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d_part.c
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d_part.c
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/* Copyright (C) 1996-1997 Id Software, Inc.
Copyright (C) 1999-2012 other authors as noted in code comments
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 3 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_DrawParticle
==============
*/
void D_DrawParticle_33_C (particle_t *pparticle) // Manoel Kasimier
{
vec3_t local, transformed;
float zi;
byte *pdest;
short *pz;
int i, izi, pix, count, u, v;
static int pcolor; //qb: save some lookups
pcolor = pparticle->color;
// transform point
VectorSubtract (pparticle->org, r_origin, local);
transformed[2] = DotProduct(local, r_ppn);
if (transformed[2] < PARTICLE_Z_CLIP)
return;
transformed[0] = DotProduct(local, r_pright);
transformed[1] = DotProduct(local, r_pup);
// 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);
izi = (int)(zi * 0x8000);
//qb: better pix calc from MK 1.4. Code stripped down for square pixels and no aspect adjust.
d_pix_shift = 8 - (int) ( ( (float) r_refdef.vrect.width) / ( (1.0f / 320.0f) * (float) vid.width));
pix = (double) ( (int) ( (float) izi * fovscale * r_part_scale.value * ( (float) vid.width / 50.0 )) >> d_pix_shift);
if (pix < d_pix_min)
pix = d_pix_min;
else if (pix > (d_pix_max))
pix = (int)(d_pix_max);
if ((v > (d_vrectbottom_particle - (pix << d_y_aspect_shift))) || // Manoel Kasimier - FOV-based scaling - fixed
(u > (d_vrectright_particle - pix)) || // Manoel Kasimier - FOV-based scaling - fixed
(v < d_vrecty) ||
(u < d_vrectx))
{
return;
}
pz = d_pzbuffer + (d_zwidth * v) + u;
pdest = d_viewbuffer + d_scantable[v] + u;
// Manoel Kasimier - begin
if (pix == 1)
{
if (pz[0] <= izi)
{
pz[0] = izi;
pdest[0] = alphamap[(int)(pdest[0]*256 + pcolor)];
}
}
else if (pix == 2)
{
if (pz[0] <= izi)
{
pz[0] = izi;
pdest[0] = alphamap[(int)pdest[0]*256 + pcolor];
pz[1] = izi;
pdest[1] = alphamap[(int)pdest[1]*256 + pcolor];
pz[d_zwidth] = izi;
pdest[screenwidth] = alphamap[(int)pdest[screenwidth]*256 + pcolor];
pz[d_zwidth+1] = izi;
pdest[screenwidth+1] = alphamap[(int)pdest[screenwidth+1]*256 + pcolor];
}
}
else
{
if (pz[pix/2] <= izi)
{
count = pix;
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
for (i=0 ; i<pix ; i++)
{
pz[i] = izi;
pdest[i] = alphamap[(int)pdest[i]*256 + pcolor];
}
}
}
// Manoel Kasimier - end
}
void D_DrawParticle_50_C (particle_t *pparticle) //qb: 50%
{
vec3_t local, transformed;
float zi;
byte *pdest;
short *pz;
int i, izi, pix, count, u, v;
static int pcolor; //qb: save some lookups
pcolor = pparticle->color;
// transform point
VectorSubtract (pparticle->org, r_origin, local);
transformed[2] = DotProduct(local, r_ppn);
if (transformed[2] < PARTICLE_Z_CLIP)
return;
transformed[0] = DotProduct(local, r_pright);
transformed[1] = DotProduct(local, r_pup);
// 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);
izi = (int)(zi * 0x8000);
d_pix_shift = 8 - (int) ( ( (float) r_refdef.vrect.width) / ( (1.0f / 320.0f) * (float) vid.width));
pix = (double) ( (int) ( (float) izi * fovscale * r_part_scale.value * ( (float) vid.width / 50.0 )) >> d_pix_shift);
if (pix < d_pix_min)
pix = d_pix_min;
else if (pix > (d_pix_max))
pix = (int)(d_pix_max);
if ((v > (d_vrectbottom_particle - (pix << d_y_aspect_shift))) || // Manoel Kasimier - FOV-based scaling - fixed
(u > (d_vrectright_particle - pix)) || // Manoel Kasimier - FOV-based scaling - fixed
(v < d_vrecty) ||
(u < d_vrectx))
{
return;
}
pz = d_pzbuffer + (d_zwidth * v) + u;
pdest = d_viewbuffer + d_scantable[v] + u;
// Manoel Kasimier - begin
if (pix == 1)
{
if (pz[0] <= izi)
{
pz[0] = izi;
pdest[0] = alpha50map[(int)pdest[0]*256 + pcolor];
}
}
else if (pix == 2)
{
if (pz[0] <= izi)
{
pz[0] = izi;
pdest[0] = alpha50map[(int)pdest[0]*256 + pcolor];
pz[1] = izi;
pdest[1] = alpha50map[(int)pdest[1]*256 + pcolor];
pz[d_zwidth] = izi;
pdest[screenwidth] = alpha50map[(int)pdest[screenwidth]*256 + pcolor];
pz[d_zwidth+1] = izi;
pdest[screenwidth+1] = alpha50map[(int)pdest[screenwidth+1]*256 + pcolor];
}
}
else
{
if (pz[pix/2] <= izi)
{
count = pix;
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
for (i=0 ; i<pix ; i++)
{
pz[i] = izi;
pdest[i] = alpha50map[(int)pdest[i]*256 + pcolor];
}
}
}
// Manoel Kasimier - end
}
void D_DrawParticle_66_C (particle_t *pparticle) // Manoel Kasimier
{
vec3_t local, transformed;
float zi;
byte *pdest;
short *pz;
int i, izi, pix, count, u, v;
static int pcolor; //qb: save some lookups
pcolor = pparticle->color;
// transform point
VectorSubtract (pparticle->org, r_origin, local);
transformed[2] = DotProduct(local, r_ppn);
if (transformed[2] < PARTICLE_Z_CLIP)
return;
transformed[0] = DotProduct(local, r_pright);
transformed[1] = DotProduct(local, r_pup);
// 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);
izi = (int)(zi * 0x8000);
d_pix_shift = 8 - (int) ( ( (float) r_refdef.vrect.width) / ( (1.0f / 320.0f) * (float) vid.width));
pix = (double) ( (int) ( (float) izi * fovscale * r_part_scale.value * ( (float) vid.width / 50.0 )) >> d_pix_shift);
if (pix < d_pix_min)
pix = d_pix_min;
else if (pix > (d_pix_max))
pix = (int)(d_pix_max);
if ((v > (d_vrectbottom_particle - (pix << d_y_aspect_shift))) || // Manoel Kasimier - FOV-based scaling - fixed
(u > (d_vrectright_particle - pix)) || // Manoel Kasimier - FOV-based scaling - fixed
(v < d_vrecty) ||
(u < d_vrectx))
{
return;
}
pz = d_pzbuffer + (d_zwidth * v) + u;
pdest = d_viewbuffer + d_scantable[v] + u;
// Manoel Kasimier - begin
if (pix == 1)
{
if (pz[0] <= izi)
{
pz[0] = izi;
pdest[0] = alphamap[(int)(pparticle->color + pdest[0]*256)];
}
}
else if (pix == 2)
{
if (pz[0] <= izi)
{
pz[0] = izi;
pdest[0] = alphamap[(int)pdest[0] + pcolor*256];
pz[1] = izi;
pdest[1] = alphamap[(int)pdest[1] + pcolor*256];
pz[d_zwidth] = izi;
pdest[screenwidth] = alphamap[(int)pdest[screenwidth] + pcolor*256];
pz[d_zwidth+1] = izi;
pdest[screenwidth+1] = alphamap[(int)pdest[screenwidth+1] + pcolor*256];
}
}
else
{
if (pz[pix/2] <= izi)
{
count = pix;
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
for (i=0 ; i<pix ; i++)
{
pz[i] = izi;
pdest[i] = alphamap[(int)(pdest[i] + pcolor*256)];
}
}
}
// Manoel Kasimier - end
}
void D_DrawParticle_C (particle_t *pparticle) // Manoel Kasimier
{
vec3_t local, transformed;
float zi;
byte *pdest;
short *pz;
int i, izi, pix, count, u, v;
// byte *dottexture; // Manoel Kasimier
// transform point
VectorSubtract (pparticle->org, r_origin, local);
transformed[2] = DotProduct(local, r_ppn);
if (transformed[2] < PARTICLE_Z_CLIP)
return;
transformed[0] = DotProduct(local, r_pright);
transformed[1] = DotProduct(local, r_pup);
// 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);
izi = (int)(zi * 0x8000);
d_pix_shift = 8 - (int) ( ( (float) r_refdef.vrect.width) / ( (1.0f / 320.0f) * (float) vid.width));
pix = (double) ( (int) ( (float) izi * fovscale * r_part_scale.value * ( (float) vid.width / 50.0 )) >> d_pix_shift);
if (pix < d_pix_min)
pix = d_pix_min;
else if (pix > (d_pix_max))
pix = (int)(d_pix_max);
if ((v > (d_vrectbottom_particle - (pix << d_y_aspect_shift))) || // Manoel Kasimier - FOV-based scaling - fixed
(u > (d_vrectright_particle - pix)) || // Manoel Kasimier - FOV-based scaling - fixed
(v < d_vrecty) ||
(u < d_vrectx))
{
return;
}
pz = d_pzbuffer + (d_zwidth * v) + u;
pdest = d_viewbuffer + d_scantable[v] + u;
// Manoel Kasimier - begin
if (pix == 1)
{
if (pz[0] <= izi)
{
pz[0] = izi;
pdest[0] = pparticle->color;
}
}
else if (pix == 2)
{
if (pz[0] <= izi)
{
pz[0] = izi;
pdest[0] = pparticle->color;
pz[1] = izi;
pdest[1] = pparticle->color;
pz[d_zwidth] = izi;
pdest[screenwidth] = pparticle->color;
pz[d_zwidth+1] = izi;
pdest[screenwidth+1] = pparticle->color;
}
}
else
{
if (pz[pix/2] <= izi)
{
count = pix;
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
for (i=0 ; i<pix ; i++)
{
pz[i] = izi;
pdest[i] = pparticle->color;
}
}
}
// Manoel Kasimier - end
}