e_event_actorshoot.cpp

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/*
Copyright (C) 2002-2025 UFO: Alien Invasion.
 
This program 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.
 
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
 
#include "../../../../client.h"
#include "../../../cl_localentity.h"
#include "../../../../renderer/r_mesh.h"
#include "../../../../renderer/r_mesh_anim.h"
#include "e_event_actorshoot.h"

int CL_ActorDoShootTime (const eventRegister_t* self, dbuffer* msg, eventTiming_t* eventTiming)
{
    int flags, dummy;
    int objIdx, surfaceFlags;
    int weap_fds_idx, fd_idx;
    shoot_types_t shootType;
    vec3_t muzzle, impact;
    int eventTime = eventTiming->shootTime;
 
    /* read data */
    NET_ReadFormat(msg, self->formatString, &dummy, &dummy, &dummy, &objIdx, &weap_fds_idx, &fd_idx, &shootType, &flags,
            &surfaceFlags, &muzzle, &impact, &dummy);
 
    const objDef_t* obj = INVSH_GetItemByIDX(objIdx);
    const fireDef_t* fd = FIRESH_GetFiredef(obj, weap_fds_idx, fd_idx);
 
    if (!(flags & SF_BOUNCED)) {
        /* shooting */
        if (fd->speed > 0.0 && !CL_OutsideMap(impact, UNIT_SIZE * 10)) {
            eventTiming->impactTime = eventTiming->shootTime + 1000 * VectorDist(muzzle, impact) / fd->speed;
        } else {
            eventTiming->impactTime = eventTiming->shootTime;
        }
        if (!cls.isOurRound())
            eventTiming->nextTime = CL_GetNextTime(self, eventTiming, eventTiming->impactTime + 1400);
        else
            eventTiming->nextTime = CL_GetNextTime(self, eventTiming, eventTiming->impactTime + 400);
        if (fd->delayBetweenShots > 0.0)
            eventTiming->shootTime += 1000 / fd->delayBetweenShots;
    } else {
        /* only a bounced shot */
        eventTime = eventTiming->impactTime;
        if (fd->speed > 0.0) {
            eventTiming->impactTime += 1000 * VectorDist(muzzle, impact) / fd->speed;
            eventTiming->nextTime = CL_GetNextTime(self, eventTiming, eventTiming->impactTime);
        }
    }
    eventTiming->parsedDeath = false;
 
    return eventTime;
}

static void CL_ActorGetMuzzle (const le_t* actor, vec3_t muzzle, shoot_types_t shootType)
{
    if (actor == nullptr)
        return;
 
    const Item* weapon;
    const char* tag;
    if (IS_SHOT_RIGHT(shootType)) {
        tag = "tag_rweapon";
        weapon = actor->getRightHandItem();
    } else {
        tag = "tag_lweapon";
        weapon = actor->getLeftHandItem();
    }
 
    if (!weapon || !weapon->def())
        return;
 
    const objDef_t* od = weapon->def();
    const model_t* model = cls.modelPool[od->idx];
    if (!model)
        Com_Error(ERR_DROP, "Model for item %s is not precached", od->id);
 
    /* not every weapon has a muzzle tag assigned */
    if (R_GetTagIndexByName(model, "tag_muzzle") == -1)
        return;
 
    float modifiedMatrix[16];
    if (!R_GetTagMatrix(actor->model1, tag, actor->as.frame, modifiedMatrix))
        Com_Error(ERR_DROP, "Could not find tag %s for actor model %s", tag, actor->model1->name);
 
    float mc[16];
    GLMatrixAssemble(actor->origin, actor->angles, mc);
 
    float matrix[16];
    GLMatrixMultiply(mc, modifiedMatrix, matrix);
 
    R_GetTagMatrix(model, "tag_muzzle", 0, modifiedMatrix);
    GLMatrixMultiply(matrix, modifiedMatrix, mc);
 
    muzzle[0] = mc[12];
    muzzle[1] = mc[13];
    muzzle[2] = mc[14];
}

void CL_ActorDoShoot (const eventRegister_t* self, dbuffer* msg)
{
    vec3_t muzzle, impact;
    int flags, normal, shooterEntnum, victimEntnum;
    int objIdx;
    int first;
    weaponFireDefIndex_t weapFdsIdx;
    fireDefIndex_t fdIdx;
    int surfaceFlags;
    shoot_types_t shootType;
 
    /* read data */
    NET_ReadFormat(msg, self->formatString, &shooterEntnum, &victimEntnum, &first, &objIdx, &weapFdsIdx, &fdIdx, &shootType, &flags, &surfaceFlags, &muzzle, &impact, &normal);
 
    le_t* leVictim;
    if (victimEntnum != SKIP_LOCAL_ENTITY) {
        leVictim = LE_Get(victimEntnum);
        if (!leVictim)
            LE_NotFoundError(victimEntnum);
    } else {
        leVictim = nullptr;
    }
 
    /* get shooter le */
    le_t* leShooter = LE_Get(shooterEntnum);
 
    /* get the fire def */
    const objDef_t* obj = INVSH_GetItemByIDX(objIdx);
    const fireDef_t* fd = FIRESH_GetFiredef(obj, weapFdsIdx, fdIdx);
 
    CL_ActorGetMuzzle(leShooter, muzzle, shootType);
 
    /* add effect le */
    LE_AddProjectile(fd, flags, muzzle, impact, normal, leVictim);
 
    /* start the sound */
    if ((first || !fd->soundOnce) && fd->fireSound != nullptr && !(flags & SF_BOUNCED))
        S_LoadAndPlaySample(fd->fireSound, muzzle, fd->fireAttenuation, SND_VOLUME_WEAPONS);
 
    /* do actor related stuff */
    if (!leShooter)
        return; /* maybe hidden or inuse is false? */
 
    if (!LE_IsActor(leShooter))
        Com_Error(ERR_DROP, "Can't shoot, LE not an actor (type: %i)", leShooter->type);
 
    /* no animations for hidden actors */
    if (leShooter->type == ET_ACTORHIDDEN)
        return;
 
    if (LE_IsDead(leShooter)) {
        Com_DPrintf(DEBUG_CLIENT, "Can't shoot, actor dead or stunned.\n");
        return;
    }
 
    /* Animate - we have to check if it is right or left weapon usage. */
    if (IS_SHOT_RIGHT(shootType)) {
        R_AnimChange(&leShooter->as, leShooter->model1, LE_GetAnim("shoot", leShooter->right, leShooter->left, leShooter->state));
        R_AnimAppend(&leShooter->as, leShooter->model1, LE_GetAnim("stand", leShooter->right, leShooter->left, leShooter->state));
    } else if (IS_SHOT_LEFT(shootType)) {
        R_AnimChange(&leShooter->as, leShooter->model1, LE_GetAnim("shoot", leShooter->left, leShooter->right, leShooter->state));
        R_AnimAppend(&leShooter->as, leShooter->model1, LE_GetAnim("stand", leShooter->left, leShooter->right, leShooter->state));
    } else if (IS_SHOT_HEADGEAR(shootType)) {
        if (fd->irgoggles) {
            leShooter->state |= RF_IRGOGGLESSHOT;
            if (LE_IsSelected(leShooter))
                refdef.rendererFlags |= RDF_IRGOGGLES;
        }
    } else {
        /* no animation for headgear (yet) */
        Com_Error(ERR_DROP, "CL_ActorDoShoot: Invalid shootType given (entnum: %i, shootType: %i).\n", shootType, shooterEntnum);
    }
}