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8 FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
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11 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
14 * $Source: /cvs/cvsroot/d2x/3d/interp.c,v $
17 * $Date: 2001-01-31 15:17:48 $
19 * Polygon object interpreter
21 * $Log: not supported by cvs2svn $
22 * Revision 1.1.1.1 2001/01/19 03:29:58 bradleyb
25 * Revision 1.1.1.1 1999/06/14 21:57:47 donut
26 * Import of d1x 1.37 source.
28 * Revision 1.4 1995/10/10 22:20:09 allender
29 * new morphing code from Matt
31 * Revision 1.3 1995/08/31 15:40:24 allender
32 * swap color data correctly
34 * Revision 1.2 1995/05/11 13:06:38 allender
35 * fix int --> short problem
37 * Revision 1.1 1995/05/05 08:51:41 allender
40 * Revision 1.1 1995/04/17 06:44:33 matt
51 static char rcsid[] = "$Id: interp.c,v 1.2 2001-01-31 15:17:48 bradleyb Exp $";
63 #define OP_EOF 0 //eof
64 #define OP_DEFPOINTS 1 //defpoints
65 #define OP_FLATPOLY 2 //flat-shaded polygon
66 #define OP_TMAPPOLY 3 //texture-mapped polygon
67 #define OP_SORTNORM 4 //sort by normal
68 #define OP_RODBM 5 //rod bitmap
69 #define OP_SUBCALL 6 //call a subobject
70 #define OP_DEFP_START 7 //defpoints with start
71 #define OP_GLOW 8 //glow value for next poly
73 #define N_OPCODES (sizeof(opcode_table) / sizeof(*opcode_table))
75 #define MAX_POINTS_PER_POLY 25
77 short highest_texture_num;
78 int g3d_interp_outline;
80 g3s_point *Interp_point_list=NULL;
82 #define MAX_INTERP_COLORS 100
84 //this is a table of mappings from RGB15 to palette colors
85 struct {short pal_entry,rgb15;} interp_color_table[MAX_INTERP_COLORS];
87 int n_interp_colors=0;
89 //gives the interpreter an array of points to use
90 void g3_set_interp_points(g3s_point *pointlist)
92 Interp_point_list = pointlist;
95 #define w(p) (*((short *) (p)))
96 #define wp(p) ((short *) (p))
97 #define vp(p) ((vms_vector *) (p))
99 void rotate_point_list(g3s_point *dest,vms_vector *src,int n)
102 g3_rotate_point(dest++,src++);
105 vms_angvec zero_angles = {0,0,0};
107 g3s_point *point_list[MAX_POINTS_PER_POLY];
111 //calls the object interpreter to render an object. The object renderer
112 //is really a seperate pipeline. returns true if drew
113 bool g3_draw_polygon_model(void *model_ptr,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,fix model_light,fix *glow_values)
115 ubyte *p = model_ptr;
117 glow_num = -1; //glow off by default
119 while (w(p) != OP_EOF)
126 rotate_point_list(Interp_point_list,vp(p+4),n);
127 p += n*sizeof(struct vms_vector) + 4;
132 case OP_DEFP_START: {
136 rotate_point_list(&Interp_point_list[s],vp(p+8),n);
137 p += n*sizeof(struct vms_vector) + 8;
145 Assert( nv < MAX_POINTS_PER_POLY );
146 if (g3_check_normal_facing(vp(p+4),vp(p+16)) > 0) {
152 // DPH: Now we treat this color as 15bpp
153 // gr_setcolor(w(p+28));
155 //l = (32 * model_light) >> 16;
156 l = f2i(fixmul(i2f(32), model_light));
158 else if (l>32) l = 32;
159 cc = gr_find_closest_color_15bpp(w(p+28));
160 c = gr_fade_table[(l<<8)|cc];
164 point_list[i] = Interp_point_list + wp(p+30)[i];
166 g3_draw_poly(nv,point_list);
169 p += 30 + ((nv&~1)+1)*2;
178 Assert( nv < MAX_POINTS_PER_POLY );
179 if (g3_check_normal_facing(vp(p+4),vp(p+16)) > 0) {
183 //calculate light from surface normal
185 if (glow_num < 0) { //no glow
187 light = -vm_vec_dot(&View_matrix.fvec,vp(p+16));
188 light = f1_0/4 + (light*3)/4;
189 light = fixmul(light,model_light);
192 light = glow_values[glow_num];
196 //now poke light into l values
198 uvl_list = (g3s_uvl *) (p+30+((nv&~1)+1)*2);
201 uvl_list[i].l = light;
204 point_list[i] = Interp_point_list + wp(p+30)[i];
206 g3_draw_tmap(nv,point_list,uvl_list,model_bitmaps[w(p+28)]);
209 p += 30 + ((nv&~1)+1)*2 + nv*12;
216 if (g3_check_normal_facing(vp(p+16),vp(p+4)) > 0) { //facing
218 //draw back then front
220 g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
221 g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
224 else { //not facing. draw front then back
226 g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
227 g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
236 g3s_point rod_bot_p,rod_top_p;
238 g3_rotate_point(&rod_bot_p,vp(p+20));
239 g3_rotate_point(&rod_top_p,vp(p+4));
241 g3_draw_rod_tmap(model_bitmaps[w(p+2)],&rod_bot_p,w(p+16),&rod_top_p,w(p+32),f1_0);
251 a = &anim_angles[w(p+2)];
255 g3_start_instance_angles(vp(p+4),a);
257 g3_draw_polygon_model(p+w(p+16),model_bitmaps,anim_angles,model_light,glow_values);
280 extern int gr_find_closest_color_15bpp( int rgb );
286 //alternate interpreter for morphing object
287 bool g3_draw_morphing_model(void *model_ptr,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,fix model_light,vms_vector *new_points)
289 ubyte *p = model_ptr;
290 fix *glow_values = NULL;
292 glow_num = -1; //glow off by default
294 while (w(p) != OP_EOF)
301 rotate_point_list(Interp_point_list,new_points,n);
302 p += n*sizeof(struct vms_vector) + 4;
307 case OP_DEFP_START: {
311 rotate_point_list(&Interp_point_list[s],new_points,n);
312 p += n*sizeof(struct vms_vector) + 8;
321 gr_setcolor(w(p+28));
324 point_list[i] = Interp_point_list + wp(p+30)[i];
326 for (ntris=nv-2;ntris;ntris--) {
328 point_list[2] = Interp_point_list + wp(p+30)[i++];
330 g3_check_and_draw_poly(3,point_list,NULL,NULL);
332 point_list[1] = point_list[2];
336 p += 30 + ((nv&~1)+1)*2;
344 g3s_uvl morph_uvls[3];
348 //calculate light from surface normal
350 if (glow_num < 0) { //no glow
352 light = -vm_vec_dot(&View_matrix.fvec,vp(p+16));
353 light = f1_0/4 + (light*3)/4;
354 light = fixmul(light,model_light);
357 light = glow_values[glow_num];
361 //now poke light into l values
363 uvl_list = (g3s_uvl *) (p+30+((nv&~1)+1)*2);
366 morph_uvls[i].l = light;
369 point_list[i] = Interp_point_list + wp(p+30)[i];
371 morph_uvls[i].u = uvl_list[i].u;
372 morph_uvls[i].v = uvl_list[i].v;
375 for (ntris=nv-2;ntris;ntris--) {
377 point_list[2] = Interp_point_list + wp(p+30)[i];
378 morph_uvls[2].u = uvl_list[i].u;
379 morph_uvls[2].v = uvl_list[i].v;
382 g3_check_and_draw_tmap(3,point_list,uvl_list,model_bitmaps[w(p+28)],NULL,NULL);
384 point_list[1] = point_list[2];
385 morph_uvls[1].u = morph_uvls[2].u;
386 morph_uvls[1].v = morph_uvls[2].v;
390 p += 30 + ((nv&~1)+1)*2 + nv*12;
397 if (g3_check_normal_facing(vp(p+16),vp(p+4)) > 0) { //facing
399 //draw back then front
401 g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
402 g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
405 else { //not facing. draw front then back
407 g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
408 g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
417 g3s_point rod_bot_p,rod_top_p;
419 g3_rotate_point(&rod_bot_p,vp(p+20));
420 g3_rotate_point(&rod_top_p,vp(p+4));
422 g3_draw_rod_tmap(model_bitmaps[w(p+2)],&rod_bot_p,w(p+16),&rod_top_p,w(p+32),f1_0);
432 a = &anim_angles[w(p+2)];
436 g3_start_instance_angles(vp(p+4),a);
438 g3_draw_polygon_model(p+w(p+16),model_bitmaps,anim_angles,model_light,glow_values);
459 void init_model_sub(ubyte *p)
461 Assert(++nest_count < 1000);
463 while (w(p) != OP_EOF) {
469 p += n*sizeof(struct vms_vector) + 4;
473 case OP_DEFP_START: {
475 p += n*sizeof(struct vms_vector) + 8;
482 Assert(nv > 2); //must have 3 or more points
484 // *wp(p+28) = (short)gr_find_closest_color_15bpp(w(p+28));
486 p += 30 + ((nv&~1)+1)*2;
494 Assert(nv > 2); //must have 3 or more points
496 if (w(p+28) > highest_texture_num)
497 highest_texture_num = w(p+28);
499 p += 30 + ((nv&~1)+1)*2 + nv*12;
506 init_model_sub(p+w(p+28));
507 init_model_sub(p+w(p+30));
519 init_model_sub(p+w(p+16));
532 //init code for bitmap models
533 void g3_init_polygon_model(void *model_ptr)
539 highest_texture_num = -1;
541 init_model_sub((ubyte *) model_ptr);