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Язык

Обучение
Scripting
Droplet Decals

Droplet Decals

Проверено с версией:: 5.5

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Сложность: Средняя

In this live training session you will learn how to control particle systems at runtime via script, how to use collision messages from particles to drive gameplay and how to render decal style effects using particles.

Droplet Decals

Средняя Scripting

Download the assets used in this training here

ParticleLauncher

Code snippet

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ParticleLauncher : MonoBehaviour {

    public ParticleSystem particleLauncher;
    public ParticleSystem splatterParticles;
    public Gradient particleColorGradient;
    public ParticleDecalPool splatDecalPool;

    List<ParticleCollisionEvent> collisionEvents;

    void Start () 
    {
        collisionEvents = new List<ParticleCollisionEvent> ();
    }

    void OnParticleCollision(GameObject other)
    {
        ParticlePhysicsExtensions.GetCollisionEvents (particleLauncher, other, collisionEvents);

        for (int i = 0; i < collisionEvents.Count; i++) 
        {
            splatDecalPool.ParticleHit (collisionEvents [i], particleColorGradient);
            EmitAtLocation (collisionEvents[i]);
        }

    }

    void EmitAtLocation(ParticleCollisionEvent particleCollisionEvent)
    {
        splatterParticles.transform.position = particleCollisionEvent.intersection;
        splatterParticles.transform.rotation = Quaternion.LookRotation (particleCollisionEvent.normal);
        ParticleSystem.MainModule psMain = splatterParticles.main;
        psMain.startColor = particleColorGradient.Evaluate (Random.Range (0f, 1f));

        splatterParticles.Emit (1);
    }
        
    void Update () 
    {
        if (Input.GetButton ("Fire1")) 
        {
            ParticleSystem.MainModule psMain = particleLauncher.main;
            psMain.startColor = particleColorGradient.Evaluate (Random.Range (0f, 1f));
            particleLauncher.Emit (1);
        }

    }
}

ParticleDecalData

Code snippet

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ParticleDecalData 
{
    public Vector3 position;
    public float size;
    public Vector3 rotation;
    public Color color;

}

ParticleDecalPool

Code snippet

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ParticleDecalPool : MonoBehaviour {

    public int maxDecals = 100;
    public float decalSizeMin = .5f;
    public float decalSizeMax = 1.5f;

    private ParticleSystem decalParticleSystem;
    private int particleDecalDataIndex;
    private ParticleDecalData[] particleData;
    private ParticleSystem.Particle[] particles;

    void Start () 
    {
        decalParticleSystem = GetComponent<ParticleSystem> ();
        particles = new ParticleSystem.Particle[maxDecals];
        particleData = new ParticleDecalData[maxDecals];
        for (int i = 0; i < maxDecals; i++) 
        {
            particleData [i] = new ParticleDecalData ();    
        }
    }

    public void ParticleHit(ParticleCollisionEvent particleCollisionEvent, Gradient colorGradient)
    {
        SetParticleData (particleCollisionEvent, colorGradient);
        DisplayParticles ();
    }

    void SetParticleData(ParticleCollisionEvent particleCollisionEvent, Gradient colorGradient)
    {
        if (particleDecalDataIndex >= maxDecals) 
        {
            particleDecalDataIndex = 0;
        }
            
        particleData [particleDecalDataIndex].position = particleCollisionEvent.intersection;
        Vector3 particleRotationEuler = Quaternion.LookRotation (particleCollisionEvent.normal).eulerAngles;
        particleRotationEuler.z = Random.Range (0, 360);
        particleData [particleDecalDataIndex].rotation = particleRotationEuler;
        particleData [particleDecalDataIndex].size = Random.Range (decalSizeMin, decalSizeMax);
        particleData [particleDecalDataIndex].color = colorGradient.Evaluate (Random.Range (0f, 1f));

        particleDecalDataIndex++;
    }

    void DisplayParticles()
    {
        for (int i = 0; i < particleData.Length; i++) 
        {
            particles [i].position = particleData [i].position;
            particles [i].rotation3D = particleData [i].rotation;
            particles [i].startSize = particleData [i].size;
            particles [i].startColor = particleData [i].color;
        }

        decalParticleSystem.SetParticles (particles, particles.Length);
    }
}

SplatOnCollision

Code snippet

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class SplatOnCollision : MonoBehaviour {

    public ParticleSystem particleLauncher;
    public Gradient particleColorGradient;
    public ParticleDecalPool dropletDecalPool;

    List<ParticleCollisionEvent> collisionEvents;


    void Start () 
    {
        collisionEvents = new List<ParticleCollisionEvent> ();
    }

    void OnParticleCollision(GameObject other)
    {
        int numCollisionEvents = ParticlePhysicsExtensions.GetCollisionEvents (particleLauncher, other, collisionEvents);

        int i = 0;
        while (i < numCollisionEvents) 
        {
            dropletDecalPool.ParticleHit(collisionEvents[i], particleColorGradient);
            i++;
        }

    }

}

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Unity ID

Droplet Decals

Проверено с версией:: 5.5

-

Сложность: Средняя

Droplet Decals

ParticleLauncher

Code snippet

ParticleDecalData

Code snippet

ParticleDecalPool

Code snippet

SplatOnCollision

Code snippet

Scripting

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