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Implement drawlist updating for decreasing y

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This commit is contained in:
Camden Dixie O'Brien 2025-01-04 13:03:19 +00:00
parent f3c9d6ac30
commit 765e2c32c8
1 changed files with 41 additions and 3 deletions
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44
game/main.c
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@ -646,6 +646,44 @@ static void update_drawlist(dynentity_t *e, entity_t **drawlist)
n->prev->next = (entity_t *)e;
n->prev = (entity_t *)e;
}
} else {
// The entity moved up -- this is mostly symmetric with the
// above case.
entity_t *n = e->e.prev;
if (n == NULL)
return;
const int y = dynentity_bottom(e);
int prevy = entity_bottom(n);
if (y >= prevy)
return;
while (n->prev != NULL && y < prevy) {
n = n->prev;
prevy = entity_bottom(n);
}
assert(n != NULL);
if (y < prevy) {
e->e.prev->next = e->e.next;
e->e.next->prev = e->e.prev;
e->e.prev = NULL;
e->e.next = n;
*drawlist = n->prev = (entity_t *)e;
} else {
if (e->e.next == NULL) {
e->e.prev->next = NULL;
} else {
e->e.next->prev = e->e.prev;
e->e.prev->next = e->e.next;
}
e->e.next = n->next;
e->e.prev = n;
n->next->prev = (entity_t *)e;
n->next = (entity_t *)e;
}
}
}
@ -675,7 +713,8 @@ static void update_dynentity(gamestate_t *state, dynentity_t *e, double dt)
e->svar = SPRITE_DIR_UP;
}
// Apply velocity (handling map collisions)
// Apply velocity, handling map collisions and updating the
// drawlist
const double nextx = e->pos.x + dt * e->speed * e->dir.x;
const double nexty = e->pos.y + dt * e->speed * e->dir.y;
const dvec_t pfb
@ -692,8 +731,7 @@ static void update_dynentity(gamestate_t *state, dynentity_t *e, double dt)
if (valid) {
e->pos.x = nextx;
e->pos.y = nexty;
update_drawlist(e);
update_drawlist(e, &state->drawlist);
}
}