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annotate libcore/core/drawable.c @ 216:33ddbe30440e

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rpg: improve collisions
author David Demelier <markand@malikania.fr>
date Wed, 18 Nov 2020 10:03:27 +0100
parents fea0cc899931
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * drawable.c -- automatic drawable objects
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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 <stddef.h>
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21 #include <stdlib.h>
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22 #include <string.h>
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23
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24 #include "animation.h"
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25 #include "drawable.h"
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26 #include "util.h"
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27 #include "sprite.h"
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28
136
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29 #define DRAWABLE_FOREACH(st, iter) \
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30 for (size_t i = 0; i < DRAWABLE_STACK_MAX && ((iter) = (st)->objects[i], 1); ++i)
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31
129
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32 bool
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33 drawable_update(struct drawable *dw, unsigned int ticks)
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34 {
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35 assert(dw);
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36
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37 return dw->update(dw, ticks);
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38 }
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39
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40 void
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41 drawable_draw(struct drawable *dw)
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42 {
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43 assert(dw);
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44
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45 dw->draw(dw);
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46 }
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47
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48 void
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49 drawable_end(struct drawable *dw)
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50 {
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51 assert(dw);
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52
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53 if (dw->end)
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54 dw->end(dw);
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55 }
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56
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57 void
129
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58 drawable_finish(struct drawable *dw)
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59 {
142
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60 assert(dw);
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61
129
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62 if (dw->finish)
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63 dw->finish(dw);
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64 }
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65
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66 void
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67 drawable_stack_init(struct drawable_stack *st)
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68 {
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69 assert(st);
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70
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71 memset(st, 0, sizeof (*st));
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72 }
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73
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74 bool
136
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75 drawable_stack_add(struct drawable_stack *st, struct drawable *dw)
129
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76 {
136
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77 assert(st);
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78 assert(dw);
129
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79
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80 for (size_t i = 0; i < DRAWABLE_STACK_MAX; ++i) {
136
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81 if (!st->objects[i]) {
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82 st->objects[i] = dw;
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83 return true;
129
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84 }
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85 }
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86
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87 return false;
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88 }
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89
142
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90 bool
129
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91 drawable_stack_update(struct drawable_stack *st, unsigned int ticks)
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92 {
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93 assert(st);
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94
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95 for (size_t i = 0; i < DRAWABLE_STACK_MAX; ++i) {
136
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96 struct drawable *dw = st->objects[i];
129
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97
136
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98 if (dw && drawable_update(dw, ticks)) {
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99 drawable_end(dw);
136
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100 drawable_finish(dw);
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101 st->objects[i] = NULL;
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102 }
129
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103 }
142
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104
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105 /*
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106 * We process the array again in case a drawable added a new drawable
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107 * within the update function.
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108 */
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109 return drawable_stack_completed(st);
129
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110 }
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111
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112 void
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113 drawable_stack_draw(struct drawable_stack *st)
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114 {
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115 assert(st);
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116
136
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117 struct drawable *dw;
129
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118
136
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119 DRAWABLE_FOREACH(st, dw)
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120 if (dw)
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121 drawable_draw(dw);
129
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122 }
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123
142
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124 bool
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125 drawable_stack_completed(const struct drawable_stack *st)
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126 {
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127 assert(st);
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128
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129 struct drawable *dw;
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130
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131 DRAWABLE_FOREACH(st, dw)
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132 if (dw)
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133 return false;
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134
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135 return true;
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136 }
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137
129
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138 void
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139 drawable_stack_finish(struct drawable_stack *st)
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140 {
142
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141 assert(st);
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142
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143 struct drawable *dw;
129
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144
142
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145 DRAWABLE_FOREACH(st, dw) {
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146 if (dw) {
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147 drawable_end(dw);
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148 drawable_finish(dw);
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149 }
129
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150 }
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151
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152 memset(st, 0, sizeof (*st));
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153 }