cl_damagetext.qc

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#include "cl_damagetext.qh"
 
CLASS(DamageText, Object)
    ATTRIB(DamageText, m_color, vector, autocvar_cl_damagetext_color);
    ATTRIB(DamageText, m_color_friendlyfire, vector, autocvar_cl_damagetext_friendlyfire_color);
    ATTRIB(DamageText, m_size, float, autocvar_cl_damagetext_size_min);
    ATTRIB(DamageText, alpha, float, autocvar_cl_damagetext_alpha_start);
    ATTRIB(DamageText, fade_rate, float, 0);
    ATTRIB(DamageText, m_shrink_rate, float, 0);
    ATTRIB(DamageText, m_group, int, 0);
    ATTRIB(DamageText, m_friendlyfire, bool, false);
    ATTRIB(DamageText, m_healthdamage, int, 0);
    ATTRIB(DamageText, m_armordamage, int, 0);
    ATTRIB(DamageText, m_potential_damage, int, 0);
    ATTRIB(DamageText, m_deathtype, int, 0);
    ATTRIB(DamageText, hit_time, float, 0);
    ATTRIB(DamageText, text, string, string_null);
    ATTRIB(DamageText, m_screen_coords, bool, false);
 
    STATIC_ATTRIB(DamageText, screen_count, int, 0);
 
    void DamageText_draw2d(DamageText this)
    {
        float since_hit = time - this.hit_time;
        // can't use `dt = hit_time - prev_update_time` because shrinking wouldn't be linear
        float size = this.m_size - since_hit * this.m_shrink_rate * this.m_size;
        float alpha_ = this.alpha - since_hit * this.fade_rate;
        bool haslifetime = (autocvar_cl_damagetext_lifetime < 0 // negative ignores lifetime
                || (since_hit < autocvar_cl_damagetext_lifetime));
        if (alpha_ <= 0 || size <= 0 || !haslifetime)
        {
            IL_REMOVE(g_damagetext, this);
            delete(this);
            return;
        }
 
        vector screen_pos;
        if (this.m_screen_coords)
            screen_pos = this.origin + since_hit * autocvar_cl_damagetext_2d_velocity;
        else
        {
            vector forward, right, up;
            MAKE_VECTORS(view_angles, forward, right, up);
 
            vector world_offset = since_hit * autocvar_cl_damagetext_velocity_world
                    + autocvar_cl_damagetext_offset_world;
            vector world_pos = this.origin
                             + world_offset.x * forward
                             + world_offset.y * right
                             + world_offset.z * up;
 
            screen_pos = project_3d_to_2d(world_pos)
                + (since_hit * autocvar_cl_damagetext_velocity_screen)
                + autocvar_cl_damagetext_offset_screen;
        }
        screen_pos.y += size / 2;
 
        // strip trailing spaces
        string dtext = this.text;
        int j = strlen(dtext) - 1;
        while (substring(dtext, j, 1) == " " && j >= 0)
            --j;
        if (j < strlen(dtext) - 1)
            dtext = substring(dtext, 0, j + 1);
 
        // strip leading spaces
        j = 0;
        while (substring(dtext, j, 1) == " " && j < strlen(dtext))
            ++j;
        if (j > 0)
            dtext = substring(dtext, j, strlen(dtext) - j);
 
        // Center damage text
        screen_pos.x -= stringwidth(dtext, true, hud_fontsize * 2) * 0.5;
 
        if (screen_pos.z >= 0)
        {
            screen_pos.z = 0;
            vector rgb;
            if (this.m_friendlyfire)
                rgb = this.m_color_friendlyfire;
            else
                rgb = this.m_color;
 
            if (autocvar_cl_damagetext_color_per_weapon)
            {
                Weapon w = DEATH_WEAPONOF(this.m_deathtype);
                if (w != WEP_Null) rgb = w.m_color;
            }
 
            vector drawfontscale_save = drawfontscale;
            drawfontscale = (size / autocvar_cl_damagetext_size_max) * '1 1 0';
            screen_pos.y -= drawfontscale.x * size / 2;
            drawcolorcodedstring2_builtin(screen_pos, this.text,
                    autocvar_cl_damagetext_size_max * '1 1 0',
                    rgb, alpha_, DRAWFLAG_NORMAL);
            drawfontscale = drawfontscale_save;
        }
    }
    ATTRIB(DamageText, draw2d, void(DamageText), DamageText_draw2d);
 
    void DamageText_update(DamageText this, vector _origin, bool screen_coords,
            int _health, int _armor, int _potential_damage, int _deathtype)
    {
        this.m_healthdamage = _health;
        this.m_armordamage = _armor;
        this.m_potential_damage = _potential_damage;
        this.m_deathtype = _deathtype;
        this.hit_time = time;
        setorigin(this, _origin);
        this.m_screen_coords = screen_coords;
        if (this.m_screen_coords)
            this.alpha = autocvar_cl_damagetext_2d_alpha_start;
        else
            this.alpha = autocvar_cl_damagetext_alpha_start;
 
        int health           = rint(this.m_healthdamage
                             / DAMAGETEXT_PRECISION_MULTIPLIER);
        int armor            = rint(this.m_armordamage
                             / DAMAGETEXT_PRECISION_MULTIPLIER);
        int total            = rint((this.m_healthdamage + this.m_armordamage)
                             / DAMAGETEXT_PRECISION_MULTIPLIER);
        int potential        = rint(this.m_potential_damage
                             / DAMAGETEXT_PRECISION_MULTIPLIER);
        int potential_health = rint((this.m_potential_damage - this.m_armordamage)
                             / DAMAGETEXT_PRECISION_MULTIPLIER);
 
        bool redundant = almost_equals_eps(this.m_healthdamage + this.m_armordamage,
                this.m_potential_damage, 5);
 
        string s = autocvar_cl_damagetext_format;
        s = strreplace("{armor}", (
            (this.m_armordamage == 0 && autocvar_cl_damagetext_format_hide_redundant)
                ? ""
                : sprintf("%d", armor)
            ), s);
        s = strreplace("{potential}", (
            (redundant && autocvar_cl_damagetext_format_hide_redundant)
                ? ""
                : sprintf("%d", potential)
            ), s);
        s = strreplace("{potential_health}", (
            (redundant && autocvar_cl_damagetext_format_hide_redundant)
                ? ""
                : sprintf("%d", potential_health)
            ), s);
 
        s = strreplace("{health}", (
            (health == potential_health || !autocvar_cl_damagetext_format_verbose)
                ? sprintf("%d",      health)
                : sprintf("%d (%d)", health, potential_health)
            ), s);
        s = strreplace("{total}", (
            (total == potential || !autocvar_cl_damagetext_format_verbose)
                ? sprintf("%d",      total)
                : sprintf("%d (%d)", total, potential)
            ), s);
 
        // futureproofing: remove any remaining (unknown) format strings
        // in case we add new ones in the future so players can use them
        // on new servers and still have working damagetext on old ones
        while (true)
        {
            int opening_pos = strstrofs(s, "{", 0);
            if (opening_pos == -1) break;
            int closing_pos = strstrofs(s, "}", opening_pos);
            if (closing_pos == -1 || closing_pos <= opening_pos) break;
            s = strcat(
                substring(s, 0, opening_pos),
                substring_range(s, closing_pos + 1, strlen(s))
            );
        }
 
        strcpy(this.text, s);
 
        this.m_size = map_bound_ranges(potential,
            autocvar_cl_damagetext_size_min_damage, autocvar_cl_damagetext_size_max_damage,
            autocvar_cl_damagetext_size_min,        autocvar_cl_damagetext_size_max);
    }
 
    CONSTRUCTOR(DamageText, int _group, vector _origin, bool _screen_coords,
        int _health, int _armor, int _potential_damage, int _deathtype, bool _friendlyfire)
    {
        CONSTRUCT(DamageText);
        this.m_group = _group;
        this.m_friendlyfire = _friendlyfire;
        this.m_screen_coords = _screen_coords;
        if (_screen_coords)
        {
            if (autocvar_cl_damagetext_2d_alpha_lifetime)
                this.fade_rate = 1 / autocvar_cl_damagetext_2d_alpha_lifetime;
            if (autocvar_cl_damagetext_2d_size_lifetime)
                this.m_shrink_rate = 1 / autocvar_cl_damagetext_2d_size_lifetime;
        }
        else
        {
            if (autocvar_cl_damagetext_alpha_lifetime)
                this.fade_rate = 1 / autocvar_cl_damagetext_alpha_lifetime;
            this.m_shrink_rate = 0;
        }
        DamageText_update(this, _origin, _screen_coords,
            _health, _armor, _potential_damage, _deathtype);
        IL_PUSH(g_damagetext, this);
    }
 
    DESTRUCTOR(DamageText)
    {
        strfree(this.text);
        --DamageText_screen_count;
    }
ENDCLASS(DamageText)
 
float current_alpha(entity damage_text)
{
    // alpha doesn't change - actual alpha is always calculated from the initial value
    return damage_text.alpha - (time - damage_text.hit_time) * damage_text.fade_rate;
}
 
NET_HANDLE(damagetext, bool isNew)
{
    make_pure(this);
    int server_entity_index = ReadByte();
    int deathtype = ReadInt24_t();
    int flags = ReadByte();
    bool friendlyfire = flags & DTFLAG_SAMETEAM;
 
    int health, armor, potential_damage;
    if (flags & DTFLAG_BIG_HEALTH) health = ReadInt24_t();
    else health = ReadShort();
    if (flags & DTFLAG_NO_ARMOR) armor = 0;
    else if (flags & DTFLAG_BIG_ARMOR) armor = ReadInt24_t();
    else armor = ReadShort();
    if (flags & DTFLAG_NO_POTENTIAL) potential_damage = health + armor;
    else if (flags & DTFLAG_BIG_POTENTIAL) potential_damage = ReadInt24_t();
    else potential_damage = ReadShort();
 
    return = true;
    if (!isNew) return;
    if (autocvar_cl_damagetext == 0) return;
    if (friendlyfire)
    {
        if (autocvar_cl_damagetext_friendlyfire == 0)
            return;
 
        if (autocvar_cl_damagetext_friendlyfire == 1
        && health == 0 && armor == 0)
            return;
    }
 
    int client_entity_index = server_entity_index - 1;
    entity entcs = entcs_receiver(client_entity_index);
 
    bool can_use_3d = entcs && entcs.has_origin;
    bool too_close = vdist(entcs.origin - view_origin, <, autocvar_cl_damagetext_2d_close_range);
    bool prefer_in_view = autocvar_cl_damagetext_2d_out_of_view && !projected_on_screen(project_3d_to_2d(entcs.origin));
    bool prefer_2d = spectatee_status != -1 && autocvar_cl_damagetext_2d && (too_close || prefer_in_view);
 
    vector position;
    bool is2d;
    entity entDT = NULL; // which DT to update
 
    float alphathreshold = autocvar_cl_damagetext_accumulate_alpha_rel
                    * autocvar_cl_damagetext_alpha_start;
 
    // check if this entity already has a DamageText for it
    IL_EACH(g_damagetext, it.m_group == server_entity_index, {
        // if the time window where damage accumulates closes,
        // disown the parent entity from this DamageText
        // and (likely) give the entity a new DT afterwards
        // this should only cancel damage accumulation for this DT
 
        if (flags & DTFLAG_STOP_ACCUMULATION
            || (current_alpha(it) < alphathreshold)
            || ((autocvar_cl_damagetext_accumulate_lifetime >= 0) // negative never disowns
                && (time - it.hit_time > autocvar_cl_damagetext_accumulate_lifetime)))
        {
            it.m_group = 0;
        }
        else
        {
            health += it.m_healthdamage;
            armor += it.m_armordamage;
            potential_damage += it.m_potential_damage;
 
            entDT = it;
        }
        break;
    });
 
    if (can_use_3d && !prefer_2d)
    {
        // world coords
        is2d = false;
        position = entcs.origin;
 
        if (entDT)
            goto updateDT;
 
        // 3D DamageTexts can later be changed into 2D,
        // increment this here just in case
        ++DamageText_screen_count;
        goto spawnnewDT;
    }
    else if (autocvar_cl_damagetext_2d && spectatee_status != -1)
    {
        // screen coords only
        is2d = true;
        position = vec2(vid_conwidth  * autocvar_cl_damagetext_2d_pos.x,
                        vid_conheight * autocvar_cl_damagetext_2d_pos.y);
 
        if (entDT)
            goto updateDT;
 
        // offset when hitting multiple enemies, dmgtext would overlap
        position += autocvar_cl_damagetext_2d_overlap_offset * DamageText_screen_count++;
        goto spawnnewDT;
    }
    return;
 
LABEL(updateDT)
    DamageText_update(entDT, position, is2d, health, armor, potential_damage, deathtype);
    return;
 
LABEL(spawnnewDT)
    NEW(DamageText, server_entity_index, position, is2d,
        health, armor, potential_damage, deathtype, friendlyfire);
    return;
}