trail.h

   1 #pragma once
   2
   3 typedef struct trail_system trail_system;
   4 typedef struct trail_point trail_point;
   5 typedef struct trail_vert trail_vert;
   6
   7 struct trail_system {
   8    struct trail_point {
   9       v3f co, normal, right;
  10       f32 alpha;
  11    }
  12    *array;
  13
  14 #pragma pack(push,1)
  15    struct trail_vert {
  16       v4f co; /* xyz: position, w: alpha */
  17    }
  18    *vertices;
  19 #pragma pack(pop)
  20
  21    i32 head, count, max;
  22    GLuint vao, vbo;
  23
  24    /* render settings */
  25    f32 width, lifetime, min_dist;
  26 };
  27
  28 void trail_alloc( trail_system *sys, u32 max );
  29 void trail_system_update( trail_system *sys, f32 dt, v3f co,
  30                           v3f normal, f32 alpha );
  31 void trail_system_debug( trail_system *sys );
  32 void trail_system_prerender( trail_system *sys );
  33 void trail_system_render( trail_system *sys, vg_camera *cam );