treewars/game.cpp

#include "game.h"
#include "mathutils.h"
#include "drawutils.h"
#include "debug.h"
#include <SDL.h>

int Game::NODE_RADIUS = 12;


Game::Game(SDL_Surface* display)
    : GameState(display)
{
    background = NULL;
}


Game::~Game()
{
    SDL_FreeSurface(background);
}


bool Game::init()
{
    background = DrawUtils::load("background.bmp");

    if (background == NULL)
    {
#ifdef DEBUG
	std::cerr << "debug: Game::init(): error: Couldn't load background image\n";
#endif
	return false;
    }

    return true;
}


void Game::render()
{
    int range = data.get_range();
    int range_colour = 0x888888;

    switch(data.get_mode())
    {
    case MODE_MOVE:
	range_colour = 0x0000ff;
	break;
    case MODE_ATTACK:
	range_colour = 0xff0000;
	break;
    }

    // Background image first
    DrawUtils::draw(display, background, 0, 0);

    list<Vertex*> vertices = data.get_vertices();

    // Now paint on the targeting circle
    if (data.get_current_vertex() != NULL)
    {
	Vertex* v = data.get_current_vertex();
	DrawUtils::draw_circle_filled(display, v->x, v->y, range,
				      range_colour);
    }

    // Now paint each vertex, and any edges that it needs
    for (list<Vertex*>::iterator cursor = vertices.begin();
	 cursor != vertices.end(); cursor++)
    {
	Vertex* v = *cursor;
	DrawUtils::draw_circle_filled(display, v->x, v->y, v->r,
				      v->colour);
	for (list<Vertex*>::iterator subcursor = v->neighbors.begin();
	     subcursor != v->neighbors.end(); subcursor++)
	{
	    Vertex* v1 = *subcursor;
	    DrawUtils::draw_line(display, v->x, v->y, v1->x, v1->y, 2,
				 v->colour);
	}
    }

    SDL_Flip(display);
}


void Game::on_exit()
{
    throw StateExit();
}


void Game::on_lbutton_down(int x, int y)
{
    data.do_vertex(x, y, NODE_RADIUS);
}


void Game::on_rbutton_down(int mX, int mY)
{
    data.clear_current_vertex();
}


void Game::on_key_down(SDLKey sym, SDLMod mod, Uint16 unicode)
{
    if (sym == SDLK_q && mod & KMOD_CTRL) throw StateExit();
    if (sym == SDLK_a) data.set_mode(MODE_ATTACK);
    if (sym == SDLK_m) data.set_mode(MODE_MOVE);
}