/*
   BobToolz plugin for GtkRadiant
   Copyright (C) 2001 Gordon Biggans

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   This library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

// BobView.cpp: implementation of the DVisDrawer class.
//
//////////////////////////////////////////////////////////////////////

#include "DVisDrawer.h"

#include "iglrender.h"
#include "math/matrix.h"

#include <list>
#include "str.h"

#include "DPoint.h"
#include "DWinding.h"

#include "misc.h"
#include "funchandlers.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

DVisDrawer::DVisDrawer(){
	m_list = NULL;

	constructShaders();
	GlobalShaderCache().attachRenderable( *this );
}

DVisDrawer::~DVisDrawer(){
	GlobalShaderCache().detachRenderable( *this );
	destroyShaders();

	g_VisView = NULL;
}

//////////////////////////////////////////////////////////////////////
// Implementation
//////////////////////////////////////////////////////////////////////
const char* g_state_solid = "$bobtoolz/visdrawer/solid";
const char* g_state_wireframe = "$bobtoolz/visdrawer/wireframe";

void DVisDrawer::constructShaders(){
	OpenGLState state;
	GlobalOpenGLStateLibrary().getDefaultState( state );
	state.m_state = RENDER_COLOURWRITE | RENDER_DEPTHWRITE | RENDER_COLOURCHANGE;
	state.m_linewidth = 1;

	GlobalOpenGLStateLibrary().insert( g_state_wireframe, state );

	GlobalOpenGLStateLibrary().getDefaultState( state );
	state.m_state = RENDER_FILL | RENDER_BLEND | RENDER_COLOURWRITE | RENDER_COLOURCHANGE | RENDER_SMOOTH | RENDER_DEPTHWRITE;

	GlobalOpenGLStateLibrary().insert( g_state_solid, state );

	m_shader_solid = GlobalShaderCache().capture( g_state_solid );
	m_shader_wireframe = GlobalShaderCache().capture( g_state_wireframe );
}

void DVisDrawer::destroyShaders(){
	GlobalShaderCache().release( g_state_solid );
	GlobalShaderCache().release( g_state_wireframe );
	GlobalOpenGLStateLibrary().erase( g_state_solid );
	GlobalOpenGLStateLibrary().erase( g_state_wireframe );
}

void DVisDrawer::render( RenderStateFlags state ) const {
	//bleh
	std::list<DWinding *>::const_iterator l = m_list->begin();

	for (; l != m_list->end(); l++ )
	{
		DWinding* w = *l;

		glColor4f( w->clr[0], w->clr[1], w->clr[2], 0.5f );

		glBegin( GL_POLYGON );
		for ( int i = 0; i < w->numpoints; i++ ) {
			glVertex3f( ( w->p[i] )[0], ( w->p[i] )[1], ( w->p[i] )[2] );
		}
		glEnd();
	}
}

void DVisDrawer::renderWireframe( Renderer& renderer, const VolumeTest& volume ) const {
	if ( !m_list ) {
		return;
	}

	renderer.SetState( m_shader_wireframe, Renderer::eWireframeOnly );

	renderer.addRenderable( *this, g_matrix4_identity );
}

void DVisDrawer::renderSolid( Renderer& renderer, const VolumeTest& volume ) const {
	if ( !m_list ) {
		return;
	}

	renderer.SetState( m_shader_solid, Renderer::eWireframeOnly );
	renderer.SetState( m_shader_solid, Renderer::eFullMaterials );

	renderer.addRenderable( *this, g_matrix4_identity );
}

void DVisDrawer::SetList( std::list<DWinding*> *pointList ){
	if ( m_list ) {
		ClearPoints();
	}

	m_list = pointList;
}

void DVisDrawer::ClearPoints(){
	std::list<DWinding *>::const_iterator deadPoint = m_list->begin();
	for (; deadPoint != m_list->end(); deadPoint++ )
		delete *deadPoint;
	m_list->clear();
}