x = xroot + j * dx;

for (int i = 0; i < m_rows; ++i)

{

B2BodyDef bodyDef = b2DefaultBodyDef();

bodyDef.type = B2BodyType.b2_dynamicBody;

int n = j * m_rows + i;

bodyDef.position = new B2Vec2(x + offset * i, 0.5f + 1.0f * i);

B2BodyId bodyId = b2CreateBody(m_worldId, bodyDef);

m_bodies[n] = bodyId;

b2CreatePolygonShape(bodyId, shapeDef, box);

}

}

}

}

}