From 121387ba92a23d6f17b36331d25757abc899f7d2 Mon Sep 17 00:00:00 2001 From: max-001 Date: Wed, 4 Dec 2024 17:27:51 +0100 Subject: Implemeted seek behavior --- src/crepe/api/AI.h | 3 +++ src/crepe/system/AISystem.cpp | 45 +++++++++++++++++++++++++++++++++++++++++-- src/crepe/system/AISystem.h | 3 +++ src/example/AITest.cpp | 4 ++-- 4 files changed, 51 insertions(+), 4 deletions(-) diff --git a/src/crepe/api/AI.h b/src/crepe/api/AI.h index faeeba5..242ff89 100644 --- a/src/crepe/api/AI.h +++ b/src/crepe/api/AI.h @@ -51,6 +51,9 @@ public: float arrive_deceleration = 2.0f; private: + vec2 velocity; + friend class AISystem; + int flags = 0; }; diff --git a/src/crepe/system/AISystem.cpp b/src/crepe/system/AISystem.cpp index 12da3d9..9029f32 100644 --- a/src/crepe/system/AISystem.cpp +++ b/src/crepe/system/AISystem.cpp @@ -1,4 +1,7 @@ #include "../ComponentManager.h" +#include "api/LoopTimer.h" +#include "api/Transform.h" +#include "types.h" #include "AISystem.h" @@ -8,9 +11,19 @@ void AISystem::update() { ComponentManager & mgr = this->component_manager; RefVector ai_components = mgr.get_components_by_type(); + double dt = LoopTimer::get_instance().get_delta_time(); + for (AI & ai : ai_components) { vec2 force = this->calculate(ai); - //... + vec2 acceleration = force / ai.mass; + ai.velocity += acceleration * dt; + ai.velocity.truncate(ai.max_speed); + + // Update the position + RefVector transforms + = mgr.get_components_by_id(ai.game_object_id); + Transform & transform = transforms.front().get(); + transform.position += ai.velocity * dt; } } @@ -18,7 +31,11 @@ vec2 AISystem::calculate(AI & ai) { vec2 force; if (ai.on(AI::BehaviorType::SEEK)) { - // Seek the target + vec2 force_to_add = this->seek(ai); + + if (!this->accumulate_force(force, force_to_add)) { + return force; + } } if (ai.on(AI::BehaviorType::FLEE)) { // Flee from the target @@ -32,3 +49,27 @@ vec2 AISystem::calculate(AI & ai) { return force; } + +bool AISystem::accumulate_force(vec2 & running_total, vec2 force_to_add) { + double magnitude_remaining = running_total.length(); + double magnitude_to_add = force_to_add.length(); + + if (magnitude_remaining + magnitude_to_add > 0) { + running_total += force_to_add; + return true; + } + + return false; +} + +vec2 AISystem::seek(const AI & ai) { + ComponentManager & mgr = this->component_manager; + RefVector transforms = mgr.get_components_by_id(ai.game_object_id); + Transform & transform = transforms.front().get(); + + vec2 desired_velocity = ai.seek_target - transform.position; + desired_velocity.normalize(); + desired_velocity *= ai.max_speed; + + return desired_velocity - ai.velocity; +} diff --git a/src/crepe/system/AISystem.h b/src/crepe/system/AISystem.h index eb8d08c..5e94ccb 100644 --- a/src/crepe/system/AISystem.h +++ b/src/crepe/system/AISystem.h @@ -15,6 +15,9 @@ public: private: vec2 calculate(AI & ai); + bool accumulate_force(vec2 & running_total, vec2 force_to_add); + + vec2 seek(const AI & ai); }; } // namespace crepe diff --git a/src/example/AITest.cpp b/src/example/AITest.cpp index 1c4633f..341e1de 100644 --- a/src/example/AITest.cpp +++ b/src/example/AITest.cpp @@ -18,13 +18,13 @@ public: void load_scene() override { ComponentManager & mgr = this->component_manager; - GameObject game_object1 = mgr.new_object("", "", vec2{0, 0}, 0, 1); + GameObject game_object1 = mgr.new_object("", "", vec2{250, 250}, 0, 1); GameObject game_object2 = mgr.new_object("", "", vec2{0, 0}, 0, 1); Texture img = Texture("asset/texture/test_ap43.png"); game_object1.add_component(img, Color::MAGENTA, Sprite::FlipSettings{false, false}, 1, 1, 195); - game_object1.add_component(1, 1, 1); + game_object1.add_component(1, 200, 200).seek_on(); game_object2.add_component(Color::WHITE, ivec2{1080, 720}, vec2{1036, 780}, 1.0f); -- cgit v1.2.3