Code

For a long time I’v been interested in running game-specific/entity-specific code in coroutines. Something like the following. void some_game_object_behavior( entity ent, ... ) { pnt3 points[] = { {1,1,1}, {2,2,2}, {3,3,3}, {4,4,4} }; int pos = 0; while(entity_alive(ent)) { // move the entity to a position and yield coroutine while movement is ongoing. move_to(ent, points[pos % ARRAY_LENGTH(points)]); pos++; for(int i = 0; i < 4; ++i) { shoot_bullet(ent); wait_sec(ent, 2); // do nothing for 2 seconds and yield the coroutine for that duration.

As I might have written before I like printf-style string-formating. It’s imho the most convenient way to format strings and it can be really powerful if needed. However something that can be a bit tedious is output:ing “composite” values such as a vec3 or quaternion as there will be quite a bunch of repetition. printf("{ %.2f, %.2f, %.2f }", vec.x, vec.x, vec.z); Doing this for multiple values really get verbose and its easy to make simple copy-paste-errors ( see above!

This is the story of an unexpected ABI break that I thought would be worth documenting. At Avalanche we use a small class wrapping 32bit hashes called CHashString, it is basically just a wrapper around uint32_t and one should be able to treat it as a uint32_t in code except for operations that do not make sense on a hash-value. Why would you want a class like this you might ask, well we use it for adding a const char* c_str()-function that can be used in logging and also we use it to add custom natvis-support in visual studio so that you can just hover a CHashString and have a lookup of the hash-value performed.