#include "pch.h"
#include "engine.h"

VARP(oqdynent, 0, 1, 1);
VARP(animationinterpolationtime, 0, 150, 1000);

model *loadingmodel = NULL;

#include "animmodel.h"
#include "vertmodel.h"
#include "skelmodel.h"
#include "md2.h"
#include "md3.h"
#include "md5.h"

#define checkmdl if(!loadingmodel) { conoutf("not loading a model"); return; }

void mdlcullface(int *cullface)
{
    checkmdl;
    loadingmodel->cullface = *cullface!=0;
}

COMMAND(mdlcullface, "i");

void mdlcollide(int *collide)
{
    checkmdl;
    loadingmodel->collide = *collide!=0;
}

COMMAND(mdlcollide, "i");

void mdlellipsecollide(int *collide)
{
    checkmdl;
    loadingmodel->ellipsecollide = *collide!=0;
}   
    
COMMAND(mdlellipsecollide, "i");

void mdlspec(int *percent)
{
    checkmdl;
    float spec = 1.0f; 
    if(*percent>0) spec = *percent/100.0f;
    else if(*percent<0) spec = 0.0f;
    loadingmodel->setspec(spec);
}

COMMAND(mdlspec, "i");

void mdlambient(int *percent)
{
    checkmdl;
    float ambient = 0.3f;
    if(*percent>0) ambient = *percent/100.0f;
    else if(*percent<0) ambient = 0.0f;
    loadingmodel->setambient(ambient);
}

COMMAND(mdlambient, "i");

void mdlalphatest(float *cutoff)
{   
    checkmdl;
    loadingmodel->setalphatest(max(0.0f, min(1.0f, *cutoff)));
}

COMMAND(mdlalphatest, "f");

void mdlalphablend(int *blend)
{   
    checkmdl;
    loadingmodel->setalphablend(*blend!=0);
}

COMMAND(mdlalphablend, "i");

void mdlglow(int *percent)
{
    checkmdl;
    float glow = 3.0f;
    if(*percent>0) glow = *percent/100.0f;
    else if(*percent<0) glow = 0.0f;
    loadingmodel->setglow(glow);
}

COMMAND(mdlglow, "i");

void mdlenvmap(float *envmapmax, float *envmapmin, char *envmap)
{
    checkmdl;
    loadingmodel->setenvmap(*envmapmin, *envmapmax, envmap[0] ? cubemapload(envmap) : NULL);
}

COMMAND(mdlenvmap, "ffs");

void mdltranslucent(float *translucency)
{
    checkmdl;
    loadingmodel->settranslucency(*translucency);
}

COMMAND(mdltranslucent, "f");

void mdlfullbright(float *fullbright)
{
    checkmdl;
    loadingmodel->setfullbright(*fullbright);
}

COMMAND(mdlfullbright, "f");

void mdlshader(char *shader)
{
    checkmdl;
    loadingmodel->setshader(lookupshaderbyname(shader));
}

COMMAND(mdlshader, "s");

void mdlspin(float *rate)
{
    checkmdl;
    loadingmodel->spin = *rate;
}

COMMAND(mdlspin, "f");

void mdlscale(int *percent)
{
    checkmdl;
    float scale = 0.3f;
    if(*percent>0) scale = *percent/100.0f;
    else if(*percent<0) scale = 0.0f;
    loadingmodel->scale = scale;
}  

COMMAND(mdlscale, "i");

void mdltrans(float *x, float *y, float *z)
{
    checkmdl;
    loadingmodel->translate = vec(*x, *y, *z);
} 

COMMAND(mdltrans, "fff");

void mdlshadow(int *shadow)
{
    checkmdl;
    loadingmodel->shadow = *shadow!=0;
}

COMMAND(mdlshadow, "i");

void mdlbb(float *rad, float *h, float *eyeheight)
{
    checkmdl;
    loadingmodel->collideradius = *rad;
    loadingmodel->collideheight = *h;
    loadingmodel->eyeheight = *eyeheight; 
}

COMMAND(mdlbb, "fff");

void mdlname()
{
    checkmdl;
    result(loadingmodel->name());
}

COMMAND(mdlname, "");

// mapmodels

vector<mapmodelinfo> mapmodels;

void mmodel(char *name)
{
    mapmodelinfo &mmi = mapmodels.add();
    s_strcpy(mmi.name, name);
    mmi.m = NULL;
}

void mapmodelcompat(int *rad, int *h, int *tex, char *name, char *shadow)
{
    mmodel(name);
}

void mapmodelreset() { mapmodels.setsize(0); }

mapmodelinfo &getmminfo(int i) { return mapmodels.inrange(i) ? mapmodels[i] : *(mapmodelinfo *)0; }
const char *mapmodelname(int i) { return mapmodels.inrange(i) ? mapmodels[i].name : NULL; }

COMMAND(mmodel, "s");
COMMANDN(mapmodel, mapmodelcompat, "iiiss");
COMMAND(mapmodelreset, "");

// model registry

hashtable<const char *, model *> mdllookup;

model *loadmodel(const char *name, int i, bool msg)
{
    if(!name)
    {
        if(!mapmodels.inrange(i)) return NULL;
        mapmodelinfo &mmi = mapmodels[i];
        if(mmi.m) return mmi.m;
        name = mmi.name;
    }
    model **mm = mdllookup.access(name);
    model *m;
    if(mm) m = *mm;
    else
    { 
        if(msg)
        {
            s_sprintfd(filename)("packages/models/%s", name);
            show_out_of_renderloop_progress(0, filename);
        }
        m = new md2(name);
        loadingmodel = m;
        if(!m->load())
        {
            delete m;
            m = new md3(name);
            loadingmodel = m;
            if(!m->load())
            {    
                delete m;
                m = new md5(name);
                loadingmodel = m;
                if(!m->load())
                {
                    delete m;
                    loadingmodel = NULL;
                    return NULL; 
                }
            }
        }
        loadingmodel = NULL;
        mdllookup.access(m->name(), &m);
    }
    if(mapmodels.inrange(i) && !mapmodels[i].m) mapmodels[i].m = m;
    return m;
}

void clear_mdls()
{
    enumerate(mdllookup, model *, m, delete m);
}

void cleanupmodels()
{
    enumerate(mdllookup, model *, m, m->cleanup());
}

bool modeloccluded(const vec &center, float radius)
{
    int br = int(radius*2)+1;
    return pvsoccluded(ivec(int(center.x-radius), int(center.y-radius), int(center.z-radius)), ivec(br, br, br)) ||
           bboccluded(ivec(int(center.x-radius), int(center.y-radius), int(center.z-radius)), ivec(br, br, br));
}

VAR(showboundingbox, 0, 0, 2);

void render2dbox(vec &o, float x, float y, float z)
{
    glBegin(GL_LINE_LOOP);
    glVertex3f(o.x, o.y, o.z);
    glVertex3f(o.x, o.y, o.z+z);
    glVertex3f(o.x+x, o.y+y, o.z+z);
    glVertex3f(o.x+x, o.y+y, o.z);
    glEnd();
}

void render3dbox(vec &o, float tofloor, float toceil, float xradius, float yradius)
{
    if(yradius<=0) yradius = xradius;
    vec c = o;
    c.sub(vec(xradius, yradius, tofloor));
    float xsz = xradius*2, ysz = yradius*2;
    float h = tofloor+toceil;
    notextureshader->set();
    glDisable(GL_TEXTURE_2D);
    glColor3f(1, 1, 1);
    render2dbox(c, xsz, 0, h);
    render2dbox(c, 0, ysz, h);
    c.add(vec(xsz, ysz, 0));
    render2dbox(c, -xsz, 0, h);
    render2dbox(c, 0, -ysz, h);
    xtraverts += 16;
    glEnable(GL_TEXTURE_2D);
}

void renderellipse(vec &o, float xradius, float yradius, float yaw)
{
    notextureshader->set();
    glDisable(GL_TEXTURE_2D);
    glColor3f(0.5f, 0.5f, 0.5f);
    glBegin(GL_LINE_LOOP);
    loopi(16)
    {
        vec p(xradius*cosf(2*M_PI*i/16.0f), yradius*sinf(2*M_PI*i/16.0f), 0);
        p.rotate_around_z((yaw+90)*RAD);
        p.add(o);
        glVertex3fv(p.v);
    }
    glEnd();
    glEnable(GL_TEXTURE_2D);
}

void setshadowmatrix(const plane &p, const vec &dir)
{
    float d = p.dot(dir);
    GLfloat m[16] =
    {
        d-dir.x*p.x,       -dir.y*p.x,       -dir.z*p.x,      0, 
         -dir.x*p.y,      d-dir.y*p.y,       -dir.z*p.y,      0,
         -dir.x*p.z,       -dir.y*p.z,      d-dir.z*p.z,      0,
         -dir.x*p.offset,  -dir.y*p.offset,  -dir.z*p.offset, d
    };
    glMultMatrixf(m);
}

VARP(bounddynshadows, 0, 1, 1);
VARP(dynshadow, 0, 60, 100);

void rendershadow(vec &dir, model *m, int anim, const vec &o, vec center, float radius, float yaw, float pitch, float speed, int basetime, dynent *d, int cull, modelattach *a)
{
    vec floor;
    float dist = rayfloor(center, floor, 0, center.z);
    if(dist<=0 || dist>=center.z) return;
    center.z -= dist;
    if((cull&MDL_CULL_VFC) && refracting<0 && center.z>=reflectz) return;
    if(vec(center).sub(camera1->o).dot(floor)>0) return;

    vec shaddir; 
    if(cull&MDL_DYNSHADOW) 
    {
        extern vec shadowdir;
        shaddir = shadowdir;
        shaddir.normalize();
    }
    else
    {
        shaddir = dir;
        shaddir.z = 0;
        if(!shaddir.iszero()) shaddir.normalize();
        shaddir.z = 1.5f*(dir.z*0.5f+1);
        shaddir.normalize();
    }

    glDisable(GL_TEXTURE_2D);
    glDepthMask(GL_FALSE);
    
    if(!hasFBO || !reflecting || !refracting || hasDS) 
    {
        glEnable(GL_STENCIL_TEST);

        if(bounddynshadows)
        {    
            nocolorshader->set();
            glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
            glStencilFunc(GL_ALWAYS, 1, 1);
            glStencilOp(GL_KEEP, GL_REPLACE, GL_ZERO);

            vec below(center);
            below.z -= 1.0f;
            glPushMatrix();
            setshadowmatrix(plane(floor, -floor.dot(below)), shaddir);
            glBegin(GL_QUADS);
            loopi(6) if((shaddir[dimension(i)]>0)==dimcoord(i)) loopj(4)
            {
                const ivec &cc = cubecoords[fv[i][j]];
                glVertex3f(center.x + (cc.x ? 1.5f : -1.5f)*radius,
                           center.y + (cc.y ? 1.5f : -1.5f)*radius,
                           cc.z ? center.z + dist + radius : below.z);
                xtraverts += 4;
            }
            glEnd();
            glPopMatrix();

            glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, fading ? GL_FALSE : GL_TRUE);
        }
    }

    float intensity = dynshadow/100.0f;
    if(fogging)
    {
        if(renderpath!=R_FIXEDFUNCTION) setfogplane(0, max(0.1f, reflectz-center.z));
        else intensity *= 1.0f - max(0.0f, min(1.0f, (reflectz - center.z)/waterfog));
    }
    if((anim&ANIM_INDEX)==ANIM_DYING) intensity *= max(1.0f - (lastmillis - basetime)/1000.0f, 0.0f);
    glColor4f(0, 0, 0, intensity);

    if(!hasFBO || !reflecting || !refracting || hasDS)
    {
        glStencilFunc(GL_NOTEQUAL, bounddynshadows ? 0 : 1, 1);
        glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
    }

    vec above(center);
    above.z += 0.25f;

    glPushMatrix();
    setshadowmatrix(plane(floor, -floor.dot(above)), shaddir);
    m->render(anim|ANIM_NOSKIN|ANIM_SHADOW, speed, basetime, o, yaw, pitch, d, a);
    glPopMatrix();

    glEnable(GL_TEXTURE_2D);
    glDepthMask(GL_TRUE);
    
    if(!hasFBO || !reflecting || !refracting || hasDS) glDisable(GL_STENCIL_TEST);
}

struct batchedmodel
{
    vec pos, color, dir;
    int anim;
    float yaw, pitch, speed;
    int basetime, cull;
    dynent *d;
    int attached;
    occludequery *query;
};  
struct modelbatch
{
    model *m;
    vector<batchedmodel> batched;
};  
static vector<modelbatch *> batches;
static vector<modelattach> modelattached;
static int numbatches = -1;
static occludequery *modelquery = NULL;

void startmodelbatches()
{
    numbatches = 0;
    modelattached.setsizenodelete(0);
}

batchedmodel &addbatchedmodel(model *m)
{
    modelbatch *b = NULL;
    if(m->batch>=0 && m->batch<numbatches && batches[m->batch]->m==m) b = batches[m->batch];
    else
    {
        if(numbatches<batches.length())
        {
            b = batches[numbatches];
            b->batched.setsizenodelete(0);
        }
        else b = batches.add(new modelbatch);
        b->m = m;
        m->batch = numbatches++;
    }
    batchedmodel &bm = b->batched.add();
    bm.query = modelquery;
    return bm;
}

void renderbatchedmodel(model *m, batchedmodel &b)
{
    modelattach *a = NULL;
    if(b.attached>=0) a = &modelattached[b.attached];
    if((!shadowmap || renderpath==R_FIXEDFUNCTION) && (b.cull&(MDL_SHADOW|MDL_DYNSHADOW)) && dynshadow && hasstencil && !reflecting && refracting<=0)
    {
        vec center;
        float radius = m->boundsphere(0/*frame*/, center, a); // FIXME
        center.add(b.pos);
        rendershadow(b.dir, m, b.anim, b.pos, center, radius, b.yaw, b.pitch, b.speed, b.basetime, b.d, b.cull, a);
        if((b.cull&MDL_CULL_VFC) && refracting<0 && center.z-radius>=reflectz) return;
    }

    int anim = b.anim;
    if(shadowmapping) 
    {
        anim |= ANIM_NOSKIN; 
        setenvparamf("shadowintensity", SHPARAM_VERTEX, 1,
            (anim&ANIM_INDEX)==ANIM_DYING ? max(1.0f - (lastmillis - b.basetime)/1000.0f, 0.0f) : 1.0f);
    }
    else 
    {
        if(b.cull&MDL_TRANSLUCENT) anim |= ANIM_TRANSLUCENT;
        if(b.cull&MDL_FULLBRIGHT) anim |= ANIM_FULLBRIGHT;
    }

    m->render(anim, b.speed, b.basetime, b.pos, b.yaw, b.pitch, b.d, a, b.color, b.dir);
}

struct translucentmodel
{
    model *m;
    batchedmodel *batched;
    float dist;
};

static int sorttranslucentmodels(const translucentmodel *x, const translucentmodel *y)
{
    if(x->dist > y->dist) return -1;
    if(x->dist < y->dist) return 1;
    return 0;
}

void endmodelbatches()
{
    vector<translucentmodel> translucent;
    loopi(numbatches)
    {
        modelbatch &b = *batches[i];
        if(b.batched.empty()) continue;
        bool rendered = false;
        occludequery *query = NULL;
        loopvj(b.batched) 
        {
            batchedmodel &bm = b.batched[j];
            if(bm.query!=query)
            {
                if(query) endquery(query);
                query = bm.query;
                if(query) startquery(query);
            }
            if(bm.cull&MDL_TRANSLUCENT && (!query || query->owner==bm.d))
            {
                translucentmodel &tm = translucent.add();
                tm.m = b.m;
                tm.batched = &bm;
                tm.dist = camera1->o.dist(bm.pos);
                continue;
            }
            if(!rendered) { b.m->startrender(); rendered = true; }
            renderbatchedmodel(b.m, bm);
        }
        if(query) endquery(query);
        if(rendered) b.m->endrender();
    }
    if(translucent.length())
    {
        translucent.sort(sorttranslucentmodels);
        model *lastmodel = NULL;
        occludequery *query = NULL;
        loopv(translucent)
        {
            translucentmodel &tm = translucent[i];
            if(lastmodel!=tm.m)
            {
                if(lastmodel) lastmodel->endrender();
                (lastmodel = tm.m)->startrender();
            }
            if(query!=tm.batched->query)
            {
                if(query) endquery(query);
                query = tm.batched->query;
                if(query) startquery(query);
            }
            renderbatchedmodel(tm.m, *tm.batched);
        }
        if(query) endquery(query);
        if(lastmodel) lastmodel->endrender();
    }
    numbatches = -1;
}

void startmodelquery(occludequery *query)
{
    modelquery = query;
}

void endmodelquery()
{
    int querybatches = 0;
    loopi(numbatches)
    {
        modelbatch &b = *batches[i];
        if(b.batched.empty() || b.batched.last().query!=modelquery) continue;
        querybatches++;
    }
    if(querybatches<=1)
    {
        if(!querybatches) modelquery->fragments = 0;
        modelquery = NULL;
        return;
    }
    int minattached = modelattached.length();
    startquery(modelquery);
    loopi(numbatches)
    {
        modelbatch &b = *batches[i];
        if(b.batched.empty() || b.batched.last().query!=modelquery) continue;
        b.m->startrender();
        do
        {
            batchedmodel &bm = b.batched.pop();
            if(bm.attached>=0) minattached = min(minattached, bm.attached);
            renderbatchedmodel(b.m, bm);
        }
        while(b.batched.length() && b.batched.last().query==modelquery);
        b.m->endrender();
    }
    endquery(modelquery);
    modelquery = NULL;
    modelattached.setsizenodelete(minattached);
}

VARP(maxmodelradiusdistance, 10, 100, 1000);

void rendermodelquery(model *m, dynent *d, const vec &center, float radius)
{
    d->query = newquery(d);
    if(!d->query) return;
    nocolorshader->set();
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
    glDepthMask(GL_FALSE);
    startquery(d->query);
    int br = int(radius*2)+1;
    drawbb(ivec(int(center.x-radius), int(center.y-radius), int(center.z-radius)), ivec(br, br, br));
    endquery(d->query);
    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, fading ? GL_FALSE : GL_TRUE);
    glDepthMask(GL_TRUE);
}   

extern int oqfrags;

void rendermodel(entitylight *light, const char *mdl, int anim, const vec &o, float yaw, float pitch, int cull, dynent *d, modelattach *a, int basetime, float speed)
{
    if(shadowmapping && !(cull&(MDL_SHADOW|MDL_DYNSHADOW))) return;
    model *m = loadmodel(mdl); 
    if(!m) return;
    vec center;
    float radius = 0;
    bool shadow = (!shadowmap || renderpath==R_FIXEDFUNCTION) && (cull&(MDL_SHADOW|MDL_DYNSHADOW)) && dynshadow && hasstencil,
         doOQ = cull&MDL_CULL_QUERY && hasOQ && oqfrags && oqdynent;
    if(cull&(MDL_CULL_VFC|MDL_CULL_DIST|MDL_CULL_OCCLUDED|MDL_CULL_QUERY|MDL_SHADOW|MDL_DYNSHADOW))
    {
        radius = m->boundsphere(0/*frame*/, center, a); // FIXME
        center.add(o);
        if(cull&MDL_CULL_DIST && center.dist(camera1->o)/radius>maxmodelradiusdistance) return;
        if(cull&MDL_CULL_VFC)
        {
            if(reflecting || refracting)
            {
                if(reflecting || refracting>0) 
                {
                    if(center.z+radius<=reflectz) return;
                }
                else
                {
                    if(fogging && center.z+radius<reflectz-waterfog) return;
                    if(!shadow && center.z-radius>=reflectz) return;
                }
                if(center.dist(camera1->o)-radius>reflectdist) return;
            }
            if(isvisiblesphere(radius, center) >= VFC_FOGGED) return;
            if(shadowmapping && !isshadowmapcaster(center, radius)) return;
        }
        if(shadowmapping)
        {
            if(d)
            {
                if(cull&MDL_CULL_OCCLUDED && d->occluded>=OCCLUDE_PARENT) return;
                if(doOQ && d->occluded+1>=OCCLUDE_BB && d->query && d->query->owner==d && checkquery(d->query)) return;
            }
            if(!addshadowmapcaster(center, radius, radius)) return;
        }
        else if(cull&MDL_CULL_OCCLUDED && modeloccluded(center, radius))
        {
            if(!reflecting && !refracting && d)
            {
                d->occluded = OCCLUDE_PARENT;
                if(doOQ) rendermodelquery(m, d, center, radius);
            }
            return;
        }
        else if(doOQ && d && d->query && d->query->owner==d && checkquery(d->query))
        {
            if(!reflecting && !refracting) 
            {
                if(d->occluded<OCCLUDE_BB) d->occluded++;
                rendermodelquery(m, d, center, radius);
            }
            return;
        }
    }
    if(showboundingbox && !shadowmapping)
    {
        if(d && showboundingbox==1) 
        {
            render3dbox(d->o, d->eyeheight, d->aboveeye, d->radius);
            renderellipse(d->o, d->xradius, d->yradius, d->yaw);
        }
        else
        {
            vec center, radius;
            if(showboundingbox==1) m->collisionbox(0, center, radius);
            else m->boundbox(0, center, radius);
            rotatebb(center, radius, int(yaw));
            center.add(o);
            render3dbox(center, radius.z, radius.z, radius.x, radius.y);
        }
    }

    vec lightcolor(1, 1, 1), lightdir(0, 0, 1);
    if(!shadowmapping)
    {
        if(d) 
        {
            if(!reflecting && !refracting) d->occluded = OCCLUDE_NOTHING;
            if(!light) light = &d->light;
            if(cull&MDL_LIGHT && light->millis!=lastmillis)
            {
                lightreaching(d->o, light->color, light->dir);
                dynlightreaching(o, light->color, light->dir);
                cl->lighteffects(d, light->color, light->dir);
                light->millis = lastmillis;
            }
        }
        else if(cull&MDL_LIGHT)
        {
            if(!light) 
            {
                lightreaching(o, lightcolor, lightdir);
                dynlightreaching(o, lightcolor, lightdir);
            }
            else if(light->millis!=lastmillis)
            {
                lightreaching(o, light->color, light->dir);
                dynlightreaching(o, light->color, light->dir);
                light->millis = lastmillis;
            }
        }
        if(light) { lightcolor = light->color; lightdir = light->dir; }
        if(cull&MDL_DYNLIGHT) dynlightreaching(o, lightcolor, lightdir);
    }

    if(a) for(int i = 0; a[i].name; i++)
    {
        a[i].m = loadmodel(a[i].name);
        //if(a[i].m && a[i].m->type()!=m->type()) a[i].m = NULL;
    }

    if(!d || reflecting || refracting || shadowmapping) doOQ = false;
  
    if(numbatches>=0)
    {
        batchedmodel &b = addbatchedmodel(m);
        b.pos = o;
        b.color = lightcolor;
        b.dir = lightdir;
        b.anim = anim;
        b.yaw = yaw;
        b.pitch = pitch;
        b.speed = speed;
        b.basetime = basetime;
        b.cull = cull;
        b.d = d;
        b.attached = a ? modelattached.length() : -1;
        if(a) for(int i = 0;; i++) { modelattached.add(a[i]); if(!a[i].name) break; }
        if(doOQ) d->query = b.query = newquery(d);
        return;
    }

    m->startrender();

    if(shadow && !reflecting && refracting<=0)
    {
        rendershadow(lightdir, m, anim, o, center, radius, yaw, pitch, speed, basetime, d, cull, a);
        if((cull&MDL_CULL_VFC) && refracting<0 && center.z-radius>=reflectz) { m->endrender(); return; }
    }

    if(shadowmapping)
    {
        anim |= ANIM_NOSKIN;
        setenvparamf("shadowintensity", SHPARAM_VERTEX, 1,
            (anim&ANIM_INDEX)==ANIM_DYING ? max(1.0f - (lastmillis - basetime)/1000.0f, 0.0f) : 1.0f);
    }
    else
    {
        if(cull&MDL_TRANSLUCENT) anim |= ANIM_TRANSLUCENT;
        if(cull&MDL_FULLBRIGHT) anim |= ANIM_FULLBRIGHT;
    }

    if(doOQ)
    {
        d->query = newquery(d);
        if(d->query) startquery(d->query);
    }

    m->render(anim, speed, basetime, o, yaw, pitch, d, a, lightcolor, lightdir);

    if(doOQ && d->query) endquery(d->query);

    m->endrender();
}

void abovemodel(vec &o, const char *mdl)
{
    model *m = loadmodel(mdl);
    if(!m) return;
    o.z += m->above(0/*frame*/);
}

bool matchanim(const char *name, const char *pattern)
{
    for(;; pattern++)
    {
        const char *s = name;
        char c;
        for(;; pattern++)
        {
            c = *pattern;
            if(!c || c=='|') break;
            else if(c=='*') 
            {
                if(!*s || isspace(*s)) break;
                do s++; while(*s && !isspace(*s));
            }
            else if(c!=*s) break;
            else s++;
        }
        if(!*s && (!c || c=='|')) return true;
        pattern = strchr(pattern, '|');
        if(!pattern) break;
    }
    return false;
}

void findanims(const char *pattern, vector<int> &anims)
{
    static const char *names[] = 
    { 
        "dead", "dying", "idle", 
        "forward", "backward", "left", "right", 
        "punch", "shoot", "pain", 
        "jump", "sink", "swim", 
        "edit", "lag", "taunt", "win", "lose", 
        "gun shoot", "gun idle",
        "vwep", "shield", "powerup", 
        "mapmodel", "trigger" 
    };
    loopi(sizeof(names)/sizeof(names[0])) if(matchanim(names[i], pattern)) anims.add(i);
}

void loadskin(const char *dir, const char *altdir, Texture *&skin, Texture *&masks) // model skin sharing
{
#define ifnoload(tex, path) if((tex = textureload(path, 0, true, false))==notexture)
#define tryload(tex, path, prefix, name) \
    s_sprintfd(path)("%spackages/models/%s/%s.jpg", prefix, dir, name); \
    ifnoload(tex, path) \
    { \
        strcpy(path+strlen(path)-3, "png"); \
        ifnoload(tex, path) \
        { \
            s_sprintf(path)("%spackages/models/%s/%s.jpg", prefix, altdir, name); \
            ifnoload(tex, path) \
            { \
                strcpy(path+strlen(path)-3, "png"); \
                ifnoload(tex, path) return; \
            } \
        } \
    }
     
    masks = notexture;
    tryload(skin, skinpath, "", "skin");
    tryload(masks, maskspath, "<ffmask:25>", "masks");
}

// convenient function that covers the usual anims for players/monsters/npcs

VAR(animoverride, -1, 0, NUMANIMS-1);
VAR(testanims, 0, 0, 1);
VAR(testpitch, -90, 0, 90);

void renderclient(dynent *d, const char *mdlname, modelattach *attachments, int attack, int attackdelay, int lastaction, int lastpain, float sink)
{
    int anim = ANIM_IDLE|ANIM_LOOP;
    float yaw = d->yaw, pitch = d->pitch;
    vec o(d->o);
    o.z -= d->eyeheight + sink;
    int basetime = 0;
    if(animoverride) anim = (animoverride<0 ? ANIM_ALL : animoverride)|ANIM_LOOP;
    else if(d->state==CS_DEAD)
    {
        pitch = 0;
        anim = ANIM_DYING;
        basetime = lastpain;
        int t = lastmillis-lastpain;
        if(t<0 || t>20000) return;
        if(t>1000) { anim = ANIM_DEAD|ANIM_LOOP; if(t>1600) { t -= 1600; o.z -= t*t/10000000000.0f*t/16.0f; } }
        if(o.z<-1000) return;
    }
    else if(d->state==CS_EDITING || d->state==CS_SPECTATOR) anim = ANIM_EDIT|ANIM_LOOP;
    else if(d->state==CS_LAGGED)                            anim = ANIM_LAG|ANIM_LOOP;
    else
    {
        if(lastmillis-lastpain<300) 
        { 
            anim = ANIM_PAIN;
            basetime = lastpain;
        }
        else if(lastpain < lastaction && (attack<0 || (d->type!=ENT_AI && lastmillis-lastaction<attackdelay)))
        { 
            anim = attack<0 ? -attack : attack; 
            basetime = lastaction; 
        }

        if(d->inwater && d->physstate<=PHYS_FALL) anim |= (((cl->allowmove(d) && (d->move || d->strafe)) || d->vel.z+d->falling.z>0 ? ANIM_SWIM : ANIM_SINK)|ANIM_LOOP)<<ANIM_SECONDARY;
        else if(d->timeinair>100) anim |= (ANIM_JUMP|ANIM_END)<<ANIM_SECONDARY;
        else if(cl->allowmove(d)) 
        {
            if(d->move>0) anim |= (ANIM_FORWARD|ANIM_LOOP)<<ANIM_SECONDARY;
            else if(d->strafe) anim |= ((d->strafe>0 ? ANIM_LEFT : ANIM_RIGHT)|ANIM_LOOP)<<ANIM_SECONDARY;
            else if(d->move<0) anim |= (ANIM_BACKWARD|ANIM_LOOP)<<ANIM_SECONDARY;
        }

        if((anim&ANIM_INDEX)==ANIM_IDLE && (anim>>ANIM_SECONDARY)&ANIM_INDEX) anim >>= ANIM_SECONDARY;
    }
    if(!((anim>>ANIM_SECONDARY)&ANIM_INDEX)) anim |= (ANIM_IDLE|ANIM_LOOP)<<ANIM_SECONDARY;
    int flags = MDL_LIGHT;
    if(d!=player) flags |= MDL_CULL_VFC | MDL_CULL_OCCLUDED | MDL_CULL_QUERY;
    if(d->type==ENT_PLAYER) flags |= MDL_FULLBRIGHT;
    else flags |= MDL_CULL_DIST;
    if(d->state==CS_LAGGED) flags |= MDL_TRANSLUCENT;
    else if((anim&ANIM_INDEX)!=ANIM_DEAD) flags |= MDL_DYNSHADOW;
    rendermodel(NULL, mdlname, anim, o, testanims && d==player ? 0 : yaw+90, testpitch && d==player ? testpitch : pitch, flags, d, attachments, basetime);
}

void setbbfrommodel(dynent *d, const char *mdl)
{
    model *m = loadmodel(mdl); 
    if(!m) return;
    vec center, radius;
    m->collisionbox(0, center, radius);
    if(d->type==ENT_INANIMATE && !m->ellipsecollide)
    {
        d->collidetype = COLLIDE_AABB;
        rotatebb(center, radius, int(d->yaw));
    }
    d->xradius   = radius.x + fabs(center.x);
    d->yradius   = radius.y + fabs(center.y);
    d->radius    = max(d->xradius, d->yradius);
    if(d->collidetype!=COLLIDE_ELLIPSE) d->xradius = d->yradius = d->radius;
    d->eyeheight = (center.z-radius.z) + radius.z*2*m->eyeheight;
    d->aboveeye  = radius.z*2*(1.0f-m->eyeheight);
}