unity3d粒子缩放

傷城~ 2022-05-27 11:45 202阅读 0赞

using UnityEngine;
    using System.Collections;
    using UnityEditor;
    
    public class ParticleScaler : EditorWindow
    {
    
    
        float scaleMultiplier = 1.0f;
        [MenuItem("ParticleScaler/OpenPanel")]
        static void OpenPanel()
        {
            var win = EditorWindow.GetWindow<ParticleScaler>();
            win.minSize = new Vector2(340, 110);
        }
    
        void OnGUI()
        {
            EditorGUILayout.LabelField("Particle Scale Tool", EditorStyles.boldLabel);
    
            string selectedParticleString = "Select a particle or weather system";
            if (Selection.gameObjects.Length == 1)
                selectedParticleString = "Selected Particle : " + Selection.gameObjects[0].name;
            else if (Selection.gameObjects.Length > 1)
                selectedParticleString = "Selected Particle : " + Selection.gameObjects.Length + " particles selected";
            EditorGUILayout.LabelField(selectedParticleString, EditorStyles.miniLabel);
            EditorGUILayout.Space();
            scaleMultiplier = EditorGUILayout.Slider("Scale Multiplier :", scaleMultiplier, 0.1f, 5.0f);
    
            if (GUILayout.Button("Scale", EditorStyles.miniButton))
            {
                foreach (GameObject gameObj in Selection.gameObjects)
                {
                    ParticleSystem[] selectedParticles;
                    selectedParticles = gameObj.GetComponentsInChildren<ParticleSystem > ();
                    foreach (ParticleSystem thisParticle in selectedParticles)
                    {
                        thisParticle.Stop();
                        scaleParticle(gameObj, thisParticle);
                        thisParticle.Play();
                    }
                }
            }
    
            EditorGUILayout.BeginHorizontal();
            if (GUILayout.Button("Play", EditorStyles.miniButtonLeft))
            {
                playParticles();
            }
            if (GUILayout.Button("Pause", EditorStyles.miniButtonMid))
            {
                pauseParticles();
            }
            if (GUILayout.Button("Stop", EditorStyles.miniButtonMid))
            {
                stopParticles();
            }
            if (GUILayout.Button("Clear", EditorStyles.miniButtonRight))
            {
                clearParticles();
            }
            EditorGUILayout.EndHorizontal();
        }
    
        void playParticles()
        {
            foreach (GameObject gameObj in Selection.gameObjects)
            {
                ParticleSystem[] selectedParticles;
                selectedParticles = gameObj.GetComponentsInChildren< ParticleSystem > ();
                foreach (ParticleSystem thisParticle in selectedParticles)
                {
                    thisParticle.Play();
                }
            }
        }
    
        void pauseParticles()
        {
            foreach (GameObject gameObj in Selection.gameObjects)
            {
                ParticleSystem[] selectedParticles;
                selectedParticles = gameObj.GetComponentsInChildren< ParticleSystem >();
                foreach (ParticleSystem thisParticle in selectedParticles)
                {
                    thisParticle.Pause();
                }
            }
        }
    
        void stopParticles()
        {
            foreach (GameObject gameObj in Selection.gameObjects)
            {
                ParticleSystem[] selectedParticles;
                selectedParticles = gameObj.GetComponentsInChildren< ParticleSystem >();
                foreach (ParticleSystem thisParticle in selectedParticles)
                {
                    thisParticle.Pause();
                    thisParticle.Stop();
                }
            }
        }
    
        void clearParticles()
        {
            foreach (GameObject gameObj in Selection.gameObjects)
            {
                ParticleSystem[] selectedParticles;
                selectedParticles = gameObj.GetComponentsInChildren< ParticleSystem >();
                foreach (ParticleSystem thisParticle in selectedParticles)
                {
                    thisParticle.Stop();
                    thisParticle.Clear();
                }
            }
        }
    
        void scaleParticle(GameObject _gameObj, ParticleSystem _thisParticle)
        {
            if (_gameObj != _thisParticle.gameObject)
            {
                _thisParticle.transform.localPosition *= scaleMultiplier;
            }
    
            _thisParticle.startSize *= scaleMultiplier;
            _thisParticle.gravityModifier *= scaleMultiplier;
            _thisParticle.startSpeed *= scaleMultiplier;
    
            SerializedObject serObj = new SerializedObject(_thisParticle);
            serObj.FindProperty("ShapeModule.boxX").floatValue *= scaleMultiplier;
            serObj.FindProperty("ShapeModule.boxY").floatValue *= scaleMultiplier;
            serObj.FindProperty("ShapeModule.boxZ").floatValue *= scaleMultiplier;
            serObj.FindProperty("ShapeModule.radius").floatValue *= scaleMultiplier;
    
            scaleACV(serObj.FindProperty("VelocityModule.x.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("VelocityModule.x.maxCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("VelocityModule.y.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("VelocityModule.y.maxCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("VelocityModule.z.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("VelocityModule.z.maxCurve").animationCurveValue);
    
            serObj.FindProperty("ClampVelocityModule.x.scalar").floatValue *= scaleMultiplier;
            serObj.FindProperty("ClampVelocityModule.y.scalar").floatValue *= scaleMultiplier;
            serObj.FindProperty("ClampVelocityModule.z.scalar").floatValue *= scaleMultiplier;
            serObj.FindProperty("ClampVelocityModule.magnitude.scalar").floatValue *= scaleMultiplier;
    
            scaleACV(serObj.FindProperty("ClampVelocityModule.x.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ClampVelocityModule.x.maxCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ClampVelocityModule.y.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ClampVelocityModule.y.maxCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ClampVelocityModule.z.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ClampVelocityModule.z.maxCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ClampVelocityModule.magnitude.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ClampVelocityModule.magnitude.maxCurve").animationCurveValue);
    
            scaleACV(serObj.FindProperty("ForceModule.x.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ForceModule.x.maxCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ForceModule.y.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ForceModule.y.maxCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ForceModule.z.minCurve").animationCurveValue);
            scaleACV(serObj.FindProperty("ForceModule.z.maxCurve").animationCurveValue);
    
            serObj.FindProperty("VelocityModule.x.scalar").floatValue *= scaleMultiplier;
            serObj.FindProperty("VelocityModule.y.scalar").floatValue *= scaleMultiplier;
            serObj.FindProperty("VelocityModule.z.scalar").floatValue *= scaleMultiplier;
    
            serObj.FindProperty("ForceModule.x.scalar").floatValue *= scaleMultiplier;
            serObj.FindProperty("ForceModule.y.scalar").floatValue *= scaleMultiplier;
            serObj.FindProperty("ForceModule.z.scalar").floatValue *= scaleMultiplier;
    
            serObj.ApplyModifiedProperties();
        }
    
        void scaleACV(AnimationCurve curve)
        {
            for (int i = 0; i < curve.keys.Length; i++)
            {
                curve.keys[i].value *= scaleMultiplier;
            }
        }
    }

面板中Scale Multiplier填入倍数，例如0.5即是缩小一倍，大于1即是放大  
![这里写图片描述][70]

[70]: /images/20220527/f8204d6034f04d0b8c52b49ebf5d914f.png