Mercurial > sdl-ios-xcode
annotate test/testintersections.c @ 5152:be02be2ea897
Making the API simpler, removed support for palettized video modes and textures.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 01 Feb 2011 21:23:43 -0800 |
parents | ad50b3db78bd |
children | d976b67150c5 |
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1 |
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2 /* Simple program: draw as many random objects on the screen as possible */ |
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3 |
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4 #include <stdlib.h> |
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5 #include <stdio.h> |
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6 #include <time.h> |
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7 |
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8 #include "common.h" |
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9 |
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10 #define SWAP(typ,a,b) do{typ t=a;a=b;b=t;}while(0) |
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11 #define NUM_OBJECTS 100 |
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12 |
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13 static CommonState *state; |
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14 static int num_objects; |
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15 static SDL_bool cycle_color; |
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16 static SDL_bool cycle_alpha; |
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17 static int cycle_direction = 1; |
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18 static int current_alpha = 255; |
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19 static int current_color = 255; |
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20 static SDL_BlendMode blendMode = SDL_BLENDMODE_NONE; |
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21 |
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22 void |
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23 DrawPoints(SDL_Window * window, SDL_Renderer * renderer) |
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24 { |
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25 int i; |
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26 int x, y; |
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27 int window_w, window_h; |
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28 |
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29 /* Query the sizes */ |
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30 SDL_GetWindowSize(window, &window_w, &window_h); |
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31 |
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32 for (i = 0; i < num_objects * 4; ++i) { |
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33 /* Cycle the color and alpha, if desired */ |
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34 if (cycle_color) { |
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35 current_color += cycle_direction; |
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36 if (current_color < 0) { |
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37 current_color = 0; |
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38 cycle_direction = -cycle_direction; |
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39 } |
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40 if (current_color > 255) { |
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41 current_color = 255; |
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42 cycle_direction = -cycle_direction; |
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43 } |
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44 } |
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45 if (cycle_alpha) { |
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46 current_alpha += cycle_direction; |
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47 if (current_alpha < 0) { |
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48 current_alpha = 0; |
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49 cycle_direction = -cycle_direction; |
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50 } |
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51 if (current_alpha > 255) { |
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52 current_alpha = 255; |
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53 cycle_direction = -cycle_direction; |
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54 } |
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55 } |
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56 SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color, |
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57 (Uint8) current_color, (Uint8) current_alpha); |
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58 |
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59 x = rand() % window_w; |
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60 y = rand() % window_h; |
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61 SDL_RenderDrawPoint(renderer, x, y); |
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62 } |
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63 } |
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64 |
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65 #define MAX_LINES 16 |
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66 int num_lines = 0; |
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67 SDL_Rect lines[MAX_LINES]; |
2997 | 68 static int |
69 add_line(int x1, int y1, int x2, int y2) | |
70 { | |
71 if (num_lines >= MAX_LINES) | |
72 return 0; | |
73 if ((x1 == x2) && (y1 == y2)) | |
74 return 0; | |
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75 |
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76 printf("adding line (%d, %d), (%d, %d)\n", x1, y1, x2, y2); |
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77 lines[num_lines].x = x1; |
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78 lines[num_lines].y = y1; |
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79 lines[num_lines].w = x2; |
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80 lines[num_lines].h = y2; |
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81 |
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82 return ++num_lines; |
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83 } |
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84 |
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85 |
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86 void |
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87 DrawLines(SDL_Window * window, SDL_Renderer * renderer) |
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88 { |
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89 int i; |
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90 int x1, y1, x2, y2; |
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91 int window_w, window_h; |
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92 |
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93 /* Query the sizes */ |
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94 SDL_GetWindowSize(window, &window_w, &window_h); |
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95 |
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96 for (i = 0; i < num_lines; ++i) { |
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97 SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); |
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98 |
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99 if (i == -1) { |
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100 SDL_RenderDrawLine(renderer, 0, 0, window_w - 1, window_h - 1); |
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101 SDL_RenderDrawLine(renderer, 0, window_h - 1, window_w - 1, 0); |
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102 SDL_RenderDrawLine(renderer, 0, window_h / 2, window_w - 1, window_h / 2); |
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103 SDL_RenderDrawLine(renderer, window_w / 2, 0, window_w / 2, window_h - 1); |
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104 } else { |
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105 SDL_RenderDrawLine(renderer, lines[i].x, lines[i].y, lines[i].w, lines[i].h); |
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106 } |
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107 } |
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108 } |
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109 |
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110 #define MAX_RECTS 16 |
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111 int num_rects = 0; |
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112 SDL_Rect rects[MAX_RECTS]; |
2997 | 113 static int |
114 add_rect(int x1, int y1, int x2, int y2) | |
115 { | |
116 if (num_rects >= MAX_RECTS) | |
117 return 0; | |
118 if ((x1 == x2) || (y1 == y2)) | |
119 return 0; | |
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120 |
2997 | 121 if (x1 > x2) |
122 SWAP(int, x1, x2); | |
123 if (y1 > y2) | |
124 SWAP(int, y1, y2); | |
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125 |
2997 | 126 printf("adding rect (%d, %d), (%d, %d) [%dx%d]\n", x1, y1, x2, y2, |
127 x2 - x1, y2 - y1); | |
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128 |
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129 rects[num_rects].x = x1; |
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130 rects[num_rects].y = y1; |
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131 rects[num_rects].w = x2 - x1; |
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132 rects[num_rects].h = y2 - y1; |
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133 |
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134 return ++num_rects; |
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135 } |
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136 |
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137 static void |
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138 DrawRects(SDL_Window * window, SDL_Renderer * renderer) |
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139 { |
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140 int i; |
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141 int window_w, window_h; |
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142 |
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143 /* Query the sizes */ |
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144 SDL_GetWindowSize(window, &window_w, &window_h); |
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145 |
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146 for (i = 0; i < num_rects; ++i) { |
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147 SDL_SetRenderDrawColor(renderer, 255, 127, 0, 255); |
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148 SDL_RenderFillRect(renderer, &rects[i]); |
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149 } |
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150 } |
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151 |
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152 static void |
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153 DrawRectLineIntersections(SDL_Window * window, SDL_Renderer * renderer) |
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154 { |
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155 int i, j, window_w, window_h; |
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156 |
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157 /* Query the sizes */ |
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158 SDL_GetWindowSize(window, &window_w, &window_h); |
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159 |
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160 for (i = 0; i < num_rects; i++) |
2997 | 161 for (j = 0; j < num_lines; j++) { |
162 int x1, y1, x2, y2; | |
163 SDL_Rect r; | |
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164 |
2997 | 165 r = rects[i]; |
166 x1 = lines[j].x; | |
167 y1 = lines[j].y; | |
168 x2 = lines[j].w; | |
169 y2 = lines[j].h; | |
170 | |
171 if (SDL_IntersectRectAndLine(&r, &x1, &y1, &x2, &y2)) { | |
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172 SDL_SetRenderDrawColor(renderer, 0, 255, 55, 255); |
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173 SDL_RenderDrawLine(renderer, x1, y1, x2, y2); |
2997 | 174 } |
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175 } |
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176 } |
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177 |
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178 static void |
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179 DrawRectRectIntersections(SDL_Window * window, SDL_Renderer * renderer) |
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180 { |
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181 int i, j; |
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182 |
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183 for (i = 0; i < num_rects; i++) |
2997 | 184 for (j = i + 1; j < num_rects; j++) { |
185 SDL_Rect r; | |
186 if (SDL_IntersectRect(&rects[i], &rects[j], &r)) { | |
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187 SDL_SetRenderDrawColor(renderer, 255, 200, 0, 255); |
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188 SDL_RenderFillRect(renderer, &r); |
2997 | 189 } |
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190 } |
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191 } |
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192 |
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193 int |
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194 main(int argc, char *argv[]) |
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195 { |
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196 int mouse_begin_x = -1, mouse_begin_y = -1; |
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197 int i, done; |
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198 SDL_Event event; |
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199 Uint32 then, now, frames; |
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200 |
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201 /* Initialize parameters */ |
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202 num_objects = NUM_OBJECTS; |
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203 |
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204 /* Initialize test framework */ |
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205 state = CommonCreateState(argv, SDL_INIT_VIDEO); |
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206 if (!state) { |
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207 return 1; |
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208 } |
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209 for (i = 1; i < argc;) { |
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210 int consumed; |
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211 |
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212 consumed = CommonArg(state, i); |
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213 if (consumed == 0) { |
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214 consumed = -1; |
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215 if (SDL_strcasecmp(argv[i], "--blend") == 0) { |
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216 if (argv[i + 1]) { |
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217 if (SDL_strcasecmp(argv[i + 1], "none") == 0) { |
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218 blendMode = SDL_BLENDMODE_NONE; |
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219 consumed = 2; |
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220 } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) { |
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221 blendMode = SDL_BLENDMODE_BLEND; |
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222 consumed = 2; |
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223 } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) { |
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224 blendMode = SDL_BLENDMODE_ADD; |
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225 consumed = 2; |
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226 } |
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227 } |
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228 } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) { |
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229 cycle_color = SDL_TRUE; |
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230 consumed = 1; |
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231 } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) { |
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232 cycle_alpha = SDL_TRUE; |
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233 consumed = 1; |
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234 } else if (SDL_isdigit(*argv[i])) { |
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235 num_objects = SDL_atoi(argv[i]); |
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236 consumed = 1; |
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237 } |
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238 } |
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239 if (consumed < 0) { |
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240 fprintf(stderr, |
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241 "Usage: %s %s [--blend none|blend|add] [--cyclecolor] [--cyclealpha]\n", |
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242 argv[0], CommonUsage(state)); |
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243 return 1; |
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244 } |
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245 i += consumed; |
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246 } |
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247 if (!CommonInit(state)) { |
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248 return 2; |
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249 } |
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250 |
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251 /* Create the windows and initialize the renderers */ |
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252 for (i = 0; i < state->num_windows; ++i) { |
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253 SDL_Renderer *renderer = state->renderers[i]; |
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254 SDL_SetRenderDrawBlendMode(renderer, blendMode); |
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255 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF); |
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256 SDL_RenderClear(renderer); |
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257 } |
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258 |
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259 srand(time(NULL)); |
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260 |
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261 /* Main render loop */ |
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262 frames = 0; |
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263 then = SDL_GetTicks(); |
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264 done = 0; |
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265 while (!done) { |
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266 /* Check for events */ |
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267 ++frames; |
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268 while (SDL_PollEvent(&event)) { |
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269 CommonEvent(state, &event, &done); |
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270 switch (event.type) { |
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271 case SDL_MOUSEBUTTONDOWN: |
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272 mouse_begin_x = event.button.x; |
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273 mouse_begin_y = event.button.y; |
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274 break; |
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275 case SDL_MOUSEBUTTONUP: |
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276 if (event.button.button == 3) |
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277 add_line(mouse_begin_x, mouse_begin_y, event.button.x, |
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278 event.button.y); |
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279 if (event.button.button == 1) |
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280 add_rect(mouse_begin_x, mouse_begin_y, event.button.x, |
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281 event.button.y); |
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282 break; |
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283 case SDL_KEYDOWN: |
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284 switch (event.key.keysym.sym) { |
2997 | 285 case 'l': |
286 if (event.key.keysym.mod & KMOD_SHIFT) | |
287 num_lines = 0; | |
288 else | |
289 add_line(rand() % 640, rand() % 480, rand() % 640, | |
290 rand() % 480); | |
291 break; | |
292 case 'r': | |
293 if (event.key.keysym.mod & KMOD_SHIFT) | |
294 num_rects = 0; | |
295 else | |
296 add_rect(rand() % 640, rand() % 480, rand() % 640, | |
297 rand() % 480); | |
298 break; | |
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299 } |
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300 break; |
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301 default: |
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302 break; |
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303 } |
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304 } |
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305 for (i = 0; i < state->num_windows; ++i) { |
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306 SDL_Renderer *renderer = state->renderers[i]; |
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307 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF); |
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308 SDL_RenderClear(renderer); |
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309 |
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310 DrawRects(state->windows[i], renderer); |
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311 DrawPoints(state->windows[i], renderer); |
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312 DrawRectRectIntersections(state->windows[i], renderer); |
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313 DrawLines(state->windows[i], renderer); |
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314 DrawRectLineIntersections(state->windows[i], renderer); |
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315 |
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316 SDL_RenderPresent(renderer); |
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317 } |
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318 } |
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319 |
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320 CommonQuit(state); |
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321 |
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322 /* Print out some timing information */ |
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323 now = SDL_GetTicks(); |
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324 if (now > then) { |
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325 double fps = ((double) frames * 1000) / (now - then); |
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326 printf("%2.2f frames per second\n", fps); |
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327 } |
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328 return 0; |
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329 } |
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330 |
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331 /* vi: set ts=4 sw=4 expandtab: */ |