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ADD: PickingSystem with AABB

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This commit is contained in:
sebastian 2026-08-04 15:50:07 +02:00
parent b879f2a636
commit f6096e2889
4 changed files with 21 additions and 15 deletions
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4
engine/src/ecs/standardComponents/PickableComponent.h
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@ -4,11 +4,11 @@
#ifndef COLORRACE_PICKABLECOMPONENT_H
#define COLORRACE_PICKABLECOMPONENT_H
#include "loader/models/AABB.h"
namespace engine {
struct PickableComponent {
AABB aabb;
};
}

19
engine/src/ecs/systems/PickingSystem.h
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@ -15,7 +15,7 @@
#define GLM_ENABLE_EXPERIMENTAL
#include <iostream>
#include "glm/gtx/string_cast.hpp"
#include "ecs/standardComponents/MeshComponent.h"
#include "renderer/entities/Camera.h"
#include "spdlog/spdlog.h"
@ -32,20 +32,23 @@ namespace engine {
//if (ImGui::GetIO().WantCaptureMouse) return std::nullopt;
if (!mouse.isClickEvent(MouseButton::LEFT)) return std::nullopt;
std::cout << "PickingSystem::update" << std::endl;
auto [origin, dir] = screenToRay(mouse.getXY(/*ndc=*/true), m_camera);
printf("Ray: %f %f %f\n", origin.x, origin.y, origin.z);
spdlog::info("Ray: {} {}", glm::to_string(origin), glm::to_string(dir));
float closestT = std::numeric_limits<float>::max();
std::optional<Entity> hit;
for (const auto& [entity, pickable] : registry.getPool<PickableComponent>()) {
const auto transform = registry.getComponent<TransformComponent>(entity);
// if (float t; raySphereIntersect(origin, dir, transform.m_position, pickable.radius, t) && t < closestT) {
// closestT = t;
// hit = entity;
// }
const auto mesh = registry.getComponent<MeshComponent>(entity);
AABB transformedAABB = mesh.model->getAABB().transformed(transform.computeModelMatrix());
Ray ray = Ray(origin, dir);
std::optional<RayHit> ray_hit = transformedAABB.intersects(ray, closestT);
if (ray_hit.has_value()) {
spdlog::info(std::format("Hit: {} {}", entity.value(), std::to_string(ray_hit.value().distance)));
closestT = ray_hit.value().distance;
hit = entity;
}
}
return hit;

11
engine/src/layer/DebugLayer.cpp
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@ -4,6 +4,7 @@
#include "DebugLayer.h"
#include "ecs/standardComponents/MeshComponent.h"
#include "ecs/standardComponents/PickableComponent.h"
#include "ecs/standardComponents/TransformComponent.h"
#include "GLFW/glfw3.h"
@ -24,12 +25,14 @@ void engine::DebugLayer::onRender() {
if (m_showDebugInfo) {
auto pickablePool = m_entityRegistry.getPool<PickableComponent>();
auto transforms = m_entityRegistry.getPool<engine::TransformComponent>();
for (auto& [entity, pickableComponent] : pickablePool) {
if (transforms.has(entity)) {
glm::vec3 halfExtent = pickableComponent.aabb.getHalfExtent();
spdlog::info(std::to_string(halfExtent.x) + " " + std::to_string(halfExtent.y) + " " + std::to_string(halfExtent.z));
const auto sphereTransformComp = TransformComponent(transforms.get(entity).m_position, {0,0,0}, halfExtent);
auto meshComponent = m_entityRegistry.getComponent<engine::MeshComponent>(entity);
glm::vec3 halfExtent = meshComponent.model.get()->getAABB().getHalfExtent();
//spdlog::info(std::to_string(halfExtent.x) + " " + std::to_string(halfExtent.y) + " " + std::to_string(halfExtent.z));
AABB transformedAABB = meshComponent.model->getAABB().transformed(transforms.get(entity).computeModelMatrix());
const auto sphereTransformComp = TransformComponent(transforms.get(entity).m_position, {0,0,0}, transformedAABB.getHalfExtent());
glm::mat4 modelMatrix = sphereTransformComp.computeModelMatrix();
RenderCommand renderCommand(m_sphereModel, modelMatrix);

2
game/src/ludo/PiecePresenter.cpp
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@ -19,7 +19,7 @@ void ludo::PiecePresenter::spawnPieces(const ludo::LudoGameState &state) {
{0.334296f, 0.334296f, 0.334296f});
m_registry.addComponent<engine::TransformComponent>(entity, transform);
m_registry.addComponent<engine::MeshComponent>(entity, engine::MeshComponent(m_pieceModels[std::string(ludo::toString(piece.color))]));
m_registry.addComponent<engine::PickableComponent>(entity, engine::PickableComponent(m_pieceModels[std::string(toString(piece.color))]->getAABB()));
m_registry.addComponent<engine::PickableComponent>(entity, engine::PickableComponent());
m_pieceEntities.push_back(entity);
}
}