枚举 Particle2DVertex

vec4; x: direction x, y: direction y, z: position x, w: position y

vec4 x: color random, y: velocity x random, z: velocity y random, w: rotation random

vec4 x: SizeOverLifetime x random, y: SizeOverLifetime y random, z: texture sheet animation frame random,

vec4; x: sprite rotation cos, y: sprite rotation sin, z: sprite scale x, w: sprite scale y

vec4; x: texture sheet start frame index y: texture sheet frame count z: texture sheet Row index

vec4; x: size x, y: size y, z: emit time, w: lifetime

vec4; x: direction speed, y: space, z: mesh rot cos, w: mesh rot sin

vec4 start color

vec4 x: sprite translate x, y: sprite translate y, z: gravity X, w: gravity Y