openmohaa/code/fgame/VehicleSoundEntity.cpp

/*
===========================================================================
Copyright (C) 2015 the OpenMoHAA team

This file is part of OpenMoHAA source code.

OpenMoHAA source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.

OpenMoHAA source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with OpenMoHAA source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/
// VehicleSoundENtity.cpp : Make sounds for vehicles

#include "VehicleSoundEntity.h"
#include "weapon.h"
#include "vehicle.h"

Event EV_VehicleSoundEntity_PostSpawn
(
    "vehiclesoundentity_post",
    EV_DEFAULT,
    NULL,
    NULL,
    "PostSpawn of a Vehicle Sound Entity"
);

Event EV_VehicleSoundEntity_UpdateTraces
(
    "vehiclesoudnentity_updatetraces",
    EV_DEFAULT,
    NULL,
    NULL,
    "Updates the traces of a Vehicle Sound Entity"
);

CLASS_DECLARATION(Entity, VehicleSoundEntity, NULL) {
    {&EV_VehicleSoundEntity_PostSpawn,    &VehicleSoundEntity::EventPostSpawn   },
    {&EV_VehicleSoundEntity_UpdateTraces, &VehicleSoundEntity::EventUpdateTraces},
    {NULL,                                NULL                                  }
};

VehicleSoundEntity::VehicleSoundEntity()
{
    if (LoadingSavegame) {
        return;
    }

    gi.Error(ERR_DROP, "VehicleSoundEntity Created with no parameters!\n");
}

VehicleSoundEntity::VehicleSoundEntity(Vehicle *owner)
{
    m_pVehicle           = owner;
    m_bDoSoundStuff      = false;
    m_iTraceSurfaceFlags = 0;

    PostEvent(EV_VehicleSoundEntity_PostSpawn, EV_POSTSPAWN);
}

void VehicleSoundEntity::Start(void)
{
    m_bDoSoundStuff = true;
}

void VehicleSoundEntity::Stop(void)
{
    m_bDoSoundStuff = false;
}

void VehicleSoundEntity::Think(void)
{
    DoSoundStuff();
}

void VehicleSoundEntity::EventPostSpawn(Event *ev)
{
    setModel("models/vehicles/vehiclesoundentity.tik");

    PostEvent(EV_VehicleSoundEntity_UpdateTraces, 1.0f);
    flags |= FL_THINK;
}

void VehicleSoundEntity::EventUpdateTraces(Event *ev)
{
    if (m_bDoSoundStuff) {
        m_pVehicle->SetSlotsNonSolid();

        trace_t trace = G_Trace(
            origin,
            vec3_origin,
            vec3_origin,
            Vector(origin[0], origin[1], origin[2] - 256.0f),
            m_pVehicle->edict,
            MASK_SOUND,
            qfalse,
            "VehicleSoundEntity::DoSoundStuff"
        );

        if (trace.fraction >= 1.0f) {
            m_iTraceSurfaceFlags = 0;
        } else {
            m_iTraceSurfaceFlags = trace.surfaceFlags;
        }

        m_pVehicle->SetSlotsSolid();
    }

    PostEvent(EV_VehicleSoundEntity_UpdateTraces, 1.0f);
}

void VehicleSoundEntity::DoSoundStuff(void)
{
    float pitch;

    if (!m_bDoSoundStuff) {
        StopLoopSound();
        return;
    }

    pitch = (velocity.length() - m_pVehicle->m_fSoundMinSpeed)
          / (m_pVehicle->m_fSoundMaxSpeed - m_pVehicle->m_fSoundMinSpeed);
    if (pitch > 1.0f) {
        pitch = 1.0f;
    } else if (pitch < 0.0f) {
        pitch = 0.0f;
    }

    pitch *= m_pVehicle->m_fSoundMinPitch + (m_pVehicle->m_fSoundMaxPitch - m_pVehicle->m_fSoundMinPitch);

    if (m_iTraceSurfaceFlags & SURF_DIRT) {
        LoopSound(m_pVehicle->m_sSoundSet + "tread_snd_dirt", -1.0f, -1.0f, -1.0f, pitch);
    } else if (m_iTraceSurfaceFlags & SURF_GRASS) {
        LoopSound(m_pVehicle->m_sSoundSet + "tread_snd_grass", -1.0f, -1.0f, -1.0f, pitch);
    } else if (m_iTraceSurfaceFlags & SURF_WOOD) {
        LoopSound(m_pVehicle->m_sSoundSet + "tread_snd_wood", -1.0f, -1.0f, -1.0f, pitch);
    } else if (m_iTraceSurfaceFlags & SURF_MUD) {
        LoopSound(m_pVehicle->m_sSoundSet + "tread_snd_mud", -1.0f, -1.0f, -1.0f, pitch);
    } else if (m_iTraceSurfaceFlags & (SURF_GRAVEL | SURF_ROCK) || m_iTraceSurfaceFlags == 0) {
        LoopSound(m_pVehicle->m_sSoundSet + "tread_snd_stone", -1.0f, -1.0f, -1.0f, pitch);
    } else {
        StopLoopSound();
    }
}