using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Terraria;
using Terraria.ModLoader;
using Terraria.ID;
using Terraria.Enums;
namespace DeadeyesKarma.Projectiles
{
public class CustomBeamProj : ModProjectile
{
public override void SetStaticDefaults()
{
DisplayName.SetDefault("GBLaser");
}
private Vector2 _targetPos; //Ending position of the laser beam
private int _charge; //The charge level of the weapon
private float _moveDist = 45f; //The distance charge particle from the player center
public override void SetDefaults()
{
projectile.width = 10;
projectile.height = 10;
projectile.friendly = true; //this defines if the projectile is frendly
projectile.penetrate = -1; //this defines the projectile penetration, -1 = infinity
projectile.tileCollide = false; //this defines if the tile can colide with walls
projectile.magic = true;
projectile.hide = true;
}
public override bool PreDraw(SpriteBatch spriteBatch, Color lightColor)
{
if (_charge == 100)
{
Vector2 unit = _targetPos - Main.player[projectile.owner].Center;
unit.Normalize();
DrawLaser(spriteBatch, Main.projectileTexture[projectile.type], Main.player[projectile.owner].Center, unit, 5, projectile.damage, -1.57f, 1f, 1000f, Color.White, 45);// this is the projectile sprite draw, 45 = the distance of where the projectile starts from the player
}
return false;
}
/// <summary>
/// The core function of drawing a laser
/// </summary>
public void DrawLaser(SpriteBatch spriteBatch, Texture2D texture, Vector2 start, Vector2 unit, float step, int damage, float rotation = 0f, float scale = 1f, float maxDist = 2000f, Color color = default(Color), int transDist = 50)
{
Vector2 origin = start;
float r = unit.ToRotation() + rotation;
#region Draw laser body
for (float i = transDist; i <= _moveDist; i += step)
{
Color c = Color.White;
origin = start + i * unit;
spriteBatch.Draw(texture, origin - Main.screenPosition,
new Rectangle(0, 26, 28, 26), i < transDist ? Color.Transparent : c, r,
new Vector2(28 / 2, 26 / 2), scale, 0, 0);
}
#endregion
#region Draw laser tail
spriteBatch.Draw(texture, start + unit * (transDist - step) - Main.screenPosition,
new Rectangle(0, 0, 28, 26), Color.White, r, new Vector2(28 / 2, 26 / 2), scale, 0, 0);
#endregion
#region Draw laser head
spriteBatch.Draw(texture, start + (_moveDist + step) * unit - Main.screenPosition,
new Rectangle(0, 52, 28, 26), Color.White, r, new Vector2(28 / 2, 26 / 2), scale, 0, 0);
#endregion
}
/// <summary>
/// Change the way of collision check of the projectile
/// </summary>
public override bool? Colliding(Rectangle projHitbox, Rectangle targetHitbox)
{
if (_charge == 100)
{
Player p = Main.player[projectile.owner];
Vector2 unit = (Main.player[projectile.owner].Center - _targetPos);
unit.Normalize();
float point = 0f;
if (Collision.CheckAABBvLineCollision(targetHitbox.TopLeft(), targetHitbox.Size(), p.Center - 95f * unit, p.Center - unit * _moveDist, 22, ref point))
{
return true;
}
}
return false;
}
/// <summary>
/// Change the behavior after hit a NPC
/// </summary>
public override void OnHitNPC(NPC target, int damage, float knockback, bool crit)
{
target.immune[projectile.owner] = 5;
}
/// <summary>
/// The AI of the projectile
/// </summary>
public override void AI()
{
Vector2 mousePos = Main.MouseWorld;
Player player = Main.player[projectile.owner];
#region Set projectile position
if (projectile.owner == Main.myPlayer) // Multiplayer support
{
Vector2 diff = mousePos - player.Center;
diff.Normalize();
projectile.position = player.Center + diff * _moveDist;
projectile.timeLeft = 2;
int dir = projectile.position.X > player.position.X ? 1 : -1;
player.ChangeDir(dir);
player.heldProj = projectile.whoAmI;
player.itemTime = 2;
player.itemAnimation = 2;
player.itemRotation = (float)Math.Atan2(diff.Y * dir, diff.X * dir);
projectile.soundDelay--;
#endregion
}
#region Charging process
// Kill the projectile if the player stops channeling
if (!player.channel)
{
projectile.Kill();
}
else
{
if (Main.time % 10 < 1 && !player.CheckMana(player.inventory[player.selectedItem].mana, true))
{
projectile.Kill();
}
Vector2 offset = mousePos - player.Center;
offset.Normalize();
offset *= _moveDist - 20;
Vector2 dustPos = player.Center + offset - new Vector2(10, 10);
if (_charge < 100)
{
_charge++;
}
int chargeFact = _charge / 20;
Vector2 dustVelocity = Vector2.UnitX * 18f;
dustVelocity = dustVelocity.RotatedBy(projectile.rotation - 1.57f, default(Vector2));
Vector2 spawnPos = projectile.Center + dustVelocity;
for (int k = 0; k < chargeFact + 1; k++)
{
Vector2 spawn = spawnPos + ((float)Main.rand.NextDouble() * 6.28f).ToRotationVector2() * (12f - (chargeFact * 2));
Dust dust = Main.dust[Dust.NewDust(dustPos, 30, 30, 235, projectile.velocity.X / 2f, //this 30, 30 is the dust weight and height 235 is the tail dust
projectile.velocity.Y / 2f, 0, default(Color), 1f)];
dust.velocity = Vector2.Normalize(spawnPos - spawn) * 1.5f * (10f - chargeFact * 2f) / 10f;
dust.noGravity = true;
dust.scale = Main.rand.Next(10, 20) * 0.05f;
}
}
#endregion
#region Set laser tail position and dusts
if (_charge < 100) return;
Vector2 start = player.Center;
Vector2 unit = (player.Center - mousePos);
unit.Normalize();
unit *= -1;
for (_moveDist = 95f; _moveDist <= 1600; _moveDist += 5) //this 1600 is the dsitance of the beam
{
start = player.Center + unit * _moveDist;
if (!Collision.CanHit(player.Center, 1, 1, start, 1, 1))
{
_moveDist -= 5f;
break;
}
if (projectile.soundDelay <= 0)//this is the proper sound delay for this type of weapon
{
Main.PlaySound(2, (int)projectile.Center.X, (int)projectile.Center.Y, 15); //this is the sound when the weapon is used cheange 15 for diferent sound
projectile.soundDelay = 40; //this is the proper sound delay for this type of weapon
}
}
_targetPos = player.Center + unit * _moveDist;
//dust
for (int i = 0; i < 2; ++i)
{
float num1 = projectile.velocity.ToRotation() + (Main.rand.Next(2) == 1 ? -1.0f : 1.0f) * 1.57f;
float num2 = (float)(Main.rand.NextDouble() * 0.8f + 1.0f);
Vector2 dustVel = new Vector2((float)Math.Cos(num1) * num2, (float)Math.Sin(num1) * num2);
Dust dust = Main.dust[Dust.NewDust(_targetPos, 0, 0, 235, dustVel.X, dustVel.Y, 0, new Color(), 1f)]; //this is the head dust
Dust dust2 = Main.dust[Dust.NewDust(_targetPos, 0, 0, 235, dustVel.X, dustVel.Y, 0, new Color(), 1f)]; //this is the head dust 2
dust.noGravity = true;
dust.scale = 1.2f;
}
#endregion
}
public override bool ShouldUpdatePosition()
{
return false;
}
}
}
