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annotate libmlk-rpg/rpg/battle-indicator.c @ 250:8ef7fb7f14ad

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rpg: add support for collisions with actions While here, minimal cleanup in maps.
author David Demelier <markand@malikania.fr>
date Tue, 01 Dec 2020 19:24:11 +0100
parents 71b3b7036de7
children 196264679079
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192
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1 /*
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2 * battle-indicator.c -- drawable for rendering a hp/mp count usage
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3 *
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <math.h>
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21 #include <stdio.h>
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22 #include <string.h>
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23
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24 #include <core/color.h>
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25 #include <core/font.h>
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26 #include <core/panic.h>
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27
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28 #include <ui/theme.h>
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29
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30 #include "battle-indicator.h"
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31
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32 #define THEME(bti) ((bti)->theme ? (bti)->theme : theme_default())
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33 #define STEP (2)
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34 #define DELAY (5)
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35
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36 static inline unsigned int
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37 inc(int cmp, int tgt)
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38 {
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39 return tgt > cmp ? fmin(cmp + STEP, tgt) : fmax(cmp - STEP, tgt);
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40 }
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41
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42 static inline bool
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43 colored(const struct battle_indicator *bti)
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44 {
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45 /* Only check r, g, b and ignore alpha. */
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46 return COLOR_R(bti->cur) == COLOR_R(bti->color) &&
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47 COLOR_G(bti->cur) == COLOR_G(bti->color) &&
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48 COLOR_B(bti->cur) == COLOR_B(bti->color);
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49 }
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50
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51 void
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52 battle_indicator_start(struct battle_indicator *bti)
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53 {
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54 assert(bti);
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55
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56 char buf[128];
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57 const struct theme *theme = THEME(bti);
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58
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59 snprintf(buf, sizeof (buf), "%u", bti->amount);
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60
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61 bti->cur = 0xffffffff;
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62 bti->elapsed = 0;
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63 bti->alpha = 250;
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64
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65 if (!font_render(theme->fonts[THEME_FONT_INTERFACE], &bti->tex[0], buf, bti->cur) ||
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66 !font_render(theme->fonts[THEME_FONT_INTERFACE], &bti->tex[1], buf, 0x000000ff))
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67 panic();
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68 }
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69
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70 bool
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71 battle_indicator_completed(const struct battle_indicator *bti)
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72 {
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73 assert(battle_indicator_ok(bti));
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74
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75 return colored(bti) && bti->alpha == 0;
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76 }
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77
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78 bool
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79 battle_indicator_ok(const struct battle_indicator *bti)
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80 {
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81 return bti && texture_ok(&bti->tex[0]) && texture_ok(&bti->tex[1]);
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82 }
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83
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84 bool
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85 battle_indicator_update(struct battle_indicator *bti, unsigned int ticks)
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86 {
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87 assert(battle_indicator_ok(bti));
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88
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89 bti->elapsed += ticks;
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90
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91 if (bti->elapsed > DELAY) {
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92 bti->elapsed = 0;
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93
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94 if (!colored(bti)) {
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95 /* Update colors first. */
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96 bti->cur = COLOR_HEX(
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97 inc(COLOR_R(bti->cur), COLOR_R(bti->color)),
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98 inc(COLOR_G(bti->cur), COLOR_G(bti->color)),
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99 inc(COLOR_B(bti->cur), COLOR_B(bti->color)),
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100 255
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101 );
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102
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103 texture_set_color_mod(&bti->tex[0], bti->cur);
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104 } else {
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105 /* Update alpha next. */
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106 bti->alpha -= 10;
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107
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108 texture_set_alpha_mod(&bti->tex[0], bti->alpha);
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109 texture_set_alpha_mod(&bti->tex[1], bti->alpha);
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110 }
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111 }
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112
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113 return battle_indicator_completed(bti);
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114 }
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115
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116 void
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117 battle_indicator_draw(const struct battle_indicator *bti, int x, int y)
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118 {
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119 assert(battle_indicator_ok(bti));
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120
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121 texture_draw(&bti->tex[1], x + 1, y + 1);
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122 texture_draw(&bti->tex[0], x, y);
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123 }
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124
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125 void
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126 battle_indicator_finish(struct battle_indicator *bti)
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127 {
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128 assert(bti);
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129
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130 texture_finish(&bti->tex[0]);
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131 texture_finish(&bti->tex[1]);
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132
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133 memset(bti, 0, sizeof (*bti));
4ad7420ab678 rpg: add minimalist battle system, continue #2477 @60h
David Demelier <markand@malikania.fr>
parents:
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