68 lines
2.9 KiB
C#
68 lines
2.9 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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public class Spaceship : MonoBehaviour
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{
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public GameObject spaceship;
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public GameObject bullet; // spawning bullets from the Spaceship class as they "belong" to the spaceship
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public float speed = 5.0f;
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public float rotationalSpeed = 2.0f;
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public float timeOfLastBullet;
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// Start is called before the first frame update
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void Start()
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{
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// start periodically checking for being off-screen
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InvokeRepeating ("CheckScreenEdges", 0.2f, 0.2f);
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}
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// Update is called once per frame
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void Update()
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{
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// move spaceship according to arrow keys
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// applying just a force to the spaceship object creates some unusual handling, but i feel that this is correct as in space there should be 0 drag, and if a force is applied in one direction, it should remain until it's cancelled out
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if (Input.GetKey(KeyCode.LeftArrow)) {
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spaceship.GetComponent<Rigidbody>().AddTorque(new Vector3(0, -rotationalSpeed, 0));
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}
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else if (Input.GetKey(KeyCode.RightArrow)) {
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spaceship.GetComponent<Rigidbody>().AddTorque(new Vector3(0, rotationalSpeed, 0));
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}
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else if (Input.GetKey(KeyCode.UpArrow)) {
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spaceship.GetComponent<Rigidbody>().AddRelativeForce(new Vector3(0, 0, speed));
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}
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else if (Input.GetKey(KeyCode.DownArrow)) {
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spaceship.GetComponent<Rigidbody>().AddRelativeForce(new Vector3(0, 0, -speed));
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}
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// shoot a bullet
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if (Input.GetKeyUp(KeyCode.Space) && Time.time - timeOfLastBullet >= 0.25) { // only spawning a bullet once the key is released and once 0.25 seconds has elapsed since the last bullet
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// spawning a bullet at the front tip of the spaceship
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Instantiate(bullet, spaceship.transform.position + spaceship.transform.forward * spaceship.transform.localScale.z, spaceship.transform.rotation);
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timeOfLastBullet = Time.time;
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}
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}
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private void CheckScreenEdges() {
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Vector3 pos = spaceship.transform.position;
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Vector3 vel = spaceship.GetComponent<Rigidbody>().velocity;
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float xTeleport = 0f, zTeleport = 0f;
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if (pos.x < GameManager.screenBottomLeft.x && vel.x <= 0f) // velocity check as sanity test
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xTeleport = GameManager.screenWidth;
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else if (pos.x > GameManager.screenTopRight.x && vel.x >= 0f)
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xTeleport = -GameManager.screenWidth;
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if (pos.z < GameManager.screenBottomLeft.z && vel.z <= 0f)
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zTeleport = GameManager.screenHeight;
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else if (pos.z > GameManager.screenTopRight.z && vel.z >= 0f)
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zTeleport = -GameManager.screenHeight;
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if (xTeleport != 0f || zTeleport != 0f)
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transform.position = new Vector3 (pos.x + xTeleport, 0f, pos.z + zTeleport);
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}
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}
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