754 lines
16 KiB
C++
754 lines
16 KiB
C++
/*
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* This file is part of the DXX-Rebirth project <http://www.dxx-rebirth.com/>.
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* It is copyright by its individual contributors, as recorded in the
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* project's Git history. See COPYING.txt at the top level for license
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* terms and a link to the Git history.
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*/
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/*
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*
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* Polygon object interpreter
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*
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*/
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#include <stdlib.h>
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#include "dxxerror.h"
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#include "interp.h"
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#include "common/3d/globvars.h"
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#include "gr.h"
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#include "byteutil.h"
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#include "u_mem.h"
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static const unsigned OP_EOF = 0; //eof
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static const unsigned OP_DEFPOINTS = 1; //defpoints
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static const unsigned OP_FLATPOLY = 2; //flat-shaded polygon
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static const unsigned OP_TMAPPOLY = 3; //texture-mapped polygon
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static const unsigned OP_SORTNORM = 4; //sort by normal
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static const unsigned OP_RODBM = 5; //rod bitmap
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static const unsigned OP_SUBCALL = 6; //call a subobject
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static const unsigned OP_DEFP_START = 7; //defpoints with start
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static const unsigned OP_GLOW = 8; //glow value for next poly
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short highest_texture_num;
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int g3d_interp_outline;
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g3s_point *Interp_point_list = NULL;
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#define MAX_INTERP_COLORS 100
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//gives the interpreter an array of points to use
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void g3_set_interp_points(g3s_point *pointlist)
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{
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Interp_point_list = pointlist;
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}
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#define w(p) (*((short *) (p)))
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#define wp(p) ((short *) (p))
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#define fp(p) ((fix *) (p))
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#define vp(p) ((vms_vector *) (p))
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static void rotate_point_list(g3s_point *dest,vms_vector *src,int n)
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{
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while (n--)
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g3_rotate_point(*dest++,*src++);
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}
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static const vms_angvec zero_angles = {0,0,0};
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#ifdef WORDS_BIGENDIAN
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void short_swap(short *s)
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{
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*s = SWAPSHORT(*s);
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}
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static void fix_swap(fix &f)
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{
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f = (fix)SWAPINT((int)f);
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}
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static void fix_swap(fix *f)
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{
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fix_swap(*f);
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}
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void vms_vector_swap(vms_vector &v)
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{
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fix_swap(v.x);
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fix_swap(v.y);
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fix_swap(v.z);
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}
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static void fixang_swap(fixang &f)
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{
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f = (fixang)SWAPSHORT((short)f);
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}
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void vms_angvec_swap(vms_angvec &v)
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{
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fixang_swap(v.p);
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fixang_swap(v.b);
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fixang_swap(v.h);
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}
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void swap_polygon_model_data(ubyte *data)
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{
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int i;
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short n;
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g3s_uvl *uvl_val;
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ubyte *p = data;
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short_swap(wp(p));
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while (w(p) != OP_EOF) {
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switch (w(p)) {
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case OP_DEFPOINTS:
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short_swap(wp(p + 2));
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n = w(p+2);
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for (i = 0; i < n; i++)
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vms_vector_swap(vp((p + 4) + (i * sizeof(vms_vector))));
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p += n*sizeof(struct vms_vector) + 4;
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break;
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case OP_DEFP_START:
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short_swap(wp(p + 2));
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short_swap(wp(p + 4));
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n = w(p+2);
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for (i = 0; i < n; i++)
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vms_vector_swap(vp((p + 8) + (i * sizeof(vms_vector))));
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p += n*sizeof(struct vms_vector) + 8;
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break;
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case OP_FLATPOLY:
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short_swap(wp(p+2));
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n = w(p+2);
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vms_vector_swap(vp(p + 4));
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vms_vector_swap(vp(p + 16));
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short_swap(wp(p+28));
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for (i=0; i < n; i++)
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short_swap(wp(p + 30 + (i * 2)));
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p += 30 + ((n&~1)+1)*2;
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break;
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case OP_TMAPPOLY:
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short_swap(wp(p+2));
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n = w(p+2);
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vms_vector_swap(vp(p + 4));
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vms_vector_swap(vp(p + 16));
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for (i=0;i<n;i++) {
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uvl_val = (g3s_uvl *)((p+30+((n&~1)+1)*2) + (i * sizeof(g3s_uvl)));
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fix_swap(&uvl_val->u);
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fix_swap(&uvl_val->v);
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}
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short_swap(wp(p+28));
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for (i=0;i<n;i++)
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short_swap(wp(p + 30 + (i * 2)));
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p += 30 + ((n&~1)+1)*2 + n*12;
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break;
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case OP_SORTNORM:
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vms_vector_swap(vp(p + 4));
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vms_vector_swap(vp(p + 16));
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short_swap(wp(p + 28));
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short_swap(wp(p + 30));
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swap_polygon_model_data(p + w(p+28));
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swap_polygon_model_data(p + w(p+30));
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p += 32;
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break;
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case OP_RODBM:
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vms_vector_swap(vp(p + 20));
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vms_vector_swap(vp(p + 4));
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short_swap(wp(p+2));
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fix_swap(fp(p + 16));
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fix_swap(fp(p + 32));
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p+=36;
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break;
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case OP_SUBCALL:
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short_swap(wp(p+2));
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vms_vector_swap(vp(p+4));
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short_swap(wp(p+16));
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swap_polygon_model_data(p + w(p+16));
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p += 20;
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break;
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case OP_GLOW:
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short_swap(wp(p + 2));
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p += 4;
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break;
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default:
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Error("invalid polygon model\n"); //Int3();
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}
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short_swap(wp(p));
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}
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}
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#endif
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#ifdef WORDS_NEED_ALIGNMENT
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void add_chunk(ubyte *old_base, ubyte *new_base, int offset,
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chunk *chunk_list, int *no_chunks)
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{
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Assert(*no_chunks + 1 < MAX_CHUNKS); //increase MAX_CHUNKS if you get this
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chunk_list[*no_chunks].old_base = old_base;
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chunk_list[*no_chunks].new_base = new_base;
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chunk_list[*no_chunks].offset = offset;
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chunk_list[*no_chunks].correction = 0;
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(*no_chunks)++;
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}
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/*
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* finds what chunks the data points to, adds them to the chunk_list,
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* and returns the length of the current chunk
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*/
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int get_chunks(ubyte *data, ubyte *new_data, chunk *list, int *no)
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{
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short n;
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ubyte *p = data;
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while (INTEL_SHORT(w(p)) != OP_EOF) {
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switch (INTEL_SHORT(w(p))) {
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case OP_DEFPOINTS:
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n = INTEL_SHORT(w(p+2));
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p += n*sizeof(struct vms_vector) + 4;
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break;
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case OP_DEFP_START:
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n = INTEL_SHORT(w(p+2));
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p += n*sizeof(struct vms_vector) + 8;
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break;
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case OP_FLATPOLY:
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n = INTEL_SHORT(w(p+2));
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p += 30 + ((n&~1)+1)*2;
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break;
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case OP_TMAPPOLY:
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n = INTEL_SHORT(w(p+2));
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p += 30 + ((n&~1)+1)*2 + n*12;
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break;
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case OP_SORTNORM:
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add_chunk(p, p - data + new_data, 28, list, no);
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add_chunk(p, p - data + new_data, 30, list, no);
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p += 32;
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break;
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case OP_RODBM:
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p+=36;
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break;
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case OP_SUBCALL:
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add_chunk(p, p - data + new_data, 16, list, no);
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p+=20;
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break;
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case OP_GLOW:
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p += 4;
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break;
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default:
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Error("invalid polygon model\n");
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}
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}
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return p + 2 - data;
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}
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#endif //def WORDS_NEED_ALIGNMENT
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// check a polymodel for it's color and return it
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int g3_poly_get_color(ubyte *p)
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{
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int color = 0;
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while (w(p) != OP_EOF)
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switch (w(p)) {
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case OP_DEFPOINTS:
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p += w(p+2)*sizeof(struct vms_vector) + 4;
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break;
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case OP_DEFP_START:
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p += w(p+2)*sizeof(struct vms_vector) + 8;
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break;
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case OP_FLATPOLY: {
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uint_fast32_t nv = w(p+2);
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Assert( nv < MAX_POINTS_PER_POLY );
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if (g3_check_normal_facing(*vp(p+4),*vp(p+16)) > 0) {
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#if defined(DXX_BUILD_DESCENT_I)
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color = (w(p+28));
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#elif defined(DXX_BUILD_DESCENT_II)
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color = gr_find_closest_color_15bpp(w(p + 28));
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#endif
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}
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p += 30 + ((nv&~1)+1)*2;
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break;
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}
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case OP_TMAPPOLY: {
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int nv = w(p+2);
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p += 30 + ((nv&~1)+1)*2 + nv*12;
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break;
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}
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case OP_SORTNORM:
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if (g3_check_normal_facing(*vp(p+16),*vp(p+4)) > 0) //facing
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color = g3_poly_get_color(p+w(p+28));
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else //not facing
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color = g3_poly_get_color(p+w(p+30));
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p += 32;
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break;
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case OP_RODBM:
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p+=36;
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break;
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case OP_SUBCALL:
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#if defined(DXX_BUILD_DESCENT_I)
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color = g3_poly_get_color(p+w(p+16));
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#endif
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p += 20;
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break;
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case OP_GLOW:
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p += 4;
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break;
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default:
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#if defined(DXX_BUILD_DESCENT_I)
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;
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#elif defined(DXX_BUILD_DESCENT_II)
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Error("invalid polygon model\n");
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#endif
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}
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return color;
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}
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//calls the object interpreter to render an object. The object renderer
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//is really a seperate pipeline. returns true if drew
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void g3_draw_polygon_model(ubyte *p,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,g3s_lrgb model_light,glow_values_t *glow_values)
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{
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unsigned glow_num = ~0; //glow off by default
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while (w(p) != OP_EOF)
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switch (w(p)) {
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case OP_DEFPOINTS: {
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int n = w(p+2);
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rotate_point_list(Interp_point_list,vp(p+4),n);
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p += n*sizeof(struct vms_vector) + 4;
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break;
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}
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case OP_DEFP_START: {
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int n = w(p+2);
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int s = w(p+4);
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rotate_point_list(&Interp_point_list[s],vp(p+8),n);
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p += n*sizeof(struct vms_vector) + 8;
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break;
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}
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case OP_FLATPOLY: {
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uint_fast32_t nv = w(p+2);
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Assert( nv < MAX_POINTS_PER_POLY );
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if (g3_check_normal_facing(*vp(p+4),*vp(p+16)) > 0) {
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array<g3s_point *, MAX_POINTS_PER_POLY> point_list;
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for (uint_fast32_t i = 0;i < nv;i++)
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point_list[i] = Interp_point_list + wp(p+30)[i];
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#if defined(DXX_BUILD_DESCENT_II)
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if (!glow_values || !(glow_num < glow_values->size()) || (*glow_values)[glow_num] != -3)
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#endif
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{
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// DPH: Now we treat this color as 15bpp
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#if defined(DXX_BUILD_DESCENT_I)
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gr_setcolor(w(p+28));
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#elif defined(DXX_BUILD_DESCENT_II)
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if (glow_values && glow_num < glow_values->size() && (*glow_values)[glow_num] == -2)
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gr_setcolor(255);
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else
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{
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gr_setcolor(gr_find_closest_color_15bpp(w(p + 28)));
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}
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#endif
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g3_draw_poly(nv,&point_list[0]);
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}
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}
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p += 30 + ((nv&~1)+1)*2;
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break;
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}
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case OP_TMAPPOLY: {
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uint_fast32_t nv = w(p+2);
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Assert( nv < MAX_POINTS_PER_POLY );
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if (g3_check_normal_facing(*vp(p+4),*vp(p+16)) > 0) {
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g3s_lrgb light;
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//calculate light from surface normal
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if (!glow_values || !(glow_num < glow_values->size())) //no glow
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{
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light.r = light.g = light.b = -vm_vec_dot(View_matrix.fvec,*vp(p+16));
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light.r = f1_0/4 + (light.r*3)/4;
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light.r = fixmul(light.r,model_light.r);
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light.g = f1_0/4 + (light.g*3)/4;
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light.g = fixmul(light.g,model_light.g);
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light.b = f1_0/4 + (light.b*3)/4;
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light.b = fixmul(light.b,model_light.b);
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}
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else //yes glow
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{
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light.r = light.g = light.b = (*glow_values)[glow_num];
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glow_num = -1;
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}
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//now poke light into l values
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array<g3s_uvl, MAX_POINTS_PER_POLY> uvl_list;
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array<g3s_lrgb, MAX_POINTS_PER_POLY> lrgb_list;
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for (uint_fast32_t i = 0; i < nv; i++)
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{
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lrgb_list[i] = light;
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uvl_list[i] = ((g3s_uvl *) (p+30+((nv&~1)+1)*2))[i];
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uvl_list[i].l = (light.r+light.g+light.b)/3;
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}
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array<g3s_point *, MAX_POINTS_PER_POLY> point_list;
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for (uint_fast32_t i = 0; i < nv; i++)
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point_list[i] = Interp_point_list + wp(p+30)[i];
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g3_draw_tmap(nv,&point_list[0],uvl_list,lrgb_list,model_bitmaps[w(p+28)]);
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}
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p += 30 + ((nv&~1)+1)*2 + nv*12;
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break;
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}
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case OP_SORTNORM:
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if (g3_check_normal_facing(*vp(p+16),*vp(p+4)) > 0) { //facing
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//draw back then front
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g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
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g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
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}
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else { //not facing. draw front then back
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g3_draw_polygon_model(p+w(p+28),model_bitmaps,anim_angles,model_light,glow_values);
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g3_draw_polygon_model(p+w(p+30),model_bitmaps,anim_angles,model_light,glow_values);
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}
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p += 32;
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break;
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case OP_RODBM: {
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g3s_point rod_bot_p,rod_top_p;
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g3s_lrgb rodbm_light = { f1_0, f1_0, f1_0 };
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g3_rotate_point(rod_bot_p,*vp(p+20));
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g3_rotate_point(rod_top_p,*vp(p+4));
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g3_draw_rod_tmap(model_bitmaps[w(p+2)],&rod_bot_p,w(p+16),&rod_top_p,w(p+32),rodbm_light);
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p+=36;
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break;
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}
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case OP_SUBCALL: {
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const vms_angvec *a;
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if (anim_angles)
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a = &anim_angles[w(p+2)];
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else
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a = &zero_angles;
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g3_start_instance_angles(*vp(p+4),a);
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g3_draw_polygon_model(p+w(p+16),model_bitmaps,anim_angles,model_light,glow_values);
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g3_done_instance();
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p += 20;
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break;
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}
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case OP_GLOW:
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if (glow_values)
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glow_num = w(p+2);
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p += 4;
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break;
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default:
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#if defined(DXX_BUILD_DESCENT_I)
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;
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#elif defined(DXX_BUILD_DESCENT_II)
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Error("invalid polygon model\n");
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#endif
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}
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}
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#ifndef NDEBUG
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int nest_count;
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#endif
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//alternate interpreter for morphing object
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void g3_draw_morphing_model(ubyte *p,grs_bitmap **model_bitmaps,vms_angvec *anim_angles,g3s_lrgb model_light,vms_vector *new_points)
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{
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glow_values_t *glow_values = NULL;
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unsigned glow_num = ~0; //glow off by default
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while (w(p) != OP_EOF)
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switch (w(p)) {
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|
|
|
case OP_DEFPOINTS: {
|
|
int n = w(p+2);
|
|
|
|
rotate_point_list(Interp_point_list,new_points,n);
|
|
p += n*sizeof(struct vms_vector) + 4;
|
|
|
|
break;
|
|
}
|
|
|
|
case OP_DEFP_START: {
|
|
int n = w(p+2);
|
|
int s = w(p+4);
|
|
|
|
rotate_point_list(&Interp_point_list[s],new_points,n);
|
|
p += n*sizeof(struct vms_vector) + 8;
|
|
|
|
break;
|
|
}
|
|
|
|
case OP_FLATPOLY: {
|
|
int nv = w(p+2);
|
|
int i,ntris;
|
|
|
|
#if defined(DXX_BUILD_DESCENT_I)
|
|
gr_setcolor(55/*w(p+28)*/);
|
|
#elif defined(DXX_BUILD_DESCENT_II)
|
|
gr_setcolor(w(p+28));
|
|
#endif
|
|
|
|
array<g3s_point *, 3> point_list;
|
|
for (i=0;i<2;i++)
|
|
point_list[i] = Interp_point_list + wp(p+30)[i];
|
|
|
|
for (ntris=nv-2;ntris;ntris--) {
|
|
|
|
point_list[2] = Interp_point_list + wp(p+30)[i++];
|
|
|
|
g3_check_and_draw_poly(3, &point_list[0]);
|
|
|
|
point_list[1] = point_list[2];
|
|
|
|
}
|
|
|
|
p += 30 + ((nv&~1)+1)*2;
|
|
|
|
break;
|
|
}
|
|
|
|
case OP_TMAPPOLY: {
|
|
int nv = w(p+2);
|
|
g3s_lrgb light;
|
|
int i,ntris;
|
|
|
|
//calculate light from surface normal
|
|
if (!glow_values || !(glow_num < glow_values->size())) //no glow
|
|
{
|
|
light.r = light.g = light.b = -vm_vec_dot(View_matrix.fvec,*vp(p+16));
|
|
light.r = f1_0/4 + (light.r*3)/4;
|
|
light.r = fixmul(light.r,model_light.r);
|
|
light.g = f1_0/4 + (light.g*3)/4;
|
|
light.g = fixmul(light.g,model_light.g);
|
|
light.b = f1_0/4 + (light.b*3)/4;
|
|
light.b = fixmul(light.b,model_light.b);
|
|
}
|
|
else //yes glow
|
|
{
|
|
light.r = light.g = light.b = (*glow_values)[glow_num];
|
|
glow_num = -1;
|
|
}
|
|
|
|
//now poke light into l values
|
|
|
|
array<g3s_uvl, 3> uvl_list;
|
|
array<g3s_lrgb, 3> lrgb_list;
|
|
for (unsigned i = 0; i < 3; ++i)
|
|
uvl_list[i] = ((g3s_uvl *) (p+30+((nv&~1)+1)*2))[i];
|
|
lrgb_list.fill(light);
|
|
|
|
array<g3s_point *, 3> point_list;
|
|
for (i=0;i<2;i++) {
|
|
point_list[i] = Interp_point_list + wp(p+30)[i];
|
|
}
|
|
|
|
for (ntris=nv-2;ntris;ntris--) {
|
|
|
|
point_list[2] = Interp_point_list + wp(p+30)[i];
|
|
i++;
|
|
g3_check_and_draw_tmap(&point_list[0],uvl_list,lrgb_list,model_bitmaps[w(p+28)]);
|
|
point_list[1] = point_list[2];
|
|
}
|
|
|
|
p += 30 + ((nv&~1)+1)*2 + nv*12;
|
|
|
|
break;
|
|
}
|
|
|
|
case OP_SORTNORM:
|
|
|
|
if (g3_check_normal_facing(*vp(p+16),*vp(p+4)) > 0) { //facing
|
|
|
|
//draw back then front
|
|
|
|
g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
|
|
g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
|
|
|
|
}
|
|
else { //not facing. draw front then back
|
|
|
|
g3_draw_morphing_model(p+w(p+28),model_bitmaps,anim_angles,model_light,new_points);
|
|
g3_draw_morphing_model(p+w(p+30),model_bitmaps,anim_angles,model_light,new_points);
|
|
}
|
|
|
|
p += 32;
|
|
|
|
break;
|
|
|
|
|
|
case OP_RODBM: {
|
|
g3s_point rod_bot_p,rod_top_p;
|
|
g3s_lrgb rodbm_light = { f1_0, f1_0, f1_0 };
|
|
|
|
g3_rotate_point(rod_bot_p,*vp(p+20));
|
|
g3_rotate_point(rod_top_p,*vp(p+4));
|
|
|
|
g3_draw_rod_tmap(model_bitmaps[w(p+2)],&rod_bot_p,w(p+16),&rod_top_p,w(p+32),rodbm_light);
|
|
|
|
p+=36;
|
|
break;
|
|
}
|
|
|
|
case OP_SUBCALL: {
|
|
const vms_angvec *a;
|
|
|
|
if (anim_angles)
|
|
a = &anim_angles[w(p+2)];
|
|
else
|
|
a = &zero_angles;
|
|
|
|
g3_start_instance_angles(*vp(p+4),a);
|
|
|
|
g3_draw_polygon_model(p+w(p+16),model_bitmaps,anim_angles,model_light,glow_values);
|
|
|
|
g3_done_instance();
|
|
|
|
p += 20;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case OP_GLOW:
|
|
|
|
if (glow_values)
|
|
glow_num = w(p+2);
|
|
p += 4;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void init_model_sub(ubyte *p)
|
|
{
|
|
Assert(++nest_count < 1000);
|
|
|
|
while (w(p) != OP_EOF) {
|
|
|
|
switch (w(p)) {
|
|
|
|
case OP_DEFPOINTS: {
|
|
int n = w(p+2);
|
|
p += n*sizeof(struct vms_vector) + 4;
|
|
break;
|
|
}
|
|
|
|
case OP_DEFP_START: {
|
|
int n = w(p+2);
|
|
p += n*sizeof(struct vms_vector) + 8;
|
|
break;
|
|
}
|
|
|
|
case OP_FLATPOLY: {
|
|
int nv = w(p+2);
|
|
|
|
Assert(nv > 2); //must have 3 or more points
|
|
|
|
#if defined(DXX_BUILD_DESCENT_I)
|
|
*wp(p+28) = (short)gr_find_closest_color_15bpp(w(p+28));
|
|
#endif
|
|
|
|
p += 30 + ((nv&~1)+1)*2;
|
|
|
|
break;
|
|
}
|
|
|
|
case OP_TMAPPOLY: {
|
|
int nv = w(p+2);
|
|
|
|
Assert(nv > 2); //must have 3 or more points
|
|
|
|
if (w(p+28) > highest_texture_num)
|
|
highest_texture_num = w(p+28);
|
|
|
|
p += 30 + ((nv&~1)+1)*2 + nv*12;
|
|
|
|
break;
|
|
}
|
|
|
|
case OP_SORTNORM:
|
|
|
|
init_model_sub(p+w(p+28));
|
|
init_model_sub(p+w(p+30));
|
|
p += 32;
|
|
|
|
break;
|
|
|
|
|
|
case OP_RODBM:
|
|
p += 36;
|
|
break;
|
|
|
|
|
|
case OP_SUBCALL: {
|
|
init_model_sub(p+w(p+16));
|
|
p += 20;
|
|
break;
|
|
|
|
}
|
|
|
|
case OP_GLOW:
|
|
p += 4;
|
|
break;
|
|
#if defined(DXX_BUILD_DESCENT_II)
|
|
default:
|
|
Error("invalid polygon model\n");
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
//init code for bitmap models
|
|
void g3_init_polygon_model(void *model_ptr)
|
|
{
|
|
#ifndef NDEBUG
|
|
nest_count = 0;
|
|
#endif
|
|
|
|
highest_texture_num = -1;
|
|
|
|
init_model_sub((ubyte *) model_ptr);
|
|
}
|