/*
   client/rader.cc
   This file is part of the Osirion project and is distributed under 
   the terms of the GNU General Public License version 2 
*/

#include "core/core.h"
#include "client/radar.h"
#include "client/video.h"
#include "render/draw.h"
#include "render/render.h"
namespace client 
{

void Radar::draw()
{
	using namespace render;

	if (!core::localcontrol())
		return;

	const float width = (float) video::width/4;
	const float height = (float) video::height/4;

	const float margin = 16;
	const float xscale = 128;
	const float yscale = xscale * height / width;

	const float left = video::width - margin - width;
	const float top = video::height -margin - height;

	gl::disable(GL_TEXTURE_2D);
	glEnableClientState(GL_VERTEX_ARRAY);
	glEnableClientState(GL_NORMAL_ARRAY);
	//glEnableClientState(GL_COLOR_ARRAY);

	// draw the transparent radar background
	gl::color(0.0f, 0.0f, 0.0f, 0.2f);
	gl::begin(gl::Quads);
	gl::vertex(left, top, 0.0f);
	gl::vertex(left + width, top, 0.0f);
	gl::vertex(left + width, top + height, 0.0f);
	gl::vertex(left, top + height, 0.0f);
	gl::end();
	
	math::Vector3f center(core::localcontrol()->location());

	gl::begin(gl::Points);
	std::map<unsigned int, core::Entity *>::iterator it;
	for (it=core::Entity::registry.begin(); it != core::Entity::registry.end(); it++) {
		core::Entity *entity = (*it).second;

		math::Vector3f position(entity->state()->location() - center);
		if ((position.x > -yscale) && (position.x < yscale) && (position.y > -xscale) && (position.y < xscale)) {
			float x = left + width/2 - position.y / xscale * width/2;
			float y = top + height/2 - position.x / xscale * width/2;
			if (entity->type() == core::Entity::Globe) {
				gl::end();
				gl::push();
				gl::translate(x, y, 0);
				float r = entity->radius() / xscale * width/2;
				draw_sphere(entity->color(), r);
				gl::pop();
				gl::begin(gl::Points);
			} else {
				gl::color(entity->color());
				gl::vertex(x , y , 0);
			}
		}
	}
	gl::end();

	gl::enable(GL_TEXTURE_2D);
	glDisableClientState(GL_VERTEX_ARRAY);
	glDisableClientState(GL_NORMAL_ARRAY);
	//glDisableClientState(GL_COLOR_ARRAY);
}

}