ascension: test/snake.c@18de2af03531

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  * Copyright 2023 Mike Becker. All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions are met:

     7  *

     8  *   1. Redistributions of source code must retain the above copyright

     9  *      notice, this list of conditions and the following disclaimer.

    10  *

    11  *   2. Redistributions in binary form must reproduce the above copyright

    12  *      notice, this list of conditions and the following disclaimer in the

    13  *      documentation and/or other materials provided with the distribution.

    14  *

    15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    16  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    18  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    19  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    20  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    21  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    24  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    25  * POSSIBILITY OF SUCH DAMAGE.

    26  */

    28 #include <ascension/ascension.h>

    29 #include <cx/printf.h>

    31 static void update_fps_counter(AscSceneNode *node) {

    32     // addition and multiplication is more efficient testing for zero

    33     // at an unnoticeable cost of imprecision

    34     static unsigned last_fps = 0u;

    35     static unsigned debounce = 999u;

    36     unsigned fps = 1000u;

    37     debounce += asc_context.elapsed_millis;

    38     if (debounce >= 1000u) {

    39         debounce = 0;

    40         fps /= asc_context.elapsed_millis;

    41         if (fps != last_fps) {

    42             last_fps = fps;

    43             snprintf(asc_text_data(node)->text, 9, "%u FPS", fps);

    44             asc_node_update(node);

    45         }

    46     }

    47 }

    49 static void create_fps_counter(void) {

    50     asc_set_font(asc_font(ASC_FONT_REGULAR, 24));

    51     asc_ink_rgb(255, 0, 0);

    52     AscSceneNode* node = asc_text(10, 10, "XXXXX FPS");

    53     asc_scene_add_behavior(node, update_fps_counter);

    54     asc_scene_add(&asc_window_active->ui, node);

    55 }

    57 static void update_score_counter(AscSceneNode *node) {

    58     // tie to bottom left of the screen

    59     if (asc_window_active->resized) {

    60         asc_vec2i bottom_left = asc_window_active->dimensions;

    61         asc_vec2i scale = asc_get_scale2d(node);

    62         asc_set_position2d(

    63                 node,

    64                 bottom_left.x - scale.width - 10,

    65                 bottom_left.y - scale.height - 10

    66         );

    67     }

    68 }

    70 static void create_score_counter(void) {

    71     asc_set_font(asc_font(ASC_FONT_BOLD, 14));

    72     asc_ink_rgb(0, 255, 0);

    73     AscSceneNode* node = asc_text(0, 0, "Score: 0");

    74     asc_scene_add_behavior(node, update_score_counter);

    75     asc_scene_add(&asc_window_active->ui, node);

    76 }

    78 int main(int argc, char** argv) {

    79     asc_context_initialize();

    80     if (asc_has_error()) {

    81         SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,

    82                 "Fatal Error",asc_get_error(),NULL);

    83         return 1;

    84     }

    86     // create window

    87     AscWindowSettings settings;

    88     asc_window_settings_init_defaults(&settings);

    89     settings.title = "Snake";

    90     AscWindow *window = asc_window_initialize(0, &settings);

    92     // create UI elements

    93     create_fps_counter();

    94     create_score_counter();

    97     // Main Loop

    98     do {

    99         // quit application on any error

   100         if (asc_has_error()) {

   101             SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,

   102                     "Fatal Error", asc_get_error(), window->window);

   103             asc_clear_error();

   104             break;

   105         }

   106     } while (asc_loop_next());

   108     asc_context_destroy();

   109     return 0;

   110 }

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