1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "vga.h"
#include "data.h"
#include "entities.h"
#include "player.h"
#include "snake.h"
#include "bat.h"
#include "old.h"
#include "bones.h"
#include "pickup.h"
#include "map.h"
/* current map; set via map_init */
static const uint8_t *cmap;
static uint8_t gold[MAP_W * MAP_H];
static uint8_t total_gold;
static void (* const init[])(Entity *) =
{
snake_init,
bat_init,
old_init,
bones_init,
pickup_time_init,
pickup_bonus_init,
pickup_pickaxe_init,
};
void map_init(const uint8_t map[])
{
cmap = map;
/* make a copy of the gold data in RAM */
memcpy(gold, cmap + MAP_W * MAP_H, MAP_W * MAP_H);
/* count how many pieces of gold on this map */
total_gold = 0;
for (uint16_t i = 0; i < MAP_W * MAP_H; i++)
/* gold is not 0xff */
if (gold[i] != 0xff)
total_gold++;
entities_init();
Entity *e;
/* spawn entities, 0xff is the list terminator */
for (
const uint8_t *ent = map + MAP_W * MAP_H * 2;
*ent != 0xff;
ent += 4
)
{
/* the player (entity 0) is not part of the entity system */
if (*ent == 0)
{
player_init(ent[1] * MAP_TILE_W, ent[2] * MAP_TILE_H, ent[3] & 1);
continue;
}
e = entities_new();
#ifdef DEBUG
if (!e)
{
set_mode(3);
fprintf(stderr, "ERROR: run out of entities\n");
exit(1);
}
#endif
e->ox = e->x = ent[1] * MAP_TILE_W;
e->oy = e->y = ent[2] * MAP_TILE_H;
e->dir = ent[3] & 1;
init[*ent - 1](e);
}
}
void map_render()
{
Rect src = { 0, 0, 160, 48 };
Rect dst = { 0, 0, 8, 8 };
for (uint8_t y = 0; y < MAP_H; y++)
for (uint8_t x = 0; x < MAP_W; x++)
{
dst.x = x * MAP_TILE_W;
dst.y = y * MAP_TILE_H + MAP_OFFS_Y;
uint8_t t = cmap[x + y * MAP_W];
src.x = (t % MAP_TILESET_COLS) * MAP_TILE_W;
src.y = (t / MAP_TILESET_COLS) * MAP_TILE_H;
blitrc(binary_tiles_start, &src, &dst);
t = gold[x + y * MAP_W];
/* not gold, skip! */
if (t == 0xff)
continue;
src.x = (t % MAP_TILESET_COLS) * MAP_TILE_W;
src.y = (t / MAP_TILESET_COLS) * MAP_TILE_H;
blitrc(binary_tiles_start, &src, &dst);
}
}
uint8_t map_is_blocked(uint16_t x, uint16_t y)
{
return cmap[(x / MAP_TILE_W) + (y / MAP_TILE_H) * MAP_W] >= MAP_FIRST_BLOCKED;
}
uint8_t map_is_deadly(uint16_t x, uint16_t y)
{
return cmap[(x / MAP_TILE_W) + (y / MAP_TILE_H) * MAP_W] >= MAP_FIRST_DEADLY;
}
uint8_t map_update_gold(uint16_t x, uint16_t y)
{
Rect src = { 0, 0, 160, 48 };
Rect dst = { 0, 0, 8, 8 };
uint16_t mx = x / MAP_TILE_W;
uint16_t my = y / MAP_TILE_H;
if (gold[mx + my * MAP_W] != 0xff)
{
/* this gold is collected */
gold[mx + my * MAP_W] = 0xff;
/* erase the background */
dst.x = mx * MAP_TILE_W;
dst.y = my * MAP_TILE_H + MAP_OFFS_Y;
uint8_t t = cmap[mx + my * MAP_W];
src.x = (t % MAP_TILESET_COLS) * MAP_TILE_W;
src.y = (t / MAP_TILESET_COLS) * MAP_TILE_H;
blit_target(TARGET_BUFFER);
blitrc(binary_tiles_start, &src, &dst);
blit_target(TARGET_SCREEN);
total_gold--;
return 1;
}
return 0;
}
uint8_t map_is_complete()
{
return total_gold == 0;
}
|
