---- vanilla NML ----

switch (FEAT_ROADVEHS, SELF, acton_switch_loading_speed_by_cargo_0, cargo_classes & bitmask(CC_MAIL, CC_ARMOURED)) {
    bitmask(CC_MAIL): return 5;
    bitmask(CC_ARMOURED): return 5;
    return 3;
}

switch (FEAT_ROADVEHS, SELF, acton_switch_loading_speed_by_cargo_1, cargo_classes & bitmask(CC_MAIL, CC_ARMOURED)) {
    bitmask(CC_MAIL): return 7;
    bitmask(CC_ARMOURED): return 7;
    return 4;
}

switch (FEAT_ROADVEHS, SELF, acton_switch_loading_speed_by_cargo_2, cargo_classes & bitmask(CC_MAIL, CC_ARMOURED)) {
    bitmask(CC_MAIL): return 9;
    bitmask(CC_ARMOURED): return 9;
    return 5;
}

switch (FEAT_ROADVEHS, SELF, acton_switch_loading_speed, param_adjust_vehicle_capacity) {
    0: acton_switch_loading_speed_by_cargo_0;
    1: acton_switch_loading_speed_by_cargo_1;
    2: acton_switch_loading_speed_by_cargo_2;
}

switch (FEAT_ROADVEHS, SELF, acton_create_visual_effect, 0) {
    return 0;
}

item(FEAT_ROADVEHS, acton, 600) {
    property {
        name:                           string(STR_NAME_ACTON, string(STR_NAME_SUFFIX_COACH));
        cargo_capacity:                 27;
        sprite_id:                      SPRITE_ID_NEW_ROADVEH; //enable new graphics - nml constant
        introduction_date:              date(1990,01,01); // consist just supplies intro year - openttd randomises intro dates a bit anyway
        power:                          360hp;
        speed:                          90mph;
        weight:                         8.0ton;
        tractive_effort_coefficient:    0.7;
        cost_factor:                    44.3;
        running_cost_base:              RUNNING_COST_ROADVEH;
        running_cost_factor:            88.6;
        model_life:                     VEHICLE_NEVER_EXPIRES;
        vehicle_life:                   40;
        reliability_decay:              20; // default value
        retire_early:                   -10;
        sound_effect:                   SOUND_BUS_START_PULL_AWAY;
        refit_cost:                     0; // this needs to be 0 if we want autorefit without using cb
        refittable_cargo_classes:       bitmask(CC_PASSENGERS);
        non_refittable_cargo_classes:   bitmask(); // don't set non-refittable classes, increases likelihood of breaking cargo support
        cargo_allow_refit:              [];
        cargo_disallow_refit:           [];
        default_cargo_type:             PASS;
        cargo_age_period:               370;
        misc_flags:                     bitmask(ROADVEH_FLAG_2CC,ROADVEH_FLAG_AUTOREFIT); // nml constants
        length:                         7;
        effect_spawn_model:             EFFECT_SPAWN_MODEL_DIESEL;
    }
    graphics {
        cargo_capacity:                 acton_switch_cargo_capacity;
        purchase_cargo_capacity:        acton_switch_cargo_capacity;
        loading_speed:                  acton_switch_loading_speed;
        default:                        acton_switch_graphics;
        purchase:                       acton_sg_purchase;
        create_effect:                  acton_create_visual_effect;
    }
}

if (param[1]==0) {
    item(FEAT_ROADVEHS, acton, 600) {
        property {
            climates_available:             ALL_CLIMATES;
        }
    }
}


---- some form of scoping ----

scope(FEAT_ROADVEHS, acton, 600) {
    switch (SELF, switch_loading_speed_by_cargo_0, cargo_classes & bitmask(CC_MAIL, CC_ARMOURED)) {
        bitmask(CC_MAIL): return 5;
        bitmask(CC_ARMOURED): return 5;
        return 3;
    }

    switch (SELF, switch_loading_speed_by_cargo_1, cargo_classes & bitmask(CC_MAIL, CC_ARMOURED)) {
        bitmask(CC_MAIL): return 7;
        bitmask(CC_ARMOURED): return 7;
        return 4;
    }

    switch (SELF, switch_loading_speed_by_cargo_2, cargo_classes & bitmask(CC_MAIL, CC_ARMOURED)) {
        bitmask(CC_MAIL): return 9;
        bitmask(CC_ARMOURED): return 9;
        return 5;
    }

    switch (SELF, switch_loading_speed, param_adjust_vehicle_capacity) {
        0: switch_loading_speed_by_cargo_0;
        1: switch_loading_speed_by_cargo_1;
        2: switch_loading_speed_by_cargo_2;
    }

    switch (SELF, create_visual_effect, 0) {
        return 0;
    }

    property {
        name:                           string(STR_NAME_ACTON, string(STR_NAME_SUFFIX_COACH));
        cargo_capacity:                 27;
        sprite_id:                      SPRITE_ID_NEW_ROADVEH; //enable new graphics - nml constant
        introduction_date:              date(1990,01,01); // consist just supplies intro year - openttd randomises intro dates a bit anyway
        power:                          360hp;
        speed:                          90mph;
        weight:                         8.0ton;
        tractive_effort_coefficient:    0.7;
        cost_factor:                    44.3;
        running_cost_base:              RUNNING_COST_ROADVEH;
        running_cost_factor:            88.6;
        model_life:                     VEHICLE_NEVER_EXPIRES;
        vehicle_life:                   40;
        reliability_decay:              20; // default value
        retire_early:                   -10;
        sound_effect:                   SOUND_BUS_START_PULL_AWAY;
        refit_cost:                     0; // this needs to be 0 if we want autorefit without using cb
        refittable_cargo_classes:       bitmask(CC_PASSENGERS);
        non_refittable_cargo_classes:   bitmask(); // don't set non-refittable classes, increases likelihood of breaking cargo support
        cargo_allow_refit:              [];
        cargo_disallow_refit:           [];
        default_cargo_type:             PASS;
        cargo_age_period:               370;
        misc_flags:                     bitmask(ROADVEH_FLAG_2CC,ROADVEH_FLAG_AUTOREFIT); // nml constants
        length:                         7;
        effect_spawn_model:             EFFECT_SPAWN_MODEL_DIESEL;
    }
    if (param[1]==0) {
        property {
            climates_available:             ALL_CLIMATES;
        }
    }
    graphics {
        cargo_capacity:                 switch_cargo_capacity;
        purchase_cargo_capacity:        switch_cargo_capacity;
        loading_speed:                  switch_loading_speed;
        default:                        switch_graphics;
        purchase:                       sg_purchase;
        create_effect:                  create_visual_effect;
    }

} // end scope