cl_sequence.cpp

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/*
Copyright (C) 2002-2020 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 "cl_sequence.h"
#include "../client.h"
#include "../battlescape/cl_localentity.h"
#include "../battlescape/cl_view.h"
#include "../renderer/r_main.h"
#include "../renderer/r_draw.h"
#include "../renderer/r_misc.h" /* R_PushMatrix, R_PopMatrix */
#include "../renderer/r_mesh_anim.h"
#include "../cl_language.h"
#include "../../shared/parse.h"
#include "../ui/ui_render.h"

#define MAX_DATA_LENGTH 512

struct sequenceContext_s;

typedef int (*sequenceHandler_t) (struct sequenceContext_s* context, const char* name, const char* data);

typedef struct seqCmd_s {
    sequenceHandler_t handler;
    char name[MAX_VAR];
    char data[MAX_DATA_LENGTH];
} seqCmd_t;

typedef struct sequence_s {
    char name[MAX_VAR]; 
    int start;      
    int length;     
} sequence_t;

typedef struct seqCamera_s {
    vec3_t origin;
    vec3_t speed;
    vec3_t angles;
    vec3_t omega;
    float dist;     
    float ddist;    
    float zoom;     
    float dzoom;    
} seqCamera_t;

typedef struct seqEnt_s {
    bool inuse;
    char name[MAX_VAR];
    model_t* model;     
    int skin;           
    vec3_t origin;      
    vec3_t speed;       
    vec3_t angles;      
    vec3_t omega;       
    vec3_t color;
    float alpha;
    char parent[MAX_VAR];   
    char tag[MAX_VAR];      
    animState_t as;         
    entity_t* ep;
} seqEnt_t;

typedef struct seq2D_s {
    bool inuse;         
    char name[MAX_VAR];     
    char* text;         
    char font[MAX_VAR];     
    char image[MAX_VAR];        
    vec2_t pos;         
    vec2_t speed;           
    vec2_t size;            
    vec2_t enlarge;         
    vec4_t color;           
    vec4_t fade;            
    vec4_t bgcolor;         
    align_t align;          
    vec4_t bordercolor;     
    int border;         
    bool inBackground;      
    bool relativePos;       
} seq2D_t;

#define MAX_SEQCMDS     768
#define MAX_SEQUENCES   32
#define MAX_SEQENTS     128
#define MAX_SEQ2DS      128

static sequence_t sequences[MAX_SEQUENCES];
static int numSequences;

static seqCmd_t* seqCmds;
static int numSeqCmds;

typedef struct sequenceContext_s {
    vec2_t pos;
    vec2_t size;

    int time;
    bool endClickLoop;
    int currentCmd;
    int endCmd;

    int animspeed;

    seqCamera_t camera;

    seqEnt_t ents[MAX_SEQENTS];
    int numEnts;

    seq2D_t obj2Ds[MAX_SEQ2DS];
    int numObj2Ds;

} sequenceContext_t;

static const value_t seqCamera_vals[] = {
    {"origin", V_VECTOR, offsetof(seqCamera_t, origin), MEMBER_SIZEOF(seqCamera_t, origin)},
    {"speed", V_VECTOR, offsetof(seqCamera_t, speed), MEMBER_SIZEOF(seqCamera_t, speed)},
    {"angles", V_VECTOR, offsetof(seqCamera_t, angles), MEMBER_SIZEOF(seqCamera_t, angles)},
    {"omega", V_VECTOR, offsetof(seqCamera_t, omega), MEMBER_SIZEOF(seqCamera_t, omega)},
    {"dist", V_FLOAT, offsetof(seqCamera_t, dist), MEMBER_SIZEOF(seqCamera_t, dist)},
    {"ddist", V_FLOAT, offsetof(seqCamera_t, ddist), MEMBER_SIZEOF(seqCamera_t, ddist)},
    {"zoom", V_FLOAT, offsetof(seqCamera_t, zoom), MEMBER_SIZEOF(seqCamera_t, zoom)},
    {"dzoom", V_FLOAT, offsetof(seqCamera_t, dzoom), MEMBER_SIZEOF(seqCamera_t, dzoom)},
    {nullptr, V_NULL, 0, 0}
};

static const value_t seqEnt_vals[] = {
    {"name", V_STRING, offsetof(seqEnt_t, name), 0},
    {"skin", V_INT, offsetof(seqEnt_t, skin), MEMBER_SIZEOF(seqEnt_t, skin)},
    {"alpha", V_FLOAT, offsetof(seqEnt_t, alpha), MEMBER_SIZEOF(seqEnt_t, alpha)},
    {"origin", V_VECTOR, offsetof(seqEnt_t, origin), MEMBER_SIZEOF(seqEnt_t, origin)},
    {"speed", V_VECTOR, offsetof(seqEnt_t, speed), MEMBER_SIZEOF(seqEnt_t, speed)},
    {"angles", V_VECTOR, offsetof(seqEnt_t, angles), MEMBER_SIZEOF(seqEnt_t, angles)},
    {"omega", V_VECTOR, offsetof(seqEnt_t, omega), MEMBER_SIZEOF(seqEnt_t, omega)},
    {"color", V_VECTOR, offsetof(seqEnt_t, color), MEMBER_SIZEOF(seqEnt_t, color)},
    {"parent", V_STRING, offsetof(seqEnt_t, parent), 0},
    {"tag", V_STRING, offsetof(seqEnt_t, tag), 0},
    {nullptr, V_NULL, 0, 0}
};

static const value_t seq2D_vals[] = {
    {"name", V_STRING, offsetof(seq2D_t, name), 0},
    {"text", V_TRANSLATION_STRING, offsetof(seq2D_t, text), 0},
    {"font", V_STRING, offsetof(seq2D_t, font), 0},
    {"image", V_STRING, offsetof(seq2D_t, image), 0},
    {"pos", V_POS, offsetof(seq2D_t, pos), MEMBER_SIZEOF(seq2D_t, pos)},
    {"speed", V_POS, offsetof(seq2D_t, speed), MEMBER_SIZEOF(seq2D_t, speed)},
    {"size", V_POS, offsetof(seq2D_t, size), MEMBER_SIZEOF(seq2D_t, size)},
    {"enlarge", V_POS, offsetof(seq2D_t, enlarge), MEMBER_SIZEOF(seq2D_t, enlarge)},
    {"bgcolor", V_COLOR, offsetof(seq2D_t, bgcolor), MEMBER_SIZEOF(seq2D_t, bgcolor)},
    {"color", V_COLOR, offsetof(seq2D_t, color), MEMBER_SIZEOF(seq2D_t, color)},
    {"fade", V_COLOR, offsetof(seq2D_t, fade), MEMBER_SIZEOF(seq2D_t, fade)},
    {"align", V_ALIGN, offsetof(seq2D_t, align), MEMBER_SIZEOF(seq2D_t, align)},
    {"bordercolor", V_COLOR, offsetof(seq2D_t, bordercolor), MEMBER_SIZEOF(seq2D_t, bordercolor)},
    {"border", V_INT, offsetof(seq2D_t, border), MEMBER_SIZEOF(seq2D_t, border)},
    {"inbackground", V_BOOL, offsetof(seq2D_t, inBackground), MEMBER_SIZEOF(seq2D_t, inBackground)},
    {"relative", V_BOOL, offsetof(seq2D_t, relativePos), MEMBER_SIZEOF(seq2D_t, relativePos)},
    {nullptr, V_NULL, 0, 0}
};

static void SEQ_SetCamera (sequenceContext_t* context)
{
    if (!context->size[0] || !context->size[1])
        return;

    /* advance time */
    VectorMA(context->camera.origin, cls.frametime, context->camera.speed, context->camera.origin);
    VectorMA(context->camera.angles, cls.frametime, context->camera.omega, context->camera.angles);
    context->camera.zoom += cls.frametime * context->camera.dzoom;
    context->camera.dist += cls.frametime * context->camera.ddist;

    /* set camera */
    VectorCopy(context->camera.origin, cl.cam.origin);
    VectorCopy(context->camera.angles, cl.cam.angles);

    AngleVectors(cl.cam.angles, cl.cam.axis[0], cl.cam.axis[1], cl.cam.axis[2]);
    VectorMA(cl.cam.origin, -context->camera.dist, cl.cam.axis[0], cl.cam.camorg);
    cl.cam.zoom = std::max(context->camera.zoom, MIN_ZOOM);
    /* fudge to get isometric and perspective modes looking similar */
    if (cl_isometric->integer)
        cl.cam.zoom /= 1.35;
    CL_ViewCalcFieldOfViewX();
}


static seqEnt_t* SEQ_FindEnt (sequenceContext_t* context, const char* name)
{
    seqEnt_t* se;
    int i;

    for (i = 0, se = context->ents; i < context->numEnts; i++, se++)
        if (se->inuse && Q_streq(se->name, name))
            break;
    if (i < context->numEnts)
        return se;
    return nullptr;
}


static seq2D_t* SEQ_Find2D (sequenceContext_t* context, const char* name)
{
    seq2D_t* s2d;
    int i;

    for (i = 0, s2d = context->obj2Ds; i < context->numObj2Ds; i++, s2d++)
        if (s2d->inuse && Q_streq(s2d->name, name))
            break;
    if (i < context->numObj2Ds)
        return s2d;
    return nullptr;
}

static void SEQ_Render3D (sequenceContext_t* context)
{
    if (context->numEnts == 0)
        return;

    /* set camera */
    SEQ_SetCamera(context);

    refdef.numEntities = 0;
    refdef.mapTiles = cl.mapTiles;

    /* render sequence */
    for (int i = 0; i < context->numEnts; i++) {
        seqEnt_t* se = &context->ents[i];
        if (!se->inuse)
            continue;

        /* advance in time */
        VectorMA(se->origin, cls.frametime, se->speed, se->origin);
        VectorMA(se->angles, cls.frametime, se->omega, se->angles);
        R_AnimRun(&se->as, se->model, context->animspeed * cls.frametime);

        /* add to scene */
        entity_t ent(RF_NONE);
        ent.model = se->model;
        ent.skinnum = se->skin;
        ent.as = se->as;
        ent.alpha = se->alpha;

        R_EntitySetOrigin(&ent, se->origin);
        VectorCopy(se->origin, ent.oldorigin);
        VectorCopy(se->angles, ent.angles);

        if (se->parent && se->tag) {
            seqEnt_t* parent = SEQ_FindEnt(context, se->parent);
            if (parent)
                ent.tagent = parent->ep;
            ent.tagname = se->tag;
        }

        /* add to render list */
        se->ep = R_GetFreeEntity();
        R_AddEntity(&ent);
    }

    refdef.rendererFlags |= RDF_NOWORLDMODEL;

    /* use a relative fixed size */
    viddef.x = context->pos[0];
    viddef.y = context->pos[1];
    viddef.viewWidth = context->size[0];
    viddef.viewHeight = context->size[1];

    /* update refdef */
    CL_ViewUpdateRenderData();

    /* render the world */
    R_PushMatrix();
    R_RenderFrame();
    R_PopMatrix();
}


static void SEQ_Render2D (sequenceContext_t* context, bool backgroundObjects)
{
    int height = 0;

    /* add texts */
    for (int i = 0; i < context->numObj2Ds; i++) {
        seq2D_t* s2d = &context->obj2Ds[i];
        if (!s2d->inuse)
            continue;
        if (backgroundObjects != s2d->inBackground)
            continue;

        if (s2d->relativePos && height > 0) {
            s2d->pos[1] += height;
            s2d->relativePos = false;
        }
        /* advance in time */
        for (int j = 0; j < 4; j++) {
            s2d->color[j] += cls.frametime * s2d->fade[j];
            if (s2d->color[j] < 0.0)
                s2d->color[j] = 0.0;
            else if (s2d->color[j] > 1.0)
                s2d->color[j] = 1.0;
        }
        for (int j = 0; j < 2; j++) {
            s2d->pos[j] += cls.frametime * s2d->speed[j];
            s2d->size[j] += cls.frametime * s2d->enlarge[j];
        }

        /* outside the screen? */
        /*if (s2d->pos[1] >= VID_NORM_HEIGHT || s2d->pos[0] >= VID_NORM_WIDTH)
            continue;*/

        /* render */
        R_Color(s2d->color);

        /* image can be background */
        if (s2d->image[0] != '\0') {
            const image_t* image = R_FindImage(s2d->image, it_pic);
            R_DrawImage(s2d->pos[0], s2d->pos[1], image);
        }

        /* bgcolor can be overlay */
        if (s2d->bgcolor[3] > 0.0)
            R_DrawFill(s2d->pos[0], s2d->pos[1], s2d->size[0], s2d->size[1], s2d->bgcolor);

        /* border */
        if (s2d->border > 0 && s2d->bordercolor[3] > 0.0)
            R_DrawRect(s2d->pos[0], s2d->pos[1], s2d->size[0], s2d->size[1], s2d->bordercolor, s2d->border, 0xFFFF);

        /* render */
        R_Color(s2d->color);

        /* gettext placeholder */
        if (s2d->text) {
            int maxWidth = (int) s2d->size[0];
            if (maxWidth <= 0)
                maxWidth = VID_NORM_WIDTH;
            height += UI_DrawString(s2d->font, s2d->align, s2d->pos[0], s2d->pos[1], s2d->pos[0], maxWidth, -1 , CL_Translate(s2d->text));
        }
    }
    R_Color(nullptr);
}

void SEQ_SendClickEvent (sequenceContext_t* context)
{
    context->endClickLoop = true;
}

void SEQ_SetView (sequenceContext_t* context, vec2_t pos, vec2_t size)
{
    context->pos[0] = pos[0];
    context->pos[1] = pos[1];
    context->size[0] = size[0];
    context->size[1] = size[1];
}

bool SEQ_InitContext (sequenceContext_t* context, const char* name)
{
    sequence_t* sp;
    int i;

    /* find sequence */
    for (i = 0, sp = sequences; i < numSequences; i++, sp++)
        if (Q_streq(name, sp->name))
            break;
    if (i >= numSequences) {
        Com_Printf("Couldn't find sequence '%s'\n", name);
        return false;
    }

    OBJZERO(*context);
    context->numEnts = 0;
    context->numObj2Ds = 0;
    context->time = cl.time;
    context->currentCmd = sp->start;
    context->endCmd = sp->start + sp->length;
    context->animspeed = 1000;

    return true;
}

static void SEQ_StopSequence (sequenceContext_t* context)
{
    context->endClickLoop = true;
}

static bool SEQ_Execute (sequenceContext_t* context)
{
    /* we are inside a waiting command */
    if (context->time > cl.time) {
        /* if we clicked a button we end the waiting loop */
        if (context->endClickLoop) {
            context->time = cl.time;
            context->endClickLoop = false;
        }
    }

    /* run script */
    while (context->time <= cl.time) {
        /* test for finish */
        if (context->currentCmd >= context->endCmd) {
            SEQ_StopSequence(context);
            return false;
        }

        /* call handler */
        seqCmd_t* sc = &seqCmds[context->currentCmd];
        context->currentCmd += sc->handler(context, sc->name, sc->data);
    }

    return true;
}

bool SEQ_Render (sequenceContext_t* context)
{
    if (!context->size[0] || !context->size[1])
        return true;

    if (!SEQ_Execute(context))
        return false;

    /* center screen */
    vec3_t pos;
    pos[0] = context->pos[0] + (context->size[0] - VID_NORM_WIDTH) / 2;
    pos[1] = context->pos[1] + (context->size[1] - VID_NORM_HEIGHT) / 2;
    pos[2] = 0;
    UI_Transform(pos, nullptr, nullptr);

    SEQ_Render2D(context, true);
    SEQ_Render3D(context);
    SEQ_Render2D(context, false);

    UI_Transform(nullptr, nullptr, nullptr);
    return true;
}

sequenceContext_t* SEQ_AllocContext (void)
{
    sequenceContext_t* context = Mem_AllocType(sequenceContext_t);
    return context;
}

void SEQ_FreeContext (sequenceContext_t* context)
{
    Mem_Free(context);
}

/* =========================================================== */

static int SEQ_ExecuteClick (sequenceContext_t* context, const char* name, const char* data)
{
    /* if a CL_SequenceClick_f event was called */
    if (context->endClickLoop) {
        context->endClickLoop = false;
        /* increase the command counter by 1 */
        return 1;
    }
    context->time += 1000;
    /* don't increase the command counter - stay at click command */
    return 0;
}

static int SEQ_ExecuteWait (sequenceContext_t* context, const char* name, const char* data)
{
    context->time += 1000 * atof(name);
    return 1;
}

static int SEQ_ExecuteAnimSpeed (sequenceContext_t* context, const char* name, const char* data)
{
    context->animspeed = atoi(name);
    return 1;
}

static int SEQ_ExecutePrecache (sequenceContext_t* context, const char* name, const char* data)
{
    if (Q_streq(name, "models")) {
        while (*data) {
            Com_DPrintf(DEBUG_CLIENT, "Precaching model: %s\n", data);
            R_FindModel(data);
            data += strlen(data) + 1;
        }
    } else if (Q_streq(name, "pics")) {
        while (*data) {
            Com_DPrintf(DEBUG_CLIENT, "Precaching image: %s\n", data);
            R_FindPics(data);
            data += strlen(data) + 1;
        }
    } else
        Com_Printf("SEQ_ExecutePrecache: unknown format '%s'\n", name);
    return 1;
}

static int SEQ_ExecuteCamera (sequenceContext_t* context, const char* name, const char* data)
{
    /* get values */
    while (*data) {
        const value_t* vp;
        for (vp = seqCamera_vals; vp->string; vp++)
            if (Q_streq(data, vp->string)) {
                data += strlen(data) + 1;
                Com_EParseValue(&context->camera, data, vp->type, vp->ofs, vp->size);
                break;
            }
        if (!vp->string)
            Com_Printf("SEQ_ExecuteCamera: unknown token '%s'\n", data);

        data += strlen(data) + 1;
    }
    return 1;
}

static int SEQ_ExecuteModel (sequenceContext_t* context, const char* name, const char* data)
{
    /* get sequence entity */
    seqEnt_t* se = SEQ_FindEnt(context, name);
    if (!se) {
        int i;
        /* create new sequence entity */
        for (i = 0, se = context->ents; i < context->numEnts; i++, se++)
            if (!se->inuse)
                break;
        if (i >= context->numEnts) {
            if (context->numEnts >= MAX_SEQENTS)
                Com_Error(ERR_FATAL, "Too many sequence entities");
            se = &context->ents[context->numEnts++];
        }
        /* allocate */
        OBJZERO(*se);
        se->inuse = true;
        Q_strncpyz(se->name, name, sizeof(se->name));
        VectorSet(se->color, 0.7, 0.7, 0.7);
    }

    /* get values */
    while (*data) {
        const value_t* vp;
        for (vp = seqEnt_vals; vp->string; vp++)
            if (Q_streq(data, vp->string)) {
                data += strlen(data) + 1;
                Com_EParseValue(se, data, vp->type, vp->ofs, vp->size);
                break;
            }
        if (!vp->string) {
            if (Q_streq(data, "model")) {
                data += strlen(data) + 1;
                Com_DPrintf(DEBUG_CLIENT, "Registering model: %s\n", data);
                se->model = R_FindModel(data);
                if (se->model == nullptr)
                    se->inuse = false;
            } else if (Q_streq(data, "anim")) {
                if (se->model == nullptr)
                    Com_Error(ERR_FATAL, "could not change the animation - no model loaded yet");
                data += strlen(data) + 1;
                Com_DPrintf(DEBUG_CLIENT, "Change anim to: %s\n", data);
                R_AnimChange(&se->as, se->model, data);
            } else
                Com_Printf("SEQ_ExecuteModel: unknown token '%s'\n", data);
        }

        data += strlen(data) + 1;
    }
    return 1;
}

static int SEQ_ExecuteMusic (sequenceContext_t* context, const char* name, const char* data)
{
    Com_DPrintf(DEBUG_CLIENT, "Change music to %s\n", name);
    Cvar_Set("snd_music", "%s", name);
    return 1;
}

static int SEQ_ExecuteSound (sequenceContext_t* context, const char* name, const char* data)
{
    S_StartLocalSample(name, SND_VOLUME_DEFAULT);
    return 1;
}

static int SEQ_ExecuteObj2D (sequenceContext_t* context, const char* name, const char* data)
{
    /* get sequence text */
    seq2D_t* s2d = SEQ_Find2D(context, name);
    if (!s2d) {
        /* create new sequence text */
        int i;
        for (i = 0, s2d = context->obj2Ds; i < context->numObj2Ds; i++, s2d++)
            if (!s2d->inuse)
                break;
        if (i >= context->numObj2Ds) {
            if (context->numObj2Ds >= MAX_SEQ2DS)
                Com_Error(ERR_FATAL, "Too many sequence 2d objects");
            s2d = &context->obj2Ds[context->numObj2Ds++];
        }
        /* allocate */
        OBJZERO(*s2d);
        for (i = 0; i < 4; i++)
            s2d->color[i] = 1.0f;
        s2d->inuse = true;
        Q_strncpyz(s2d->font, "f_big", sizeof(s2d->font));  /* default font */
        Q_strncpyz(s2d->name, name, sizeof(s2d->name));
    }

    /* get values */
    while (*data) {
        const value_t* vp;
        for (vp = seq2D_vals; vp->string; vp++)
            if (Q_streq(data, vp->string)) {
                data += strlen(data) + 1;
                switch (vp->type) {
                case V_TRANSLATION_STRING:
                case V_HUNK_STRING:
                    Mem_PoolStrDupTo(data, &Com_GetValue<char*>(s2d, vp), cl_genericPool, 0);
                    break;

                default:
                    Com_EParseValue(s2d, data, vp->type, vp->ofs, vp->size);
                    break;
                }
                break;
            }
        if (!vp->string)
            Com_Printf("SEQ_ExecuteObj2D: unknown token '%s'\n", data);

        data += strlen(data) + 1;
    }
    return 1;
}

static int SEQ_ExecuteDelete (sequenceContext_t* context, const char* name, const char* data)
{
    seqEnt_t* se = SEQ_FindEnt(context, name);
    if (se)
        se->inuse = false;

    seq2D_t* s2d = SEQ_Find2D(context, name);
    if (s2d) {
        s2d->inuse = false;

        Mem_Free(s2d->text);
        s2d->text = nullptr;
    }

    if (!se && !s2d)
        Com_Printf("SEQ_ExecuteDelete: couldn't find '%s'\n", name);
    return 1;
}

static int SEQ_ExecuteCommand (sequenceContext_t* context, const char* name, const char* data)
{
    /* add the command */
    Cbuf_AddText("%s\n", name);
    return 1;
}

/* =========================================================== */

static char const* const seqCmdName[] = {
    "end",
    "wait",
    "click",
    "precache",
    "camera",
    "model",
    "obj2d",
    "music",
    "sound",
    "rem",
    "delete",
    "animspeed",
    "cmd"
};

#define SEQ_NUMCMDS lengthof(seqCmdName)

static sequenceHandler_t seqCmdFunc[] = {
    nullptr,
    SEQ_ExecuteWait,
    SEQ_ExecuteClick,
    SEQ_ExecutePrecache,
    SEQ_ExecuteCamera,
    SEQ_ExecuteModel,
    SEQ_ExecuteObj2D,
    SEQ_ExecuteMusic,
    SEQ_ExecuteSound,
    SEQ_ExecuteDelete,
    SEQ_ExecuteDelete,
    SEQ_ExecuteAnimSpeed,
    SEQ_ExecuteCommand
};
CASSERT(lengthof(seqCmdFunc) == lengthof(seqCmdName));

static int CL_FindSequenceCommand (const char* commandName)
{
    for (int i = 0; i < SEQ_NUMCMDS; i++) {
        if (Q_streq(commandName, seqCmdName[i])) {
            return i;
        }
    }
    return -1;
}

void CL_ParseSequence (const char* name, const char** text)
{
    const char* errhead = "CL_ParseSequence: unexpected end of file (sequence ";
    int i;

    /* search for sequences with same name */
    for (i = 0; i < numSequences; i++)
        if (Q_streq(name, sequences[i].name))
            break;

    if (i < numSequences) {
        Com_Printf("CL_ParseSequence: sequence def \"%s\" with same name found, second ignored\n", name);
        return;
    }

    /* initialize the sequence */
    if (numSequences >= MAX_SEQUENCES)
        Com_Error(ERR_FATAL, "Too many sequences");

    sequence_t* sp = &sequences[numSequences++];
    OBJZERO(*sp);
    Q_strncpyz(sp->name, name, sizeof(sp->name));
    sp->start = numSeqCmds;

    /* get it's body */
    const char* token = Com_Parse(text);

    if (!*text || *token != '{') {
        Com_Printf("CL_ParseSequence: sequence def \"%s\" without body ignored\n", name);
        numSequences--;
        return;
    }

    do {
        token = Com_EParse(text, errhead, name);
        if (!*text)
            break;
        if (*token == '}')
            break;

        /* check for commands */
        int i = CL_FindSequenceCommand(token);
        if (i != -1) {
            int maxLength = MAX_DATA_LENGTH;
            char* data;

            /* found a command */
            token = Com_EParse(text, errhead, name);
            if (!*text)
                return;

            if (numSeqCmds >= MAX_SEQCMDS)
                Com_Error(ERR_FATAL, "Too many sequence commands for %s\n", name);

            /* init seqCmd */
            if (seqCmds == nullptr)
                seqCmds = Mem_PoolAllocTypeN(seqCmd_t, MAX_SEQCMDS, cl_genericPool);
            seqCmd_t* sc = &seqCmds[numSeqCmds++];
            OBJZERO(*sc);
            sc->handler = seqCmdFunc[i];
            sp->length++;

            /* copy name */
            Q_strncpyz(sc->name, token, sizeof(sc->name));

            /* read data */
            token = Com_EParse(text, errhead, name);
            if (!*text)
                return;
            if (*token == '{') {
                // TODO depth is useless IMHO (bayo)
                int depth = 1;
                data = &sc->data[0];
                while (depth) {
                    if (maxLength <= 0) {
                        Com_Printf("Too much data for sequence %s\n", sc->name);
                        break;
                    }
                    token = Com_EParse(text, errhead, name);
                    if (!*text)
                        return;

                    if (*token == '{')
                        depth++;
                    else if (*token == '}')
                        depth--;
                    if (depth) {
                        Q_strncpyz(data, token, maxLength);
                        data += strlen(token) + 1;
                        maxLength -= (strlen(token) + 1);
                    }
                }
            } else if (*token == '(') {
                linkedList_t* list;
                Com_UnParseLastToken();
                if (!Com_ParseList(text, &list)) {
                    Com_Error(ERR_DROP, "CL_ParseSequence: error while reading list (sequence \"%s\")", name);
                }
                data = &sc->data[0];
                for (linkedList_t* element = list; element != nullptr; element = element->next) {
                    if (maxLength <= 0) {
                        Com_Printf("Too much data for sequence %s", sc->name);
                        break;
                    }
                    const char* v = (char*)element->data;
                    Q_strncpyz(data, v, maxLength);
                    data += strlen(v) + 1;
                    maxLength -= (strlen(v) + 1);
                }
                LIST_Delete(&list);
            } else {
                Com_UnParseLastToken();
            }
        } else {
            Com_Printf("CL_ParseSequence: unknown command \"%s\" ignored (sequence %s)\n", token, name);
            Com_EParse(text, errhead, name);
        }
    } while (*text);
}

void SEQ_Shutdown (void)
{
    OBJZERO(sequences);
    numSequences = 0;
    seqCmds = nullptr;
    numSeqCmds = 0;
}