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annotate src/main.c @ 15:f71eb24b3896

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placement of red walls with a button
author William Morgan <bill@mrgn.org>
date Sun, 12 Jan 2014 18:49:29 -0800
parents 5c7f33441e43
children a9500e8bff93 ea345aa9cc30
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1 #include <genesis.h>
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2 #include "creep.h"
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3
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4 // I now realize this should be one tile that uses the flipping flags. oops.
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5 const u32 cursor_tiles[4*8] = {
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6 0x21100000, // top left
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7 0x10000000,
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8 0x10000000,
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9 0x00000000,
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10 0x00000000,
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11 0x00000000,
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12 0x00000000,
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13 0x00000000,
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14
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15 0x00000000, // bottom left
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16 0x00000000,
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17 0x00000000,
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18 0x00000000,
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19 0x00000000,
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20 0x10000000,
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21 0x10000000,
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22 0x21100000,
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23
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24 0x00000112, // top right
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25 0x00000001,
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26 0x00000001,
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27 0x00000000,
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28 0x00000000,
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29 0x00000000,
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30 0x00000000,
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31 0x00000000,
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32
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33 0x00000000, // bottom right
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34 0x00000000,
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35 0x00000000,
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36 0x00000000,
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37 0x00000000,
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38 0x00000001,
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39 0x00000001,
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40 0x00000112,
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41
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42 };
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43
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44 #define EMPTY 0
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45 #define WALL 'O' + TILE_FONTINDEX
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46 #define TOWER 'T' + TILE_FONTINDEX
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47 #define GOAL 'G' + TILE_FONTINDEX
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48
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49 u16 tilemap[40*28];
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50 u16 countdown;
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51
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52 int cursor_x = 0; // tiles
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53 int cursor_y = 0; // tiles
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54 int pixels_per_tile = 8;
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55 const int cursor_width = 2; // tiles
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56
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57
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58 u16 build_order[3] = {
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59 EMPTY,
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60 WALL,
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61 TOWER,
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62 };
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63 u8 build_order_size = 3;
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64
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65 void joy_event_handler(u16 joy, u16 changed, u16 state) {
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66 u16 went_down = changed & state;
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67 if (went_down & BUTTON_UP) {
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68 cursor_y -= cursor_width;
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69 }
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70 if (went_down & BUTTON_DOWN) {
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71 cursor_y += cursor_width;
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72 }
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73 if (went_down & BUTTON_LEFT) {
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74 cursor_x -= cursor_width;
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75 }
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76 if (went_down & BUTTON_RIGHT) {
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77 cursor_x += cursor_width;
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78 }
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79 if (went_down & BUTTON_A) {
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80 tilemap[cursor_x + (cursor_y ) * 40] = TILE_ATTR_FULL(1, 0, 0, 0, WALL);
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81 tilemap[cursor_x + 1 + (cursor_y ) * 40] = TILE_ATTR_FULL(1, 0, 0, 0, WALL);
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82 tilemap[cursor_x + (cursor_y + 1) * 40] = TILE_ATTR_FULL(1, 0, 0, 0, WALL);
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83 tilemap[cursor_x + 1 + (cursor_y + 1) * 40] = TILE_ATTR_FULL(1, 0, 0, 0, WALL);
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84 }
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85 }
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86
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87 int main(void)
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88 {
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89 JOY_init();
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90 JOY_setEventHandler(&joy_event_handler);
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91
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92 u8 cursor_tile_index = 1;
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93 VDP_loadTileData((const u32 *)cursor_tiles, cursor_tile_index, 4, 0);
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94
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95 u16 i;
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96 VDP_setPlanSize(64, 32);
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97 for (i = 6; i < 40*28; i += 4)
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98 if ((i > 80 || i & 4) && (i < 40*26 || !(i & 4)) && i % 40 < 38)
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99 {
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100 tilemap[i] = 'O' + TILE_FONTINDEX;
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101 tilemap[i+1] = 'O' + TILE_FONTINDEX;
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102 }
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103
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104 tilemap[38 + 14*40] = TILE_ATTR_FULL(1, 0, 0, 0, 'G' + TILE_FONTINDEX);
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105 tilemap[39 + 14*40] = TILE_ATTR_FULL(1, 0, 0, 0, 'G' + TILE_FONTINDEX);
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106 tilemap[38 + 15*40] = TILE_ATTR_FULL(1, 0, 0, 0, 'G' + TILE_FONTINDEX);
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107 tilemap[39 + 15*40] = TILE_ATTR_FULL(1, 0, 0, 0, 'G' + TILE_FONTINDEX);
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108 gen_distances(38, 14);
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109 for (i = 0; i < MAX_SPRITE; i++)
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110 {
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111 spriteDefCache[i].posx = -0x80;
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112 }
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113 //print_distances();
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114 for (;;)
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115 {
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116 VDP_waitVSync();
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117 VDP_updateSprites();
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118 for (i = 0; i < 28; i++)
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119 {
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120 VDP_setTileMapRectByIndex(VDP_PLAN_B, tilemap + i*40, i*64, 40, 0);
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121 }
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122 VDP_setSprite(0, cursor_x * pixels_per_tile, cursor_y * pixels_per_tile, SPRITE_SIZE(2,2), TILE_ATTR_FULL(PAL0, 1, 0, 0, cursor_tile_index), spriteDefCache[0].link);
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123 if (countdown)
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124 --countdown;
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125 else if (cur_creeps < 4)
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126 {
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127 spawn_creep(CREEP_NORMAL, 4, 122);
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128 countdown = 300;
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129 }
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130 update_creeps();
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131 }
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132 return 0;
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133 }