main.c 3.3 KB

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  1. /*
  2. * Voxel-a-tord
  3. * main.c:
  4. * Copyright (c) 2022 986-Studio. All rights reserved.
  5. *
  6. * Created by Manoël Trapier on 28/09/2022.
  7. */
  8. #include <stdio.h>
  9. #include <stdint.h>
  10. #include <stdbool.h>
  11. #include <sys/time.h>
  12. #include <SDL.h>
  13. #include <log.h>
  14. #include <display.h>
  15. bool isRunning = false;
  16. int previousFrameTime = 0;
  17. double deltaTime = 0;
  18. static double updateTime, renderTime, waitTime;
  19. static int windowHeight;
  20. static int windowWidth;
  21. uint32_t getMicroSecTime()
  22. {
  23. struct timeval curTime;
  24. gettimeofday(&curTime, NULL);
  25. return ((curTime.tv_sec) * 1000 * 1000) + (curTime.tv_usec);
  26. }
  27. void processInput()
  28. {
  29. SDL_Event event;
  30. while(SDL_PollEvent(&event))
  31. {
  32. switch (event.type)
  33. {
  34. case SDL_QUIT:
  35. isRunning = false;
  36. break;
  37. case SDL_KEYDOWN:
  38. switch (event.key.keysym.sym)
  39. {
  40. case SDLK_ESCAPE: isRunning = false; break;
  41. case SDLK_LEFT: break;
  42. case SDLK_RIGHT: break;
  43. case SDLK_UP: break;
  44. case SDLK_DOWN: break;
  45. case SDLK_PAGEUP: break;
  46. case SDLK_PAGEDOWN: break;
  47. }
  48. break;
  49. default:
  50. break;
  51. }
  52. }
  53. }
  54. void setup()
  55. {
  56. isRunning = true;
  57. }
  58. void update()
  59. {
  60. int i;
  61. uint32_t timeToWait = FRAME_TARGET_TIME - (SDL_GetTicks() - previousFrameTime);
  62. uint32_t ticks = getMicroSecTime();
  63. if (timeToWait <= FRAME_TARGET_TIME)
  64. {
  65. SDL_Delay(timeToWait);
  66. }
  67. deltaTime = (SDL_GetTicks() - previousFrameTime) / 1000.0;
  68. previousFrameTime = SDL_GetTicks();
  69. waitTime = (waitTime + (getMicroSecTime() - ticks) / 1000.) / 2.0;
  70. ticks = getMicroSecTime();
  71. /* [...] */
  72. updateTime = (updateTime + (getMicroSecTime() - ticks) / 1000.) / 2.0;
  73. }
  74. void render()
  75. {
  76. uint32_t ticks = getMicroSecTime();
  77. renderFrameBuffer();
  78. renderTime = (renderTime + (getMicroSecTime() - ticks) / 1000.) / 2.0;
  79. drawText(5, 5, 0x11FF22, "Wait time: %02.2f ms", waitTime);
  80. drawText(5, 17, 0x11FF22, "Update time: %02.2f ms", updateTime);
  81. drawText(5, 29, 0x11FF22, "Render time: %02.2f ms", renderTime);
  82. drawText(5, 41, 0x11FF22, "FPS: %.1f | dT: %.3f", 1000 / (waitTime + updateTime + renderTime), deltaTime);
  83. displayWindowRender();
  84. }
  85. int main(int argc, char *argv[])
  86. {
  87. int param_i, i;
  88. bool fullScreen = false;
  89. MAX_DEBUG_LEVEL = TLOG_DEBUG;
  90. Log(TLOG_ALWAYS, NULL, "Starting Voxel Engine (version %s)!", VERSION);
  91. windowWidth = 320;
  92. windowHeight = 240;
  93. for (param_i = 1 ; (param_i < argc) && (argv[param_i][0] == '-') ; param_i++)
  94. {
  95. switch (argv[param_i][1])
  96. {
  97. default: exit(-1); /* Option not recognized */
  98. case 'f': fullScreen = true; break;
  99. case 'w': windowWidth = atoi(argv[++param_i]); break;
  100. case 'h': windowHeight = atoi(argv[++param_i]); break;
  101. #ifdef DYNA_LOG_LEVEL
  102. case 'l': MAX_DEBUG_LEVEL = atoi(argv[++param_i]); break;
  103. #endif
  104. case '-': goto no_more_params; /* Could use break, but this is more clear */
  105. }
  106. }
  107. no_more_params:
  108. isRunning = initialiseWindow(windowWidth, windowHeight, fullScreen);
  109. setup();
  110. while (isRunning)
  111. {
  112. processInput();
  113. update();
  114. render();
  115. }
  116. destroyWindow();
  117. return 0;
  118. }