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m3d.h
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m3d.h
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/*
* m3d.h
* https://gitlab.com/bztsrc/model3d
*
* Copyright (C) 2020 bzt (bztsrc@gitlab)
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* @brief ANSI C89 / C++11 single header importer / exporter SDK for the Model 3D (.M3D) format
* https://gitlab.com/bztsrc/model3d
*
* PNG decompressor included from (with minor modifications to make it C89 valid):
* stb_image - v2.13 - public domain image loader - http://nothings.org/stb_image.h
*
* @version: 1.0.0
*/
#ifndef _M3D_H_
#define _M3D_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
/*** configuration ***/
#ifndef M3D_MALLOC
# define M3D_MALLOC(sz) malloc(sz)
#endif
#ifndef M3D_REALLOC
# define M3D_REALLOC(p,nsz) realloc(p,nsz)
#endif
#ifndef M3D_FREE
# define M3D_FREE(p) free(p)
#endif
#ifndef M3D_LOG
# define M3D_LOG(x)
#endif
#ifndef M3D_APIVERSION
#define M3D_APIVERSION 0x0100
#ifndef M3D_DOUBLE
typedef float M3D_FLOAT;
#ifndef M3D_EPSILON
/* carefully choosen for IEEE 754 don't change */
#define M3D_EPSILON ((M3D_FLOAT)1e-7)
#endif
#else
typedef double M3D_FLOAT;
#ifndef M3D_EPSILON
#define M3D_EPSILON ((M3D_FLOAT)1e-14)
#endif
#endif
#if !defined(M3D_SMALLINDEX)
typedef uint32_t M3D_INDEX;
typedef uint16_t M3D_VOXEL;
#define M3D_UNDEF 0xffffffff
#define M3D_INDEXMAX 0xfffffffe
#define M3D_VOXUNDEF 0xffff
#define M3D_VOXCLEAR 0xfffe
#else
typedef uint16_t M3D_INDEX;
typedef uint8_t M3D_VOXEL;
#define M3D_UNDEF 0xffff
#define M3D_INDEXMAX 0xfffe
#define M3D_VOXUNDEF 0xff
#define M3D_VOXCLEAR 0xfe
#endif
#define M3D_NOTDEFINED 0xffffffff
#ifndef M3D_NUMBONE
#define M3D_NUMBONE 4
#endif
#ifndef M3D_BONEMAXLEVEL
#define M3D_BONEMAXLEVEL 64
#endif
#ifndef _MSC_VER
#ifndef _inline
#define _inline __inline__
#endif
#define _pack __attribute__((packed))
#define _unused __attribute__((unused))
#else
#define _inline
#define _pack
#define _unused __pragma(warning(suppress:4100))
#endif
#ifndef __cplusplus
#define _register register
#else
#define _register
#endif
/*** File format structures ***/
/**
* M3D file format structure
* 3DMO m3dchunk_t file header chunk, may followed by compressed data
* PRVW preview chunk (optional)
* HEAD m3dhdr_t model header chunk
* n x m3dchunk_t more chunks follow
* CMAP color map chunk (optional)
* TMAP texture map chunk (optional)
* VRTS vertex data chunk (optional if it's a material library)
* BONE bind-pose skeleton, bone hierarchy chunk (optional)
* n x m3db_t contains propably more, but at least one bone
* n x m3ds_t skin group records
* MTRL* material chunk(s), can be more (optional)
* n x m3dp_t each material contains propapbly more, but at least one property
* the properties are configurable with a static array, see m3d_propertytypes
* n x m3dchunk_t at least one, but maybe more face chunks
* PROC* procedural face, or
* MESH* triangle mesh (vertex index list) or
* VOXT, VOXD* voxel image (converted to mesh) or
* SHPE* mathematical shapes like parameterized surfaces
* LBLS* annotation label chunks, can be more (optional)
* ACTN* action chunk(s), animation-pose skeletons, can be more (optional)
* n x m3dfr_t each action contains probably more, but at least one frame
* n x m3dtr_t each frame contains probably more, but at least one transformation
* ASET* inlined asset chunk(s), can be more (optional)
* OMD3 end chunk
*
* Typical chunks for a game engine: 3DMO, HEAD, CMAP, TMAP, VRTS, BONE, MTRL, MESH, ACTN, OMD3
* Typical chunks for distibution: 3DMO, PRVW, HEAD, CMAP, TMAP, VRTS, BONE, MTRL, MESH, ACTN, ASET, OMD3
* Typical chunks for voxel image: 3DMO, HEAD, CMAP, MTRL, VOXT, VOXD, VOXD, VOXD, OMD3
* Typical chunks for CAD software: 3DMO, PRVW, HEAD, CMAP, TMAP, VRTS, MTRL, SHPE, LBLS, OMD3
*/
#ifdef _MSC_VER
#pragma pack(push)
#pragma pack(1)
#endif
typedef struct {
char magic[4];
uint32_t length;
float scale; /* deliberately not M3D_FLOAT */
uint32_t types;
} _pack m3dhdr_t;
typedef struct {
char magic[4];
uint32_t length;
} _pack m3dchunk_t;
#ifdef _MSC_VER
#pragma pack(pop)
#endif
/*** in-memory model structure ***/
/* textmap entry */
typedef struct {
M3D_FLOAT u;
M3D_FLOAT v;
} m3dti_t;
#define m3d_textureindex_t m3dti_t
/* texture */
typedef struct {
char *name; /* texture name */
uint8_t *d; /* pixels data */
uint16_t w; /* width */
uint16_t h; /* height */
uint8_t f; /* format, 1 = grayscale, 2 = grayscale+alpha, 3 = rgb, 4 = rgba */
} m3dtx_t;
#define m3d_texturedata_t m3dtx_t
typedef struct {
M3D_INDEX vertexid;
M3D_FLOAT weight;
} m3dw_t;
#define m3d_weight_t m3dw_t
/* bone entry */
typedef struct {
M3D_INDEX parent; /* parent bone index */
char *name; /* name for this bone */
M3D_INDEX pos; /* vertex index position */
M3D_INDEX ori; /* vertex index orientation (quaternion) */
M3D_INDEX numweight; /* number of controlled vertices */
m3dw_t *weight; /* weights for those vertices */
M3D_FLOAT mat4[16]; /* transformation matrix */
} m3db_t;
#define m3d_bone_t m3db_t
/* skin: bone per vertex entry */
typedef struct {
M3D_INDEX boneid[M3D_NUMBONE];
M3D_FLOAT weight[M3D_NUMBONE];
} m3ds_t;
#define m3d_skin_t m3ds_t
/* vertex entry */
typedef struct {
M3D_FLOAT x; /* 3D coordinates and weight */
M3D_FLOAT y;
M3D_FLOAT z;
M3D_FLOAT w;
uint32_t color; /* default vertex color */
M3D_INDEX skinid; /* skin index */
#ifdef M3D_VERTEXTYPE
uint8_t type;
#endif
} m3dv_t;
#define m3d_vertex_t m3dv_t
/* material property formats */
enum {
m3dpf_color,
m3dpf_uint8,
m3dpf_uint16,
m3dpf_uint32,
m3dpf_float,
m3dpf_map
};
typedef struct {
uint8_t format;
uint8_t id;
#ifdef M3D_ASCII
#define M3D_PROPERTYDEF(f,i,n) { (f), (i), (char*)(n) }
char *key;
#else
#define M3D_PROPERTYDEF(f,i,n) { (f), (i) }
#endif
} m3dpd_t;
/* material property types */
/* You shouldn't change the first 8 display and first 4 physical property. Assign the rest as you like. */
enum {
m3dp_Kd = 0, /* scalar display properties */
m3dp_Ka,
m3dp_Ks,
m3dp_Ns,
m3dp_Ke,
m3dp_Tf,
m3dp_Km,
m3dp_d,
m3dp_il,
m3dp_Pr = 64, /* scalar physical properties */
m3dp_Pm,
m3dp_Ps,
m3dp_Ni,
m3dp_Nt,
m3dp_map_Kd = 128, /* textured display map properties */
m3dp_map_Ka,
m3dp_map_Ks,
m3dp_map_Ns,
m3dp_map_Ke,
m3dp_map_Tf,
m3dp_map_Km, /* bump map */
m3dp_map_D,
m3dp_map_N, /* normal map */
m3dp_map_Pr = 192, /* textured physical map properties */
m3dp_map_Pm,
m3dp_map_Ps,
m3dp_map_Ni,
m3dp_map_Nt
};
enum { /* aliases */
m3dp_bump = m3dp_map_Km,
m3dp_map_il = m3dp_map_N,
m3dp_refl = m3dp_map_Pm
};
/* material property */
typedef struct {
uint8_t type; /* property type, see "m3dp_*" enumeration */
union {
uint32_t color; /* if value is a color, m3dpf_color */
uint32_t num; /* if value is a number, m3dpf_uint8, m3pf_uint16, m3dpf_uint32 */
float fnum; /* if value is a floating point number, m3dpf_float */
M3D_INDEX textureid; /* if value is a texture, m3dpf_map */
} value;
} m3dp_t;
#define m3d_property_t m3dp_t
/* material entry */
typedef struct {
char *name; /* name of the material */
uint8_t numprop; /* number of properties */
m3dp_t *prop; /* properties array */
} m3dm_t;
#define m3d_material_t m3dm_t
/* face entry */
typedef struct {
M3D_INDEX materialid; /* material index */
M3D_INDEX vertex[3]; /* 3D points of the triangle in CCW order */
M3D_INDEX normal[3]; /* normal vectors */
M3D_INDEX texcoord[3]; /* UV coordinates */
#ifdef M3D_VERTEXMAX
M3D_INDEX paramid; /* parameter index */
M3D_INDEX vertmax[3]; /* maximum 3D points of the triangle in CCW order */
#endif
} m3df_t;
#define m3d_face_t m3df_t
typedef struct {
uint16_t count;
char *name;
} m3dvi_t;
#define m3d_voxelitem_t m3dvi_t
#define m3d_parameter_t m3dvi_t
/* voxel types (voxel palette) */
typedef struct {
char *name; /* technical name of the voxel */
uint8_t rotation; /* rotation info */
uint16_t voxshape; /* voxel shape */
M3D_INDEX materialid; /* material index */
uint32_t color; /* default voxel color */
M3D_INDEX skinid; /* skin index */
uint8_t numitem; /* number of sub-voxels */
m3dvi_t *item; /* list of sub-voxels */
} m3dvt_t;
#define m3d_voxeltype_t m3dvt_t
/* voxel data blocks */
typedef struct {
char *name; /* name of the block */
int32_t x, y, z; /* position */
uint32_t w, h, d; /* dimension */
uint8_t uncertain; /* probability */
uint8_t groupid; /* block group id */
M3D_VOXEL *data; /* voxel data, indices to voxel type */
} m3dvx_t;
#define m3d_voxel_t m3dvx_t
/* shape command types. must match the row in m3d_commandtypes */
enum {
/* special commands */
m3dc_use = 0, /* use material */
m3dc_inc, /* include another shape */
m3dc_mesh, /* include part of polygon mesh */
/* approximations */
m3dc_div, /* subdivision by constant resolution for both u, v */
m3dc_sub, /* subdivision by constant, different for u and v */
m3dc_len, /* spacial subdivision by maxlength */
m3dc_dist, /* subdivision by maxdistance and maxangle */
/* modifiers */
m3dc_degu, /* degree for both u, v */
m3dc_deg, /* separate degree for u and v */
m3dc_rangeu, /* range for u */
m3dc_range, /* range for u and v */
m3dc_paru, /* u parameters (knots) */
m3dc_parv, /* v parameters */
m3dc_trim, /* outer trimming curve */
m3dc_hole, /* inner trimming curve */
m3dc_scrv, /* spacial curve */
m3dc_sp, /* special points */
/* helper curves */
m3dc_bez1, /* Bezier 1D */
m3dc_bsp1, /* B-spline 1D */
m3dc_bez2, /* bezier 2D */
m3dc_bsp2, /* B-spline 2D */
/* surfaces */
m3dc_bezun, /* Bezier 3D with control, UV, normal */
m3dc_bezu, /* with control and UV */
m3dc_bezn, /* with control and normal */
m3dc_bez, /* control points only */
m3dc_nurbsun, /* B-spline 3D */
m3dc_nurbsu,
m3dc_nurbsn,
m3dc_nurbs,
m3dc_conn, /* connect surfaces */
/* geometrical */
m3dc_line,
m3dc_polygon,
m3dc_circle,
m3dc_cylinder,
m3dc_shpere,
m3dc_torus,
m3dc_cone,
m3dc_cube
};
/* shape command argument types */
enum {
m3dcp_mi_t = 1, /* material index */
m3dcp_hi_t, /* shape index */
m3dcp_fi_t, /* face index */
m3dcp_ti_t, /* texture map index */
m3dcp_vi_t, /* vertex index */
m3dcp_qi_t, /* vertex index for quaternions */
m3dcp_vc_t, /* coordinate or radius, float scalar */
m3dcp_i1_t, /* int8 scalar */
m3dcp_i2_t, /* int16 scalar */
m3dcp_i4_t, /* int32 scalar */
m3dcp_va_t /* variadic arguments */
};
#define M3D_CMDMAXARG 8 /* if you increase this, add more arguments to the macro below */
typedef struct {
#ifdef M3D_ASCII
#define M3D_CMDDEF(t,n,p,a,b,c,d,e,f,g,h) { (char*)(n), (p), { (a), (b), (c), (d), (e), (f), (g), (h) } }
char *key;
#else
#define M3D_CMDDEF(t,n,p,a,b,c,d,e,f,g,h) { (p), { (a), (b), (c), (d), (e), (f), (g), (h) } }
#endif
uint8_t p;
uint8_t a[M3D_CMDMAXARG];
} m3dcd_t;
/* shape command */
typedef struct {
uint16_t type; /* shape type */
uint32_t *arg; /* arguments array */
} m3dc_t;
#define m3d_shapecommand_t m3dc_t
/* shape entry */
typedef struct {
char *name; /* name of the mathematical shape */
M3D_INDEX group; /* group this shape belongs to or -1 */
uint32_t numcmd; /* number of commands */
m3dc_t *cmd; /* commands array */
} m3dh_t;
#define m3d_shape_t m3dh_t
/* label entry */
typedef struct {
char *name; /* name of the annotation layer or NULL */
char *lang; /* language code or NULL */
char *text; /* the label text */
uint32_t color; /* color */
M3D_INDEX vertexid; /* the vertex the label refers to */
} m3dl_t;
#define m3d_label_t m3dl_t
/* frame transformations / working copy skeleton entry */
typedef struct {
M3D_INDEX boneid; /* selects a node in bone hierarchy */
M3D_INDEX pos; /* vertex index new position */
M3D_INDEX ori; /* vertex index new orientation (quaternion) */
} m3dtr_t;
#define m3d_transform_t m3dtr_t
/* animation frame entry */
typedef struct {
uint32_t msec; /* frame's position on the timeline, timestamp */
M3D_INDEX numtransform; /* number of transformations in this frame */
m3dtr_t *transform; /* transformations */
} m3dfr_t;
#define m3d_frame_t m3dfr_t
/* model action entry */
typedef struct {
char *name; /* name of the action */
uint32_t durationmsec; /* duration in millisec (1/1000 sec) */
M3D_INDEX numframe; /* number of frames in this animation */
m3dfr_t *frame; /* frames array */
} m3da_t;
#define m3d_action_t m3da_t
/* inlined asset */
typedef struct {
char *name; /* asset name (same pointer as in texture[].name) */
uint8_t *data; /* compressed asset data */
uint32_t length; /* compressed data length */
} m3di_t;
#define m3d_inlinedasset_t m3di_t
/*** in-memory model structure ***/
#define M3D_FLG_FREERAW (1<<0)
#define M3D_FLG_FREESTR (1<<1)
#define M3D_FLG_MTLLIB (1<<2)
#define M3D_FLG_GENNORM (1<<3)
typedef struct {
m3dhdr_t *raw; /* pointer to raw data */
char flags; /* internal flags */
signed char errcode; /* returned error code */
char vc_s, vi_s, si_s, ci_s, ti_s, bi_s, nb_s, sk_s, fc_s, hi_s, fi_s, vd_s, vp_s; /* decoded sizes for types */
char *name; /* name of the model, like "Utah teapot" */
char *license; /* usage condition or license, like "MIT", "LGPL" or "BSD-3clause" */
char *author; /* nickname, email, homepage or github URL etc. */
char *desc; /* comments, descriptions. May contain '\n' newline character */
M3D_FLOAT scale; /* the model's bounding cube's size in SI meters */
M3D_INDEX numcmap;
uint32_t *cmap; /* color map */
M3D_INDEX numtmap;
m3dti_t *tmap; /* texture map indices */
M3D_INDEX numtexture;
m3dtx_t *texture; /* uncompressed textures */
M3D_INDEX numbone;
m3db_t *bone; /* bone hierarchy */
M3D_INDEX numvertex;
m3dv_t *vertex; /* vertex data */
M3D_INDEX numskin;
m3ds_t *skin; /* skin data */
M3D_INDEX nummaterial;
m3dm_t *material; /* material list */
#ifdef M3D_VERTEXMAX
M3D_INDEX numparam;
m3dvi_t *param; /* parameters and their values list */
#endif
M3D_INDEX numface;
m3df_t *face; /* model face, polygon (triangle) mesh */
M3D_INDEX numvoxtype;
m3dvt_t *voxtype; /* model face, voxel types */
M3D_INDEX numvoxel;
m3dvx_t *voxel; /* model face, cubes compressed into voxels */
M3D_INDEX numshape;
m3dh_t *shape; /* model face, shape commands */
M3D_INDEX numlabel;
m3dl_t *label; /* annotation labels */
M3D_INDEX numaction;
m3da_t *action; /* action animations */
M3D_INDEX numinlined;
m3di_t *inlined; /* inlined assets */
M3D_INDEX numextra;
m3dchunk_t **extra; /* unknown chunks, application / engine specific data probably */
m3di_t preview; /* preview chunk */
} m3d_t;
/*** export parameters ***/
#define M3D_EXP_INT8 0
#define M3D_EXP_INT16 1
#define M3D_EXP_FLOAT 2
#define M3D_EXP_DOUBLE 3
#define M3D_EXP_NOCMAP (1<<0)
#define M3D_EXP_NOMATERIAL (1<<1)
#define M3D_EXP_NOFACE (1<<2)
#define M3D_EXP_NONORMAL (1<<3)
#define M3D_EXP_NOTXTCRD (1<<4)
#define M3D_EXP_FLIPTXTCRD (1<<5)
#define M3D_EXP_NORECALC (1<<6)
#define M3D_EXP_IDOSUCK (1<<7)
#define M3D_EXP_NOBONE (1<<8)
#define M3D_EXP_NOACTION (1<<9)
#define M3D_EXP_INLINE (1<<10)
#define M3D_EXP_EXTRA (1<<11)
#define M3D_EXP_NOZLIB (1<<14)
#define M3D_EXP_ASCII (1<<15)
#define M3D_EXP_NOVRTMAX (1<<16)
/*** error codes ***/
#define M3D_SUCCESS 0
#define M3D_ERR_ALLOC -1
#define M3D_ERR_BADFILE -2
#define M3D_ERR_UNIMPL -65
#define M3D_ERR_UNKPROP -66
#define M3D_ERR_UNKMESH -67
#define M3D_ERR_UNKIMG -68
#define M3D_ERR_UNKFRAME -69
#define M3D_ERR_UNKCMD -70
#define M3D_ERR_UNKVOX -71
#define M3D_ERR_TRUNC -72
#define M3D_ERR_CMAP -73
#define M3D_ERR_TMAP -74
#define M3D_ERR_VRTS -75
#define M3D_ERR_BONE -76
#define M3D_ERR_MTRL -77
#define M3D_ERR_SHPE -78
#define M3D_ERR_VOXT -79
#define M3D_ERR_ISFATAL(x) ((x) < 0 && (x) > -65)
/* callbacks */
typedef unsigned char *(*m3dread_t)(char *filename, unsigned int *size); /* read file contents into buffer */
typedef void (*m3dfree_t)(void *buffer); /* free file contents buffer */
typedef int (*m3dtxsc_t)(const char *name, const void *script, uint32_t len, m3dtx_t *output); /* interpret texture script */
typedef int (*m3dprsc_t)(const char *name, const void *script, uint32_t len, m3d_t *model); /* interpret surface script */
#endif /* ifndef M3D_APIVERSION */
/*** C prototypes ***/
/* import / export */
m3d_t *m3d_load(unsigned char *data, m3dread_t readfilecb, m3dfree_t freecb, m3d_t *mtllib);
unsigned char *m3d_save(m3d_t *model, int quality, int flags, unsigned int *size);
void m3d_free(m3d_t *model);
/* generate animation pose skeleton */
m3dtr_t *m3d_frame(m3d_t *model, M3D_INDEX actionid, M3D_INDEX frameid, m3dtr_t *skeleton);
m3db_t *m3d_pose(m3d_t *model, M3D_INDEX actionid, uint32_t msec);
/* private prototypes used by both importer and exporter */
char *_m3d_safestr(char *in, int morelines);
/*** C implementation ***/
#ifdef M3D_IMPLEMENTATION
#if !defined(M3D_NOIMPORTER) || defined(M3D_EXPORTER)
/* material property definitions */
static m3dpd_t m3d_propertytypes[] = {
M3D_PROPERTYDEF(m3dpf_color, m3dp_Kd, "Kd"), /* diffuse color */
M3D_PROPERTYDEF(m3dpf_color, m3dp_Ka, "Ka"), /* ambient color */
M3D_PROPERTYDEF(m3dpf_color, m3dp_Ks, "Ks"), /* specular color */
M3D_PROPERTYDEF(m3dpf_float, m3dp_Ns, "Ns"), /* specular exponent */
M3D_PROPERTYDEF(m3dpf_color, m3dp_Ke, "Ke"), /* emissive (emitting light of this color) */
M3D_PROPERTYDEF(m3dpf_color, m3dp_Tf, "Tf"), /* transmission color */
M3D_PROPERTYDEF(m3dpf_float, m3dp_Km, "Km"), /* bump strength */
M3D_PROPERTYDEF(m3dpf_float, m3dp_d, "d"), /* dissolve (transparency) */
M3D_PROPERTYDEF(m3dpf_uint8, m3dp_il, "il"), /* illumination model (informational, ignored by PBR-shaders) */
M3D_PROPERTYDEF(m3dpf_float, m3dp_Pr, "Pr"), /* roughness */
M3D_PROPERTYDEF(m3dpf_float, m3dp_Pm, "Pm"), /* metallic, also reflection */
M3D_PROPERTYDEF(m3dpf_float, m3dp_Ps, "Ps"), /* sheen */
M3D_PROPERTYDEF(m3dpf_float, m3dp_Ni, "Ni"), /* index of refraction (optical density) */
M3D_PROPERTYDEF(m3dpf_float, m3dp_Nt, "Nt"), /* thickness of face in millimeter, for printing */
/* aliases, note that "map_*" aliases are handled automatically */
M3D_PROPERTYDEF(m3dpf_map, m3dp_map_Km, "bump"),
M3D_PROPERTYDEF(m3dpf_map, m3dp_map_N, "map_N"),/* as normal map has no scalar version, it's counterpart is 'il' */
M3D_PROPERTYDEF(m3dpf_map, m3dp_map_Pm, "refl")
};
/* shape command definitions. if more commands start with the same string, the longer must come first */
static m3dcd_t m3d_commandtypes[] = {
/* technical */
M3D_CMDDEF(m3dc_use, "use", 1, m3dcp_mi_t, 0, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_inc, "inc", 3, m3dcp_hi_t, m3dcp_vi_t, m3dcp_qi_t, m3dcp_vi_t, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_mesh, "mesh", 1, m3dcp_fi_t, m3dcp_fi_t, m3dcp_vi_t, m3dcp_qi_t, m3dcp_vi_t, 0, 0, 0),
/* approximations */
M3D_CMDDEF(m3dc_div, "div", 1, m3dcp_vc_t, 0, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_sub, "sub", 2, m3dcp_vc_t, m3dcp_vc_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_len, "len", 1, m3dcp_vc_t, 0, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_dist, "dist", 2, m3dcp_vc_t, m3dcp_vc_t, 0, 0, 0, 0, 0, 0),
/* modifiers */
M3D_CMDDEF(m3dc_degu, "degu", 1, m3dcp_i1_t, 0, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_deg, "deg", 2, m3dcp_i1_t, m3dcp_i1_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_rangeu, "rangeu", 1, m3dcp_ti_t, 0, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_range, "range", 2, m3dcp_ti_t, m3dcp_ti_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_paru, "paru", 2, m3dcp_va_t, m3dcp_vc_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_parv, "parv", 2, m3dcp_va_t, m3dcp_vc_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_trim, "trim", 3, m3dcp_va_t, m3dcp_ti_t, m3dcp_i2_t, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_hole, "hole", 3, m3dcp_va_t, m3dcp_ti_t, m3dcp_i2_t, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_scrv, "scrv", 3, m3dcp_va_t, m3dcp_ti_t, m3dcp_i2_t, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_sp, "sp", 2, m3dcp_va_t, m3dcp_vi_t, 0, 0, 0, 0, 0, 0),
/* helper curves */
M3D_CMDDEF(m3dc_bez1, "bez1", 2, m3dcp_va_t, m3dcp_vi_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_bsp1, "bsp1", 2, m3dcp_va_t, m3dcp_vi_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_bez2, "bez2", 2, m3dcp_va_t, m3dcp_vi_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_bsp2, "bsp2", 2, m3dcp_va_t, m3dcp_vi_t, 0, 0, 0, 0, 0, 0),
/* surfaces */
M3D_CMDDEF(m3dc_bezun, "bezun", 4, m3dcp_va_t, m3dcp_vi_t, m3dcp_ti_t, m3dcp_vi_t, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_bezu, "bezu", 3, m3dcp_va_t, m3dcp_vi_t, m3dcp_ti_t, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_bezn, "bezn", 3, m3dcp_va_t, m3dcp_vi_t, m3dcp_vi_t, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_bez, "bez", 2, m3dcp_va_t, m3dcp_vi_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_nurbsun, "nurbsun", 4, m3dcp_va_t, m3dcp_vi_t, m3dcp_ti_t, m3dcp_vi_t, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_nurbsu, "nurbsu", 3, m3dcp_va_t, m3dcp_vi_t, m3dcp_ti_t, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_nurbsn, "nurbsn", 3, m3dcp_va_t, m3dcp_vi_t, m3dcp_vi_t, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_nurbs, "nurbs", 2, m3dcp_va_t, m3dcp_vi_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_conn, "conn", 6, m3dcp_i2_t, m3dcp_ti_t, m3dcp_i2_t, m3dcp_i2_t, m3dcp_ti_t, m3dcp_i2_t, 0, 0),
/* geometrical */
M3D_CMDDEF(m3dc_line, "line", 2, m3dcp_va_t, m3dcp_vi_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_polygon, "polygon", 2, m3dcp_va_t, m3dcp_vi_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_circle, "circle", 3, m3dcp_vi_t, m3dcp_qi_t, m3dcp_vc_t, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_cylinder,"cylinder",6, m3dcp_vi_t, m3dcp_qi_t, m3dcp_vc_t, m3dcp_vi_t, m3dcp_qi_t, m3dcp_vc_t, 0, 0),
M3D_CMDDEF(m3dc_shpere, "shpere", 2, m3dcp_vi_t, m3dcp_vc_t, 0, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_torus, "torus", 4, m3dcp_vi_t, m3dcp_qi_t, m3dcp_vc_t, m3dcp_vc_t, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_cone, "cone", 3, m3dcp_vi_t, m3dcp_vi_t, m3dcp_vi_t, 0, 0, 0, 0, 0),
M3D_CMDDEF(m3dc_cube, "cube", 3, m3dcp_vi_t, m3dcp_vi_t, m3dcp_vi_t, 0, 0, 0, 0, 0)
};
#endif
#include <stdlib.h>
#include <string.h>
#if !defined(M3D_NOIMPORTER) && !defined(STBI_INCLUDE_STB_IMAGE_H)
/* PNG decompressor from
stb_image - v2.23 - public domain image loader - http://nothings.org/stb_image.h
*/
static const char *_m3dstbi__g_failure_reason;
enum
{
STBI_default = 0,
STBI_grey = 1,
STBI_grey_alpha = 2,
STBI_rgb = 3,
STBI_rgb_alpha = 4
};
enum
{
STBI__SCAN_load=0,
STBI__SCAN_type,
STBI__SCAN_header
};
typedef unsigned short _m3dstbi_us;
typedef uint16_t _m3dstbi__uint16;
typedef int16_t _m3dstbi__int16;
typedef uint32_t _m3dstbi__uint32;
typedef int32_t _m3dstbi__int32;
typedef struct
{
_m3dstbi__uint32 img_x, img_y;
int img_n, img_out_n;
void *io_user_data;
int read_from_callbacks;
int buflen;
unsigned char buffer_start[128];
unsigned char *img_buffer, *img_buffer_end;
unsigned char *img_buffer_original, *img_buffer_original_end;
} _m3dstbi__context;
typedef struct
{
int bits_per_channel;
int num_channels;
int channel_order;
} _m3dstbi__result_info;
#define STBI_ASSERT(v)
#define STBI_NOTUSED(v) (void)sizeof(v)
#define STBI__BYTECAST(x) ((unsigned char) ((x) & 255))
#define STBI_MALLOC(sz) M3D_MALLOC(sz)
#define STBI_REALLOC(p,newsz) M3D_REALLOC(p,newsz)
#define STBI_FREE(p) M3D_FREE(p)
#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz)
_inline static unsigned char _m3dstbi__get8(_m3dstbi__context *s)
{
if (s->img_buffer < s->img_buffer_end)
return *s->img_buffer++;
return 0;
}
_inline static int _m3dstbi__at_eof(_m3dstbi__context *s)
{
return s->img_buffer >= s->img_buffer_end;
}
static void _m3dstbi__skip(_m3dstbi__context *s, int n)
{
if (n < 0) {
s->img_buffer = s->img_buffer_end;
return;
}
s->img_buffer += n;
}
static int _m3dstbi__getn(_m3dstbi__context *s, unsigned char *buffer, int n)
{
if (s->img_buffer+n <= s->img_buffer_end) {
memcpy(buffer, s->img_buffer, n);
s->img_buffer += n;
return 1;
} else
return 0;
}
static int _m3dstbi__get16be(_m3dstbi__context *s)
{
int z = _m3dstbi__get8(s);
return (z << 8) + _m3dstbi__get8(s);
}
static _m3dstbi__uint32 _m3dstbi__get32be(_m3dstbi__context *s)
{
_m3dstbi__uint32 z = _m3dstbi__get16be(s);
return (z << 16) + _m3dstbi__get16be(s);
}
#define _m3dstbi__err(x,y) _m3dstbi__errstr(y)
static int _m3dstbi__errstr(const char *str)
{
_m3dstbi__g_failure_reason = str;
return 0;
}
_inline static void *_m3dstbi__malloc(size_t size)
{
return STBI_MALLOC(size);
}
static int _m3dstbi__addsizes_valid(int a, int b)
{
if (b < 0) return 0;
return a <= 2147483647 - b;
}
static int _m3dstbi__mul2sizes_valid(int a, int b)
{
if (a < 0 || b < 0) return 0;
if (b == 0) return 1;
return a <= 2147483647/b;
}
static int _m3dstbi__mad2sizes_valid(int a, int b, int add)
{
return _m3dstbi__mul2sizes_valid(a, b) && _m3dstbi__addsizes_valid(a*b, add);
}
static int _m3dstbi__mad3sizes_valid(int a, int b, int c, int add)
{
return _m3dstbi__mul2sizes_valid(a, b) && _m3dstbi__mul2sizes_valid(a*b, c) &&
_m3dstbi__addsizes_valid(a*b*c, add);
}
static void *_m3dstbi__malloc_mad2(int a, int b, int add)
{
if (!_m3dstbi__mad2sizes_valid(a, b, add)) return NULL;
return _m3dstbi__malloc(a*b + add);
}
static void *_m3dstbi__malloc_mad3(int a, int b, int c, int add)
{
if (!_m3dstbi__mad3sizes_valid(a, b, c, add)) return NULL;
return _m3dstbi__malloc(a*b*c + add);
}
static unsigned char _m3dstbi__compute_y(int r, int g, int b)
{
return (unsigned char) (((r*77) + (g*150) + (29*b)) >> 8);
}
static unsigned char *_m3dstbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y)
{
int i,j;
unsigned char *good;
if (req_comp == img_n) return data;
STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
good = (unsigned char *) _m3dstbi__malloc_mad3(req_comp, x, y, 0);
if (good == NULL) {
STBI_FREE(data);
_m3dstbi__err("outofmem", "Out of memory");
return NULL;
}
for (j=0; j < (int) y; ++j) {
unsigned char *src = data + j * x * img_n ;
unsigned char *dest = good + j * x * req_comp;
#define STBI__COMBO(a,b) ((a)*8+(b))
#define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
switch (STBI__COMBO(img_n, req_comp)) {
STBI__CASE(1,2) { dest[0]=src[0], dest[1]=255; } break;
STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0], dest[3]=255; } break;
STBI__CASE(2,1) { dest[0]=src[0]; } break;
STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0], dest[3]=src[1]; } break;
STBI__CASE(3,4) { dest[0]=src[0],dest[1]=src[1],dest[2]=src[2],dest[3]=255; } break;
STBI__CASE(3,1) { dest[0]=_m3dstbi__compute_y(src[0],src[1],src[2]); } break;
STBI__CASE(3,2) { dest[0]=_m3dstbi__compute_y(src[0],src[1],src[2]), dest[1] = 255; } break;
STBI__CASE(4,1) { dest[0]=_m3dstbi__compute_y(src[0],src[1],src[2]); } break;
STBI__CASE(4,2) { dest[0]=_m3dstbi__compute_y(src[0],src[1],src[2]), dest[1] = src[3]; } break;
STBI__CASE(4,3) { dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; } break;
default: STBI_ASSERT(0);
}
#undef STBI__CASE
}
STBI_FREE(data);
return good;
}
static _m3dstbi__uint16 _m3dstbi__compute_y_16(int r, int g, int b)
{
return (_m3dstbi__uint16) (((r*77) + (g*150) + (29*b)) >> 8);
}
static _m3dstbi__uint16 *_m3dstbi__convert_format16(_m3dstbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y)
{
int i,j;
_m3dstbi__uint16 *good;
if (req_comp == img_n) return data;
STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
good = (_m3dstbi__uint16 *) _m3dstbi__malloc(req_comp * x * y * 2);
if (good == NULL) {
STBI_FREE(data);
_m3dstbi__err("outofmem", "Out of memory");
return NULL;
}
for (j=0; j < (int) y; ++j) {
_m3dstbi__uint16 *src = data + j * x * img_n ;
_m3dstbi__uint16 *dest = good + j * x * req_comp;
#define STBI__COMBO(a,b) ((a)*8+(b))
#define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
switch (STBI__COMBO(img_n, req_comp)) {
STBI__CASE(1,2) { dest[0]=src[0], dest[1]=0xffff; } break;
STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0], dest[3]=0xffff; } break;
STBI__CASE(2,1) { dest[0]=src[0]; } break;
STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0], dest[3]=src[1]; } break;
STBI__CASE(3,4) { dest[0]=src[0],dest[1]=src[1],dest[2]=src[2],dest[3]=0xffff; } break;
STBI__CASE(3,1) { dest[0]=_m3dstbi__compute_y_16(src[0],src[1],src[2]); } break;
STBI__CASE(3,2) { dest[0]=_m3dstbi__compute_y_16(src[0],src[1],src[2]), dest[1] = 0xffff; } break;
STBI__CASE(4,1) { dest[0]=_m3dstbi__compute_y_16(src[0],src[1],src[2]); } break;
STBI__CASE(4,2) { dest[0]=_m3dstbi__compute_y_16(src[0],src[1],src[2]), dest[1] = src[3]; } break;
STBI__CASE(4,3) { dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; } break;
default: STBI_ASSERT(0);
}
#undef STBI__CASE
}
STBI_FREE(data);
return good;
}
#define STBI__ZFAST_BITS 9
#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1)
typedef struct
{
_m3dstbi__uint16 fast[1 << STBI__ZFAST_BITS];
_m3dstbi__uint16 firstcode[16];
int maxcode[17];
_m3dstbi__uint16 firstsymbol[16];
unsigned char size[288];
_m3dstbi__uint16 value[288];
} _m3dstbi__zhuffman;
_inline static int _m3dstbi__bitreverse16(int n)
{
n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1);
n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2);
n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4);
n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8);
return n;
}
_inline static int _m3dstbi__bit_reverse(int v, int bits)
{
STBI_ASSERT(bits <= 16);
return _m3dstbi__bitreverse16(v) >> (16-bits);
}
static int _m3dstbi__zbuild_huffman(_m3dstbi__zhuffman *z, unsigned char *sizelist, int num)
{
int i,k=0;
int code, next_code[16], sizes[17];
memset(sizes, 0, sizeof(sizes));
memset(z->fast, 0, sizeof(z->fast));
for (i=0; i < num; ++i)
++sizes[sizelist[i]];
sizes[0] = 0;
for (i=1; i < 16; ++i)
if (sizes[i] > (1 << i))
return _m3dstbi__err("bad sizes", "Corrupt PNG");
code = 0;
for (i=1; i < 16; ++i) {
next_code[i] = code;
z->firstcode[i] = (_m3dstbi__uint16) code;
z->firstsymbol[i] = (_m3dstbi__uint16) k;
code = (code + sizes[i]);
if (sizes[i])
if (code-1 >= (1 << i)) return _m3dstbi__err("bad codelengths","Corrupt PNG");
z->maxcode[i] = code << (16-i);
code <<= 1;
k += sizes[i];
}
z->maxcode[16] = 0x10000;
for (i=0; i < num; ++i) {
int s = sizelist[i];
if (s) {
int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
_m3dstbi__uint16 fastv = (_m3dstbi__uint16) ((s << 9) | i);
z->size [c] = (unsigned char ) s;
z->value[c] = (_m3dstbi__uint16) i;
if (s <= STBI__ZFAST_BITS) {
int j = _m3dstbi__bit_reverse(next_code[s],s);
while (j < (1 << STBI__ZFAST_BITS)) {
z->fast[j] = fastv;
j += (1 << s);
}
}
++next_code[s];
}
}
return 1;
}
typedef struct
{