1 | /* |
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2 | * ttyvaders Textmode shoot'em up |
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3 | * Copyright (c) 2002 Sam Hocevar <sam@zoy.org> |
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4 | * All Rights Reserved |
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5 | * |
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6 | * $Id: tunnel.c,v 1.6 2002/12/23 10:06:27 sam Exp $ |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or modify |
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9 | * it under the terms of the GNU General Public License as published by |
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10 | * the Free Software Foundation; either version 2 of the License, or |
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11 | * (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 | */ |
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22 | |
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23 | #include <stdlib.h> |
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24 | |
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25 | #include "common.h" |
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26 | |
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27 | static void draw_wall( game *g, int *wall, int delta ); |
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28 | |
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29 | /* Init tunnel */ |
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30 | tunnel * create_tunnel( game *g, int w, int h ) |
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31 | { |
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32 | int i; |
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33 | tunnel *t = malloc(sizeof(tunnel)); |
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34 | |
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35 | t->left = malloc(h*sizeof(int)); |
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36 | t->right = malloc(h*sizeof(int)); |
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37 | t->w = w; |
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38 | t->h = h; |
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39 | |
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40 | if( t->w >= g->w ) |
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41 | { |
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42 | for( i = 0; i < g->h; i++ ) |
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43 | { |
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44 | t->left[i] = -10; |
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45 | t->right[i] = g->w + 10; |
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46 | } |
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47 | } |
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48 | else |
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49 | { |
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50 | t->left[0] = (g->w - w) / 2; |
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51 | t->right[0] = (g->w + w) / 2; |
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52 | /* Yeah, sub-efficient, but less code to do :-) */ |
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53 | for( i = 0; i < g->h; i++ ) |
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54 | { |
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55 | update_tunnel( g, t ); |
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56 | } |
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57 | } |
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58 | |
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59 | return t; |
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60 | } |
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61 | |
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62 | void free_tunnel( tunnel *t ) |
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63 | { |
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64 | free( t->left ); |
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65 | free( t->right ); |
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66 | free( t ); |
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67 | } |
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68 | |
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69 | void draw_tunnel( game *g, tunnel *t ) |
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70 | { |
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71 | /* Print tunnel */ |
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72 | draw_wall( g, t->left, -2 ); |
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73 | draw_wall( g, t->right, -1 ); |
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74 | } |
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75 | |
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76 | void update_tunnel( game *g, tunnel *t ) |
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77 | { |
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78 | static int const delta[] = { -3, -2, -1, 1, 2, 3 }; |
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79 | int i,j,k; |
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80 | |
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81 | /* Slide tunnel one block vertically */ |
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82 | for( i = t->h - 1; i--; ) |
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83 | { |
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84 | t->left[i+1] = t->left[i]; |
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85 | t->right[i+1] = t->right[i]; |
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86 | } |
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87 | |
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88 | /* Generate new values */ |
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89 | i = delta[GET_RAND(0,6)]; |
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90 | j = delta[GET_RAND(0,6)]; |
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91 | |
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92 | /* Check in which direction we need to alter tunnel */ |
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93 | if( t->right[1] - t->left[1] < t->w ) |
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94 | { |
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95 | /* Not wide enough */ |
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96 | if( i > j ) |
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97 | { |
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98 | k = j; j = i; i = k; |
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99 | } |
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100 | } |
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101 | else if( t->right[1] - t->left[1] - 2 > t->w ) |
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102 | { |
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103 | /* Too wide */ |
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104 | if( i < j ) |
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105 | { |
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106 | k = j; j = i; i = k; |
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107 | } |
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108 | } |
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109 | else |
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110 | { |
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111 | /* No need to mess with i and j: width is OK */ |
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112 | } |
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113 | |
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114 | /* If width doesn't exceed game size, update coords */ |
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115 | if( t->w <= g->w || t->right[1] - t->left[1] < t->w ) |
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116 | { |
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117 | t->left[0] = t->left[1] + i; |
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118 | t->right[0] = t->right[1] + j; |
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119 | } |
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120 | else |
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121 | { |
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122 | t->left[0] = -10; |
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123 | t->right[0] = g->w + 10; |
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124 | } |
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125 | |
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126 | if( t->w > g->w ) |
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127 | { |
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128 | if( t->left[0] < 0 && t->right[0] < g->w - 2 ) |
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129 | { |
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130 | t->left[0] = t->left[1] + 1; |
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131 | } |
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132 | |
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133 | if( t->left[0] > 1 && t->right[0] > g->w - 1 ) |
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134 | { |
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135 | t->right[0] = t->right[1] - 1; |
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136 | } |
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137 | } |
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138 | else |
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139 | { |
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140 | if( t->left[0] < 0 ) |
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141 | { |
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142 | t->left[0] = t->left[1] + 1; |
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143 | } |
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144 | |
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145 | if( t->right[0] > g->w - 1 ) |
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146 | { |
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147 | t->right[0] = t->right[1] - 1; |
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148 | } |
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149 | } |
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150 | } |
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151 | |
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152 | static void draw_wall( game *g, int *wall, int delta ) |
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153 | { |
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154 | int i; |
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155 | |
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156 | gfx_color( RED ); |
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157 | |
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158 | for( i = 0; i < g->h ; i++ ) |
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159 | { |
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160 | char *str; |
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161 | |
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162 | if( wall[i] < -10 || wall[i] >= g->w + 10 ) |
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163 | { |
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164 | continue; |
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165 | } |
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166 | |
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167 | if( wall[i] > wall[i+1] ) |
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168 | { |
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169 | str = wall[i] > wall[i-1] ? ">##>" : "/##/"; |
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170 | } |
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171 | else |
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172 | { |
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173 | str = wall[i] > wall[i-1] ? "\\##\\" : "<##<"; |
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174 | } |
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175 | |
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176 | if( wall[i] == wall[i+1] + 2 ) |
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177 | { |
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178 | gfx_goto( wall[i] - 1 + delta, i ); |
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179 | gfx_putchar( '_' ); |
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180 | } |
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181 | |
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182 | gfx_goto( wall[i] + delta, i ); |
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183 | gfx_putstr( str ); |
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184 | if( wall[i] == wall[i+1] - 2 ) gfx_putchar( '_' ); |
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185 | } |
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186 | } |
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187 | |
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