Quake: attempt 2duke3d

Change-Id: I4285036e967d7f0722802d43cf2096c808ca5799

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 0000000..176b76b
--- /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
+