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dxx-rebirth/similar/main/polyobj.cpp

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/*
* Portions of this file are copyright Rebirth contributors and licensed as
* described in COPYING.txt.
* Portions of this file are copyright Parallax Software and licensed
* according to the Parallax license below.
* See COPYING.txt for license details.
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
*/
/*
*
* Hacked-in polygon objects
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "inferno.h"
#include "robot.h"
#include "vecmat.h"
#include "cntrlcen.h"
#include "interp.h"
#include "dxxerror.h"
#include "u_mem.h"
#include "physfs-serial.h"
#include "physfsx.h"
#ifndef DRIVE
#include "bm.h"
#include "textures.h"
#include "object.h"
#include "lighting.h"
#include "piggy.h"
#endif
#include "render.h"
#if DXX_USE_OGL
#include "ogl_init.h"
#endif
#include "bm.h"
#include "d_zip.h"
#include "partial_range.h"
#include <memory>
#define PM_COMPATIBLE_VERSION 6
#define PM_OBJFILE_VERSION 8
namespace {
static unsigned Pof_file_end;
static unsigned Pof_addr;
#define MODEL_BUF_SIZE 32768
static void _pof_cfseek(int len,int type)
{
switch (type) {
case SEEK_SET: Pof_addr = len; break;
case SEEK_CUR: Pof_addr += len; break;
case SEEK_END:
Assert(len <= 0); // seeking from end, better be moving back.
Pof_addr = Pof_file_end + len;
break;
}
if (Pof_addr > MODEL_BUF_SIZE)
Int3();
}
#define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
static int pof_read_int(ubyte *bufp)
{
int i;
i = *(reinterpret_cast<int *>(&bufp[Pof_addr]));
Pof_addr += 4;
return INTEL_INT(i);
// if (PHYSFS_read(f,&i,sizeof(i),1) != 1)
// Error("Unexpected end-of-file while reading object");
//
// return i;
}
static size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
{
if (Pof_addr + nelem*elsize > Pof_file_end)
return 0;
memcpy(dst, &bufp[Pof_addr], elsize*nelem);
Pof_addr += elsize*nelem;
if (Pof_addr > MODEL_BUF_SIZE)
Int3();
return nelem;
}
// #define new_read_int(i,f) PHYSFS_read((f),&(i),sizeof(i),1)
#define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
static short pof_read_short(ubyte *bufp)
{
short s;
s = *(reinterpret_cast<int16_t *>(&bufp[Pof_addr]));
Pof_addr += 2;
return INTEL_SHORT(s);
// if (PHYSFS_read(f,&s,sizeof(s),1) != 1)
// Error("Unexpected end-of-file while reading object");
//
// return s;
}
static void pof_read_string(char *buf,int max_char, ubyte *bufp)
{
for (int i=0; i<max_char; i++) {
if ((*buf++ = bufp[Pof_addr++]) == 0)
break;
}
// while (max_char-- && (*buf=PHYSFSX_fgetc(f)) != 0) buf++;
}
static void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
{
// PHYSFS_read(f,vecs,sizeof(vms_vector),n);
for (int i = 0; i < n; i++)
{
vecs[i].x = pof_read_int(bufp);
vecs[i].y = pof_read_int(bufp);
vecs[i].z = pof_read_int(bufp);
}
if (Pof_addr > MODEL_BUF_SIZE)
Int3();
}
static void pof_read_angs(vms_angvec *angs,int n,ubyte *bufp)
{
for (int i = 0; i < n; i++)
{
angs[i].p = pof_read_short(bufp);
angs[i].b = pof_read_short(bufp);
angs[i].h = pof_read_short(bufp);
}
if (Pof_addr > MODEL_BUF_SIZE)
Int3();
}
#define ID_OHDR 0x5244484f // 'RDHO' //Object header
#define ID_SOBJ 0x4a424f53 // 'JBOS' //Subobject header
#define ID_GUNS 0x534e5547 // 'SNUG' //List of guns on this object
#define ID_ANIM 0x4d494e41 // 'MINA' //Animation data
#define ID_IDTA 0x41544449 // 'ATDI' //Interpreter data
#define ID_TXTR 0x52545854 // 'RTXT' //Texture filename list
static std::array<std::array<vms_angvec, MAX_SUBMODELS>, N_ANIM_STATES> anim_angs;
//set the animation angles for this robot. Gun fields of robot info must
//be filled in.
//reads a binary file containing a 3d model
static polymodel *read_model_file(polymodel *pm,const char *filename,robot_info *r)
{
short version;
int len, next_chunk;
ubyte model_buf[MODEL_BUF_SIZE];
auto &&[ifile, physfserr] = PHYSFSX_openReadBuffered(filename);
if (!ifile)
Error("Failed to open file <%s>: %s", filename, PHYSFS_getErrorByCode(physfserr));
Assert(PHYSFS_fileLength(ifile) <= MODEL_BUF_SIZE);
Pof_addr = 0;
Pof_file_end = PHYSFS_read(ifile, model_buf, 1, PHYSFS_fileLength(ifile));
ifile.reset();
const int model_id = pof_read_int(model_buf);
if (model_id != 0x4f505350) /* 'OPSP' */
Error("Bad ID in model file <%s>",filename);
version = pof_read_short(model_buf);
if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
Error("Bad version (%d) in model file <%s>",version,filename);
int pof_id;
while (new_pof_read_int(pof_id, model_buf) == 1)
{
pof_id = INTEL_INT(pof_id);
//id = pof_read_int(model_buf);
len = pof_read_int(model_buf);
next_chunk = Pof_addr + len;
switch (pof_id)
{
case ID_OHDR: { //Object header
vms_vector pmmin,pmmax;
pm->n_models = pof_read_int(model_buf);
pm->rad = pof_read_int(model_buf);
Assert(pm->n_models <= MAX_SUBMODELS);
pof_read_vecs(&pmmin,1,model_buf);
pof_read_vecs(&pmmax,1,model_buf);
break;
}
case ID_SOBJ: { //Subobject header
int n;
n = pof_read_short(model_buf);
Assert(n < MAX_SUBMODELS);
pm->submodel_parents[n] = pof_read_short(model_buf);
pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
pm->submodel_rads[n] = pof_read_int(model_buf); //radius
pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
break;
}
#ifndef DRIVE
case ID_GUNS: { //List of guns on this object
if (r) {
vms_vector gun_dir;
r->n_guns = pof_read_int(model_buf);
Assert(r->n_guns <= MAX_GUNS);
for (int i=0;i<r->n_guns;i++) {
const uint_fast32_t gun_id = pof_read_short(model_buf);
/*
* D1 v1.0 boss02.pof has id=4 and r->n_guns==4.
* Relax the assert to check only for memory
* corruption.
*/
assert(gun_id < std::size(r->gun_submodels));
auto &submodel = r->gun_submodels[gun_id];
submodel = pof_read_short(model_buf);
Assert(submodel != 0xff);
pof_read_vecs(&r->gun_points[gun_id], 1, model_buf);
if (version >= 7)
pof_read_vecs(&gun_dir,1,model_buf);
}
}
else
pof_cfseek(model_buf,len,SEEK_CUR);
break;
}
case ID_ANIM: //Animation data
if (r) {
unsigned n_frames;
n_frames = pof_read_short(model_buf);
Assert(n_frames == N_ANIM_STATES);
for (int m=0;m<pm->n_models;m++)
range_for (auto &f, partial_range(anim_angs, n_frames))
pof_read_angs(&f[m], 1, model_buf);
robot_set_angles(r,pm,anim_angs);
}
else
pof_cfseek(model_buf,len,SEEK_CUR);
break;
#endif
case ID_TXTR: { //Texture filename list
int n;
char name_buf[128];
n = pof_read_short(model_buf);
while (n--) {
pof_read_string(name_buf,128,model_buf);
}
break;
}
case ID_IDTA: //Interpreter data
pm->model_data_size = len;
pm->model_data = std::make_unique<uint8_t[]>(pm->model_data_size);
pof_cfread(pm->model_data.get(),1,len,model_buf);
break;
default:
pof_cfseek(model_buf,len,SEEK_CUR);
break;
}
if ( version >= 8 ) // Version 8 needs 4-byte alignment!!!
pof_cfseek(model_buf,next_chunk,SEEK_SET);
}
#if DXX_WORDS_NEED_ALIGNMENT
align_polygon_model_data(pm);
#endif
if constexpr (words_bigendian)
swap_polygon_model_data(pm->model_data.get());
return pm;
}
}
//reads the gun information for a model
//fills in arrays gun_points & gun_dirs, returns the number of guns read
void read_model_guns(const char *filename, reactor &r)
{
auto &gun_points = r.gun_points;
auto &gun_dirs = r.gun_dirs;
short version;
int len;
int n_guns=0;
ubyte model_buf[MODEL_BUF_SIZE];
auto &&[ifile, physfserr] = PHYSFSX_openReadBuffered(filename);
if (!ifile)
Error("Failed to open file <%s>: %s", filename, PHYSFS_getErrorByCode(physfserr));
Assert(PHYSFS_fileLength(ifile) <= MODEL_BUF_SIZE);
Pof_addr = 0;
Pof_file_end = PHYSFS_read(ifile, model_buf, 1, PHYSFS_fileLength(ifile));
ifile.reset();
const int model_id = pof_read_int(model_buf);
if (model_id != 0x4f505350) /* 'OPSP' */
Error("Bad ID in model file <%s>",filename);
version = pof_read_short(model_buf);
Assert(version >= 7); //must be 7 or higher for this data
if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
Error("Bad version (%d) in model file <%s>",version,filename);
int pof_id;
while (new_pof_read_int(pof_id,model_buf) == 1)
{
pof_id = INTEL_INT(pof_id);
//id = pof_read_int(model_buf);
len = pof_read_int(model_buf);
if (pof_id == ID_GUNS)
{ //List of guns on this object
n_guns = pof_read_int(model_buf);
for (int i=0;i<n_guns;i++) {
int sm;
const int gun_id = pof_read_short(model_buf);
sm = pof_read_short(model_buf);
if (sm!=0)
Error("Invalid gun submodel in file <%s>",filename);
pof_read_vecs(&gun_points[gun_id], 1, model_buf);
pof_read_vecs(&gun_dirs[gun_id], 1, model_buf);
}
}
else
pof_cfseek(model_buf,len,SEEK_CUR);
}
r.n_guns = n_guns;
}
namespace dcx {
//free up a model, getting rid of all its memory
#if defined(DXX_BUILD_DESCENT_I)
static
#endif
void free_model(polymodel &po)
{
po.model_data.reset();
}
}
//draw a polygon model
namespace dsx {
void draw_polygon_model(grs_canvas &canvas, const vms_vector &pos, const vms_matrix &orient, const submodel_angles anim_angles, const unsigned model_num, unsigned flags, const g3s_lrgb light, const glow_values_t *const glow_values, alternate_textures alt_textures)
{
auto &Polygon_models = LevelSharedPolygonModelState.Polygon_models;
const polymodel *po = &Polygon_models[model_num];
//check if should use simple model
if (po->simpler_model ) //must have a simpler model
if (flags==0) //can't switch if this is debris
//alt textures might not match, but in the one case we're using this
//for on 11/14/94, they do match. So we leave it in.
{
int cnt=1;
const auto depth = g3_calc_point_depth(pos); //gets 3d depth
while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
po = &Polygon_models[po->simpler_model-1];
}
std::array<grs_bitmap *, MAX_POLYOBJ_TEXTURES> texture_list;
{
const unsigned n_textures = po->n_textures;
std::array<bitmap_index, MAX_POLYOBJ_TEXTURES> texture_list_index;
auto &&tlir = partial_range(texture_list_index, n_textures);
if (alt_textures)
{
for (auto &&[at, tli] : zip(unchecked_partial_range(static_cast<const bitmap_index *>(alt_textures), n_textures), tlir))
tli = at;
}
else
{
const unsigned first_texture = po->first_texture;
for (auto &&[obp, tli] : zip(partial_range(ObjBitmapPtrs, first_texture, first_texture + n_textures), tlir))
tli = ObjBitmaps[obp];
}
// Make sure the textures for this object are paged in...
for (auto &&[tli, tl] : zip(tlir, partial_range(texture_list, n_textures)))
{
tl = &GameBitmaps[tli.index];
PIGGY_PAGE_IN(tli);
}
}
// Hmmm... cache got flushed in the middle of paging all these in,
// so we need to reread them all in.
// Make sure that they can all fit in memory.
auto &&ctx = g3_start_instance_matrix(pos, orient);
polygon_model_points robot_points;
if (flags == 0) //draw entire object
g3_draw_polygon_model(&texture_list[0], robot_points, canvas, anim_angles, light, glow_values, po->model_data.get());
else {
for (int i=0;flags;flags>>=1,i++)
if (flags & 1) {
Assert(i < po->n_models);
//if submodel, rotate around its center point, not pivot point
auto &&subctx = g3_start_instance_matrix();
g3_draw_polygon_model(&texture_list[0], robot_points, canvas, anim_angles, light, glow_values, &po->model_data[po->submodel_ptrs[i]]);
g3_done_instance(subctx);
}
}
g3_done_instance(ctx);
}
void free_polygon_models(d_level_shared_polygon_model_state &LevelSharedPolygonModelState)
{
for (auto &i : partial_range(LevelSharedPolygonModelState.Polygon_models, LevelSharedPolygonModelState.N_polygon_models))
free_model(i);
#if defined(DXX_BUILD_DESCENT_II)
LevelSharedPolygonModelState.Exit_models_loaded = false;
#endif
}
}
namespace dcx {
namespace {
static void assign_max(fix &a, const fix &b)
{
a = std::max(a, b);
}
static void assign_min(fix &a, const fix &b)
{
a = std::min(a, b);
}
template <fix vms_vector::*p>
static void update_bounds(vms_vector &minv, vms_vector &maxv, const vms_vector &vp)
{
auto &mx = maxv.*p;
assign_max(mx, vp.*p);
auto &mn = minv.*p;
assign_min(mn, vp.*p);
}
static void assign_minmax(vms_vector &minv, vms_vector &maxv, const vms_vector &v)
{
update_bounds<&vms_vector::x>(minv, maxv, v);
update_bounds<&vms_vector::y>(minv, maxv, v);
update_bounds<&vms_vector::z>(minv, maxv, v);
}
static void polyobj_find_min_max(polymodel *pm)
{
auto &big_mn = pm->mins;
auto &big_mx = pm->maxs;
for (int m=0;m<pm->n_models;m++) {
auto &mn = pm->submodel_mins[m];
auto &mx = pm->submodel_maxs[m];
const auto &ofs = pm->submodel_offsets[m];
auto data = reinterpret_cast<const uint16_t *>(&pm->model_data[pm->submodel_ptrs[m]]);
const auto type = *data++;
Assert(type == 7 || type == 1);
const uint16_t nverts = *data++ - 1;
if (type==7)
data+=2; //skip start & pad
auto vp = reinterpret_cast<const vms_vector *>(data);
mn = mx = *vp++;
if (m==0)
big_mn = big_mx = mn;
range_for (auto &v, unchecked_partial_range(vp, nverts))
{
assign_minmax(mn, mx, v);
assign_minmax(big_mn, big_mx, vm_vec_add(v, ofs));
}
}
}
}
void init_polygon_models(d_level_shared_polygon_model_state &LevelSharedPolygonModelState)
{
LevelSharedPolygonModelState.N_polygon_models = 0;
}
}
namespace dsx {
//returns the number of this model
int load_polygon_model(const char *filename,int n_textures,int first_texture,robot_info *r)
{
Assert(n_textures < MAX_POLYOBJ_TEXTURES);
Assert(strlen(filename) <= 12);
const auto n_models = LevelSharedPolygonModelState.N_polygon_models;
strcpy(LevelSharedPolygonModelState.Pof_names[n_models], filename);
auto &Polygon_models = LevelSharedPolygonModelState.Polygon_models;
auto &model = Polygon_models[n_models];
read_model_file(&model, filename, r);
polyobj_find_min_max(&model);
const auto highest_texture_num = g3_init_polygon_model(model.model_data.get(), model.model_data_size);
if (highest_texture_num+1 != n_textures)
Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
model.n_textures = n_textures;
model.first_texture = first_texture;
model.simpler_model = 0;
return LevelSharedPolygonModelState.N_polygon_models++;
}
}
//compare against this size when figuring how far to place eye for picture
#define BASE_MODEL_SIZE 0x28000
#define DEFAULT_VIEW_DIST 0x60000
//draws the given model in the current canvas. The distance is set to
//more-or-less fill the canvas. Note that this routine actually renders
//into an off-screen canvas that it creates, then copies to the current
//canvas.
void draw_model_picture(grs_canvas &canvas, const uint_fast32_t mn, const vms_angvec &orient_angles)
{
g3s_lrgb lrgb = { f1_0, f1_0, f1_0 };
gr_clear_canvas(canvas, BM_XRGB(0,0,0));
g3_start_frame(canvas);
vms_vector temp_pos{};
g3_set_view_matrix(temp_pos,vmd_identity_matrix,0x9000);
auto &Polygon_models = LevelSharedPolygonModelState.Polygon_models;
if (Polygon_models[mn].rad != 0)
temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
else
temp_pos.z = DEFAULT_VIEW_DIST;
const auto &&temp_orient = vm_angles_2_matrix(orient_angles);
draw_polygon_model(canvas, temp_pos, temp_orient, nullptr, mn, 0, lrgb, nullptr, nullptr);
g3_end_frame();
}
namespace dcx {
DEFINE_SERIAL_VMS_VECTOR_TO_MESSAGE();
DEFINE_SERIAL_UDT_TO_MESSAGE(polymodel, p, (p.n_models, p.model_data_size, serial::pad<4>(), p.submodel_ptrs, p.submodel_offsets, p.submodel_norms, p.submodel_pnts, p.submodel_rads, p.submodel_parents, p.submodel_mins, p.submodel_maxs, p.mins, p.maxs, p.rad, p.n_textures, p.first_texture, p.simpler_model));
ASSERT_SERIAL_UDT_MESSAGE_SIZE(polymodel, 12 + (10 * 4) + (10 * 3 * sizeof(vms_vector)) + (10 * sizeof(fix)) + 10 + (10 * 2 * sizeof(vms_vector)) + (2 * sizeof(vms_vector)) + 8);
/*
* reads a polymodel structure from a PHYSFS_File
*/
void polymodel_read(polymodel *pm, PHYSFS_File *fp)
{
pm->model_data.reset();
PHYSFSX_serialize_read(fp, *pm);
}
}
#if 0
void polymodel_write(PHYSFS_File *fp, const polymodel &pm)
{
PHYSFSX_serialize_write(fp, pm);
}
#endif
/*
* routine which allocates, reads, and inits a polymodel's model_data
*/
namespace dsx {
void polygon_model_data_read(polymodel *pm, PHYSFS_File *fp)
{
auto model_data_size = pm->model_data_size;
pm->model_data = std::make_unique<uint8_t[]>(model_data_size);
PHYSFS_read(fp, pm->model_data, sizeof(uint8_t), model_data_size);
#if DXX_WORDS_NEED_ALIGNMENT
/* Aligning model data changes pm->model_data_size. Reload it
* afterward.
*/
align_polygon_model_data(pm);
model_data_size = pm->model_data_size;
#endif
if constexpr (words_bigendian)
swap_polygon_model_data(pm->model_data.get());
#if defined(DXX_BUILD_DESCENT_I)
g3_validate_polygon_model(pm->model_data.get(), model_data_size);
#elif defined(DXX_BUILD_DESCENT_II)
g3_init_polygon_model(pm->model_data.get(), model_data_size);
#endif
}
}
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