1 files changed, 207 insertions, 0 deletions

diff --git a/apps/plugins/sdl/progs/quake/d_part.c b/apps/plugins/sdl/progs/quake/d_part.c
new file mode 100644
index 0000000000..176b76beab
--- /dev/null
+++ b/apps/plugins/sdl/progs/quake/d_part.c
@@ -0,0 +1,207 @@
+/*
+Copyright (C) 1996-1997 Id Software, Inc.
+
+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.
+
+*/
+// d_part.c: software driver module for drawing particles
+
+#include "quakedef.h"
+#include "d_local.h"
+
+
+/*
+==============
+D_EndParticles
+==============
+*/
+void D_EndParticles (void)
+{
+// not used by software driver
+}
+
+
+/*
+==============
+D_StartParticles
+==============
+*/
+void D_StartParticles (void)
+{
+// not used by software driver
+}
+
+
+#if     !id386
+
+/*
+==============
+D_DrawParticle
+==============
+*/
+void D_DrawParticle (particle_t *pparticle)
+{
+        vec3_t  local, transformed;
+        float   zi;
+        byte    *pdest;
+        short   *pz;
+        int             i, izi, pix, count, u, v;
+
+// transform point
+        VectorSubtract (pparticle->org, r_origin, local);
+
+        transformed[0] = DotProduct(local, r_pright);
+        transformed[1] = DotProduct(local, r_pup);
+        transformed[2] = DotProduct(local, r_ppn);              
+
+        if (transformed[2] < PARTICLE_Z_CLIP)
+                return;
+
+// project the point
+// FIXME: preadjust xcenter and ycenter
+        zi = 1.0 / transformed[2];
+        u = (int)(xcenter + zi * transformed[0] + 0.5);
+        v = (int)(ycenter - zi * transformed[1] + 0.5);
+
+        if ((v > d_vrectbottom_particle) || 
+                (u > d_vrectright_particle) ||
+                (v < d_vrecty) ||
+                (u < d_vrectx))
+        {
+                return;
+        }
+
+        pz = d_pzbuffer + (d_zwidth * v) + u;
+        pdest = d_viewbuffer + d_scantable[v] + u;
+        izi = (int)(zi * 0x8000);
+
+        pix = izi >> d_pix_shift;
+
+        if (pix < d_pix_min)
+                pix = d_pix_min;
+        else if (pix > d_pix_max)
+                pix = d_pix_max;
+
+        switch (pix)
+        {
+        case 1:
+                count = 1 << d_y_aspect_shift;
+
+                for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
+                {
+                        if (pz[0] <= izi)
+                        {
+                                pz[0] = izi;
+                                pdest[0] = pparticle->color;
+                        }
+                }
+                break;
+
+        case 2:
+                count = 2 << d_y_aspect_shift;
+
+                for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
+                {
+                        if (pz[0] <= izi)
+                        {
+                                pz[0] = izi;
+                                pdest[0] = pparticle->color;
+                        }
+
+                        if (pz[1] <= izi)
+                        {
+                                pz[1] = izi;
+                                pdest[1] = pparticle->color;
+                        }
+                }
+                break;
+
+        case 3:
+                count = 3 << d_y_aspect_shift;
+
+                for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
+                {
+                        if (pz[0] <= izi)
+                        {
+                                pz[0] = izi;
+                                pdest[0] = pparticle->color;
+                        }
+
+                        if (pz[1] <= izi)
+                        {
+                                pz[1] = izi;
+                                pdest[1] = pparticle->color;
+                        }
+
+                        if (pz[2] <= izi)
+                        {
+                                pz[2] = izi;
+                                pdest[2] = pparticle->color;
+                        }
+                }
+                break;
+
+        case 4:
+                count = 4 << d_y_aspect_shift;
+
+                for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
+                {
+                        if (pz[0] <= izi)
+                        {
+                                pz[0] = izi;
+                                pdest[0] = pparticle->color;
+                        }
+
+                        if (pz[1] <= izi)
+                        {
+                                pz[1] = izi;
+                                pdest[1] = pparticle->color;
+                        }
+
+                        if (pz[2] <= izi)
+                        {
+                                pz[2] = izi;
+                                pdest[2] = pparticle->color;
+                        }
+
+                        if (pz[3] <= izi)
+                        {
+                                pz[3] = izi;
+                                pdest[3] = pparticle->color;
+                        }
+                }
+                break;
+
+        default:
+                count = pix << d_y_aspect_shift;
+
+                for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
+                {
+                        for (i=0 ; i<pix ; i++)
+                        {
+                                if (pz[i] <= izi)
+                                {
+                                        pz[i] = izi;
+                                        pdest[i] = pparticle->color;
+                                }
+                        }
+                }
+                break;
+        }
+}
+
+#endif  // !id386
+