cdo/retro-rpg
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Use offset specified in tiled for y-sorting objects

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It's now no longer using the bounding box on objects anywhere, but
we're going to want that soon anyway for culling off-screen entities
so I decided to leave it in.
This commit is contained in:
Camden Dixie O'Brien 2025-01-04 16:50:18 +00:00
parent 5eff48b449
commit d1fb902e8a
1 changed files with 27 additions and 7 deletions
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34
game/main.c
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@ -121,6 +121,7 @@ typedef struct {
SDL_Rect src;
SDL_Texture *tex;
dbox_t bbox;
int ysortoffset;
} objtype_t;
typedef struct {
@ -128,6 +129,7 @@ typedef struct {
unsigned type;
ivec_t pos;
dbox_t bbox;
int ysortoffset;
} objentity_t;
typedef struct {
@ -280,7 +282,7 @@ static unsigned load_objtype(
state->objtypes[id].src.w = prop_int(node, "width");
state->objtypes[id].src.h = prop_int(node, "height");
// Load bounding box from sprites document
// Load bounding box and y-sort offset from sprites document
const int sid = prop_int(node, "gid") - sidoff;
xmlNodePtr snode = sprites->xmlChildrenNode;
while (snode
@ -299,10 +301,27 @@ static unsigned load_objtype(
&& xmlStrcmp(snode->name, (const xmlChar *)"object") != 0)
snode = snode->next;
assert(snode);
state->objtypes[id].bbox.off.x = (double)prop_int(snode, "x");
state->objtypes[id].bbox.off.y = (double)prop_int(snode, "y");
state->objtypes[id].bbox.ext.x = (double)prop_int(snode, "width");
state->objtypes[id].bbox.ext.y = (double)prop_int(snode, "height");
bool gotbb = false, gotysort = false;
while (snode) {
if (xmlStrcmp(snode->name, (const xmlChar *)"object") == 0) {
if (xmlHasProp(snode, (const xmlChar *)"width")) {
state->objtypes[id].bbox.off.x
= (double)prop_int(snode, "x");
state->objtypes[id].bbox.off.y
= (double)prop_int(snode, "y");
state->objtypes[id].bbox.ext.x
= (double)prop_int(snode, "width");
state->objtypes[id].bbox.ext.y
= (double)prop_int(snode, "height");
gotbb = true;
} else {
state->objtypes[id].ysortoffset = prop_int(snode, "y");
gotysort = true;
}
}
snode = snode->next;
}
assert(gotbb && gotysort);
// Load custom properties
node = node->xmlChildrenNode;
@ -382,8 +401,9 @@ load_objects(gamestate_t *state, xmlNodePtr node, SDL_Renderer *renderer)
o->pos.x = prop_int(node, "x");
o->pos.y = prop_int(node, "y") - type->src.h;
// Load bounding box from object type
// Load bounding box and ysortoffset from object type
o->bbox = type->bbox;
o->ysortoffset = type->ysortoffset;
} while ((node = node->next) != NULL);
xmlFreeDoc(spritesdoc);
@ -630,7 +650,7 @@ static inline double dynentity_bottom(const dynentity_t *e)
static inline double objentity_bottom(const objentity_t *e)
{
return (double)e->pos.y + e->bbox.off.y + e->bbox.ext.y;
return (double)(e->pos.y + e->ysortoffset);
}
static inline double entity_bottom(entity_t *e)