raze-gles/source/core/rendering/scene/hw_sprites.cpp

#if 0
void polymost_drawsprite(int32_t snum)
{

    vec2_t off = { 0, 0 };

    if ((globalorientation & 48) != 48)  // only non-voxel sprites should do this
    {
        int const flag = hw_hightile && TileFiles.tiledata[globalpicnum].h_xsize;
        off = { (int32_t)tspr->xoffset + (flag ? TileFiles.tiledata[globalpicnum].h_xoffs : tileLeftOffset(globalpicnum)),
                (int32_t)tspr->yoffset + (flag ? TileFiles.tiledata[globalpicnum].h_yoffs : tileTopOffset(globalpicnum)) };
    }

    int32_t method = DAMETH_MASK | DAMETH_CLAMPED;

    if (tspr->cstat & 2)
        method = DAMETH_CLAMPED | ((tspr->cstat & 512) ? DAMETH_TRANS2 : DAMETH_TRANS1);

    SetRenderStyleFromBlend(!!(tspr->cstat & 2), tspr->blend, !!(tspr->cstat & 512));

    drawpoly_alpha = spriteext[spritenum].alpha;
    drawpoly_blend = tspr->blend;

    sec = (usectorptr_t)&sector[tspr->sectnum];


    vec3_t pos = tspr->pos;


    vec2_t tsiz;

    if (hw_hightile && TileFiles.tiledata[globalpicnum].h_xsize)
        tsiz = { TileFiles.tiledata[globalpicnum].h_xsize, TileFiles.tiledata[globalpicnum].h_ysize };
    else 
        tsiz = { tileWidth(globalpicnum), tileHeight(globalpicnum) };

    if (tsiz.x <= 0 || tsiz.y <= 0)
        return;

    vec2f_t const ftsiz = { (float) tsiz.x, (float) tsiz.y };

    switch ((globalorientation >> 4) & 3)
    {
        case 0:  // Face sprite
        {
            // Project 3D to 2D
            if (globalorientation & 4)
                off.x = -off.x;
            // NOTE: yoff not negated not for y flipping, unlike wall and floor
            // aligned sprites.

            int const ang = (getangle(tspr->x - globalposx, tspr->y - globalposy) + 1024) & 2047;

            float foffs = TSPR_OFFSET(tspr);
            float foffs2 = TSPR_OFFSET(tspr);
			if (fabs(foffs2) < fabs(foffs)) foffs = foffs2;

            vec2f_t const offs = { float(bcosf(ang, -6) * foffs), float(bsinf(ang, -6) * foffs) };

            vec2f_t s0 = { (float)(tspr->x - globalposx) + offs.x,
                           (float)(tspr->y - globalposy) + offs.y};

            vec2f_t p0 = { s0.y * gcosang - s0.x * gsinang, s0.x * gcosang2 + s0.y * gsinang2 };

            if (p0.y <= SCISDIST)
                goto _drawsprite_return;

            float const ryp0 = 1.f / p0.y;
            s0 = { ghalfx * p0.x * ryp0 + ghalfx, ((float)(pos.z - globalposz)) * gyxscale * ryp0 + ghoriz };

            float const f = ryp0 * fxdimen * (1.0f / 160.f);

            vec2f_t ff = { ((float)tspr->xrepeat) * f,
                           ((float)tspr->yrepeat) * f * ((float)yxaspect * (1.0f / 65536.f)) };

            if (tsiz.x & 1)
                s0.x += ff.x * 0.5f;
            if (globalorientation & 128 && tsiz.y & 1)
                s0.y += ff.y * 0.5f;

            s0.x -= ff.x * (float) off.x;
            s0.y -= ff.y * (float) off.y;

            ff.x *= ftsiz.x;
            ff.y *= ftsiz.y;

            vec2f_t pxy[4];

            pxy[0].x = pxy[3].x = s0.x - ff.x * 0.5f;
            pxy[1].x = pxy[2].x = s0.x + ff.x * 0.5f;
            if (!(globalorientation & 128))
            {
                pxy[0].y = pxy[1].y = s0.y - ff.y;
                pxy[2].y = pxy[3].y = s0.y;
            }
            else
            {
                pxy[0].y = pxy[1].y = s0.y - ff.y * 0.5f;
                pxy[2].y = pxy[3].y = s0.y + ff.y * 0.5f;
            }

            xtex.d = ytex.d = ytex.u = xtex.v = 0;
            otex.d = ryp0 * gviewxrange;

            if (!(globalorientation & 4))
            {
                xtex.u = ftsiz.x * otex.d / (pxy[1].x - pxy[0].x + .002f);
                otex.u = -xtex.u * (pxy[0].x - .001f);
            }
            else
            {
                xtex.u = ftsiz.x * otex.d / (pxy[0].x - pxy[1].x - .002f);
                otex.u = -xtex.u * (pxy[1].x + .001f);
            }

            if (!(globalorientation & 8))
            {
                ytex.v = ftsiz.y * otex.d / (pxy[3].y - pxy[0].y + .002f);
                otex.v = -ytex.v * (pxy[0].y - .001f);
            }
            else
            {
                ytex.v = ftsiz.y * otex.d / (pxy[0].y - pxy[3].y - .002f);
                otex.v = -ytex.v * (pxy[3].y + .001f);
            }

            // Clip sprites to ceilings/floors when no parallaxing and not sloped
            if (!(sector[tspr->sectnum].ceilingstat & 3))
            {
                s0.y = ((float) (sector[tspr->sectnum].ceilingz - globalposz)) * gyxscale * ryp0 + ghoriz;
                if (pxy[0].y < s0.y)
                    pxy[0].y = pxy[1].y = s0.y;
            }

            if (!(sector[tspr->sectnum].floorstat & 3))
            {
                s0.y = ((float) (sector[tspr->sectnum].floorz - globalposz)) * gyxscale * ryp0 + ghoriz;
                if (pxy[2].y > s0.y)
                    pxy[2].y = pxy[3].y = s0.y;
            }

            vec2_16_t tempsiz = { (int16_t)tsiz.x, (int16_t)tsiz.y };
            pow2xsplit = 0;
            polymost_drawpoly(pxy, 4, method, tempsiz);

            drawpoly_srepeat = 0;
            drawpoly_trepeat = 0;
        }
        break;

    }

    if (automapping == 1 && (unsigned)spritenum < MAXSPRITES)
        show2dsprite.Set(spritenum);

_drawsprite_return:
    ;
}
#endif