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11 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERV
14 * $Source: /cvs/cvsroot/d2x/3d/interp.c,v $
15 * $Revision: 1.1.1.1 $
17 * $Date: 2001-01-19 03:29:58 $
19 * Polygon object interpreter
21 * $Log: not supported by cvs2svn $
22 * Revision 1.1.1.1 1999/06/14 21:57:47 donut
23 * Import of d1x 1.37 source.
25 * Revision 1.4 1995/10/10 22:20:09 allender
26 * new morphing code from Matt
28 * Revision 1.3 1995/08/31 15:40:24 allender
29 * swap color data correctly
31 * Revision 1.2 1995/05/11 13:06:38 allender
32 * fix int --> short problem
34 * Revision 1.1 1995/05/05 08:51:41 allender
37 * Revision 1.1 1995/04/17 06:44:33 matt
44 static char rcsid[] = "$Id: interp.c,v 1.1.1.1 2001-01-19 03:29:58 bradleyb Exp $";
57 #define OP_EOF 0 //eof
58 #define OP_DEFPOINTS 1 //defpoints
59 #define OP_FLATPOLY 2 //flat-shaded polygon
60 #define OP_TMAPPOLY 3 //texture-mapped polygon
61 #define OP_SORTNORM 4 //sort by normal
62 #define OP_RODBM 5 //rod bitmap
63 #define OP_SUBCALL 6 //call a subobject
64 #define OP_DEFP_START 7 //defpoints with start
65 #define OP_GLOW 8 //glow value for next poly
67 #define N_OPCODES (sizeof(opcode_table) / sizeof(*opcode_table))
69 #define MAX_POINTS_PER_POLY 25
71 short highest_texture_num;
72 int g3d_interp_outline;
74 g3s_point *Interp_point_list=NULL;
76 #define MAX_INTERP_COLORS 100
78 //this is a table of mappings from RGB15 to palette colors
79 struct {short pal_entry,rgb15;} interp_color_table[MAX_INTERP_COLORS];
81 int n_interp_colors=0;
83 //gives the interpreter an array of points to use
84 void g3_set_interp_points(g3s_point *pointlist)
86 Interp_point_list = pointlist;
89 #define w(p) (*((short *) (p)))
90 #define wp(p) ((short *) (p))
91 #define vp(p) ((vms_vector *) (p))
93 void rotate_point_list(g3s_point *dest,vms_vector *src,int n)
96 g3_rotate_point(dest++,src++);
99 vms_angvec zero_angles = {0,0,0};
101 g3s_point *point_list[MAX_POINTS_PER_POLY];
105 //calls the object interpreter to render an object. The object renderer
106 //is really a seperate pipeline. returns true if drew
107 bool g3_draw_polygon_model(void *model_ptr,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,fix model_light,fix *glow_values)
109 ubyte *p = model_ptr;
111 glow_num = -1; //glow off by default
113 while (w(p) != OP_EOF)
120 rotate_point_list(Interp_point_list,vp(p+4),n);
121 p += n*sizeof(struct vms_vector) + 4;
126 case OP_DEFP_START: {
130 rotate_point_list(&Interp_point_list[s],vp(p+8),n);
131 p += n*sizeof(struct vms_vector) + 8;
139 Assert( nv < MAX_POINTS_PER_POLY );
140 if (g3_check_normal_facing(vp(p+4),vp(p+16)) > 0) {
146 // DPH: Now we treat this color as 15bpp
147 // gr_setcolor(w(p+28));
149 //l = (32 * model_light) >> 16;
150 l = f2i(fixmul(i2f(32), model_light));
152 else if (l>32) l = 32;
153 cc = gr_find_closest_color_15bpp(w(p+28));
154 c = gr_fade_table[(l<<8)|cc];
158 point_list[i] = Interp_point_list + wp(p+30)[i];
160 g3_draw_poly(nv,point_list);
163 p += 30 + ((nv&~1)+1)*2;
172 Assert( nv < MAX_POINTS_PER_POLY );
173 if (g3_check_normal_facing(vp(p+4),vp(p+16)) > 0) {
177 //calculate light from surface normal
179 if (glow_num < 0) { //no glow
181 light = -vm_vec_dot(&View_matrix.fvec,vp(p+16));
182 light = f1_0/4 + (light*3)/4;
183 light = fixmul(light,model_light);
186 light = glow_values[glow_num];
190 //now poke light into l values
192 uvl_list = (g3s_uvl *) (p+30+((nv&~1)+1)*2);
195 uvl_list[i].l = light;
198 point_list[i] = Interp_point_list + wp(p+30)[i];
200 g3_draw_tmap(nv,point_list,uvl_list,model_bitmaps[w(p+28)]);
203 p += 30 + ((nv&~1)+1)*2 + nv*12;
210 if (g3_check_normal_facing(vp(p+16),vp(p+4)) > 0) { //facing
212 //draw back then front
214 g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
215 g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
218 else { //not facing. draw front then back
220 g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
221 g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
230 g3s_point rod_bot_p,rod_top_p;
232 g3_rotate_point(&rod_bot_p,vp(p+20));
233 g3_rotate_point(&rod_top_p,vp(p+4));
235 g3_draw_rod_tmap(model_bitmaps[w(p+2)],&rod_bot_p,w(p+16),&rod_top_p,w(p+32),f1_0);
245 a = &anim_angles[w(p+2)];
249 g3_start_instance_angles(vp(p+4),a);
251 g3_draw_polygon_model(p+w(p+16),model_bitmaps,anim_angles,model_light,glow_values);
274 extern int gr_find_closest_color_15bpp( int rgb );
280 //alternate interpreter for morphing object
281 bool g3_draw_morphing_model(void *model_ptr,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,fix model_light,vms_vector *new_points)
283 ubyte *p = model_ptr;
284 fix *glow_values = NULL;
286 glow_num = -1; //glow off by default
288 while (w(p) != OP_EOF)
295 rotate_point_list(Interp_point_list,new_points,n);
296 p += n*sizeof(struct vms_vector) + 4;
301 case OP_DEFP_START: {
305 rotate_point_list(&Interp_point_list[s],new_points,n);
306 p += n*sizeof(struct vms_vector) + 8;
315 gr_setcolor(w(p+28));
318 point_list[i] = Interp_point_list + wp(p+30)[i];
320 for (ntris=nv-2;ntris;ntris--) {
322 point_list[2] = Interp_point_list + wp(p+30)[i++];
324 g3_check_and_draw_poly(3,point_list,NULL,NULL);
326 point_list[1] = point_list[2];
330 p += 30 + ((nv&~1)+1)*2;
338 g3s_uvl morph_uvls[3];
342 //calculate light from surface normal
344 if (glow_num < 0) { //no glow
346 light = -vm_vec_dot(&View_matrix.fvec,vp(p+16));
347 light = f1_0/4 + (light*3)/4;
348 light = fixmul(light,model_light);
351 light = glow_values[glow_num];
355 //now poke light into l values
357 uvl_list = (g3s_uvl *) (p+30+((nv&~1)+1)*2);
360 morph_uvls[i].l = light;
363 point_list[i] = Interp_point_list + wp(p+30)[i];
365 morph_uvls[i].u = uvl_list[i].u;
366 morph_uvls[i].v = uvl_list[i].v;
369 for (ntris=nv-2;ntris;ntris--) {
371 point_list[2] = Interp_point_list + wp(p+30)[i];
372 morph_uvls[2].u = uvl_list[i].u;
373 morph_uvls[2].v = uvl_list[i].v;
376 g3_check_and_draw_tmap(3,point_list,uvl_list,model_bitmaps[w(p+28)],NULL,NULL);
378 point_list[1] = point_list[2];
379 morph_uvls[1].u = morph_uvls[2].u;
380 morph_uvls[1].v = morph_uvls[2].v;
384 p += 30 + ((nv&~1)+1)*2 + nv*12;
391 if (g3_check_normal_facing(vp(p+16),vp(p+4)) > 0) { //facing
393 //draw back then front
395 g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
396 g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
399 else { //not facing. draw front then back
401 g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
402 g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
411 g3s_point rod_bot_p,rod_top_p;
413 g3_rotate_point(&rod_bot_p,vp(p+20));
414 g3_rotate_point(&rod_top_p,vp(p+4));
416 g3_draw_rod_tmap(model_bitmaps[w(p+2)],&rod_bot_p,w(p+16),&rod_top_p,w(p+32),f1_0);
426 a = &anim_angles[w(p+2)];
430 g3_start_instance_angles(vp(p+4),a);
432 g3_draw_polygon_model(p+w(p+16),model_bitmaps,anim_angles,model_light,glow_values);
453 void init_model_sub(ubyte *p)
455 Assert(++nest_count < 1000);
457 while (w(p) != OP_EOF) {
463 p += n*sizeof(struct vms_vector) + 4;
467 case OP_DEFP_START: {
469 p += n*sizeof(struct vms_vector) + 8;
476 Assert(nv > 2); //must have 3 or more points
478 // *wp(p+28) = (short)gr_find_closest_color_15bpp(w(p+28));
480 p += 30 + ((nv&~1)+1)*2;
488 Assert(nv > 2); //must have 3 or more points
490 if (w(p+28) > highest_texture_num)
491 highest_texture_num = w(p+28);
493 p += 30 + ((nv&~1)+1)*2 + nv*12;
500 init_model_sub(p+w(p+28));
501 init_model_sub(p+w(p+30));
513 init_model_sub(p+w(p+16));
526 //init code for bitmap models
527 void g3_init_polygon_model(void *model_ptr)
533 highest_texture_num = -1;
535 init_model_sub((ubyte *) model_ptr);