1 package com.badlogic.gdx.graphics.g3d.particles; 2 3 import java.util.Arrays; 4 5 import com.badlogic.gdx.graphics.g3d.ModelInstance; 6 import com.badlogic.gdx.graphics.g3d.particles.ParallelArray.ChannelDescriptor; 7 import com.badlogic.gdx.graphics.g3d.particles.ParallelArray.ChannelInitializer; 8 import com.badlogic.gdx.graphics.g3d.particles.ParallelArray.FloatChannel; 9 10 /** This contains all the definitions of particle related channels and channel initializers. 11 * It is also used by the {@link ParticleController} to handle temporary channels allocated by influencers. 12 * @author inferno */ 13 public class ParticleChannels { 14 private static int currentGlobalId; newGlobalId()15 public static int newGlobalId(){ 16 return currentGlobalId++; 17 } 18 19 //Initializers 20 public static class TextureRegionInitializer implements ChannelInitializer<FloatChannel>{ 21 private static TextureRegionInitializer instance; get()22 public static TextureRegionInitializer get(){ 23 if(instance == null) 24 instance = new TextureRegionInitializer(); 25 return instance; 26 } 27 28 @Override init(FloatChannel channel)29 public void init (FloatChannel channel) { 30 for(int i=0, c = channel.data.length; i < c; i+= channel.strideSize){ 31 channel.data[i + ParticleChannels.UOffset] = 0; 32 channel.data[i + ParticleChannels.VOffset] = 0; 33 channel.data[i + ParticleChannels.U2Offset] = 1; 34 channel.data[i + ParticleChannels.V2Offset] = 1; 35 channel.data[i + ParticleChannels.HalfWidthOffset] = 0.5f; 36 channel.data[i + ParticleChannels.HalfHeightOffset] = 0.5f; 37 } 38 } 39 } 40 41 public static class ColorInitializer implements ChannelInitializer<FloatChannel>{ 42 private static ColorInitializer instance; get()43 public static ColorInitializer get(){ 44 if(instance == null) 45 instance = new ColorInitializer(); 46 return instance; 47 } 48 @Override init(FloatChannel channel)49 public void init (FloatChannel channel) { 50 Arrays.fill(channel.data, 0, channel.data.length, 1); 51 } 52 } 53 54 public static class ScaleInitializer implements ChannelInitializer<FloatChannel>{ 55 private static ScaleInitializer instance; get()56 public static ScaleInitializer get(){ 57 if(instance == null) 58 instance = new ScaleInitializer(); 59 return instance; 60 } 61 @Override init(FloatChannel channel)62 public void init (FloatChannel channel) { 63 Arrays.fill(channel.data, 0, channel.data.length, 1); 64 } 65 } 66 67 public static class Rotation2dInitializer implements ChannelInitializer<FloatChannel>{ 68 private static Rotation2dInitializer instance; get()69 public static Rotation2dInitializer get(){ 70 if(instance == null) 71 instance = new Rotation2dInitializer(); 72 return instance; 73 } 74 @Override init(FloatChannel channel)75 public void init (FloatChannel channel) { 76 for(int i=0, c = channel.data.length; i < c; i+= channel.strideSize){ 77 channel.data[i + ParticleChannels.CosineOffset] = 1; 78 channel.data[i + ParticleChannels.SineOffset] = 0; 79 } 80 } 81 } 82 83 public static class Rotation3dInitializer implements ChannelInitializer<FloatChannel>{ 84 private static Rotation3dInitializer instance; get()85 public static Rotation3dInitializer get(){ 86 if(instance == null) 87 instance = new Rotation3dInitializer(); 88 return instance; 89 } 90 @Override init(FloatChannel channel)91 public void init (FloatChannel channel) { 92 for(int i=0, c = channel.data.length; i < c; i+= channel.strideSize){ 93 channel.data[i + ParticleChannels.XOffset] = 94 channel.data[i + ParticleChannels.YOffset] = 95 channel.data[i + ParticleChannels.ZOffset] = 0; 96 channel.data[i + ParticleChannels.WOffset] = 1; 97 } 98 } 99 } 100 101 //Channels 102 /** Channels of common use like position, life, color, etc...*/ 103 public static final ChannelDescriptor Life = new ChannelDescriptor(newGlobalId(), float.class, 3); 104 public static final ChannelDescriptor Position = new ChannelDescriptor(newGlobalId(), float.class, 3); //gl units 105 public static final ChannelDescriptor PreviousPosition = new ChannelDescriptor(newGlobalId(), float.class, 3); 106 public static final ChannelDescriptor Color = new ChannelDescriptor(newGlobalId(), float.class, 4); 107 public static final ChannelDescriptor TextureRegion = new ChannelDescriptor(newGlobalId(), float.class, 6); 108 public static final ChannelDescriptor Rotation2D = new ChannelDescriptor(newGlobalId(), float.class, 2); 109 public static final ChannelDescriptor Rotation3D = new ChannelDescriptor(newGlobalId(), float.class, 4); 110 public static final ChannelDescriptor Scale = new ChannelDescriptor(newGlobalId(), float.class, 1); 111 public static final ChannelDescriptor ModelInstance = new ChannelDescriptor(newGlobalId(), ModelInstance.class, 1); 112 public static final ChannelDescriptor ParticleController = new ChannelDescriptor(newGlobalId(), ParticleController.class, 1); 113 public static final ChannelDescriptor Acceleration = new ChannelDescriptor(newGlobalId(), float.class, 3); //gl units/s2 114 public static final ChannelDescriptor AngularVelocity2D = new ChannelDescriptor(newGlobalId(), float.class, 1); 115 public static final ChannelDescriptor AngularVelocity3D = new ChannelDescriptor(newGlobalId(), float.class, 3); 116 public static final ChannelDescriptor Interpolation = new ChannelDescriptor(-1, float.class, 2); 117 public static final ChannelDescriptor Interpolation4 = new ChannelDescriptor(-1, float.class, 4); 118 public static final ChannelDescriptor Interpolation6 = new ChannelDescriptor(-1, float.class, 6); 119 120 //Offsets 121 /** Offsets to acess a particular value inside a stride of a given channel */ 122 public static final int CurrentLifeOffset = 0, TotalLifeOffset = 1, LifePercentOffset =2; 123 public static final int RedOffset = 0, GreenOffset =1, BlueOffset = 2, AlphaOffset =3; 124 public static final int InterpolationStartOffset = 0, InterpolationDiffOffset =1; 125 public static final int VelocityStrengthStartOffset = 0, VelocityStrengthDiffOffset =1, 126 VelocityThetaStartOffset = 0, VelocityThetaDiffOffset =1, 127 VelocityPhiStartOffset = 2, VelocityPhiDiffOffset =3; 128 public static final int XOffset = 0, YOffset = 1, ZOffset = 2, WOffset = 3; 129 public static final int UOffset = 0, VOffset= 1, U2Offset = 2, V2Offset = 3, 130 HalfWidthOffset = 4, HalfHeightOffset= 5; 131 public static final int CosineOffset = 0, SineOffset= 1; 132 133 private int currentId; 134 ParticleChannels()135 public ParticleChannels(){ 136 resetIds(); 137 } 138 newId()139 public int newId(){ 140 return currentId++; 141 } 142 resetIds()143 protected void resetIds(){ 144 currentId = currentGlobalId; 145 } 146 147 } 148