// * This file is part of the COLOBOT source code
// * Copyright (C) 2001-2008, Daniel ROUX & EPSITEC SA, www.epsitec.ch
// *
// * This program is free software: you can redistribute it and/or modify
// * it under the terms of the GNU General Public License as published by
// * the Free Software Foundation, either version 3 of the License, or
// * (at your option) any later version.
// *
// * This program is distributed in the hope that it will be useful,
// * but WITHOUT ANY WARRANTY; without even the implied warranty of
// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// * GNU General Public License for more details.
// *
// * You should have received a copy of the GNU General Public License
// * along with this program. If not, see  http://www.gnu.org/licenses/.


#include <windows.h>
#include <stdio.h>
#include <d3d.h>

#include "common/struct.h"
#include "math/geometry.h"
#include "graphics/d3d/d3dengine.h"
#include "math/old/math3d.h"
#include "common/event.h"
#include "common/misc.h"
#include "common/iman.h"
#include "ui/compass.h"




// Object's constructor.

CCompass::CCompass(CInstanceManager* iMan) : CControl(iMan)
{
	m_dir = 0.0f;
}

// Object's destructor.

CCompass::~CCompass()
{
}


// Creates a new button.

bool CCompass::Create(Math::Point pos, Math::Point dim, int icon, EventMsg eventMsg)
{
	if ( eventMsg == EVENT_NULL )  eventMsg = GetUniqueEventMsg();

	CControl::Create(pos, dim, icon, eventMsg);
	return true;
}


// Management of an event.

bool CCompass::EventProcess(const Event &event)
{
	CControl::EventProcess(event);

	if ( event.event == EVENT_LBUTTONDOWN )
	{
		if ( CControl::Detect(event.pos) )
		{
			Event newEvent = event;
			newEvent.event = m_eventMsg;
			m_event->AddEvent(newEvent);
			return false;
		}
	}

	return true;
}


// Draw button.

void CCompass::Draw()
{
	LPDIRECT3DDEVICE7 device;
	D3DVERTEX2		vertex[4];	// 2 triangles
	Math::Point			p1, p2, p3, c, uv1, uv2;
	D3DVECTOR		n;
	float			dp;

	if ( (m_state & STATE_VISIBLE) == 0 )  return;

	device = m_engine->RetD3DDevice();

	m_engine->SetTexture("button2.tga");
	m_engine->SetState(D3DSTATENORMAL);

	p1.x = m_pos.x;
	p1.y = m_pos.y;
	p2.x = m_pos.x + m_dim.x;
	p2.y = m_pos.y + m_dim.y;

	c.x = (p1.x+p2.x)/2.0f;
	c.y = (p1.y+p2.y)/2.0f;  // center

	uv1.x = 64.0f/256.0f;
	uv1.y = 32.0f/256.0f;
	uv2.x = 96.0f/256.0f;
	uv2.y = 64.0f/256.0f;

	dp = 0.5f/256.0f;
	uv1.x += dp;
	uv1.y += dp;
	uv2.x -= dp;
	uv2.y -= dp;

	n = D3DVECTOR(0.0f, 0.0f, -1.0f);  // normal

	vertex[0] = D3DVERTEX2(D3DVECTOR(p1.x, p1.y, 0.0f), n, uv1.x,uv2.y);
	vertex[1] = D3DVERTEX2(D3DVECTOR(p1.x, p2.y, 0.0f), n, uv1.x,uv1.y);
	vertex[2] = D3DVERTEX2(D3DVECTOR(p2.x, p1.y, 0.0f), n, uv2.x,uv2.y);
	vertex[3] = D3DVERTEX2(D3DVECTOR(p2.x, p2.y, 0.0f), n, uv2.x,uv1.y);

	device->DrawPrimitive(D3DPT_TRIANGLESTRIP, D3DFVF_VERTEX2, vertex, 4, NULL);
	m_engine->AddStatisticTriangle(2);

	if ( m_state & STATE_ENABLE )
	{
		p1.x = c.x;
		p1.y = c.y+m_dim.x*0.40f;
		p1 = Math::RotatePoint(c, m_dir, p1);
		p1.x = c.x+(p1.x-c.x)*(m_dim.x/m_dim.y);

		p2.x = c.x+m_dim.x*0.20f;
		p2.y = c.y-m_dim.x*0.40f;
		p2 = Math::RotatePoint(c, m_dir, p2);
		p2.x = c.x+(p2.x-c.x)*(m_dim.x/m_dim.y);

		p3.x = c.x-m_dim.x*0.20f;
		p3.y = c.y-m_dim.x*0.40f;
		p3 = Math::RotatePoint(c, m_dir, p3);
		p3.x = c.x+(p3.x-c.x)*(m_dim.x/m_dim.y);

		uv1.x =  96.0f/256.0f;
		uv1.y =  32.0f/256.0f;
		uv2.x = 104.0f/256.0f;
		uv2.y =  64.0f/256.0f;

		uv1.x += dp;
		uv1.y += dp;
		uv2.x -= dp;
		uv2.y -= dp;

		vertex[0] = D3DVERTEX2(D3DVECTOR(p1.x, p1.y, 0.0f), n, uv1.x,uv1.y);
		vertex[1] = D3DVERTEX2(D3DVECTOR(p2.x, p2.y, 0.0f), n, uv1.x,uv2.y);
		vertex[2] = D3DVERTEX2(D3DVECTOR(p3.x, p3.y, 0.0f), n, uv2.x,uv2.y);

		device->DrawPrimitive(D3DPT_TRIANGLELIST, D3DFVF_VERTEX2, vertex, 3, NULL);
		m_engine->AddStatisticTriangle(1);
	}
}


// Management directions of the compass.

void CCompass::SetDirection(float dir)
{
	m_dir = dir;
}

float CCompass::RetDirection()
{
	return m_dir;
}