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/* glass.c - Copyright (C) 2001-2002 Jacob Kroon, see COPYING for details */
#include <stdlib.h>
#include <string.h>
#include "video.h"
#include "audio.h"
#include "tuxpuck.h"
/* defines */
#define GRAVITY ((float)-0.001)
/* externals */
extern unsigned char glass_png[];
extern unsigned char piece1_png[];
extern unsigned char piece2_png[];
extern unsigned char piece3_png[];
extern unsigned char piece4_png[];
extern unsigned char piece5_png[];
extern unsigned char crash_ogg[];
/* structs */
typedef struct {
float x, y, z, dx, dy;
Uint32 id;
SDL_Surface *sdl_image;
SDL_Rect rect;
} Piece;
/* statics */
static float _x, _z;
static SDL_Surface *_sdl_glass = NULL;
static SDL_Rect _rect;
static Piece *_piece[5];
static Sound *_snd_crash = NULL;
/* functions */
static Piece *_piece_create(Uint32 id)
{
Piece *piece = NULL;
SDL_Surface *image = NULL;
switch (id) {
case 0:
image = video_create_png_surface(piece1_png, NULL);
break;
case 1:
image = video_create_png_surface(piece2_png, NULL);
break;
case 2:
image = video_create_png_surface(piece3_png, NULL);
break;
case 3:
image = video_create_png_surface(piece4_png, NULL);
break;
case 4:
image = video_create_png_surface(piece5_png, NULL);
break;
default:
break;
}
if (id == 1)
SDL_SetColorKey(image, SDL_SRCCOLORKEY, 1);
piece = malloc(sizeof(Piece));
memset(piece, 0, sizeof(Piece));
piece->sdl_image = image;
piece->id = id;
return piece;
}
static void _piece_free(Piece * piece)
{
SDL_FreeSurface(piece->sdl_image);
free(piece);
}
static void _piece_erase(Piece * piece)
{
video_erase(&piece->rect);
}
static void _piece_blit(Piece * piece)
{
SDL_Surface *scaled_surface = NULL;
float scale, y;
scale = board_calc_scale(piece->z);
y = board_calc_y(piece->z) - piece->y * scale;
scaled_surface = video_scale_surface(piece->sdl_image, scale);
piece->rect.x = (Sint16) (SCREEN_W / 2 + scale * piece->x * 12.7);
piece->rect.y = (Sint16) (y - scaled_surface->h);
video_blit(scaled_surface, NULL, &piece->rect);
SDL_FreeSurface(scaled_surface);
}
static Uint8 _piece_update(Piece * piece, Uint32 time)
{
piece->dy += GRAVITY * time;
piece->x += piece->dx * time;
piece->y += piece->dy * time;
if (piece->y < -10)
return 0;
return 1;
}
static void _piece_reset(Piece * piece)
{
float x, z, dx;
entity_get_velocity((Entity *) board_get_puck(), &dx, NULL);
glass_get_position(&x, &z);
switch (piece->id) {
case 0:
piece->x = x - 2.5;
piece->y = 0;
piece->z = z;
piece->dx = -0.01;
piece->dy = 0.25;
break;
case 1:
piece->x = x - 1.9;
piece->y = 0.2;
piece->z = z;
piece->dx = -0.008;
piece->dy = 0.28;
break;
case 2:
piece->x = x + 0.5;
piece->y = 0;
piece->z = z;
piece->dx = 0.001;
piece->dy = 0.3;
break;
case 3:
piece->x = x + 1.0;
piece->y = 0.7;
piece->z = z;
piece->dx = 0.007;
piece->dy = 0.27;
break;
case 4:
piece->x = x + 1.1;
piece->y = 0.1;
piece->z = z;
piece->dx = 0.012;
piece->dy = 0.26;
break;
default:
break;
}
piece->dx += dx * 0.1;
}
void glass_init(void)
{
Uint8 i;
_x = _z = 0;
_sdl_glass = video_create_png_surface(glass_png, NULL);
for (i = 0; i < 5; i++)
_piece[i] = _piece_create(i);
memset(&_rect, 0, sizeof(SDL_Rect));
_snd_crash = audio_create_sound(crash_ogg, NULL);
}
void glass_deinit(void)
{
Uint8 i = 0;
SDL_FreeSurface(_sdl_glass);
for (i = 0; i < 5; i++)
_piece_free(_piece[i]);
audio_free_sound(_snd_crash);
}
void glass_smash(float x, float z)
{
Uint8 i;
_x = x - 1.2;
if (z < 0)
_z = -40;
else
_z = 40;
for (i = 0; i < 5; i++)
_piece_reset(_piece[i]);
audio_play_sound(_snd_crash);
}
Uint8 glass_update(Uint32 time)
{
Uint8 done = 1, i;
for (i = 0; i < 5; i++)
if (_piece_update(_piece[i], time) != 0)
done = 0;
return (!done);
}
void glass_get_position(float *x, float *z)
{
if (x)
*x = _x;
if (z)
*z = _z;
}
void glass_erase(void)
{
Uint8 i;
video_erase(&_rect);
for (i = 0; i < 5; i++)
_piece_erase(_piece[i]);
}
void glass_blit(void)
{
SDL_Surface *scaled_surface = NULL;
float scale, y;
Uint8 i;
scale = board_calc_scale(_z);
y = board_calc_y(_z);
scaled_surface = video_scale_surface(_sdl_glass, scale);
_rect.x =
(Sint16) (SCREEN_W / 2 - scaled_surface->w / 2 + scale * _x * 12.7);
_rect.y = (Sint16) (y - scaled_surface->h);
video_blit(scaled_surface, NULL, &_rect);
SDL_FreeSurface(scaled_surface);
for (i = 0; i < 5; i++)
_piece_blit(_piece[i]);
}
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