add test entities prototype

src/objects/Entities.cpp

@@ -0,0 +1,55 @@
+#include "Entities.hpp"
+
+#include "../assets/Assets.hpp"
+#include "../world/Level.hpp"
+#include "../physics/Hitbox.hpp"
+#include "../physics/PhysicsSolver.hpp"
+#include "../graphics/render/ModelBatch.hpp"
+#include "../graphics/core/Model.hpp"
+
+#include <glm/ext/matrix_transform.hpp>
+
+void Transform::refresh() {
+    combined = glm::mat4(1.0f);
+    combined = glm::translate(combined, pos);
+}
+
+Entities::Entities(Level* level) : level(level) {
+    auto entity = registry.create();
+    glm::vec3 pos(0.5f, 170, 0.5f);
+    glm::vec3 size(1);
+    registry.emplace<EntityId>(entity, 1);
+    registry.emplace<Transform>(entity, pos, size, glm::mat3(1.0f));
+    registry.emplace<Hitbox>(entity, pos, size/20.0f);
+}
+
+void Entities::updatePhysics(float delta){
+    auto view = registry.view<Transform, Hitbox>();
+    auto physics = level->physics.get();
+    for (auto [entity, transform, hitbox] : view.each()) {
+        physics->step(
+            level->chunks.get(),
+            &hitbox,
+            delta,
+            10,
+            false,
+            1.0f,
+            true
+        );
+        transform.pos = hitbox.position;
+        if (hitbox.grounded) {
+            hitbox.velocity.y = 10;
+        }
+    }
+}
+
+void Entities::render(Assets* assets, ModelBatch& batch) {
+    auto view = registry.view<Transform>();
+    auto model = assets->get<model::Model>("dingus");
+    for (auto [entity, transform] : view.each()) {
+        transform.refresh();
+        batch.pushMatrix(transform.combined);
+        batch.draw(model);
+        batch.popMatrix();
+    }
+}