344 lines
12 KiB
C#
344 lines
12 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 Bullet : MonoBehaviour
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{
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public struct ShellStats
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{
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public int directDamage;
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public float directHitDamageMultiplier;
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public float splashRadius;
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public float splashDamageMultiplier;
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public float speedMultiplier;
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public float knockback;
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public float shrapnelEdgeDamageMultiplier;
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public int fragmentCount;
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public float burningGroundDuration;
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public float concussiveSlowMultiplier;
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public float concussiveSlowDuration;
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public float craterDuration;
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public float craterSlowMultiplier;
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public float chainDetonationMultiplier;
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public float executionDamageMultiplier;
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public float finisherDamageMultiplier;
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public float delayedFuseSeconds;
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public float volatileSecondaryExplosionMultiplier;
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}
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public float speed = 5f;
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public GameObject shatterEffectPrefab;
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ShellStats stats;
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Transform target;
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Vector2 lastKnownDirection;
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bool hasTarget = true;
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bool exploded;
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void Awake()
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{
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stats = new ShellStats
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{
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directDamage = 1,
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directHitDamageMultiplier = 1f,
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splashRadius = 1.15f,
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splashDamageMultiplier = 0.45f,
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speedMultiplier = 1f,
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concussiveSlowMultiplier = 1f,
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craterSlowMultiplier = 1f,
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};
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}
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public void Configure(ShellStats shellStats)
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{
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stats = shellStats;
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stats.directDamage = Mathf.Max(1, stats.directDamage);
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stats.directHitDamageMultiplier = Mathf.Max(0f, stats.directHitDamageMultiplier);
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stats.splashRadius = Mathf.Max(0.25f, stats.splashRadius);
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stats.speedMultiplier = Mathf.Max(0.1f, stats.speedMultiplier);
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if (stats.concussiveSlowMultiplier <= 0f)
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stats.concussiveSlowMultiplier = 1f;
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if (stats.craterSlowMultiplier <= 0f)
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stats.craterSlowMultiplier = 1f;
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}
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public void SetTarget(GameObject enemy)
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{
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if (enemy != null)
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{
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target = enemy.transform;
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lastKnownDirection = (target.position - transform.position).normalized;
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UpdateRotation();
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}
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}
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public void SetDamage(int newDamage)
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{
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stats.directDamage = newDamage;
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}
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void Update()
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{
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if (exploded)
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return;
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if (hasTarget && target != null)
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{
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lastKnownDirection = (target.position - transform.position).normalized;
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}
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else
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{
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hasTarget = false;
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}
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UpdateRotation();
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transform.position += (Vector3)lastKnownDirection * (speed * stats.speedMultiplier) * Time.deltaTime;
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Destroy(gameObject, 5f);
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}
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void UpdateRotation()
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{
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if (lastKnownDirection.sqrMagnitude <= Mathf.Epsilon)
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return;
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transform.right = lastKnownDirection;
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}
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void OnTriggerEnter2D(Collider2D other)
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{
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if (!exploded && other.CompareTag("Enemy"))
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StartCoroutine(ExplodeAfterFuse(other.GetComponent<EnemyHealth>()));
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}
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IEnumerator ExplodeAfterFuse(EnemyHealth directTarget)
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{
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exploded = true;
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if (stats.delayedFuseSeconds > 0f)
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{
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GetComponent<Collider2D>().enabled = false;
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float elapsed = 0f;
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while (elapsed < stats.delayedFuseSeconds)
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{
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elapsed += Time.deltaTime;
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transform.position += (Vector3)lastKnownDirection * (speed * stats.speedMultiplier) * Time.deltaTime;
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yield return null;
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}
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}
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Explode(directTarget);
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Destroy(gameObject);
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}
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void Explode(EnemyHealth directTarget)
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{
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Vector2 center = transform.position;
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NotifyBulletHit();
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ShatterEffect();
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CreateShockwave(center, stats.splashRadius);
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HashSet<EnemyHealth> hitEnemies = new HashSet<EnemyHealth>();
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bool directKilled = false;
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if (directTarget != null)
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{
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Collider2D directCollider = directTarget.GetComponent<Collider2D>();
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if (directCollider != null)
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ApplyExplosionControl(directCollider, center - lastKnownDirection * 0.35f);
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int directDamage = CalculateDirectDamage(directTarget);
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directKilled = directTarget.TakeDamage(directDamage);
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hitEnemies.Add(directTarget);
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}
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Collider2D[] colliders = Physics2D.OverlapCircleAll(center, stats.splashRadius);
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foreach (Collider2D collider in colliders)
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{
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if (!collider.CompareTag("Enemy"))
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continue;
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EnemyHealth enemyHealth = collider.GetComponent<EnemyHealth>();
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if (enemyHealth == null || hitEnemies.Contains(enemyHealth))
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continue;
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float distance = Vector2.Distance(center, collider.transform.position);
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float falloff = Mathf.Clamp01(1f - distance / stats.splashRadius);
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int splashDamage = Mathf.Max(1, Mathf.RoundToInt(stats.directDamage * stats.splashDamageMultiplier * Mathf.Lerp(0.5f, 1f, falloff)));
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if (stats.shrapnelEdgeDamageMultiplier > 0f && distance >= stats.splashRadius * 0.68f)
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splashDamage += Mathf.Max(1, Mathf.RoundToInt(stats.directDamage * stats.shrapnelEdgeDamageMultiplier));
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bool killed = enemyHealth.TakeDamage(splashDamage);
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hitEnemies.Add(enemyHealth);
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ApplyExplosionControl(collider, center);
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if (killed)
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TriggerChainDetonation(collider.transform.position);
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}
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if (directKilled)
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{
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TriggerChainDetonation(center);
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TriggerVolatileDetonation(center);
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}
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SpawnFragments(center);
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SpawnLingeringArea(center);
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}
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int CalculateDirectDamage(EnemyHealth targetHealth)
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{
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float multiplier = stats.directHitDamageMultiplier;
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float healthPercent = targetHealth.GetHealthPercent();
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if (healthPercent >= 0.8f)
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multiplier *= 1f + stats.executionDamageMultiplier;
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if (healthPercent <= 0.3f)
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multiplier *= 1f + stats.finisherDamageMultiplier;
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return Mathf.Max(1, Mathf.RoundToInt(stats.directDamage * multiplier));
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}
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void ApplyExplosionControl(Collider2D enemyCollider, Vector2 center)
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{
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Enemy enemy = enemyCollider.GetComponent<Enemy>();
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if (enemy == null)
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return;
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if (stats.knockback > 0f)
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enemy.ApplyKnockback(center, stats.knockback);
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if (stats.concussiveSlowDuration > 0f)
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enemy.ApplySlow(stats.concussiveSlowMultiplier, stats.concussiveSlowDuration);
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}
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void SpawnFragments(Vector2 center)
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{
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if (stats.fragmentCount <= 0)
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return;
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Collider2D[] colliders = Physics2D.OverlapCircleAll(center, stats.splashRadius * 1.75f);
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int fragmentsLeft = stats.fragmentCount;
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foreach (Collider2D collider in colliders)
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{
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if (fragmentsLeft <= 0)
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break;
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if (!collider.CompareTag("Enemy"))
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continue;
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EnemyHealth enemyHealth = collider.GetComponent<EnemyHealth>();
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if (enemyHealth == null)
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continue;
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CreateFragmentVisual(center, collider.transform.position);
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enemyHealth.TakeDamage(Mathf.Max(1, Mathf.RoundToInt(stats.directDamage * 0.35f)));
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fragmentsLeft--;
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}
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}
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void SpawnLingeringArea(Vector2 center)
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{
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if (stats.burningGroundDuration <= 0f && stats.craterDuration <= 0f)
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return;
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GameObject area = new GameObject("CannonLingeringArea", typeof(CircleCollider2D), typeof(CannonAreaEffect));
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area.transform.position = center;
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CircleCollider2D circle = area.GetComponent<CircleCollider2D>();
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circle.isTrigger = true;
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circle.radius = stats.splashRadius * 0.72f;
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CannonAreaEffect effect = area.GetComponent<CannonAreaEffect>();
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effect.Configure(
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Mathf.Max(stats.burningGroundDuration, stats.craterDuration),
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stats.burningGroundDuration > 0f ? Mathf.Max(1, Mathf.RoundToInt(stats.directDamage * 0.18f)) : 0,
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stats.craterDuration > 0f ? stats.craterSlowMultiplier : 1f,
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stats.splashRadius * 0.72f);
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}
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void TriggerChainDetonation(Vector2 center)
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{
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if (stats.chainDetonationMultiplier <= 0f)
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return;
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DamageSecondaryExplosion(center, stats.splashRadius * 0.65f, stats.chainDetonationMultiplier);
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}
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void TriggerVolatileDetonation(Vector2 center)
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{
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if (stats.volatileSecondaryExplosionMultiplier <= 0f || Random.value > 0.2f)
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return;
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DamageSecondaryExplosion(center, stats.splashRadius * 0.75f, stats.volatileSecondaryExplosionMultiplier);
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}
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void DamageSecondaryExplosion(Vector2 center, float radius, float damageMultiplier)
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{
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CreateShockwave(center, radius);
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Collider2D[] colliders = Physics2D.OverlapCircleAll(center, radius);
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foreach (Collider2D collider in colliders)
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{
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if (!collider.CompareTag("Enemy"))
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continue;
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EnemyHealth enemyHealth = collider.GetComponent<EnemyHealth>();
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if (enemyHealth != null)
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enemyHealth.TakeDamage(Mathf.Max(1, Mathf.RoundToInt(stats.directDamage * damageMultiplier)));
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}
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}
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void NotifyBulletHit()
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{
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UpgradeManager upgradeManager = FindAnyObjectByType<UpgradeManager>();
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if (upgradeManager != null)
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upgradeManager.EnemyHitByBullet();
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}
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void ShatterEffect()
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{
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if (shatterEffectPrefab != null)
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Instantiate(shatterEffectPrefab, transform.position, Quaternion.identity);
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}
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static void CreateShockwave(Vector2 center, float radius)
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{
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GameObject ring = new GameObject("CannonShockwave", typeof(LineRenderer), typeof(ShockwaveEffect));
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ring.transform.position = center;
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LineRenderer line = ring.GetComponent<LineRenderer>();
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line.useWorldSpace = false;
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line.loop = true;
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line.positionCount = 48;
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line.startWidth = 0.035f;
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line.endWidth = 0.035f;
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line.material = new Material(Shader.Find("Sprites/Default"));
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line.startColor = new Color(0.95f, 0.82f, 0.45f, 0.82f);
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line.endColor = new Color(0.95f, 0.82f, 0.45f, 0.82f);
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for (int i = 0; i < line.positionCount; i++)
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{
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float angle = (float)i / line.positionCount * Mathf.PI * 2f;
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line.SetPosition(i, new Vector3(Mathf.Cos(angle), Mathf.Sin(angle), 0f) * radius);
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}
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ring.GetComponent<ShockwaveEffect>().Configure(0.28f);
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}
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static void CreateFragmentVisual(Vector2 start, Vector2 end)
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{
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GameObject fragment = new GameObject("ShrapnelFragment", typeof(LineRenderer), typeof(ShockwaveEffect));
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fragment.transform.position = start;
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LineRenderer line = fragment.GetComponent<LineRenderer>();
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line.useWorldSpace = true;
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line.positionCount = 2;
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line.SetPosition(0, start);
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line.SetPosition(1, end);
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line.startWidth = 0.045f;
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line.endWidth = 0.012f;
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line.material = new Material(Shader.Find("Sprites/Default"));
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line.startColor = new Color(0.82f, 0.84f, 0.88f, 0.95f);
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line.endColor = new Color(0.82f, 0.84f, 0.88f, 0.1f);
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fragment.GetComponent<ShockwaveEffect>().Configure(0.18f);
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}
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}
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