From 0023db327bc1db00068284b70e1db45857aeee35 Mon Sep 17 00:00:00 2001
From: Travis Bradshaw <travis.bradshaw@idsoftware.com>
Date: Tue, 31 Jan 2012 14:32:09 -0600
Subject: The Quake sources as originally release under the GPL license on
 December 21, 1999

---
 QW/client/r_misc.c | 596 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 596 insertions(+)
 create mode 100644 QW/client/r_misc.c

(limited to 'QW/client/r_misc.c')

diff --git a/QW/client/r_misc.c b/QW/client/r_misc.c
new file mode 100644
index 0000000..eee93d3
--- /dev/null
+++ b/QW/client/r_misc.c
@@ -0,0 +1,596 @@
+/*
+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.
+
+*/
+// r_misc.c
+
+#include "quakedef.h"
+#include "r_local.h"
+
+
+/*
+===============
+R_CheckVariables
+===============
+*/
+void R_CheckVariables (void)
+{
+#if 0
+	static float	oldbright;
+
+	if (r_fullbright.value != oldbright)
+	{
+		oldbright = r_fullbright.value;
+		D_FlushCaches ();	// so all lighting changes
+	}
+#endif
+}
+
+
+/*
+============
+Show
+
+Debugging use
+============
+*/
+void Show (void)
+{
+	vrect_t	vr;
+
+	vr.x = vr.y = 0;
+	vr.width = vid.width;
+	vr.height = vid.height;
+	vr.pnext = NULL;
+	VID_Update (&vr);
+}
+
+/*
+====================
+R_TimeRefresh_f
+
+For program optimization
+====================
+*/
+void R_TimeRefresh_f (void)
+{
+	int			i;
+	float		start, stop, time;
+	int			startangle;
+	vrect_t		vr;
+
+	startangle = r_refdef.viewangles[1];
+	
+	start = Sys_DoubleTime ();
+	for (i=0 ; i<128 ; i++)
+	{
+		r_refdef.viewangles[1] = i/128.0*360.0;
+
+		VID_LockBuffer ();
+
+		R_RenderView ();
+
+		VID_UnlockBuffer ();
+
+		vr.x = r_refdef.vrect.x;
+		vr.y = r_refdef.vrect.y;
+		vr.width = r_refdef.vrect.width;
+		vr.height = r_refdef.vrect.height;
+		vr.pnext = NULL;
+		VID_Update (&vr);
+	}
+	stop = Sys_DoubleTime ();
+	time = stop-start;
+	Con_Printf ("%f seconds (%f fps)\n", time, 128/time);
+	
+	r_refdef.viewangles[1] = startangle;
+}
+
+/*
+================
+R_LineGraph
+
+Only called by R_DisplayTime
+================
+*/
+void R_LineGraph (int x, int y, int h)
+{
+	int		i;
+	byte	*dest;
+	int		s;
+	int		color;
+
+// FIXME: should be disabled on no-buffer adapters, or should be in the driver
+	
+//	x += r_refdef.vrect.x;
+//	y += r_refdef.vrect.y;
+	
+	dest = vid.buffer + vid.rowbytes*y + x;
+	
+	s = r_graphheight.value;
+
+	if (h == 10000)
+		color = 0x6f;	// yellow
+	else if (h == 9999)
+		color = 0x4f;	// red
+	else if (h == 9998)
+		color = 0xd0;	// blue
+	else
+		color = 0xff;	// pink
+
+	if (h>s)
+		h = s;
+	
+	for (i=0 ; i<h ; i++, dest -= vid.rowbytes*2)
+	{
+		dest[0] = color;
+//		*(dest-vid.rowbytes) = 0x30;
+	}
+#if 0
+	for ( ; i<s ; i++, dest -= vid.rowbytes*2)
+	{
+		dest[0] = 0x30;
+		*(dest-vid.rowbytes) = 0x30;
+	}
+#endif
+}
+
+/*
+==============
+R_TimeGraph
+
+Performance monitoring tool
+==============
+*/
+#define	MAX_TIMINGS		100
+extern float mouse_x, mouse_y;
+int		graphval;
+void R_TimeGraph (void)
+{
+	static	int		timex;
+	int		a;
+	float	r_time2;
+	static byte	r_timings[MAX_TIMINGS];
+	int		x;
+	
+	r_time2 = Sys_DoubleTime ();
+
+	a = (r_time2-r_time1)/0.01;
+//a = fabs(mouse_y * 0.05);
+//a = (int)((r_refdef.vieworg[2] + 1024)/1)%(int)r_graphheight.value;
+//a = (int)((pmove.velocity[2] + 500)/10);
+//a = fabs(velocity[0])/20;
+//a = ((int)fabs(origin[0])/8)%20;
+//a = (cl.idealpitch + 30)/5;
+//a = (int)(cl.simangles[YAW] * 64/360) & 63;
+a = graphval;
+
+	r_timings[timex] = a;
+	a = timex;
+
+	if (r_refdef.vrect.width <= MAX_TIMINGS)
+		x = r_refdef.vrect.width-1;
+	else
+		x = r_refdef.vrect.width -
+				(r_refdef.vrect.width - MAX_TIMINGS)/2;
+	do
+	{
+		R_LineGraph (x, r_refdef.vrect.height-2, r_timings[a]);
+		if (x==0)
+			break;		// screen too small to hold entire thing
+		x--;
+		a--;
+		if (a == -1)
+			a = MAX_TIMINGS-1;
+	} while (a != timex);
+
+	timex = (timex+1)%MAX_TIMINGS;
+}
+
+/*
+==============
+R_NetGraph
+==============
+*/
+void R_NetGraph (void)
+{
+	int		a, x, y, y2, w, i;
+	frame_t	*frame;
+	int lost;
+	char st[80];
+
+	if (vid.width - 16 <= NET_TIMINGS)
+		w = vid.width - 16;
+	else
+		w = NET_TIMINGS;
+
+	x =	-((vid.width - 320)>>1);
+	y = vid.height - sb_lines - 24 - (int)r_graphheight.value*2 - 2;
+
+	M_DrawTextBox (x, y, (w+7)/8, ((int)r_graphheight.value*2+7)/8 + 1);
+	y2 = y + 8;
+	y = vid.height - sb_lines - 8 - 2;
+
+	x = 8;
+	lost = CL_CalcNet();
+	for (a=NET_TIMINGS-w ; a<w ; a++)
+	{
+		i = (cls.netchan.outgoing_sequence-a) & NET_TIMINGSMASK;
+		R_LineGraph (x+w-1-a, y, packet_latency[i]);
+	}
+	sprintf(st, "%3i%% packet loss", lost);
+	Draw_String(8, y2, st);
+}
+
+/*
+==============
+R_ZGraph
+==============
+*/
+void R_ZGraph (void)
+{
+	int		a, x, w, i;
+	static	int	height[256];
+
+	if (r_refdef.vrect.width <= 256)
+		w = r_refdef.vrect.width;
+	else
+		w = 256;
+
+	height[r_framecount&255] = ((int)r_origin[2]) & 31;
+
+	x = 0;
+	for (a=0 ; a<w ; a++)
+	{
+		i = (r_framecount-a) & 255;
+		R_LineGraph (x+w-1-a, r_refdef.vrect.height-2, height[i]);
+	}
+}
+
+/*
+=============
+R_PrintTimes
+=============
+*/
+void R_PrintTimes (void)
+{
+	float	r_time2;
+	float		ms;
+
+	r_time2 = Sys_DoubleTime ();
+
+	ms = 1000* (r_time2 - r_time1);
+	
+	Con_Printf ("%5.1f ms %3i/%3i/%3i poly %3i surf\n",
+				ms, c_faceclip, r_polycount, r_drawnpolycount, c_surf);
+	c_surf = 0;
+}
+
+
+/*
+=============
+R_PrintDSpeeds
+=============
+*/
+void R_PrintDSpeeds (void)
+{
+	float	ms, dp_time, r_time2, rw_time, db_time, se_time, de_time, dv_time;
+
+	r_time2 = Sys_DoubleTime ();
+
+	dp_time = (dp_time2 - dp_time1) * 1000;
+	rw_time = (rw_time2 - rw_time1) * 1000;
+	db_time = (db_time2 - db_time1) * 1000;
+	se_time = (se_time2 - se_time1) * 1000;
+	de_time = (de_time2 - de_time1) * 1000;
+	dv_time = (dv_time2 - dv_time1) * 1000;
+	ms = (r_time2 - r_time1) * 1000;
+
+	Con_Printf ("%3i %4.1fp %3iw %4.1fb %3is %4.1fe %4.1fv\n",
+				(int)ms, dp_time, (int)rw_time, db_time, (int)se_time, de_time,
+				dv_time);
+}
+
+
+/*
+=============
+R_PrintAliasStats
+=============
+*/
+void R_PrintAliasStats (void)
+{
+	Con_Printf ("%3i polygon model drawn\n", r_amodels_drawn);
+}
+
+
+void WarpPalette (void)
+{
+	int		i,j;
+	byte	newpalette[768];
+	int		basecolor[3];
+	
+	basecolor[0] = 130;
+	basecolor[1] = 80;
+	basecolor[2] = 50;
+
+// pull the colors halfway to bright brown
+	for (i=0 ; i<256 ; i++)
+	{
+		for (j=0 ; j<3 ; j++)
+		{
+			newpalette[i*3+j] = (host_basepal[i*3+j] + basecolor[j])/2;
+		}
+	}
+	
+	VID_ShiftPalette (newpalette);
+}
+
+
+/*
+===================
+R_TransformFrustum
+===================
+*/
+void R_TransformFrustum (void)
+{
+	int		i;
+	vec3_t	v, v2;
+	
+	for (i=0 ; i<4 ; i++)
+	{
+		v[0] = screenedge[i].normal[2];
+		v[1] = -screenedge[i].normal[0];
+		v[2] = screenedge[i].normal[1];
+
+		v2[0] = v[1]*vright[0] + v[2]*vup[0] + v[0]*vpn[0];
+		v2[1] = v[1]*vright[1] + v[2]*vup[1] + v[0]*vpn[1];
+		v2[2] = v[1]*vright[2] + v[2]*vup[2] + v[0]*vpn[2];
+
+		VectorCopy (v2, view_clipplanes[i].normal);
+
+		view_clipplanes[i].dist = DotProduct (modelorg, v2);
+	}
+}
+
+
+#if !id386
+
+/*
+================
+TransformVector
+================
+*/
+void TransformVector (vec3_t in, vec3_t out)
+{
+	out[0] = DotProduct(in,vright);
+	out[1] = DotProduct(in,vup);
+	out[2] = DotProduct(in,vpn);		
+}
+
+#endif
+
+
+/*
+================
+R_TransformPlane
+================
+*/
+void R_TransformPlane (mplane_t *p, float *normal, float *dist)
+{
+	float	d;
+	
+	d = DotProduct (r_origin, p->normal);
+	*dist = p->dist - d;
+// TODO: when we have rotating entities, this will need to use the view matrix
+	TransformVector (p->normal, normal);
+}
+
+
+/*
+===============
+R_SetUpFrustumIndexes
+===============
+*/
+void R_SetUpFrustumIndexes (void)
+{
+	int		i, j, *pindex;
+
+	pindex = r_frustum_indexes;
+
+	for (i=0 ; i<4 ; i++)
+	{
+		for (j=0 ; j<3 ; j++)
+		{
+			if (view_clipplanes[i].normal[j] < 0)
+			{
+				pindex[j] = j;
+				pindex[j+3] = j+3;
+			}
+			else
+			{
+				pindex[j] = j+3;
+				pindex[j+3] = j;
+			}
+		}
+
+	// FIXME: do just once at start
+		pfrustum_indexes[i] = pindex;
+		pindex += 6;
+	}
+}
+
+
+/*
+===============
+R_SetupFrame
+===============
+*/
+void R_SetupFrame (void)
+{
+	int				edgecount;
+	vrect_t			vrect;
+	float			w, h;
+
+// don't allow cheats in multiplayer
+r_draworder.value = 0;
+r_fullbright.value = 0;
+r_ambient.value = 0;
+r_drawflat.value = 0;
+
+	if (r_numsurfs.value)
+	{
+		if ((surface_p - surfaces) > r_maxsurfsseen)
+			r_maxsurfsseen = surface_p - surfaces;
+
+		Con_Printf ("Used %d of %d surfs; %d max\n", surface_p - surfaces,
+				surf_max - surfaces, r_maxsurfsseen);
+	}
+
+	if (r_numedges.value)
+	{
+		edgecount = edge_p - r_edges;
+
+		if (edgecount > r_maxedgesseen)
+			r_maxedgesseen = edgecount;
+
+		Con_Printf ("Used %d of %d edges; %d max\n", edgecount,
+				r_numallocatededges, r_maxedgesseen);
+	}
+
+	r_refdef.ambientlight = r_ambient.value;
+
+	if (r_refdef.ambientlight < 0)
+		r_refdef.ambientlight = 0;
+
+//	if (!sv.active)
+		r_draworder.value = 0;	// don't let cheaters look behind walls
+		
+	R_CheckVariables ();
+	
+	R_AnimateLight ();
+
+	r_framecount++;
+
+	numbtofpolys = 0;
+
+// debugging
+#if 0
+r_refdef.vieworg[0]=  80;
+r_refdef.vieworg[1]=      64;
+r_refdef.vieworg[2]=      40;
+r_refdef.viewangles[0]=    0;
+r_refdef.viewangles[1]=    46.763641357;
+r_refdef.viewangles[2]=    0;
+#endif
+
+// build the transformation matrix for the given view angles
+	VectorCopy (r_refdef.vieworg, modelorg);
+	VectorCopy (r_refdef.vieworg, r_origin);
+
+	AngleVectors (r_refdef.viewangles, vpn, vright, vup);
+
+// current viewleaf
+	r_oldviewleaf = r_viewleaf;
+	r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
+
+	r_dowarpold = r_dowarp;
+	r_dowarp = r_waterwarp.value && (r_viewleaf->contents <= CONTENTS_WATER);
+
+	if ((r_dowarp != r_dowarpold) || r_viewchanged)
+	{
+		if (r_dowarp)
+		{
+			if ((vid.width <= vid.maxwarpwidth) &&
+				(vid.height <= vid.maxwarpheight))
+			{
+				vrect.x = 0;
+				vrect.y = 0;
+				vrect.width = vid.width;
+				vrect.height = vid.height;
+
+				R_ViewChanged (&vrect, sb_lines, vid.aspect);
+			}
+			else
+			{
+				w = vid.width;
+				h = vid.height;
+
+				if (w > vid.maxwarpwidth)
+				{
+					h *= (float)vid.maxwarpwidth / w;
+					w = vid.maxwarpwidth;
+				}
+
+				if (h > vid.maxwarpheight)
+				{
+					h = vid.maxwarpheight;
+					w *= (float)vid.maxwarpheight / h;
+				}
+
+				vrect.x = 0;
+				vrect.y = 0;
+				vrect.width = (int)w;
+				vrect.height = (int)h;
+
+				R_ViewChanged (&vrect,
+							   (int)((float)sb_lines * (h/(float)vid.height)),
+							   vid.aspect * (h / w) *
+								 ((float)vid.width / (float)vid.height));
+			}
+		}
+		else
+		{
+			vrect.x = 0;
+			vrect.y = 0;
+			vrect.width = vid.width;
+			vrect.height = vid.height;
+
+			R_ViewChanged (&vrect, sb_lines, vid.aspect);
+		}
+
+		r_viewchanged = false;
+	}
+
+// start off with just the four screen edge clip planes
+	R_TransformFrustum ();
+
+// save base values
+	VectorCopy (vpn, base_vpn);
+	VectorCopy (vright, base_vright);
+	VectorCopy (vup, base_vup);
+	VectorCopy (modelorg, base_modelorg);
+
+	R_SetSkyFrame ();
+
+	R_SetUpFrustumIndexes ();
+
+	r_cache_thrash = false;
+
+// clear frame counts
+	c_faceclip = 0;
+	d_spanpixcount = 0;
+	r_polycount = 0;
+	r_drawnpolycount = 0;
+	r_wholepolycount = 0;
+	r_amodels_drawn = 0;
+	r_outofsurfaces = 0;
+	r_outofedges = 0;
+
+	D_SetupFrame ();
+}
+
-- 
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