add radial triggers

res/content/base/entities/drop.json

@@ -1,6 +1,7 @@
 {
     "hitbox": [0.2, 0.125, 0.2],
     "triggers": [
-        ["aabb", -0.2, -0.2, -0.2, 0.2, 0.2, 0.2]
+        ["aabb", -0.2, -0.2, -0.2, 0.2, 0.2, 0.2],
+        ["radius", 1.6]
     ]
 }

res/content/base/scripts/components/drop.lua

@@ -4,6 +4,7 @@ local rig = entity.modeltree
 
 inair = true
 ready = false
+target = -1
 
 local dropitem = ARGS.item
 local scale = {1, 1, 1}
@@ -60,11 +61,20 @@ function on_fall()
 end
 
 function on_trigger_enter(index, oid)
-    if ready and oid == 0 then
+    if ready and oid == 0 and index == 0 then
         entity:despawn()
         inventory.add(player.get_inventory(oid), dropitem.id, dropitem.count)
         audio.play_sound_2d("events/pickup", 0.5, 0.8+math.random()*0.4, "regular")
     end
+    if index == 1 and ready and oid == 0 then
+        target = oid
+    end
+end
+
+function on_trigger_exit(index, oid)
+    if oid == target and index == 1 then
+        target = -1
+    end
 end
 
 function on_update()
@@ -79,4 +89,10 @@ function on_update()
         mat4.scale(matrix, scale, matrix)
         rig:set_matrix(0, matrix)
     end
+    if target ~= -1 then
+        local dir = vec3.sub({player.get_pos(target)}, tsf:get_pos())
+        vec3.normalize(dir, dir)
+        vec3.mul(dir, 10.0, dir)
+        body:set_vel(dir)
+    end
 end

res/content/base/scripts/hud.lua

@@ -14,7 +14,6 @@ function on_hud_open()
         local pvel = {player.get_vel(pid)}
         local ppos = vec3.add({player.get_pos(pid)}, {0, 0.7, 0})
         local throw_force = vec3.mul(player.get_dir(pid), DROP_FORCE)
-
         local drop = entities.spawn("base:drop", ppos, {item={
             id=itemid,
             count=1

src/content/ContentLoader.cpp

@@ -320,10 +320,12 @@ void ContentLoader::loadEntity(EntityDef& def, const std::string& name, const fs
             if (auto triggerarr = triggersarr->list(i)) {
                 auto triggerType = triggerarr->str(0);
                 if (triggerType == "aabb") {
-                    def.boxTriggers.push_back({
+                    def.boxTriggers.push_back({i, {
                         {triggerarr->num(1), triggerarr->num(2), triggerarr->num(3)},
                         {triggerarr->num(4), triggerarr->num(5), triggerarr->num(6)}
-                    });
+                    }});
+                } else if (triggerType == "radius") {
+                    def.radialTriggers.push_back({i, triggerarr->num(1)});
                 } else {
                     logger.error() << name << ": trigger #" << i << " - unknown type "
                         << util::quote(triggerType);

src/maths/aabb.hpp

@@ -8,7 +8,7 @@ struct AABB {
     glm::vec3 a {0.0f};
     glm::vec3 b {1.0f, 1.0f, 1.0f};
 
-    AABB() {}
+    AABB() = default;
 
     AABB(glm::vec3 size) : a(0.0f), b(size) {
     }

src/objects/Entities.cpp

@@ -42,6 +42,17 @@ void Entity::setRig(rigging::RigConfig* rigConfig) {
 Entities::Entities(Level* level) : level(level) {
 }
 
+template<void(*callback)(const Entity&, size_t, entityid_t)>
+static triggercallback create_trigger_callback(Entities* entities) {
+    return [=](auto entityid, auto index, auto otherid) {
+        if (auto entity = entities->get(entityid)) {
+            if (entity->isValid()) {
+                callback(*entity, index, otherid);
+            }
+        }
+    };
+}
+
 entityid_t Entities::spawn(
     Assets* assets,
     EntityDef& def,
@@ -59,28 +70,25 @@ entityid_t Entities::spawn(
     registry.emplace<Transform>(entity, pos, size, glm::mat3(1.0f));
     auto& body = registry.emplace<Rigidbody>(
         entity, true, Hitbox {pos, def.hitbox}, std::vector<Trigger>{});
-    for (auto& box : def.boxTriggers) {
-        body.triggers.emplace_back(Trigger{
-            true,
-            id,
-            box,
-            AABB{},
-            {},
-            {},
-            [=](auto entityid, auto index, auto otherid) {
-                if (auto entity = get(entityid)) {
-                    if (entity->isValid()) {
-                        scripting::on_trigger_enter(*entity, index, otherid);
-                    }
-                }
-            },
-            [=](auto entityid, auto index, auto otherid) {
-                if (auto entity = get(entityid)) {
-                    if (entity->isValid()) {
-                        scripting::on_trigger_exit(*entity, index, otherid);
-                    }
-                }
-            }});
+
+    body.triggers.resize(def.radialTriggers.size() + def.boxTriggers.size());
+    for (auto& [i, box] : def.boxTriggers) {
+        TriggerParams params {};
+        params.aabb = box;
+        body.triggers[i] = Trigger {
+            true, TriggerType::AABB, i, id, params, params, {}, {},
+            create_trigger_callback<scripting::on_trigger_enter>(this),
+            create_trigger_callback<scripting::on_trigger_exit>(this)
+        };
+    }
+    for (auto& [i, radius] : def.radialTriggers) {
+        TriggerParams params {};
+        params.radial = glm::vec4(radius);
+        body.triggers[i] = Trigger {
+            true, TriggerType::RADIUS, i, id, params, params, {}, {},
+            create_trigger_callback<scripting::on_trigger_enter>(this),
+            create_trigger_callback<scripting::on_trigger_exit>(this)
+        };
     }
     auto& scripting = registry.emplace<Scripting>(
         entity, entity_funcs_set {}, nullptr);
@@ -135,8 +143,21 @@ void Entities::preparePhysics() {
             }
             trigger.prevEntered = trigger.nextEntered;
             trigger.nextEntered.clear();
-            trigger.calculated = trigger.aabb;
-            trigger.calculated.transform(transform.combined);
+
+            switch (trigger.type) {
+                case TriggerType::AABB:
+                    trigger.calculated.aabb = trigger.params.aabb;
+                    trigger.calculated.aabb.transform(transform.combined);
+                    break;
+                case TriggerType::RADIUS:
+                    trigger.calculated.radial = glm::vec4(
+                        rigidbody.hitbox.position.x,
+                        rigidbody.hitbox.position.y,
+                        rigidbody.hitbox.position.z,
+                        trigger.params.radial.w*
+                        trigger.params.radial.w);
+                    break;
+            }
             triggers.push_back(&trigger);
         }
     }
@@ -204,9 +225,11 @@ void Entities::renderDebug(LineBatch& batch, const Frustum& frustum) {
         batch.box(hitbox.position, hitbox.halfsize * 2.0f, glm::vec4(1.0f));
 
         for (auto& trigger : rigidbody.triggers) {
+            if (trigger.type != TriggerType::AABB)
+                continue;
             batch.box(
-                trigger.calculated.center(), 
-                trigger.calculated.size(), 
+                trigger.calculated.aabb.center(), 
+                trigger.calculated.aabb.size(), 
                 glm::vec4(1.0f, 1.0f, 0.0f, 1.0f));
         }
     }

src/objects/EntityDef.hpp

@@ -18,7 +18,8 @@ struct EntityDef {
 
     std::string scriptName = name.substr(name.find(':')+1);
     glm::vec3 hitbox {0.5f};
-    std::vector<AABB> boxTriggers {};
+    std::vector<std::pair<size_t, AABB>> boxTriggers {};
+    std::vector<std::pair<size_t, float>> radialTriggers {};
     std::string rigName = name.substr(name.find(":")+1);
     
     struct {

src/physics/Hitbox.hpp

@@ -8,15 +8,32 @@
 #include <functional>
 #include <glm/glm.hpp>
 
+enum class TriggerType {
+    AABB,
+    RADIUS,
+};
+
+union TriggerParams {
+    AABB aabb;
+    glm::vec4 radial; // x,y,z calculated entity coords + w - radius
+
+    constexpr TriggerParams() : aabb() {
+    }
+};
+
+using triggercallback = std::function<void(entityid_t, size_t, entityid_t)>;
+
 struct Trigger {
     bool enabled = true;
+    TriggerType type;
+    size_t index;
     entityid_t entity;
-    AABB aabb;
-    AABB calculated;
+    TriggerParams params;
+    TriggerParams calculated;
     std::set<entityid_t> prevEntered;
     std::set<entityid_t> nextEntered;
-    std::function<void(entityid_t, size_t, entityid_t)> enterCallback;
-    std::function<void(entityid_t, size_t, entityid_t)> exitCallback;
+    triggercallback enterCallback;
+    triggercallback exitCallback;
 };
 
 struct Hitbox {

src/physics/PhysicsSolver.cpp

@@ -7,13 +7,15 @@
 #include "../voxels/voxel.hpp"
 
 #include <iostream>
+#define GLM_ENABLE_EXPERIMENTAL
+#include <glm/gtx/norm.hpp>
 
 const float E = 0.03f;
 const float MAX_FIX = 0.1f;
 
 PhysicsSolver::PhysicsSolver(glm::vec3 gravity) : gravity(gravity) {
 }
-#include "../util/timeutil.hpp"
+
 void PhysicsSolver::step(
     Chunks* chunks, 
     Hitbox* hitbox, 
@@ -85,15 +87,27 @@ void PhysicsSolver::step(
     aabb.a = hitbox->position - hitbox->halfsize;
     aabb.b = hitbox->position + hitbox->halfsize;
     for (size_t i = 0; i < triggers.size(); i++) {
-        auto& trigger = triggers[i];
-        if (trigger->entity == entity) {
+        auto& trigger = *triggers[i];
+        if (trigger.entity == entity) {
             continue;
         }
-        if (aabb.intersect(trigger->calculated)) {
-            if (trigger->prevEntered.find(entity) == trigger->prevEntered.end()) {
-                trigger->enterCallback(trigger->entity, i, entity);
+
+        bool triggered = false;
+        switch (trigger.type) {
+            case TriggerType::AABB:
+                triggered = aabb.intersect(trigger.calculated.aabb);
+                break;
+            case TriggerType::RADIUS:
+                triggered = glm::distance2(
+                    hitbox->position, glm::vec3(trigger.calculated.radial))
+                     < trigger.calculated.radial.w;
+                break;
+        }
+        if (triggered) {
+            if (trigger.prevEntered.find(entity) == trigger.prevEntered.end()) {
+                trigger.enterCallback(trigger.entity, trigger.index, entity);
             }
-            trigger->nextEntered.insert(entity);
+            trigger.nextEntered.insert(entity);
         }
     }
 }