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Properly link flecs library

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This commit is contained in:
Klemen Plestenjak
2023-11-09 11:38:29 +01:00
parent dc585396c3
commit 8edcf9305c
1392 changed files with 390081 additions and 164 deletions
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16
engine/libs/flecs/examples/cpp/queries/group_by_callbacks/include/group_by_callbacks.h Normal file
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#ifndef GROUP_BY_CALLBACKS_H
#define GROUP_BY_CALLBACKS_H
/* This generated file contains includes for project dependencies */
#include "group_by_callbacks/bake_config.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __cplusplus
}
#endif
#endif

24
engine/libs/flecs/examples/cpp/queries/group_by_callbacks/include/group_by_callbacks/bake_config.h Normal file
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/*
)
(.)
.|.
| |
_.--| |--._
.-'; ;`-'& ; `&.
\ & ; & &_/
|"""---...---"""|
\ | | | | | | | /
`---.|.|.|.---'
* This file is generated by bake.lang.c for your convenience. Headers of
* dependencies will automatically show up in this file. Include bake_config.h
* in your main project file. Do not edit! */
#ifndef GROUP_BY_CALLBACKS_BAKE_CONFIG_H
#define GROUP_BY_CALLBACKS_BAKE_CONFIG_H
/* Headers of public dependencies */
#include <flecs.h>
#endif

11
engine/libs/flecs/examples/cpp/queries/group_by_callbacks/project.json Normal file
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{
"id": "group_by_callbacks",
"type": "application",
"value": {
"use": [
"flecs"
],
"public": false,
"language": "c++"
}
}

157
engine/libs/flecs/examples/cpp/queries/group_by_callbacks/src/main.cpp Normal file
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#include <group_by_callbacks.h>
#include <iostream>
// This example shows how the on_group_create and on_group_delete callbacks can
// be used to get notified when a new group is registered for a query. These
// callbacks make it possible to associate and manage user data attached to
// groups.
struct Position {
double x, y;
};
// Custom type to associate with group
struct group_ctx {
int32_t counter;
};
int group_counter = 0;
// Dummy tag to put entities in different tables
struct Tag { };
// Create a relationship to use for the group_by function. Tables will
// be assigned the relationship target as group id
struct Group { };
// Targets for the relationship, which will be used as group ids.
struct First { };
struct Second { };
struct Third { };
int main() {
flecs::world ecs;
// Register components in order so that id for First is lower than Third
ecs.component<First>();
ecs.component<Second>();
ecs.component<Third>();
// Grouped query
flecs::query<Position> q = ecs.query_builder<Position>()
.group_by<Group>()
// Callback invoked when a new group is created
.on_group_create([](flecs::world_t *world,
uint64_t id, // id of the group that was created
void *group_by_arg) // group_by_ctx parameter in ecs_query_desc_t struct
{
(void)group_by_arg; // silence unused warning
flecs::world w(world);
std::cout << "Group " << w.entity(id).name() << " created\n";
// Return data that will be associated with the group
group_ctx *ctx = new group_ctx;
ctx->counter = ++ group_counter;
return static_cast<void*>(ctx); // Cast to make sure function type matches
})
// Callback invoked when a group is deleted
.on_group_delete([](flecs::world_t *world,
uint64_t id, // id of the group that was deleted
void *ctx, // group context
void *group_by_arg) // group_by_ctx parameter in ecs_query_desc_t struct
{
(void)group_by_arg; // silence unused warning
flecs::world w(world);
std::cout << "Group " << w.entity(id).name() << " deleted\n";
// Free data associated with group
delete static_cast<group_ctx*>(ctx);
})
.build();
// Create entities in 6 different tables with 3 group ids
ecs.entity().add<Group, Third>()
.set<Position>({1, 1});
ecs.entity().add<Group, Second>()
.set<Position>({2, 2});
ecs.entity().add<Group, First>()
.set<Position>({3, 3});
ecs.entity().add<Group, Third>()
.set<Position>({4, 4})
.add<Tag>();
ecs.entity().add<Group, Second>()
.set<Position>({5, 5})
.add<Tag>();
ecs.entity().add<Group, First>()
.set<Position>({6, 6})
.add<Tag>();
// The query cache now looks like this:
// - group First:
// - table [Position, (Group, First)]
// - table [Postion, Tag, (Group, First)]
//
// - group Second:
// - table [Position, (Group, Second)]
// - table [Postion, Tag, (Group, Second)]
//
// - group Third:
// - table [Position, (Group, Third)]
// - table [Postion, Tag, (Group, Third)]
//
std::cout << "\n";
q.iter([&](flecs::iter& it, Position *p) {
flecs::entity group = ecs.entity(it.group_id());
group_ctx *ctx = static_cast<group_ctx*>(q.group_ctx(group));
std::cout << " - group " << group.path() << ": table ["
<< it.table().str() << "]\n";
std::cout << " counter: " << ctx->counter << "\n";
for (auto i : it) {
std::cout << " {" << p[i].x << ", " << p[i].y << "}\n";
}
std::cout << "\n";
});
// Deleting the query will call the on_group_deleted callback
q.destruct();
// Output:
// Group Third created
// Group Second created
// Group First created
//
// - group ::First: table [Position, (Group,First)]
// counter: 3
// {3, 3}
//
// - group ::First: table [Position, Tag, (Group,First)]
// counter: 3
// {6, 6}
//
// - group ::Second: table [Position, (Group,Second)]
// counter: 2
// {2, 2}
//
// - group ::Second: table [Position, Tag, (Group,Second)]
// counter: 2
// {5, 5}
//
// - group ::Third: table [Position, (Group,Third)]
// counter: 1
// {1, 1}
//
// - group ::Third: table [Position, Tag, (Group,Third)]
// counter: 1
// {4, 4}
//
// Group Third deleted
// Group Second deleted
// Group First deleted
}