Clazz.declarePackage("JM.FF");
Clazz.load(["JM.FF.Calculation"], "JM.FF.MMFFVDWCalc", null, function(){
var c$ = Clazz.declareType(JM.FF, "MMFFVDWCalc", JM.FF.Calculation);
Clazz.overrideMethod(c$, "setData", 
function(calc, ia, ib, dd){
this.a = this.calcs.minAtoms[ia];
this.b = this.calcs.minAtoms[ib];
var dataA = this.calcs.getParameter(this.a.vdwKey);
var dataB = this.calcs.getParameter(this.b.vdwKey);
if (dataA == null || dataB == null) return;
var alpha_a = dataA[0];
var N_a = dataA[1];
var A_a = dataA[2];
var G_a = dataA[3];
var DA_a = Clazz.doubleToInt(dataA[4]);
var alpha_b = dataB[0];
var N_b = dataB[1];
var A_b = dataB[2];
var G_b = dataB[3];
var DA_b = Clazz.doubleToInt(dataB[4]);
var rs_aa = A_a * Math.pow(alpha_a, 0.25);
var rs_bb = A_b * Math.pow(alpha_b, 0.25);
var gamma = (rs_aa - rs_bb) / (rs_aa + rs_bb);
var rs = 0.5 * (rs_aa + rs_bb);
if (DA_a != 68 && DA_b != 68) rs *= (1.0 + 0.2 * (1.0 - Math.exp(-12.0 * gamma * gamma)));
var eps = ((181.16 * G_a * G_b * alpha_a * alpha_b) / (Math.sqrt(alpha_a / N_a) + Math.sqrt(alpha_b / N_b))) * Math.pow(rs, -6.0);
if (DA_a + DA_b == 133) {
rs *= 0.8;
eps *= 0.5;
}calc.addLast( Clazz.newArray(-1, [ Clazz.newIntArray(-1, [ia, ib]),  Clazz.newDoubleArray(-1, [rs, eps])]));
}, "JU.Lst,~N,~N,~N");
Clazz.overrideMethod(c$, "compute", 
function(dataIn){
this.getPointers(dataIn);
this.calcs.setPairVariables(this);
var rs = this.dData[0];
var eps = this.dData[1];
var r_rs = this.rab / rs;
var f1 = 1.07 / (r_rs + 0.07);
var f2 = 1.12 / (Math.pow(r_rs, 7) + 0.12);
this.energy = eps * Math.pow(f1, 7) * (f2 - 2);
if (this.calcs.gradients) {
this.dE = -7 * eps * Math.pow(f1, 7) / rs * (f1 / 1.07 * (f2 - 2) + f2 * f2 * Math.pow(r_rs, 6));
this.calcs.addForces(this, 2);
}if (this.calcs.logging && Math.abs(this.energy) > 0.1) this.calcs.appendLogData(this.calcs.getDebugLine(5, this));
return this.energy;
}, "~A");
});
;//5.0.1-v7 Mon Aug 17 10:07:10 MDT 2026
