private final void method1213(int i, int j, int k, int l, float af[], int i1) {
        int j1 = l - j;
        int k1 = k - i;
        int l1 = j1 >= 0 ? j1 : -j1;
        int i2 = j1 / k1;
        int j2 = j;
        int k2 = 0;
        int l2 = j1 >= 0 ? i2 + 1 : i2 - 1;
        l1 -= (i2 >= 0 ? i2 : -i2) * k1;
        af[i] *= aFloatArray2281[j2];
        if (k > i1) {
            k = i1;
        }
        for (int i3 = i + 1; i3 < k; i3++) {
            k2 += l1;
            if (k2 >= k1) {
                k2 -= k1;
                j2 += l2;
            } else {
                j2 += i2;
            }
            af[i3] *= aFloatArray2281[j2];
        }

    }