110 lines
3.3 KiB
C#
110 lines
3.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Xml.Linq;
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using FarseerPhysics;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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namespace Subsurface.Particles
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{
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class ParticleManager
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{
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public static int particleCount;
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private const int MaxParticles = 1500;
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private Particle[] particles;
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private Dictionary<string, ParticlePrefab> prefabs;
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Camera cam;
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public ParticleManager(string configFile, Camera cam)
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{
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this.cam = cam;
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particles = new Particle[MaxParticles];
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XDocument doc = ToolBox.TryLoadXml(configFile);
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if (doc == null) return;
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prefabs = new Dictionary<string, ParticlePrefab>();
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foreach (XElement element in doc.Root.Elements())
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{
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if (prefabs.ContainsKey(element.Name.ToString()))
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{
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DebugConsole.ThrowError("Error in " + configFile + "! Each particle prefab must have a unique name.");
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continue;
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}
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prefabs.Add(element.Name.ToString(), new ParticlePrefab(element));
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}
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}
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public Particle CreateParticle(string prefabName, Vector2 position, float angle, float speed)
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{
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return CreateParticle(prefabName, position, new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle)) * speed, angle);
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}
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public Particle CreateParticle(string prefabName, Vector2 position, Vector2 speed, float rotation=0.0f)
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{
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ParticlePrefab prefab;
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prefabs.TryGetValue(prefabName, out prefab);
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if (prefab==null)
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{
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DebugConsole.ThrowError("Particle prefab "+prefabName+" not found!");
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return null;
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}
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return CreateParticle(prefab, position, speed, rotation);
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}
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public Particle CreateParticle(ParticlePrefab prefab, Vector2 position, Vector2 speed, float rotation=0.0f)
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{
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if (!Submarine.RectContains(cam.WorldView, position)) return null;
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if (particleCount >= MaxParticles) return null;
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if (particles[particleCount] == null) particles[particleCount] = new Particle();
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particles[particleCount].Init(prefab, position, speed, rotation);
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particleCount++;
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return particles[particleCount-1];
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}
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private void RemoveParticle(int index)
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{
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particleCount--;
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Particle swap = particles[index];
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particles[index] = particles[particleCount];
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particles[particleCount] = swap;
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}
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public void Update(float deltaTime)
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{
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for (int i = 0; i < particleCount; i++)
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{
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if (!particles[i].Update(deltaTime)) RemoveParticle(i);
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}
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}
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public void Draw(SpriteBatch spriteBatch, bool inWater)
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{
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ParticlePrefab.DrawTargetType drawTarget = inWater ? ParticlePrefab.DrawTargetType.Water : ParticlePrefab.DrawTargetType.Air;
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for (int i = 0; i < particleCount; i++)
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{
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if (!particles[i].DrawTarget.HasFlag(drawTarget)) continue;
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particles[i].Draw(spriteBatch);
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}
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}
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}
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}
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