export const DT = 1 / 60 ; export const TOUCH_FORCE_RADIUS = 20 / 1200 ; export const TOUCH_FORCE_SCALE = 0.3 ; export const MIN_TOUCH_FORCE_RADIUS_PX = 15 ; export const MAX_TOUCH_FORCE_RADIUS_PX = 35 ; export const PRESSURE_CALC_ALPHA = - 1 ; export const PRESSURE_CALC_BETA = 0.25 ; export const PARTICLE_DENSITY = 0.1 ; export const MAX_NUM_PARTICLES = 130000 ; export const PARTICLE_LIFETIME = 1000 ; export const TRAIL_LIFETIME = 100 ; export const NUM_RENDER_STEPS = 3 ;