c737b31f1b
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@3117 fc73d0e0-1445-4013-8a0c-d673dee63da5
957 lines
17 KiB
C
957 lines
17 KiB
C
/*
|
|
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"
|
|
#include "r_local.h"
|
|
|
|
vec3_t r_pright, r_pup, r_ppn;
|
|
|
|
//Spike: Particles are depth sorted. So why depth write? They are the last to be drawn anyway.
|
|
#define PARTICLEFACTOR 0x8000 // Change DP_Partfac in ASM to match this
|
|
|
|
/*
|
|
==============
|
|
D_EndParticles
|
|
==============
|
|
*/
|
|
void D_EndParticles (void)
|
|
{
|
|
// not used by software driver
|
|
}
|
|
|
|
|
|
/*
|
|
==============
|
|
D_StartParticles
|
|
==============
|
|
*/
|
|
void D_StartParticles (void)
|
|
{
|
|
// not used by software driver
|
|
}
|
|
|
|
/*
|
|
==============
|
|
D_DrawParticle
|
|
==============
|
|
*/
|
|
#if !id386
|
|
|
|
void D_DrawParticle8S (vec3_t porg, float palpha, float pscale, unsigned int pcolour)
|
|
{
|
|
vec3_t local, transformed;
|
|
float zi;
|
|
qbyte *pdest;
|
|
short *pz;
|
|
int i, izi, pix, count, u, v;
|
|
|
|
// transform point
|
|
VectorSubtract (porg, 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 * PARTICLEFACTOR);
|
|
|
|
pix = izi >> d_pix_shift;
|
|
pix *= pscale;
|
|
|
|
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] = pcolour;
|
|
}
|
|
}
|
|
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] = pcolour;
|
|
}
|
|
|
|
if (pz[1] <= izi)
|
|
{
|
|
// pz[1] = izi;
|
|
pdest[1] = pcolour;
|
|
}
|
|
}
|
|
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] = pcolour;
|
|
}
|
|
|
|
if (pz[1] <= izi)
|
|
{
|
|
// pz[1] = izi;
|
|
pdest[1] = pcolour;
|
|
}
|
|
|
|
if (pz[2] <= izi)
|
|
{
|
|
// pz[2] = izi;
|
|
pdest[2] = pcolour;
|
|
}
|
|
}
|
|
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] = pcolour;
|
|
}
|
|
|
|
if (pz[1] <= izi)
|
|
{
|
|
// pz[1] = izi;
|
|
pdest[1] = pcolour;
|
|
}
|
|
|
|
if (pz[2] <= izi)
|
|
{
|
|
// pz[2] = izi;
|
|
pdest[2] = pcolour;
|
|
}
|
|
|
|
if (pz[3] <= izi)
|
|
{
|
|
// pz[3] = izi;
|
|
pdest[3] = pcolour;
|
|
}
|
|
}
|
|
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] = pcolour;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
#endif // !id386
|
|
|
|
void D_DrawParticle16S (vec3_t porg, float palpha, float pscale, unsigned int pcolour)
|
|
{
|
|
vec3_t local, transformed;
|
|
float zi;
|
|
unsigned short *pdest;
|
|
int a;
|
|
short *pz;
|
|
int i, izi, pix, count, u, v;
|
|
|
|
if (palpha <= 0.2)
|
|
return;
|
|
|
|
// transform point
|
|
VectorSubtract (porg, 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;
|
|
izi = (int)(zi * PARTICLEFACTOR);
|
|
|
|
pix = ((int)(izi*pscale));
|
|
|
|
if (pix < d_pix_min)
|
|
pix = d_pix_min;
|
|
else if (pix > d_pix_max)
|
|
pix = d_pix_max;
|
|
|
|
u -= pix/2;
|
|
v -= pix/2;
|
|
if (u < 0) u = 0;
|
|
if (v < 0) v = 0;
|
|
pdest = (unsigned short *)d_viewbuffer + ((d_scantable[v] + u));
|
|
|
|
a = 255*palpha;
|
|
|
|
switch (pix)
|
|
{
|
|
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] = d_8to16table[pcolour];
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
#pragma message("fixme: D_DrawParticle16T is not implemented")
|
|
#define D_DrawParticle16T D_DrawParticle16S
|
|
|
|
|
|
void D_DrawParticle32T (vec3_t porg, float palpha, float pscale, unsigned int pcolour)
|
|
{
|
|
vec3_t local, transformed;
|
|
float zi;
|
|
qbyte *pdest;
|
|
qbyte *pal;
|
|
int a;
|
|
short *pz;
|
|
int i, izi, pix, count, u, v;
|
|
|
|
if (palpha <= 0.0)
|
|
return;
|
|
|
|
// transform point
|
|
VectorSubtract (porg, 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;
|
|
izi = (int)(zi * PARTICLEFACTOR);
|
|
|
|
pix = ((int)(izi*pscale)) >> d_pix_shift;
|
|
|
|
if (pix < d_pix_min)
|
|
pix = d_pix_min;
|
|
else if (pix > d_pix_max)
|
|
pix = d_pix_max;
|
|
|
|
u -= pix/2;
|
|
v -= pix/2;
|
|
if (u < 0) u = 0;
|
|
if (v < 0) v = 0;
|
|
pdest = d_viewbuffer + ((d_scantable[v] + u)<<2);
|
|
pal = (qbyte *)&d_8to32table[pcolour];
|
|
|
|
a = 255*palpha;
|
|
|
|
switch (pix)
|
|
{
|
|
default:
|
|
count = pix << d_y_aspect_shift;
|
|
|
|
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth<<2)
|
|
{
|
|
for (i=0 ; i<pix ; i++)
|
|
{
|
|
if (pz[i] <= izi)
|
|
{
|
|
// pz[i] = izi;
|
|
pdest[(i<<2)+0] = (pdest[(i<<2)+0]*(255-a) + pal[0]*a) / 255;
|
|
pdest[(i<<2)+1] = (pdest[(i<<2)+1]*(255-a) + pal[1]*a) / 255;
|
|
pdest[(i<<2)+2] = (pdest[(i<<2)+2]*(255-a) + pal[2]*a) / 255;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
#define draw(x, y) x=Trans((qbyte)x,(qbyte)y)
|
|
#define addblend(x, y) x=AddBlend((qbyte)x,(qbyte)y)
|
|
void D_DrawParticleTrans (vec3_t porg, float palpha, float pscale, unsigned int pcolour, blendmode_t blendmode)
|
|
{
|
|
vec3_t local, transformed;
|
|
float zi;
|
|
qbyte *pdest;
|
|
short *pz;
|
|
int i, izi, pix, count, u, v;
|
|
|
|
if (r_pixbytes == 4)
|
|
{
|
|
D_DrawParticle32T(porg, palpha, pscale, pcolour);
|
|
return;
|
|
}
|
|
if (r_pixbytes == 2)
|
|
{
|
|
D_DrawParticle16T(porg, palpha, pscale, pcolour);
|
|
return;
|
|
}
|
|
|
|
if (palpha < TRANS_LOWER_CAP)
|
|
return;
|
|
|
|
if (palpha > TRANS_UPPER_CAP && blendmode == BM_BLEND)
|
|
{
|
|
D_DrawParticle8S(porg, palpha, pscale, pcolour);
|
|
return;
|
|
}
|
|
|
|
D_SetTransLevel(palpha, blendmode);
|
|
|
|
// transform point
|
|
VectorSubtract (porg, 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;
|
|
izi = (int)(zi * PARTICLEFACTOR);
|
|
|
|
pix = ((int)(izi*pscale)) >> d_pix_shift;
|
|
|
|
if (pix < d_pix_min)
|
|
pix = d_pix_min;
|
|
else if (pix > d_pix_max)
|
|
pix = d_pix_max;
|
|
|
|
u -= pix/2;
|
|
v -= pix/2;
|
|
if (u < 0) u = 0;
|
|
if (v < 0) v = 0;
|
|
pdest = d_viewbuffer + d_scantable[v] + u;
|
|
|
|
if (blendmode == BM_ADD) // additive drawing
|
|
{
|
|
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;
|
|
addblend(pdest[0], pcolour);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
count = 2 << d_y_aspect_shift;
|
|
|
|
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
|
|
{
|
|
if (pz[0] <= izi)
|
|
{
|
|
// pz[0] = izi;
|
|
addblend(pdest[0], pcolour);
|
|
}
|
|
|
|
if (pz[1] <= izi)
|
|
{
|
|
// pz[1] = izi;
|
|
addblend(pdest[1], pcolour);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 3:
|
|
count = 3 << d_y_aspect_shift;
|
|
|
|
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
|
|
{
|
|
if (pz[0] <= izi)
|
|
{
|
|
// pz[0] = izi;
|
|
addblend(pdest[0], pcolour);
|
|
}
|
|
|
|
if (pz[1] <= izi)
|
|
{
|
|
// pz[1] = izi;
|
|
addblend(pdest[1], pcolour);
|
|
}
|
|
|
|
if (pz[2] <= izi)
|
|
{
|
|
// pz[2] = izi;
|
|
addblend(pdest[2], pcolour);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
count = 4 << d_y_aspect_shift;
|
|
|
|
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
|
|
{
|
|
if (pz[0] <= izi)
|
|
{
|
|
// pz[0] = izi;
|
|
addblend(pdest[0], pcolour);
|
|
}
|
|
|
|
if (pz[1] <= izi)
|
|
{
|
|
// pz[1] = izi;
|
|
addblend(pdest[1], pcolour);
|
|
}
|
|
|
|
if (pz[2] <= izi)
|
|
{
|
|
// pz[2] = izi;
|
|
addblend(pdest[2], pcolour);
|
|
}
|
|
|
|
if (pz[3] <= izi)
|
|
{
|
|
// pz[3] = izi;
|
|
addblend(pdest[3], pcolour);
|
|
}
|
|
}
|
|
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;
|
|
addblend(pdest[i], pcolour);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
else // merge drawing
|
|
{
|
|
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;
|
|
draw(pdest[0], pcolour);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
count = 2 << d_y_aspect_shift;
|
|
|
|
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
|
|
{
|
|
if (pz[0] <= izi)
|
|
{
|
|
// pz[0] = izi;
|
|
draw(pdest[0], pcolour);
|
|
}
|
|
|
|
if (pz[1] <= izi)
|
|
{
|
|
// pz[1] = izi;
|
|
draw(pdest[1], pcolour);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 3:
|
|
count = 3 << d_y_aspect_shift;
|
|
|
|
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
|
|
{
|
|
if (pz[0] <= izi)
|
|
{
|
|
// pz[0] = izi;
|
|
draw(pdest[0], pcolour);
|
|
}
|
|
|
|
if (pz[1] <= izi)
|
|
{
|
|
// pz[1] = izi;
|
|
draw(pdest[1], pcolour);
|
|
}
|
|
|
|
if (pz[2] <= izi)
|
|
{
|
|
// pz[2] = izi;
|
|
draw(pdest[2], pcolour);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
count = 4 << d_y_aspect_shift;
|
|
|
|
for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
|
|
{
|
|
if (pz[0] <= izi)
|
|
{
|
|
// pz[0] = izi;
|
|
draw(pdest[0], pcolour);
|
|
}
|
|
|
|
if (pz[1] <= izi)
|
|
{
|
|
// pz[1] = izi;
|
|
draw(pdest[1], pcolour);
|
|
}
|
|
|
|
if (pz[2] <= izi)
|
|
{
|
|
// pz[2] = izi;
|
|
draw(pdest[2], pcolour);
|
|
}
|
|
|
|
if (pz[3] <= izi)
|
|
{
|
|
// pz[3] = izi;
|
|
draw(pdest[3], pcolour);
|
|
}
|
|
}
|
|
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;
|
|
draw(pdest[i], pcolour);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void D_2dPos(vec3_t pos, int *u, int *v, int *z)
|
|
{
|
|
float zi;
|
|
vec3_t local, transformed;
|
|
|
|
// transform point
|
|
VectorSubtract (pos, r_origin, local);
|
|
|
|
transformed[2] = DotProduct(local, r_ppn);
|
|
|
|
if (transformed[2] < PARTICLE_Z_CLIP) //near clip
|
|
{
|
|
*u = -1; //send it off the side intentionally.
|
|
return;
|
|
}
|
|
|
|
transformed[0] = DotProduct(local, r_pright);
|
|
transformed[1] = DotProduct(local, r_pup);
|
|
|
|
// project the point
|
|
zi = 1.0 / transformed[2];
|
|
*u = (int)(xcenter + zi * transformed[0] + 0.5);
|
|
*v = (int)(ycenter - zi * transformed[1] + 0.5);
|
|
|
|
*z = (int)(zi * 0x8000);
|
|
}
|
|
vec_t VI2Length(int x, int y)
|
|
{
|
|
float length;
|
|
length = (float)x*x + (float)y*y;
|
|
length = sqrt (length);
|
|
return length;
|
|
}
|
|
void D_DrawSpark32T (vec3_t src, vec3_t dest, float palpha, unsigned int pcolour) //draw a line in 3d space
|
|
{
|
|
/*
|
|
Finds 2d coords for the points, then draws a line between them with an appropriate alpha
|
|
*/
|
|
unsigned char *pdest;
|
|
unsigned char *pal;
|
|
short *pz;
|
|
int count, u1, v1, z1, a1, a, ia;
|
|
int u2, v2, z2;
|
|
|
|
int du, dv, dz, da;
|
|
|
|
if (palpha <= 0.0)
|
|
return;
|
|
|
|
D_2dPos(src, &u1, &v1, &z1);
|
|
D_2dPos(dest, &u2, &v2, &z2);
|
|
|
|
if ((v1 > d_vrectbottom_particle) ||
|
|
(u1 > d_vrectright_particle) ||
|
|
(v1 < d_vrecty) ||
|
|
(u1 < d_vrectx))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if ((v2 > d_vrectbottom_particle) ||
|
|
(u2 > d_vrectright_particle) ||
|
|
(v2 < d_vrecty) ||
|
|
(u2 < d_vrectx))
|
|
{
|
|
return;
|
|
}
|
|
pal = (qbyte *)(d_8to32table + pcolour);
|
|
a1 = 255 * palpha;
|
|
|
|
du = u2 - u1;
|
|
dv = v2 - v1;
|
|
dz = z2 - z1;
|
|
da = 0 - a1;
|
|
|
|
if (!du && !dv)
|
|
count = 1;
|
|
else
|
|
{
|
|
count = VI2Length(du, dv);
|
|
if (!count)
|
|
count = 1;
|
|
}
|
|
|
|
du *= 256*256;
|
|
dv *= 256*256;
|
|
dz *= 256*256;
|
|
da *= 256*256;
|
|
u1 = u1<<16;
|
|
v1 = v1<<16;
|
|
z1 = z1<<16;
|
|
a1 = a1<<16;
|
|
{
|
|
du /= count;
|
|
dv /= count;
|
|
dz /= count;
|
|
da /= count;
|
|
}
|
|
do
|
|
{
|
|
pz = d_pzbuffer + (d_zwidth * (v1>>16)) + (u1>>16);
|
|
|
|
if (*pz <= z1>>16)
|
|
{
|
|
// *pz = z1>>16;
|
|
|
|
a = a1>>16;
|
|
ia = 255-a;
|
|
pdest = (qbyte *)((unsigned int *)d_viewbuffer + ((d_scantable[v1>>16] + (u1>>16))));
|
|
pdest[0] = (pdest[0]*((ia)) + pal[0]*(a))/255;
|
|
pdest[1] = (pdest[1]*((ia)) + pal[1]*(a))/255;
|
|
pdest[2] = (pdest[2]*((ia)) + pal[2]*(a))/255;
|
|
}
|
|
|
|
u1 += du;
|
|
v1 += dv;
|
|
z1 += dz;
|
|
a1 += da;
|
|
} while (count--);
|
|
}
|
|
|
|
void D_DrawSpark16S (vec3_t src, vec3_t dest, float palpha, unsigned int pcolour) //draw a line in 3d space, 8bpp
|
|
{
|
|
unsigned short *pdest;
|
|
short *pz;
|
|
int count, u1, v1, z1;
|
|
int u2, v2, z2;
|
|
|
|
int du, dv, dz;
|
|
|
|
if (palpha <= 0.0)
|
|
return;
|
|
|
|
D_2dPos(src, &u1, &v1, &z1);
|
|
D_2dPos(dest, &u2, &v2, &z2);
|
|
|
|
if ((v1 > d_vrectbottom_particle) ||
|
|
(u1 > d_vrectright_particle) ||
|
|
(v1 < d_vrecty) ||
|
|
(u1 < d_vrectx))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if ((v2 > d_vrectbottom_particle) ||
|
|
(u2 > d_vrectright_particle) ||
|
|
(v2 < d_vrecty) ||
|
|
(u2 < d_vrectx))
|
|
{
|
|
return;
|
|
}
|
|
|
|
du = u2 - u1;
|
|
dv = v2 - v1;
|
|
dz = z2 - z1;
|
|
|
|
if (!du && !dv)
|
|
count = 1;
|
|
else
|
|
{
|
|
count = VI2Length(du, dv);
|
|
if (!count)
|
|
count = 1;
|
|
}
|
|
|
|
du *= 256*256;
|
|
dv *= 256*256;
|
|
dz *= 256*256;
|
|
u1 = u1<<16;
|
|
v1 = v1<<16;
|
|
z1 = z1<<16;
|
|
{
|
|
du /= count;
|
|
dv /= count;
|
|
dz /= count;
|
|
}
|
|
do
|
|
{
|
|
pz = d_pzbuffer + (d_zwidth * (v1>>16)) + (u1>>16);
|
|
|
|
if (*pz <= z1>>16)
|
|
{
|
|
// *pz = z1>>16;
|
|
|
|
pdest = (unsigned short*)d_viewbuffer + d_scantable[v1>>16] + (u1>>16);
|
|
*pdest = d_8to16table[pcolour];
|
|
}
|
|
|
|
u1 += du;
|
|
v1 += dv;
|
|
z1 += dz;
|
|
} while (count--);
|
|
}
|
|
#pragma message("fixme: D_DrawSpark16T is not implemented")
|
|
#define D_DrawSpark16T D_DrawSpark16S
|
|
|
|
void D_DrawSparkTrans (vec3_t src, vec3_t dest, float palpha, unsigned int pcolour, blendmode_t blendmode) //draw a line in 3d space, 8bpp
|
|
{
|
|
qbyte *pdest;
|
|
short *pz;
|
|
int count, u1, v1, z1;
|
|
int u2, v2, z2;
|
|
|
|
int du, dv, dz;
|
|
|
|
if (r_pixbytes == 4)
|
|
{
|
|
D_DrawSpark32T(src, dest, palpha, pcolour);
|
|
return;
|
|
}
|
|
if (r_pixbytes == 2)
|
|
{
|
|
D_DrawSpark16T(src, dest, palpha, pcolour);
|
|
return;
|
|
}
|
|
|
|
D_SetTransLevel(palpha, blendmode);
|
|
|
|
D_2dPos(src, &u1, &v1, &z1);
|
|
D_2dPos(dest, &u2, &v2, &z2);
|
|
|
|
if ((v1 > d_vrectbottom_particle) ||
|
|
(u1 > d_vrectright_particle) ||
|
|
(v1 < d_vrecty) ||
|
|
(u1 < d_vrectx))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if ((v2 > d_vrectbottom_particle) ||
|
|
(u2 > d_vrectright_particle) ||
|
|
(v2 < d_vrecty) ||
|
|
(u2 < d_vrectx))
|
|
{
|
|
return;
|
|
}
|
|
|
|
du = u2 - u1;
|
|
dv = v2 - v1;
|
|
dz = z2 - z1;
|
|
|
|
if (!du && !dv)
|
|
count = 1;
|
|
else
|
|
{
|
|
count = VI2Length(du, dv);
|
|
if (!count)
|
|
count = 1;
|
|
}
|
|
|
|
du *= 256*256;
|
|
dv *= 256*256;
|
|
dz *= 256*256;
|
|
u1 = u1<<16;
|
|
v1 = v1<<16;
|
|
z1 = z1<<16;
|
|
du /= count;
|
|
dv /= count;
|
|
dz /= count;
|
|
|
|
if (blendmode == BM_ADD) // additive
|
|
{
|
|
do
|
|
{
|
|
pz = d_pzbuffer + (d_zwidth * (v1>>16)) + (u1>>16);
|
|
|
|
if (*pz <= z1>>16)
|
|
{
|
|
// *pz = z1>>16;
|
|
pdest = d_viewbuffer + d_scantable[v1>>16] + (u1>>16);
|
|
addblend(*pdest, (qbyte)pcolour);
|
|
}
|
|
|
|
u1 += du;
|
|
v1 += dv;
|
|
z1 += dz;
|
|
} while (count--);
|
|
}
|
|
else // merge blend
|
|
{
|
|
do
|
|
{
|
|
pz = d_pzbuffer + (d_zwidth * (v1>>16)) + (u1>>16);
|
|
|
|
if (*pz <= z1>>16)
|
|
{
|
|
// *pz = z1>>16;
|
|
pdest = d_viewbuffer + d_scantable[v1>>16] + (u1>>16);
|
|
draw(*pdest, (qbyte)pcolour);
|
|
}
|
|
|
|
u1 += du;
|
|
v1 += dv;
|
|
z1 += dz;
|
|
} while (count--);
|
|
}
|
|
}
|