halflife-photomode/pm_shared/pm_debug.cpp

/***
*
*	Copyright (c) 1996-2002, Valve LLC. All rights reserved.
*	
*	This product contains software technology licensed from Id 
*	Software, Inc. ("Id Technology").  Id Technology (c) 1996 Id Software, Inc. 
*	All Rights Reserved.
*
*   Use, distribution, and modification of this source code and/or resulting
*   object code is restricted to non-commercial enhancements to products from
*   Valve LLC.  All other use, distribution, or modification is prohibited
*   without written permission from Valve LLC.
*
****/

#include "Platform.h"
#include "mathlib.h"
#include "const.h"
#include "usercmd.h"
#include "pm_defs.h"
#include "pm_shared.h"
#include "pm_movevars.h"
#include "pm_debug.h"

#include <string.h>

#pragma warning(disable : 4244)
#pragma warning(disable : 4305)

extern playermove_t* pmove;

// Expand debugging BBOX particle hulls by this many units.
#define BOX_GAP 0.0f

static int PM_boxpnt[6][4] =
	{
		{0, 4, 6, 2}, // +X
		{0, 1, 5, 4}, // +Y
		{0, 2, 3, 1}, // +Z
		{7, 5, 1, 3}, // -X
		{7, 3, 2, 6}, // -Y
		{7, 6, 4, 5}, // -Z
};

void PM_ShowClipBox()
{
#if defined(_DEBUG)
	Vector org;
	Vector offset = {0, 0, 0};

	if (0 == pmove->runfuncs)
		return;

	// More debugging, draw the particle bbox for player and for the entity we are looking directly at.
	//  aslo prints entity info to the console overlay.
	//if ( !pmove->server )
	//	return;

	// Draw entity in center of view
	// Also draws the normal to the clip plane that intersects our movement ray.  Leaves a particle
	//  trail at the intersection point.
	PM_ViewEntity();

	VectorCopy(pmove->origin, org);

	if (0 != pmove->server)
	{
		VectorAdd(org, offset, org);
	}
	else
	{
		VectorSubtract(org, offset, org);
	}

	// Show our BBOX in particles.
	PM_DrawBBox(pmove->player_mins[pmove->usehull], pmove->player_maxs[pmove->usehull], org, 0 != pmove->server ? 132 : 0, 0.1);

	PM_ParticleLine(org, org, 0 != pmove->server ? 132 : 0, 0.1, 5.0);
/*
	{
		int i;
		for ( i = 0; i < pmove->numphysent; i++ )
		{
			if ( pmove->physents[ i ].info >= 1 && pmove->physents[ i ].info <= 4 )
			{
			 	PM_DrawBBox( pmove->player_mins[pmove->usehull], pmove->player_maxs[pmove->usehull], pmove->physents[i].origin, 132, 0.1 );
			}
		}
	}
*/
#endif
}

/*
===============
PM_ParticleLine(Vector start, Vector end, int color, float life)

================
*/
void PM_ParticleLine(Vector start, Vector end, int pcolor, float life, float vert)
{
	float linestep = 2.0f;
	float curdist;
	float len;
	Vector curpos;
	Vector diff;
	int i;
	// Determine distance;

	VectorSubtract(end, start, diff);

	len = VectorNormalize(diff);

	curdist = 0;
	while (curdist <= len)
	{
		for (i = 0; i < 3; i++)
			curpos[i] = start[i] + curdist * diff[i];

		pmove->PM_Particle(curpos, pcolor, life, 0, vert);
		curdist += linestep;
	}
}

/*
================
PM_DrawRectangle(Vector tl, Vector br)

================
*/
void PM_DrawRectangle(Vector tl, Vector bl, Vector tr, Vector br, int pcolor, float life)
{
	PM_ParticleLine(tl, bl, pcolor, life, 0);
	PM_ParticleLine(bl, br, pcolor, life, 0);
	PM_ParticleLine(br, tr, pcolor, life, 0);
	PM_ParticleLine(tr, tl, pcolor, life, 0);
}

/*
================
PM_DrawPhysEntBBox(int num)

================
*/
void PM_DrawPhysEntBBox(int num, int pcolor, float life)
{
	physent_t* pe;
	Vector org;
	int j;
	Vector tmp;
	Vector p[8];
	float gap = BOX_GAP;
	Vector modelmins, modelmaxs;

	if (num >= pmove->numphysent ||
		num <= 0)
		return;

	pe = &pmove->physents[num];

	if (pe->model)
	{
		VectorCopy(pe->origin, org);

		pmove->PM_GetModelBounds(pe->model, modelmins, modelmaxs);
		for (j = 0; j < 8; j++)
		{
			tmp[0] = (j & 1) != 0 ? modelmins[0] - gap : modelmaxs[0] + gap;
			tmp[1] = (j & 2) != 0 ? modelmins[1] - gap : modelmaxs[1] + gap;
			tmp[2] = (j & 4) != 0 ? modelmins[2] - gap : modelmaxs[2] + gap;

			VectorCopy(tmp, p[j]);
		}

		// If the bbox should be rotated, do that
		if (pe->angles != g_vecZero)
		{
			Vector forward, right, up;

			AngleVectorsTranspose(pe->angles, &forward, &right, &up);
			for (j = 0; j < 8; j++)
			{
				VectorCopy(p[j], tmp);
				p[j][0] = DotProduct(tmp, forward);
				p[j][1] = DotProduct(tmp, right);
				p[j][2] = DotProduct(tmp, up);
			}
		}

		// Offset by entity origin, if any.
		for (j = 0; j < 8; j++)
			VectorAdd(p[j], org, p[j]);

		for (j = 0; j < 6; j++)
		{
			PM_DrawRectangle(
				p[PM_boxpnt[j][1]],
				p[PM_boxpnt[j][0]],
				p[PM_boxpnt[j][2]],
				p[PM_boxpnt[j][3]],
				pcolor, life);
		}
	}
	else
	{
		for (j = 0; j < 8; j++)
		{
			tmp[0] = (j & 1) != 0 ? pe->mins[0] : pe->maxs[0];
			tmp[1] = (j & 2) != 0 ? pe->mins[1] : pe->maxs[1];
			tmp[2] = (j & 4) != 0 ? pe->mins[2] : pe->maxs[2];

			VectorAdd(tmp, pe->origin, tmp);
			VectorCopy(tmp, p[j]);
		}

		for (j = 0; j < 6; j++)
		{
			PM_DrawRectangle(
				p[PM_boxpnt[j][1]],
				p[PM_boxpnt[j][0]],
				p[PM_boxpnt[j][2]],
				p[PM_boxpnt[j][3]],
				pcolor, life);
		}
	}
}

/*
================
PM_DrawBBox(Vector mins, Vector maxs, Vector origin, int pcolor, float life)

================
*/
void PM_DrawBBox(Vector mins, Vector maxs, Vector origin, int pcolor, float life)
{
	int j;

	Vector tmp;
	Vector p[8];
	float gap = BOX_GAP;

	for (j = 0; j < 8; j++)
	{
		tmp[0] = (j & 1) != 0 ? mins[0] - gap : maxs[0] + gap;
		tmp[1] = (j & 2) != 0 ? mins[1] - gap : maxs[1] + gap;
		tmp[2] = (j & 4) != 0 ? mins[2] - gap : maxs[2] + gap;

		VectorAdd(tmp, origin, tmp);
		VectorCopy(tmp, p[j]);
	}

	for (j = 0; j < 6; j++)
	{
		PM_DrawRectangle(
			p[PM_boxpnt[j][1]],
			p[PM_boxpnt[j][0]],
			p[PM_boxpnt[j][2]],
			p[PM_boxpnt[j][3]],
			pcolor, life);
	}
}

/*
================
PM_ViewEntity

Shows a particle trail from player to entity in crosshair.
Shows particles at that entities bbox

Tries to shoot a ray out by about 128 units.
================
*/
void PM_ViewEntity()
{
	Vector forward, right, up;
	float raydist = 256.0f;
	Vector origin;
	Vector end;
	int i;
	pmtrace_t trace;
	int pcolor = 77;
	float fup;

#if 0
	if ( !pm_showclip.value )
		return;
#endif

	AngleVectors(pmove->angles, &forward, &right, &up); // Determine movement angles

	VectorCopy(pmove->origin, origin);

	fup = 0.5 * (pmove->player_mins[pmove->usehull][2] + pmove->player_maxs[pmove->usehull][2]);
	fup += pmove->view_ofs[2];
	fup -= 4;

	for (i = 0; i < 3; i++)
	{
		end[i] = origin[i] + raydist * forward[i];
	}

	trace = pmove->PM_PlayerTrace(origin, end, PM_STUDIO_BOX, -1);

	if (trace.ent > 0) // Not the world
	{
		pcolor = 111;
	}

	// Draw the hull or bbox.
	if (trace.ent > 0)
	{
		PM_DrawPhysEntBBox(trace.ent, pcolor, 0.3f);
	}
}