// 00ab8f10: one hit-liquid event per positive damage channel, in native order.
void projectile_hit_liquid(int k, float projectile, int tb, vec4 adds, float scale, vec2 hit, vec2 impulse, uint seed) {
    const Ent v = ents[k];
    const vec4 a = ftf(tb + 12), b = ftf(tb + 13), c = ftf(tb + 14);
    const float channel[13] = float[13](projectile * v.ex9.x, (a.y + adds.x) * v.ex12.x,
        c.w * v.ex9.y, a.z * v.ex9.z, a.x * v.ex9.w, b.y * v.ex12.y,
        b.x * v.ex12.z, (a.w + adds.y) * v.ex12.w, c.x * v.ex13.x,
        b.z * v.ex13.z, b.w * v.ex13.w, c.y * v.ex14.y, c.z * v.ex14.z);
    const vec2 factors = bloodProjectile[tb / TYPE_STRIDE].xy;
    const int fx = (fti(tb + 11).y >> 4) & 15;
    for (int i = 0; i < 13; ++i) {
        if (i == 8) continue; // Healing is a negative damage channel.
        hit_liquid(k, channel[i] * scale, hit, impulse, factors.x, factors.y, fx, hash3(seed, uint(i), 411u));
    }
}