third persson prototype

src/Player.cpp

@@ -0,0 +1,111 @@
+#include "Player.h"
+
+#include <godot_cpp/classes/engine.hpp>
+#include <godot_cpp/classes/input.hpp>
+#include <godot_cpp/classes/input_map.hpp>
+#include <godot_cpp/core/class_db.hpp>
+#include <godot_cpp/variant/utility_functions.hpp>
+
+static const float WalkSpeed = 2.0;
+static const float RunSpeed = 5.0;
+static const float JumpStrength = 15.0;
+static const float Gravity = 50.0;
+
+static const float LerpValue = 0.15;
+static const float AnimationBlend = 7.0;
+
+namespace blitz {
+
+void Player::_bind_methods() {}
+
+Player::Player() {}
+Player::~Player() {}
+
+void Player::_ready() {
+	godot::InputMap::get_singleton()->load_from_project_settings();
+	m_PlayerMesh = Object::cast_to<godot::Node3D>(get_child(0));
+	m_SpringArmPivot = Object::cast_to<godot::Node3D>(get_child(2));
+	m_AnimationTree = Object::cast_to<godot::AnimationTree>(get_child(4));
+	DEV_ASSERT(m_PlayerMesh);
+	DEV_ASSERT(m_SpringArmPivot);
+	DEV_ASSERT(m_AnimationTree);
+
+	apply_floor_snap();
+	animate(0);
+}
+
+void Player::_physics_process(float delta) {
+	if (godot::Engine::get_singleton()->is_editor_hint())
+		return;
+
+
+	auto* Input = godot::Input::get_singleton();
+	godot::Vector3 move_direction{0, 0, 0};
+	move_direction.x = Input->get_action_strength("move_right") - Input->get_action_strength("move_left");
+	move_direction.z = Input->get_action_strength("move_backwards") - Input->get_action_strength("move_forwards");
+	move_direction = move_direction.rotated({0, 1, 0}, m_SpringArmPivot->get_rotation().y);
+
+	godot::Vector3 newVelocity = get_velocity();
+	newVelocity.y -= Gravity * delta;
+	set_velocity(newVelocity);
+
+
+
+	if (Input->is_action_pressed("run"))
+		m_Speed = RunSpeed;
+	else
+		m_Speed = WalkSpeed;
+
+	newVelocity = get_velocity();
+	newVelocity.x = move_direction.x * m_Speed;
+	newVelocity.z = move_direction.z * m_Speed;
+	set_velocity(newVelocity);
+
+	if (move_direction != godot::Vector3{0, 0, 0}) {
+		godot::Vector3 newRotation = m_PlayerMesh->get_rotation();
+		newRotation.y = godot::UtilityFunctions::lerp_angle(
+			newRotation.y, godot::UtilityFunctions::atan2(get_velocity().x, get_velocity().z), LerpValue);
+		m_PlayerMesh->set_rotation(newRotation);
+	}
+
+	bool justLanded = is_on_floor() && m_SnapVector == godot::Vector3{0, 0, 0};
+	bool isJumping = is_on_floor() && Input->is_action_just_pressed("jump");
+
+	if (isJumping) {
+		newVelocity = get_velocity();
+		newVelocity.y = JumpStrength;
+		set_velocity(newVelocity);
+		m_SnapVector.zero();
+	} else if (justLanded) {
+		m_SnapVector = {0, -1, 0};
+	}
+
+	apply_floor_snap();
+	move_and_slide();
+	animate(delta);
+}
+
+void Player::animate(float delta) {
+	if (is_on_floor()) {
+		m_AnimationTree->set("parameters/ground_air_transition/transition_request", "grounded");
+
+		if (get_velocity().length() > 0) {
+			if (m_Speed == RunSpeed) {
+				m_AnimationTree->set("parameters/iwr_blend/blend_amount",
+					godot::UtilityFunctions::lerp(
+						m_AnimationTree->get("parameters/iwr_blend/blend_amount"), 1.0, delta * AnimationBlend));
+			} else {
+				m_AnimationTree->set("parameters/iwr_blend/blend_amount",
+					godot::UtilityFunctions::lerp(
+						m_AnimationTree->get("parameters/iwr_blend/blend_amount"), 0.0, delta * AnimationBlend));
+			}
+		} else {
+			m_AnimationTree->set("parameters/iwr_blend/blend_amount",
+				godot::UtilityFunctions::lerp(
+					m_AnimationTree->get("parameters/iwr_blend/blend_amount"), -1.0, delta * AnimationBlend));
+		}
+	} else {
+		m_AnimationTree->set("parameters/ground_air_transition/transition_request", "air");
+	}
+}
+}  // namespace blitz