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14 * $Source: /cvs/cvsroot/d2x/3d/interp.c,v $
17 * $Date: 2001-10-19 08:06:20 $
19 * Polygon object interpreter
21 * $Log: not supported by cvs2svn $
22 * Revision 1.2 2001/01/31 15:17:48 bradleyb
23 * Makefile and conf.h fixes
25 * Revision 1.1.1.1 2001/01/19 03:29:58 bradleyb
28 * Revision 1.1.1.1 1999/06/14 21:57:47 donut
29 * Import of d1x 1.37 source.
31 * Revision 1.4 1995/10/10 22:20:09 allender
32 * new morphing code from Matt
34 * Revision 1.3 1995/08/31 15:40:24 allender
35 * swap color data correctly
37 * Revision 1.2 1995/05/11 13:06:38 allender
38 * fix int --> short problem
40 * Revision 1.1 1995/05/05 08:51:41 allender
43 * Revision 1.1 1995/04/17 06:44:33 matt
54 static char rcsid[] = "$Id: interp.c,v 1.3 2001-10-19 08:06:20 bradleyb Exp $";
66 #define OP_EOF 0 //eof
67 #define OP_DEFPOINTS 1 //defpoints
68 #define OP_FLATPOLY 2 //flat-shaded polygon
69 #define OP_TMAPPOLY 3 //texture-mapped polygon
70 #define OP_SORTNORM 4 //sort by normal
71 #define OP_RODBM 5 //rod bitmap
72 #define OP_SUBCALL 6 //call a subobject
73 #define OP_DEFP_START 7 //defpoints with start
74 #define OP_GLOW 8 //glow value for next poly
76 #define N_OPCODES (sizeof(opcode_table) / sizeof(*opcode_table))
78 #define MAX_POINTS_PER_POLY 25
80 short highest_texture_num;
81 int g3d_interp_outline;
83 g3s_point *Interp_point_list=NULL;
85 #define MAX_INTERP_COLORS 100
87 //this is a table of mappings from RGB15 to palette colors
88 struct {short pal_entry,rgb15;} interp_color_table[MAX_INTERP_COLORS];
90 int n_interp_colors=0;
92 //gives the interpreter an array of points to use
93 void g3_set_interp_points(g3s_point *pointlist)
95 Interp_point_list = pointlist;
98 #define w(p) (*((short *) (p)))
99 #define wp(p) ((short *) (p))
100 #define vp(p) ((vms_vector *) (p))
102 void rotate_point_list(g3s_point *dest,vms_vector *src,int n)
105 g3_rotate_point(dest++,src++);
108 vms_angvec zero_angles = {0,0,0};
110 g3s_point *point_list[MAX_POINTS_PER_POLY];
114 //calls the object interpreter to render an object. The object renderer
115 //is really a seperate pipeline. returns true if drew
116 bool g3_draw_polygon_model(void *model_ptr,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,fix model_light,fix *glow_values)
118 ubyte *p = model_ptr;
120 glow_num = -1; //glow off by default
122 while (w(p) != OP_EOF)
129 rotate_point_list(Interp_point_list,vp(p+4),n);
130 p += n*sizeof(struct vms_vector) + 4;
135 case OP_DEFP_START: {
139 rotate_point_list(&Interp_point_list[s],vp(p+8),n);
140 p += n*sizeof(struct vms_vector) + 8;
148 Assert( nv < MAX_POINTS_PER_POLY );
149 if (g3_check_normal_facing(vp(p+4),vp(p+16)) > 0) {
155 // DPH: Now we treat this color as 15bpp
156 // gr_setcolor(w(p+28));
158 //l = (32 * model_light) >> 16;
159 l = f2i(fixmul(i2f(32), model_light));
161 else if (l>32) l = 32;
162 cc = gr_find_closest_color_15bpp(w(p+28));
163 c = gr_fade_table[(l<<8)|cc];
167 point_list[i] = Interp_point_list + wp(p+30)[i];
169 g3_draw_poly(nv,point_list);
172 p += 30 + ((nv&~1)+1)*2;
181 Assert( nv < MAX_POINTS_PER_POLY );
182 if (g3_check_normal_facing(vp(p+4),vp(p+16)) > 0) {
186 //calculate light from surface normal
188 if (glow_num < 0) { //no glow
190 light = -vm_vec_dot(&View_matrix.fvec,vp(p+16));
191 light = f1_0/4 + (light*3)/4;
192 light = fixmul(light,model_light);
195 light = glow_values[glow_num];
199 //now poke light into l values
201 uvl_list = (g3s_uvl *) (p+30+((nv&~1)+1)*2);
204 uvl_list[i].l = light;
207 point_list[i] = Interp_point_list + wp(p+30)[i];
209 g3_draw_tmap(nv,point_list,uvl_list,model_bitmaps[w(p+28)]);
212 p += 30 + ((nv&~1)+1)*2 + nv*12;
219 if (g3_check_normal_facing(vp(p+16),vp(p+4)) > 0) { //facing
221 //draw back then front
223 g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
224 g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
227 else { //not facing. draw front then back
229 g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
230 g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
239 g3s_point rod_bot_p,rod_top_p;
241 g3_rotate_point(&rod_bot_p,vp(p+20));
242 g3_rotate_point(&rod_top_p,vp(p+4));
244 g3_draw_rod_tmap(model_bitmaps[w(p+2)],&rod_bot_p,w(p+16),&rod_top_p,w(p+32),f1_0);
254 a = &anim_angles[w(p+2)];
258 g3_start_instance_angles(vp(p+4),a);
260 g3_draw_polygon_model(p+w(p+16),model_bitmaps,anim_angles,model_light,glow_values);
283 extern int gr_find_closest_color_15bpp( int rgb );
289 //alternate interpreter for morphing object
290 bool g3_draw_morphing_model(void *model_ptr,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,fix model_light,vms_vector *new_points)
292 ubyte *p = model_ptr;
293 fix *glow_values = NULL;
295 glow_num = -1; //glow off by default
297 while (w(p) != OP_EOF)
304 rotate_point_list(Interp_point_list,new_points,n);
305 p += n*sizeof(struct vms_vector) + 4;
310 case OP_DEFP_START: {
314 rotate_point_list(&Interp_point_list[s],new_points,n);
315 p += n*sizeof(struct vms_vector) + 8;
324 gr_setcolor(w(p+28));
327 point_list[i] = Interp_point_list + wp(p+30)[i];
329 for (ntris=nv-2;ntris;ntris--) {
331 point_list[2] = Interp_point_list + wp(p+30)[i++];
333 g3_check_and_draw_poly(3,point_list,NULL,NULL);
335 point_list[1] = point_list[2];
339 p += 30 + ((nv&~1)+1)*2;
347 g3s_uvl morph_uvls[3];
351 //calculate light from surface normal
353 if (glow_num < 0) { //no glow
355 light = -vm_vec_dot(&View_matrix.fvec,vp(p+16));
356 light = f1_0/4 + (light*3)/4;
357 light = fixmul(light,model_light);
360 light = glow_values[glow_num];
364 //now poke light into l values
366 uvl_list = (g3s_uvl *) (p+30+((nv&~1)+1)*2);
369 morph_uvls[i].l = light;
372 point_list[i] = Interp_point_list + wp(p+30)[i];
374 morph_uvls[i].u = uvl_list[i].u;
375 morph_uvls[i].v = uvl_list[i].v;
378 for (ntris=nv-2;ntris;ntris--) {
380 point_list[2] = Interp_point_list + wp(p+30)[i];
381 morph_uvls[2].u = uvl_list[i].u;
382 morph_uvls[2].v = uvl_list[i].v;
385 g3_check_and_draw_tmap(3,point_list,uvl_list,model_bitmaps[w(p+28)],NULL,NULL);
387 point_list[1] = point_list[2];
388 morph_uvls[1].u = morph_uvls[2].u;
389 morph_uvls[1].v = morph_uvls[2].v;
393 p += 30 + ((nv&~1)+1)*2 + nv*12;
400 if (g3_check_normal_facing(vp(p+16),vp(p+4)) > 0) { //facing
402 //draw back then front
404 g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
405 g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
408 else { //not facing. draw front then back
410 g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
411 g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
420 g3s_point rod_bot_p,rod_top_p;
422 g3_rotate_point(&rod_bot_p,vp(p+20));
423 g3_rotate_point(&rod_top_p,vp(p+4));
425 g3_draw_rod_tmap(model_bitmaps[w(p+2)],&rod_bot_p,w(p+16),&rod_top_p,w(p+32),f1_0);
435 a = &anim_angles[w(p+2)];
439 g3_start_instance_angles(vp(p+4),a);
441 g3_draw_polygon_model(p+w(p+16),model_bitmaps,anim_angles,model_light,glow_values);
462 void init_model_sub(ubyte *p)
464 Assert(++nest_count < 1000);
466 while (w(p) != OP_EOF) {
472 p += n*sizeof(struct vms_vector) + 4;
476 case OP_DEFP_START: {
478 p += n*sizeof(struct vms_vector) + 8;
485 Assert(nv > 2); //must have 3 or more points
487 // *wp(p+28) = (short)gr_find_closest_color_15bpp(w(p+28));
489 p += 30 + ((nv&~1)+1)*2;
497 Assert(nv > 2); //must have 3 or more points
499 if (w(p+28) > highest_texture_num)
500 highest_texture_num = w(p+28);
502 p += 30 + ((nv&~1)+1)*2 + nv*12;
509 init_model_sub(p+w(p+28));
510 init_model_sub(p+w(p+30));
522 init_model_sub(p+w(p+16));
537 //init code for bitmap models
538 void g3_init_polygon_model(void *model_ptr)
544 highest_texture_num = -1;
546 init_model_sub((ubyte *) model_ptr);