2006-03-20 16:43:15 +00:00
|
|
|
/*
|
2014-06-12 08:41:03 +00:00
|
|
|
* This file is part of the DXX-Rebirth project <http://www.dxx-rebirth.com/>.
|
|
|
|
* It is copyright by its individual contributors, as recorded in the
|
|
|
|
* project's Git history. See COPYING.txt at the top level for license
|
|
|
|
* terms and a link to the Git history.
|
|
|
|
*/
|
2006-03-20 16:43:15 +00:00
|
|
|
/*
|
|
|
|
*
|
|
|
|
* Drawing routines
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
2012-07-07 18:35:06 +00:00
|
|
|
#include "dxxerror.h"
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
#include "3d.h"
|
|
|
|
#include "globvars.h"
|
|
|
|
#include "texmap.h"
|
|
|
|
#include "clipper.h"
|
|
|
|
|
2012-11-18 22:15:54 +00:00
|
|
|
tmap_drawer_type tmap_drawer_ptr = draw_tmap;
|
2014-09-02 22:13:15 +00:00
|
|
|
#ifndef OGL
|
2014-08-08 02:52:35 +00:00
|
|
|
static const flat_drawer_type flat_drawer_ptr = gr_upoly_tmap;
|
|
|
|
static const line_drawer_type line_drawer_ptr = gr_line;
|
2014-09-02 22:13:15 +00:00
|
|
|
#endif
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
//specifies 2d drawing routines to use instead of defaults. Passing
|
|
|
|
//NULL for either or both restores defaults
|
2014-08-08 02:52:35 +00:00
|
|
|
void g3_set_special_render(tmap_drawer_type tmap_drawer)
|
2006-03-20 16:43:15 +00:00
|
|
|
{
|
|
|
|
tmap_drawer_ptr = (tmap_drawer)?tmap_drawer:draw_tmap;
|
|
|
|
}
|
|
|
|
#ifndef OGL
|
|
|
|
//deal with a clipped line
|
2013-10-27 22:00:14 +00:00
|
|
|
static bool must_clip_line(g3s_point *p0,g3s_point *p1,ubyte codes_or)
|
2006-03-20 16:43:15 +00:00
|
|
|
{
|
|
|
|
bool ret;
|
|
|
|
|
|
|
|
if ((p0->p3_flags&PF_TEMP_POINT) || (p1->p3_flags&PF_TEMP_POINT))
|
|
|
|
|
|
|
|
ret = 0; //line has already been clipped, so give up
|
|
|
|
|
|
|
|
else {
|
|
|
|
|
2014-11-13 03:19:45 +00:00
|
|
|
clip_line(p0,p1,codes_or);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-11-13 03:19:52 +00:00
|
|
|
ret = g3_draw_line(*p0,*p1);
|
2006-03-20 16:43:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
//free temp points
|
|
|
|
|
|
|
|
if (p0->p3_flags & PF_TEMP_POINT)
|
|
|
|
free_temp_point(p0);
|
|
|
|
|
|
|
|
if (p1->p3_flags & PF_TEMP_POINT)
|
|
|
|
free_temp_point(p1);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
//draws a line. takes two points. returns true if drew
|
2014-11-15 03:10:04 +00:00
|
|
|
bool g3_draw_line(const g3s_point &p0,const g3s_point &p1)
|
2006-03-20 16:43:15 +00:00
|
|
|
{
|
|
|
|
ubyte codes_or;
|
|
|
|
|
2014-11-13 03:19:52 +00:00
|
|
|
if (p0.p3_codes & p1.p3_codes)
|
2006-03-20 16:43:15 +00:00
|
|
|
return 0;
|
|
|
|
|
2014-11-13 03:19:52 +00:00
|
|
|
codes_or = p0.p3_codes | p1.p3_codes;
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
if (codes_or & CC_BEHIND)
|
2014-11-13 03:19:52 +00:00
|
|
|
return must_clip_line(&p0,&p1,codes_or);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-11-13 03:19:52 +00:00
|
|
|
if (!(p0.p3_flags&PF_PROJECTED))
|
2014-11-13 03:21:33 +00:00
|
|
|
g3_project_point(p0);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-11-13 03:19:52 +00:00
|
|
|
if (p0.p3_flags&PF_OVERFLOW)
|
|
|
|
return must_clip_line(&p0,&p1,codes_or);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-11-13 03:19:52 +00:00
|
|
|
if (!(p1.p3_flags&PF_PROJECTED))
|
2014-11-13 03:21:33 +00:00
|
|
|
g3_project_point(p1);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-11-13 03:19:52 +00:00
|
|
|
if (p1.p3_flags&PF_OVERFLOW)
|
|
|
|
return must_clip_line(&p0,&p1,codes_or);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-11-13 03:19:52 +00:00
|
|
|
return (*line_drawer_ptr)(p0.p3_sx,p0.p3_sy,p1.p3_sx,p1.p3_sy);
|
2006-03-20 16:43:15 +00:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
//returns true if a plane is facing the viewer. takes the unrotated surface
|
|
|
|
//normal of the plane, and a point on it. The normal need not be normalized
|
2014-10-02 03:02:35 +00:00
|
|
|
bool g3_check_normal_facing(const vms_vector &v,const vms_vector &norm)
|
2006-03-20 16:43:15 +00:00
|
|
|
{
|
2014-10-29 03:24:31 +00:00
|
|
|
return (vm_vec_dot(vm_vec_sub(View_position,v),norm) > 0);
|
2006-03-20 16:43:15 +00:00
|
|
|
}
|
|
|
|
|
2014-08-27 03:16:51 +00:00
|
|
|
bool do_facing_check(g3s_point **vertlist)
|
2006-03-20 16:43:15 +00:00
|
|
|
{
|
2014-08-16 21:54:48 +00:00
|
|
|
//normal not specified, so must compute
|
2006-03-20 16:43:15 +00:00
|
|
|
//get three points (rotated) and compute normal
|
2014-11-02 03:44:27 +00:00
|
|
|
const auto tempv = vm_vec_perp(vertlist[0]->p3_vec,vertlist[1]->p3_vec,vertlist[2]->p3_vec);
|
2014-09-28 21:11:48 +00:00
|
|
|
return (vm_vec_dot(tempv,vertlist[1]->p3_vec) < 0);
|
2006-03-20 16:43:15 +00:00
|
|
|
}
|
|
|
|
|
2012-06-30 19:14:06 +00:00
|
|
|
#ifndef OGL
|
2006-03-20 16:43:15 +00:00
|
|
|
//deal with face that must be clipped
|
2012-06-30 19:14:06 +00:00
|
|
|
static bool must_clip_flat_face(int nv,g3s_codes cc)
|
2006-03-20 16:43:15 +00:00
|
|
|
{
|
|
|
|
bool ret=0;
|
|
|
|
g3s_point **bufptr;
|
|
|
|
|
2014-11-13 04:07:06 +00:00
|
|
|
g3s_point *Vbuf0[MAX_POINTS_IN_POLY];
|
|
|
|
g3s_point *Vbuf1[MAX_POINTS_IN_POLY];
|
2006-03-20 16:43:15 +00:00
|
|
|
bufptr = clip_polygon(Vbuf0,Vbuf1,&nv,&cc);
|
|
|
|
|
2012-11-02 17:09:03 +00:00
|
|
|
if (nv>0 && !(cc.uor&CC_BEHIND) && !cc.uand) {
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-09-26 02:42:14 +00:00
|
|
|
for (int i=0;i<nv;i++) {
|
2006-03-20 16:43:15 +00:00
|
|
|
g3s_point *p = bufptr[i];
|
|
|
|
|
|
|
|
if (!(p->p3_flags&PF_PROJECTED))
|
2014-11-13 03:21:33 +00:00
|
|
|
g3_project_point(*p);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
if (p->p3_flags&PF_OVERFLOW) {
|
|
|
|
ret = 1;
|
|
|
|
goto free_points;
|
|
|
|
}
|
|
|
|
|
|
|
|
Vertex_list[i*2] = p->p3_sx;
|
|
|
|
Vertex_list[i*2+1] = p->p3_sy;
|
|
|
|
}
|
|
|
|
|
|
|
|
(*flat_drawer_ptr)(nv,(int *)Vertex_list);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
ret=1;
|
|
|
|
|
|
|
|
//free temp points
|
|
|
|
free_points:
|
|
|
|
;
|
|
|
|
|
2014-09-26 02:42:14 +00:00
|
|
|
for (int i=0;i<nv;i++)
|
2006-03-20 16:43:15 +00:00
|
|
|
if (Vbuf1[i]->p3_flags & PF_TEMP_POINT)
|
|
|
|
free_temp_point(Vbuf1[i]);
|
|
|
|
|
|
|
|
// Assert(free_point_num==0);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
//draw a flat-shaded face.
|
|
|
|
//returns 1 if off screen, 0 if drew
|
|
|
|
bool g3_draw_poly(int nv,g3s_point **pointlist)
|
|
|
|
{
|
|
|
|
g3s_point **bufptr;
|
|
|
|
g3s_codes cc;
|
|
|
|
|
2014-11-13 04:07:06 +00:00
|
|
|
g3s_point *Vbuf0[MAX_POINTS_IN_POLY];
|
2006-03-20 16:43:15 +00:00
|
|
|
bufptr = Vbuf0;
|
|
|
|
|
2014-09-26 02:42:14 +00:00
|
|
|
for (int i=0;i<nv;i++) {
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
bufptr[i] = pointlist[i];
|
|
|
|
|
2012-11-02 17:09:03 +00:00
|
|
|
cc.uand &= bufptr[i]->p3_codes;
|
|
|
|
cc.uor |= bufptr[i]->p3_codes;
|
2006-03-20 16:43:15 +00:00
|
|
|
}
|
|
|
|
|
2012-11-02 17:09:03 +00:00
|
|
|
if (cc.uand)
|
2006-03-20 16:43:15 +00:00
|
|
|
return 1; //all points off screen
|
|
|
|
|
2012-11-02 17:09:03 +00:00
|
|
|
if (cc.uor)
|
2006-03-20 16:43:15 +00:00
|
|
|
return must_clip_flat_face(nv,cc);
|
|
|
|
|
|
|
|
//now make list of 2d coords (& check for overflow)
|
|
|
|
|
2014-09-26 02:42:14 +00:00
|
|
|
for (int i=0;i<nv;i++) {
|
2006-03-20 16:43:15 +00:00
|
|
|
g3s_point *p = bufptr[i];
|
|
|
|
|
|
|
|
if (!(p->p3_flags&PF_PROJECTED))
|
2014-11-13 03:21:33 +00:00
|
|
|
g3_project_point(*p);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
if (p->p3_flags&PF_OVERFLOW)
|
|
|
|
return must_clip_flat_face(nv,cc);
|
|
|
|
|
|
|
|
Vertex_list[i*2] = p->p3_sx;
|
|
|
|
Vertex_list[i*2+1] = p->p3_sy;
|
|
|
|
}
|
|
|
|
|
|
|
|
(*flat_drawer_ptr)(nv,(int *)Vertex_list);
|
|
|
|
|
|
|
|
return 0; //say it drew
|
|
|
|
}
|
|
|
|
|
2014-08-16 17:35:44 +00:00
|
|
|
static void must_clip_tmap_face(int nv,g3s_codes cc,grs_bitmap *bm);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
//draw a texture-mapped face.
|
|
|
|
//returns 1 if off screen, 0 if drew
|
2014-11-13 03:44:04 +00:00
|
|
|
void _g3_draw_tmap(unsigned nv,g3s_point **pointlist,const g3s_uvl *uvl_list,const g3s_lrgb *light_rgb,grs_bitmap &bm)
|
2006-03-20 16:43:15 +00:00
|
|
|
{
|
|
|
|
g3s_point **bufptr;
|
|
|
|
g3s_codes cc;
|
|
|
|
|
2014-11-13 04:07:06 +00:00
|
|
|
g3s_point *Vbuf0[MAX_POINTS_IN_POLY];
|
2006-03-20 16:43:15 +00:00
|
|
|
bufptr = Vbuf0;
|
|
|
|
|
2014-09-26 02:42:14 +00:00
|
|
|
for (int i=0;i<nv;i++) {
|
2006-03-20 16:43:15 +00:00
|
|
|
g3s_point *p;
|
|
|
|
|
|
|
|
p = bufptr[i] = pointlist[i];
|
|
|
|
|
2012-11-02 17:09:03 +00:00
|
|
|
cc.uand &= p->p3_codes;
|
|
|
|
cc.uor |= p->p3_codes;
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
p->p3_u = uvl_list[i].u;
|
|
|
|
p->p3_v = uvl_list[i].v;
|
2011-04-07 20:32:47 +00:00
|
|
|
p->p3_l = (light_rgb[i].r+light_rgb[i].g+light_rgb[i].b)/3;
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
p->p3_flags |= PF_UVS + PF_LS;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2012-11-02 17:09:03 +00:00
|
|
|
if (cc.uand)
|
2014-08-16 17:35:44 +00:00
|
|
|
return; //all points off screen
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2012-11-02 17:09:03 +00:00
|
|
|
if (cc.uor)
|
2014-08-16 17:35:44 +00:00
|
|
|
{
|
2014-11-13 03:44:04 +00:00
|
|
|
must_clip_tmap_face(nv,cc,&bm);
|
2014-08-16 17:35:44 +00:00
|
|
|
return;
|
|
|
|
}
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
//now make list of 2d coords (& check for overflow)
|
|
|
|
|
2014-09-26 02:42:14 +00:00
|
|
|
for (int i=0;i<nv;i++) {
|
2006-03-20 16:43:15 +00:00
|
|
|
g3s_point *p = bufptr[i];
|
|
|
|
|
|
|
|
if (!(p->p3_flags&PF_PROJECTED))
|
2014-11-13 03:21:33 +00:00
|
|
|
g3_project_point(*p);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
if (p->p3_flags&PF_OVERFLOW) {
|
|
|
|
Int3(); //should not overflow after clip
|
2014-08-16 17:35:44 +00:00
|
|
|
return;
|
2006-03-20 16:43:15 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-11-13 03:44:04 +00:00
|
|
|
(*tmap_drawer_ptr)(&bm,nv,bufptr);
|
2006-03-20 16:43:15 +00:00
|
|
|
}
|
|
|
|
|
2014-08-16 17:35:44 +00:00
|
|
|
static void must_clip_tmap_face(int nv,g3s_codes cc,grs_bitmap *bm)
|
2006-03-20 16:43:15 +00:00
|
|
|
{
|
|
|
|
g3s_point **bufptr;
|
2014-11-13 04:07:06 +00:00
|
|
|
g3s_point *Vbuf0[MAX_POINTS_IN_POLY];
|
|
|
|
g3s_point *Vbuf1[MAX_POINTS_IN_POLY];
|
2006-03-20 16:43:15 +00:00
|
|
|
bufptr = clip_polygon(Vbuf0,Vbuf1,&nv,&cc);
|
|
|
|
|
2012-11-02 17:09:03 +00:00
|
|
|
if (nv && !(cc.uor&CC_BEHIND) && !cc.uand) {
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-09-26 02:42:14 +00:00
|
|
|
for (int i=0;i<nv;i++) {
|
2006-03-20 16:43:15 +00:00
|
|
|
g3s_point *p = bufptr[i];
|
|
|
|
|
|
|
|
if (!(p->p3_flags&PF_PROJECTED))
|
2014-11-13 03:21:33 +00:00
|
|
|
g3_project_point(*p);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
|
|
|
if (p->p3_flags&PF_OVERFLOW) {
|
|
|
|
Int3(); //should not overflow after clip
|
|
|
|
goto free_points;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
(*tmap_drawer_ptr)(bm,nv,bufptr);
|
|
|
|
}
|
|
|
|
|
|
|
|
free_points:
|
|
|
|
;
|
|
|
|
|
2014-09-26 02:42:14 +00:00
|
|
|
for (int i=0;i<nv;i++)
|
2006-03-20 16:43:15 +00:00
|
|
|
if (bufptr[i]->p3_flags & PF_TEMP_POINT)
|
|
|
|
free_temp_point(bufptr[i]);
|
|
|
|
|
|
|
|
// Assert(free_point_num==0);
|
|
|
|
}
|
|
|
|
|
|
|
|
//draw a sortof sphere - i.e., the 2d radius is proportional to the 3d
|
|
|
|
//radius, but not to the distance from the eye
|
2014-11-13 03:22:49 +00:00
|
|
|
int g3_draw_sphere(g3s_point &pnt,fix rad)
|
2006-03-20 16:43:15 +00:00
|
|
|
{
|
2014-11-13 03:22:49 +00:00
|
|
|
if (! (pnt.p3_codes & CC_BEHIND)) {
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-11-13 03:22:49 +00:00
|
|
|
if (! (pnt.p3_flags & PF_PROJECTED))
|
|
|
|
g3_project_point(pnt);
|
2006-03-20 16:43:15 +00:00
|
|
|
|
2014-11-13 03:22:49 +00:00
|
|
|
if (! (pnt.p3_codes & PF_OVERFLOW)) {
|
2006-03-20 16:43:15 +00:00
|
|
|
fix r2,t;
|
|
|
|
|
|
|
|
r2 = fixmul(rad,Matrix_scale.x);
|
|
|
|
#ifndef __powerc
|
2014-11-13 03:22:49 +00:00
|
|
|
if (checkmuldiv(&t,r2,Canv_w2,pnt.p3_z))
|
|
|
|
return gr_disk(pnt.p3_sx,pnt.p3_sy,t);
|
2006-03-20 16:43:15 +00:00
|
|
|
#else
|
2014-11-13 03:22:49 +00:00
|
|
|
if (pnt.p3_z == 0)
|
2006-03-20 16:43:15 +00:00
|
|
|
return 0;
|
2014-11-13 03:22:49 +00:00
|
|
|
return gr_disk(pnt.p3_sx, pnt.p3_sy, fl2f(((f2fl(r2) * fCanv_w2) / f2fl(pnt.p3_z))));
|
2006-03-20 16:43:15 +00:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|