testTerminal.c

   1 /*
   2   Raycasting terminal test.
   3
   4   author: Miloslav Ciz
   5   license: CC0
   6 */
   7
   8 #define RCL_PIXEL_FUNCTION pixelFunc
   9 #define RCL_COMPUTE_WALL_TEXCOORDS 0
  10 #define RCL_COMPUTE_FLOOR_DEPTH 0
  11 #define RCL_COMPUTE_CEILING_DEPTH 0
  12
  13 #include <stdio.h>
  14 #include "raycastlib.h"
  15 #include <unistd.h>
  16 #include <stdlib.h>
  17
  18 #define LEVEL_W 20
  19 #define LEVEL_H 15
  20
  21 #define SCREEN_W 80
  22 #define SCREEN_H 40
  23
  24 char pixels[SCREEN_W * SCREEN_H];
  25 RCL_Camera camera;
  26
  27 const int8_t level[LEVEL_W * LEVEL_H] =
  28 {
  29 /*                      11  13  15  17  19
  30   0 1 2 3 4 5 6 7 8 9 10  12  14  16  18  */
  31   0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0, // 0
  32   0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0, // 1
  33   0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,1,0,0, // 2
  34   1,0,0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0, // 3
  35   0,0,0,0,0,0,0,0,0,1,0,0,1,1,1,0,0,1,0,0, // 4
  36   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0, // 5
  37   1,1,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0, // 6
  38   0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0, // 7
  39   0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,1,1,1,1, // 8
  40   0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0, // 9
  41   0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1, // 10
  42   0,0,0,0,0,1,0,0,0,1,0,0,0,0,1,1,1,0,0,1, // 11
  43   0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0, // 12
  44   0,0,0,0,0,1,0,0,0,1,1,1,0,0,1,0,0,0,0,0, // 13
  45   0,0,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,0,0  // 14
  46 };
  47
  48 RCL_Unit heightAt(int16_t x, int16_t y)
  49 {
  50   int32_t index = y * LEVEL_W + x;
  51
  52   if (index < 0 || (index >= LEVEL_W * LEVEL_H))
  53     return RCL_UNITS_PER_SQUARE * 2;
  54
  55   return level[y * LEVEL_W + x] * RCL_UNITS_PER_SQUARE * 2;
  56 }
  57
  58 void pixelFunc(RCL_PixelInfo *p)
  59 {
  60   char c = ' ';
  61
  62   if (p->isWall)
  63   {
  64     switch (p->hit.direction)
  65     {
  66       case 0:  c = 'X'; break;
  67       case 1:  c = '#'; break;
  68       case 2:  c = 'o'; break;
  69       case 3:
  70       default: c = '.'; break;
  71     }
  72   }
  73
  74   pixels[p->position.y * SCREEN_W + p->position.x] = c;
  75 }
  76
  77 void draw()
  78 {
  79   for (int i = 0; i < 10; ++i)
  80   printf("\n");
  81
  82   RCL_RayConstraints c;
  83
  84   RCL_initRayConstraints(&c);
  85
  86   c.maxHits = 1;
  87   c.maxSteps = 40;
  88
  89   RCL_renderSimple(camera,heightAt,0,0,c);
  90   //RCL_renderComplex(camera,heightAt,0,0,c);
  91
  92   for (int j = 0; j < SCREEN_H; ++j)
  93   {
  94     for (int i = 0; i < SCREEN_W; ++i)
  95       printf("%c",pixels[j * SCREEN_W + i]);
  96
  97     printf("\n");
  98   }
  99 }
 100
 101 int dx = 1;
 102 int dy = 0;
 103 int dr = 1;
 104 int frame = 0;
 105
 106 int main()
 107 {
 108   RCL_initCamera(&camera);
 109   camera.position.x = 2 * RCL_UNITS_PER_SQUARE;
 110   camera.position.y = 2 * RCL_UNITS_PER_SQUARE;
 111   camera.direction = 0;
 112   camera.resolution.x = SCREEN_W;
 113   camera.resolution.y = SCREEN_H;
 114
 115   for (int i = 0; i < 10000; ++i)
 116   {
 117     draw();
 118
 119     int squareX = RCL_divRoundDown(camera.position.x,RCL_UNITS_PER_SQUARE);
 120     int squareY = RCL_divRoundDown(camera.position.y,RCL_UNITS_PER_SQUARE);
 121
 122     if (rand() % 100 == 0)
 123     {
 124       dx = 1 - rand() % 3;
 125       dy = 1 - rand() % 3;
 126       dr = 1 - rand() % 3;
 127     }
 128
 129     while (heightAt(squareX + dx,squareY + dy) > 0)
 130     {
 131       dx = 1 - rand() % 3;
 132       dy = 1 - rand() % 3;
 133       dr = 1 - rand() % 3;
 134     }
 135
 136     camera.position.x += dx * 200;
 137     camera.position.y += dy * 200;
 138     camera.direction += dr * 10;
 139
 140     camera.height = RCL_UNITS_PER_SQUARE + RCL_sinInt(frame * 16) / 2;
 141
 142     usleep(100000);
 143
 144     frame++;
 145   }
 146
 147   return 0;
 148 }