cg_draw.c

quakeIII源码这个不用我多说吧

lagometer_t		lagometer;

/*
==============
CG_AddLagometerFrameInfo

Adds the current interpolate / extrapolate bar for this frame
==============
*/
void CG_AddLagometerFrameInfo( void ) {
	int			offset;

	offset = cg.time - cg.latestSnapshotTime;
	lagometer.frameSamples[ lagometer.frameCount & ( LAG_SAMPLES - 1) ] = offset;
	lagometer.frameCount++;
}

/*
==============
CG_AddLagometerSnapshotInfo

Each time a snapshot is received, log its ping time and
the number of snapshots that were dropped before it.

Pass NULL for a dropped packet.
==============
*/
void CG_AddLagometerSnapshotInfo( snapshot_t *snap ) {
	// dropped packet
	if ( !snap ) {
		lagometer.snapshotSamples[ lagometer.snapshotCount & ( LAG_SAMPLES - 1) ] = -1;
		lagometer.snapshotCount++;
		return;
	}

	// add this snapshot's info
	lagometer.snapshotSamples[ lagometer.snapshotCount & ( LAG_SAMPLES - 1) ] = snap->ping;
	lagometer.snapshotFlags[ lagometer.snapshotCount & ( LAG_SAMPLES - 1) ] = snap->snapFlags;
	lagometer.snapshotCount++;
}

/*
==============
CG_DrawDisconnect

Should we draw something differnet for long lag vs no packets?
==============
*/
static void CG_DrawDisconnect( void ) {
	float		x, y;
	int			cmdNum;
	usercmd_t	cmd;
	const char		*s;
	int			w;  // bk010215 - FIXME char message[1024];

	// draw the phone jack if we are completely past our buffers
	cmdNum = trap_GetCurrentCmdNumber() - CMD_BACKUP + 1;
	trap_GetUserCmd( cmdNum, &cmd );
	if ( cmd.serverTime <= cg.snap->ps.commandTime
		|| cmd.serverTime > cg.time ) {	// special check for map_restart // bk 0102165 - FIXME
		return;
	}

	// also add text in center of screen
	s = "Connection Interrupted"; // bk 010215 - FIXME
	w = CG_DrawStrlen( s ) * BIGCHAR_WIDTH;
	CG_DrawBigString( 320 - w/2, 100, s, 1.0F);

	// blink the icon
	if ( ( cg.time >> 9 ) & 1 ) {
		return;
	}

	x = 640 - 48;
	y = 480 - 48;

	CG_DrawPic( x, y, 48, 48, trap_R_RegisterShader("gfx/2d/net.tga" ) );
}


#define	MAX_LAGOMETER_PING	900
#define	MAX_LAGOMETER_RANGE	300

/*
==============
CG_DrawLagometer
==============
*/
static void CG_DrawLagometer( void ) {
	int		a, x, y, i;
	float	v;
	float	ax, ay, aw, ah, mid, range;
	int		color;
	float	vscale;

	if ( !cg_lagometer.integer || cgs.localServer ) {
		CG_DrawDisconnect();
		return;
	}

	//
	// draw the graph
	//
#ifdef MISSIONPACK
	x = 640 - 48;
	y = 480 - 144;
#else
	x = 640 - 48;
	y = 480 - 48;
#endif

	trap_R_SetColor( NULL );
	CG_DrawPic( x, y, 48, 48, cgs.media.lagometerShader );

	ax = x;
	ay = y;
	aw = 48;
	ah = 48;
	CG_AdjustFrom640( &ax, &ay, &aw, &ah );

	color = -1;
	range = ah / 3;
	mid = ay + range;

	vscale = range / MAX_LAGOMETER_RANGE;

	// draw the frame interpoalte / extrapolate graph
	for ( a = 0 ; a < aw ; a++ ) {
		i = ( lagometer.frameCount - 1 - a ) & (LAG_SAMPLES - 1);
		v = lagometer.frameSamples[i];
		v *= vscale;
		if ( v > 0 ) {
			if ( color != 1 ) {
				color = 1;
				trap_R_SetColor( g_color_table[ColorIndex(COLOR_YELLOW)] );
			}
			if ( v > range ) {
				v = range;
			}
			trap_R_DrawStretchPic ( ax + aw - a, mid - v, 1, v, 0, 0, 0, 0, cgs.media.whiteShader );
		} else if ( v < 0 ) {
			if ( color != 2 ) {
				color = 2;
				trap_R_SetColor( g_color_table[ColorIndex(COLOR_BLUE)] );
			}
			v = -v;
			if ( v > range ) {
				v = range;
			}
			trap_R_DrawStretchPic( ax + aw - a, mid, 1, v, 0, 0, 0, 0, cgs.media.whiteShader );
		}
	}

	// draw the snapshot latency / drop graph
	range = ah / 2;
	vscale = range / MAX_LAGOMETER_PING;

	for ( a = 0 ; a < aw ; a++ ) {
		i = ( lagometer.snapshotCount - 1 - a ) & (LAG_SAMPLES - 1);
		v = lagometer.snapshotSamples[i];
		if ( v > 0 ) {
			if ( lagometer.snapshotFlags[i] & SNAPFLAG_RATE_DELAYED ) {
				if ( color != 5 ) {
					color = 5;	// YELLOW for rate delay
					trap_R_SetColor( g_color_table[ColorIndex(COLOR_YELLOW)] );
				}
			} else {
				if ( color != 3 ) {
					color = 3;
					trap_R_SetColor( g_color_table[ColorIndex(COLOR_GREEN)] );
				}
			}
			v = v * vscale;
			if ( v > range ) {
				v = range;
			}
			trap_R_DrawStretchPic( ax + aw - a, ay + ah - v, 1, v, 0, 0, 0, 0, cgs.media.whiteShader );
		} else if ( v < 0 ) {
			if ( color != 4 ) {
				color = 4;		// RED for dropped snapshots
				trap_R_SetColor( g_color_table[ColorIndex(COLOR_RED)] );
			}
			trap_R_DrawStretchPic( ax + aw - a, ay + ah - range, 1, range, 0, 0, 0, 0, cgs.media.whiteShader );
		}
	}

	trap_R_SetColor( NULL );

	if ( cg_nopredict.integer || cg_synchronousClients.integer ) {
		CG_DrawBigString( ax, ay, "snc", 1.0 );
	}

	CG_DrawDisconnect();
}



/*
===============================================================================

CENTER PRINTING

===============================================================================
*/


/*
==============
CG_CenterPrint

Called for important messages that should stay in the center of the screen
for a few moments
==============
*/
void CG_CenterPrint( const char *str, int y, int charWidth ) {
	char	*s;

	Q_strncpyz( cg.centerPrint, str, sizeof(cg.centerPrint) );

	cg.centerPrintTime = cg.time;
	cg.centerPrintY = y;
	cg.centerPrintCharWidth = charWidth;

	// count the number of lines for centering
	cg.centerPrintLines = 1;
	s = cg.centerPrint;
	while( *s ) {
		if (*s == '\n')
			cg.centerPrintLines++;
		s++;
	}
}


/*
===================
CG_DrawCenterString
===================
*/
static void CG_DrawCenterString( void ) {
	char	*start;
	int		l;
	int		x, y, w;
#ifdef MISSIONPACK // bk010221 - unused else
  int h;
#endif
	float	*color;

	if ( !cg.centerPrintTime ) {
		return;
	}

	color = CG_FadeColor( cg.centerPrintTime, 1000 * cg_centertime.value );
	if ( !color ) {
		return;
	}

	trap_R_SetColor( color );

	start = cg.centerPrint;

	y = cg.centerPrintY - cg.centerPrintLines * BIGCHAR_HEIGHT / 2;

	while ( 1 ) {
		char linebuffer[1024];

		for ( l = 0; l < 50; l++ ) {
			if ( !start[l] || start[l] == '\n' ) {
				break;
			}
			linebuffer[l] = start[l];
		}
		linebuffer[l] = 0;

#ifdef MISSIONPACK
		w = CG_Text_Width(linebuffer, 0.5, 0);
		h = CG_Text_Height(linebuffer, 0.5, 0);
		x = (SCREEN_WIDTH - w) / 2;
		CG_Text_Paint(x, y + h, 0.5, color, linebuffer, 0, 0, ITEM_TEXTSTYLE_SHADOWEDMORE);
		y += h + 6;
#else
		w = cg.centerPrintCharWidth * CG_DrawStrlen( linebuffer );

		x = ( SCREEN_WIDTH - w ) / 2;

		CG_DrawStringExt( x, y, linebuffer, color, qfalse, qtrue,
			cg.centerPrintCharWidth, (int)(cg.centerPrintCharWidth * 1.5), 0 );

		y += cg.centerPrintCharWidth * 1.5;
#endif
		while ( *start && ( *start != '\n' ) ) {
			start++;
		}
		if ( !*start ) {
			break;
		}
		start++;
	}

	trap_R_SetColor( NULL );
}



/*
================================================================================

CROSSHAIR

================================================================================
*/


/*
=================
CG_DrawCrosshair
=================
*/
static void CG_DrawCrosshair(void) {
	float		w, h;
	qhandle_t	hShader;
	float		f;
	float		x, y;
	int			ca;

	if ( !cg_drawCrosshair.integer ) {
		return;
	}

	if ( cg.snap->ps.persistant[PERS_TEAM] == TEAM_SPECTATOR) {
		return;
	}

	if ( cg.renderingThirdPerson ) {
		return;
	}

	// set color based on health
	if ( cg_crosshairHealth.integer ) {
		vec4_t		hcolor;

		CG_ColorForHealth( hcolor );
		trap_R_SetColor( hcolor );
	} else {
		trap_R_SetColor( NULL );
	}

	w = h = cg_crosshairSize.value;

	// pulse the size of the crosshair when picking up items
	f = cg.time - cg.itemPickupBlendTime;
	if ( f > 0 && f < ITEM_BLOB_TIME ) {
		f /= ITEM_BLOB_TIME;
		w *= ( 1 + f );
		h *= ( 1 + f );
	}

	x = cg_crosshairX.integer;
	y = cg_crosshairY.integer;
	CG_AdjustFrom640( &x, &y, &w, &h );

	ca = cg_drawCrosshair.integer;
	if (ca < 0) {
		ca = 0;
	}
	hShader = cgs.media.crosshairShader[ ca % NUM_CROSSHAIRS ];

	trap_R_DrawStretchPic( x + cg.refdef.x + 0.5 * (cg.refdef.width - w), 
		y + cg.refdef.y + 0.5 * (cg.refdef.height - h), 
		w, h, 0, 0, 1, 1, hShader );
}



/*
=================
CG_ScanForCrosshairEntity
=================
*/
static void CG_ScanForCrosshairEntity( void ) {
	trace_t		trace;
	vec3_t		start, end;
	int			content;

	VectorCopy( cg.refdef.vieworg, start );
	VectorMA( start, 131072, cg.refdef.viewaxis[0], end );

	CG_Trace( &trace, start, vec3_origin, vec3_origin, end, 
		cg.snap->ps.clientNum, CONTENTS_SOLID|CONTENTS_BODY );
	if ( trace.entityNum >= MAX_CLIENTS ) {
		return;
	}

	// if the player is in fog, don't show it
	content = trap_CM_PointContents( trace.endpos, 0 );
	if ( content & CONTENTS_FOG ) {
		return;
	}

	// if the player is invisible, don't show it
	if ( cg_entities[ trace.entityNum ].currentState.powerups & ( 1 << PW_INVIS ) ) {
		return;
	}

	// update the fade timer
	cg.crosshairClientNum = trace.entityNum;
	cg.crosshairClientTime = cg.time;
}


/*
=====================
CG_DrawCrosshairNames
=====================
*/
static void CG_DrawCrosshairNames( void ) {
	float		*color;
	char		*name;
	float		w;

	if ( !cg_drawCrosshair.integer ) {
		return;
	}
	if ( !cg_drawCrosshairNames.integer ) {
		return;
	}
	if ( cg.renderingThirdPerson ) {
		return;
	}

	// scan the known entities to see if the crosshair is sighted on one
	CG_ScanForCrosshairEntity();

	// draw the name of the player being looked at
	color = CG_FadeColor( cg.crosshairClientTime, 1000 );
	if ( !color ) {
		trap_R_SetColor( NULL );
		return;
	}

	name = cgs.clientinfo[ cg.crosshairClientNum ].name;
#ifdef MISSIONPACK
	color[3] *= 0.5f;
	w = CG_Text_Width(name, 0.3f, 0);
	CG_Text_Paint( 320 - w / 2, 190, 0.3f, color, name, 0, 0, ITEM_TEXTSTYLE_SHADOWED);
#else
	w = CG_DrawStrlen( name ) * BIGCHAR_WIDTH;
	CG_DrawBigString( 320 - w / 2, 170, name, color[3] * 0.5f );
#endif
	trap_R_SetColor( NULL );
}


//==============================================================================

/*
=================
CG_DrawSpectator
=================
*/
static void CG_DrawSpectator(void) {
	CG_DrawBigString(320 - 9 * 8, 440, "SPECTATOR", 1.0F);
	if ( cgs.gametype == GT_TOURNAMENT ) {
		CG_DrawBigString(320 - 15 * 8, 460, "waiting to play", 1.0F);
	}
	else if ( cgs.gametype >= GT_TEAM ) {
		CG_DrawBigString(320 - 39 * 8, 460, "press ESC and use the JOIN menu to play", 1.0F);
	}
}

/*
=================
CG_DrawVote
=================
*/
static void CG_DrawVote(void) {
	char	*s;
	int		sec;

	if ( !cgs.voteTime ) {
		return;
	}

	// play a talk beep whenever it is modified
	if ( cgs.voteModified ) {
		cgs.voteModified = qfalse;
		trap_S_StartLocalSound( cgs.media.talkSound, CHAN_LOCAL_SOUND );
	}

	sec = ( VOTE_TIME - ( cg.time - cgs.voteTime ) ) / 1000;
	if ( sec < 0 ) {
		sec = 0;
	}
#ifdef MISSIONPACK
	s = va("VOTE(%i):%s yes:%i no:%i", sec, cgs.voteString, cgs.voteYes, cgs.voteNo);
	CG_DrawSmallString( 0, 58, s, 1.0F );
	s = "or press ESC then click Vote";
	CG_DrawSmallString( 0, 58 + SMALLCHAR_HEIGHT + 2, s, 1.0F );
#else
	s = va("VOTE(%i):%s yes:%i no:%i", sec, cgs.voteString, cgs.voteYes, cgs.voteNo );
	CG_DrawSmallString( 0, 58, s, 1.0F );
#endif
}

/*
=================
CG_DrawTeamVote
=================
*/
static void CG_DrawTeamVote(void) {
	char	*s;
	int		sec, cs_offset;

	if ( cgs.clientinfo->team == TEAM_RED )
		cs_offset = 0;
	else if ( cgs.clientinfo->team == TEAM_BLUE )
		cs_offset = 1;
	else
		return;

	if ( !cgs.teamVoteTime[cs_offset] ) {
		return;
	}

	// play a talk beep whenever it is modified
	if ( cgs.teamVoteModified[cs_offset] ) {
		cgs.teamVoteModified[cs_offset] = qfalse;
		trap_S_StartLocalSound( cgs.media.talkSound, CHAN_LOCAL_SOUND );
	}

	sec = ( VOTE_TIME - ( cg.time - cgs.teamVoteTime[cs_offset] ) ) / 1000;