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Made the M3D SDK C++ wrapper optional

pull/2736/head
bzt 2019-11-01 03:39:36 +01:00
parent 3bf81375da
commit 8ebd48442e
1 changed files with 55 additions and 38 deletions
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93
code/M3D/m3d.h
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@ -1899,26 +1899,7 @@ static char *_m3d_getfloat(char *s, M3D_FLOAT *ret)
return _m3d_findarg(e);
}
#endif
#if !defined(M3D_NODUP) && (defined(M3D_ASCII) || defined(M3D_EXPORTER))
m3ds_t *_m3d_addskin(m3ds_t *skin, uint32_t *numskin, m3ds_t *s, uint32_t *idx)
{
uint32_t i;
M3D_FLOAT w = (M3D_FLOAT)0.0;
for(i = 0; i < M3D_NUMBONE && s->weight[i] > (M3D_FLOAT)0.0; i++)
w += s->weight[i];
if(w != (M3D_FLOAT)1.0 && w != (M3D_FLOAT)0.0)
for(i = 0; i < M3D_NUMBONE && s->weight[i] > (M3D_FLOAT)0.0; i++)
s->weight[i] /= w;
if(skin) {
for(i = 0; i < *numskin; i++)
if(!memcmp(&skin[i], s, sizeof(m3ds_t))) { *idx = i; return skin; }
}
skin = (m3ds_t*)M3D_REALLOC(skin, ((*numskin) + 1) * sizeof(m3ds_t));
memcpy(&skin[*numskin], s, sizeof(m3ds_t));
*idx = *numskin;
(*numskin)++;
return skin;
}
#if !defined(M3D_NODUP) && (!defined(M3D_NONORMALS) || defined(M3D_EXPORTER))
/* add vertex to list, only compare x,y,z */
m3dv_t *_m3d_addnorm(m3dv_t *vrtx, uint32_t *numvrtx, m3dv_t *v, uint32_t *idx)
{
@ -1939,6 +1920,27 @@ m3dv_t *_m3d_addnorm(m3dv_t *vrtx, uint32_t *numvrtx, m3dv_t *v, uint32_t *idx)
(*numvrtx)++;
return vrtx;
}
#endif
#if !defined(M3D_NODUP) && (defined(M3D_ASCII) || defined(M3D_EXPORTER))
m3ds_t *_m3d_addskin(m3ds_t *skin, uint32_t *numskin, m3ds_t *s, uint32_t *idx)
{
uint32_t i;
M3D_FLOAT w = (M3D_FLOAT)0.0;
for(i = 0; i < M3D_NUMBONE && s->weight[i] > (M3D_FLOAT)0.0; i++)
w += s->weight[i];
if(w != (M3D_FLOAT)1.0 && w != (M3D_FLOAT)0.0)
for(i = 0; i < M3D_NUMBONE && s->weight[i] > (M3D_FLOAT)0.0; i++)
s->weight[i] /= w;
if(skin) {
for(i = 0; i < *numskin; i++)
if(!memcmp(&skin[i], s, sizeof(m3ds_t))) { *idx = i; return skin; }
}
skin = (m3ds_t*)M3D_REALLOC(skin, ((*numskin) + 1) * sizeof(m3ds_t));
memcpy(&skin[*numskin], s, sizeof(m3ds_t));
*idx = *numskin;
(*numskin)++;
return skin;
}
/* helper function to create safe strings */
char *_m3d_safestr(char *in, int morelines)
{
@ -2089,19 +2091,6 @@ _inline static unsigned char *_m3d_getidx(unsigned char *data, char type, M3D_IN
return data;
}
/* fast inverse square root calculation. returns 1/sqrt(x) */
static M3D_FLOAT _m3d_rsq(M3D_FLOAT x)
{
#ifdef M3D_DOUBLE
return ((M3D_FLOAT)15.0/(M3D_FLOAT)8.0) + ((M3D_FLOAT)-5.0/(M3D_FLOAT)4.0)*x + ((M3D_FLOAT)3.0/(M3D_FLOAT)8.0)*x*x;
#else
/* John Carmack's */
float x2 = x * 0.5f;
*((uint32_t*)&x) = (0x5f3759df - (*((uint32_t*)&x) >> 1));
return x * (1.5f - (x2 * x * x));
#endif
}
#ifndef M3D_NOANIMATION
/* multiply 4 x 4 matrices. Do not use float *r[16] as argument, because some compilers misinterpret that as
* 16 pointers each pointing to a float, but we need a single pointer to 16 floats. */
@ -2176,6 +2165,20 @@ void _m3d_mat(M3D_FLOAT *r, m3dv_t *p, m3dv_t *q)
r[12] = 0; r[13] = 0; r[14] = 0; r[15] = 1;
}
#endif
#if !defined(M3D_NOANIMATION) || !defined(M3D_NONORMALS)
/* fast inverse square root calculation. returns 1/sqrt(x) */
static M3D_FLOAT _m3d_rsq(M3D_FLOAT x)
{
#ifdef M3D_DOUBLE
return ((M3D_FLOAT)15.0/(M3D_FLOAT)8.0) + ((M3D_FLOAT)-5.0/(M3D_FLOAT)4.0)*x + ((M3D_FLOAT)3.0/(M3D_FLOAT)8.0)*x*x;
#else
/* John Carmack's */
float x2 = x * 0.5f;
*((uint32_t*)&x) = (0x5f3759df - (*((uint32_t*)&x) >> 1));
return x * (1.5f - (x2 * x * x));
#endif
}
#endif
/**
* Function to decode a Model 3D into in-memory format
@ -2183,12 +2186,19 @@ void _m3d_mat(M3D_FLOAT *r, m3dv_t *p, m3dv_t *q)
m3d_t *m3d_load(unsigned char *data, m3dread_t readfilecb, m3dfree_t freecb, m3d_t *mtllib)
{
unsigned char *end, *chunk, *buff, weights[8];
unsigned int i, j, k, n, am, len = 0, reclen, offs, numnorm = 0;
unsigned int i, j, k, n, am, len = 0, reclen, offs;
char *material;
#ifndef M3D_NONORMALS
unsigned int numnorm = 0;
m3dv_t *norm = NULL, *v0, *v1, *v2, va, vb, vn;
M3D_INDEX *ni = NULL, *vi = NULL;
#endif
m3d_t *model;
M3D_INDEX mi, *ni = NULL, *vi = NULL;
M3D_FLOAT w, r[16];
M3D_INDEX mi;
M3D_FLOAT w;
#ifndef M3D_NOANIMATION
M3D_FLOAT r[16];
#endif
m3dtx_t *tx;
m3dm_t *m;
m3da_t *a;
@ -3000,8 +3010,11 @@ memerr: M3D_LOG("Out of memory");
}
}
/* calculate normals, normalize skin weights, create bone/vertex cross-references and calculate transform matrices */
#ifdef M3D_ASCII
postprocess:
#endif
if(model) {
#ifndef M3D_NONORMALS
if(model->numface && model->face) {
memset(&vn, 0, sizeof(m3dv_t));
/* if they are missing, calculate triangle normals into a temporary buffer */
@ -3049,7 +3062,9 @@ postprocess:
M3D_FREE(vi);
}
}
#endif
if(model->numbone && model->bone && model->numskin && model->skin && model->numvertex && model->vertex) {
#ifndef M3D_NOWEIGHTS
for(i = 0; i < model->numvertex; i++) {
if(model->vertex[i].skinid < M3D_INDEXMAX) {
sk = &model->skin[model->vertex[i].skinid];
@ -3067,6 +3082,7 @@ postprocess:
}
}
}
#endif
#ifndef M3D_NOANIMATION
for(i = 0; i < model->numbone; i++) {
b = &model->bone[i];
@ -4317,7 +4333,7 @@ memerr: if(face) M3D_FREE(face);
/* zlib compress */
if(!(flags & M3D_EXP_NOZLIB)) {
z = stbi_zlib_compress((unsigned char *)h, len, (int*)&l, 9);
if(z && l > 0) { len = l; M3D_FREE(h); h = (m3dhdr_t*)z; }
if(z && l > 0 && l < len) { len = l; M3D_FREE(h); h = (m3dhdr_t*)z; }
}
/* add file header at the begining */
len += 8;
@ -4346,7 +4362,7 @@ memerr: if(face) M3D_FREE(face);
#ifdef __cplusplus
}
#ifdef M3D_CPPWRAPPER
#include <vector>
#include <string>
#include <memory>
@ -4538,6 +4554,7 @@ namespace M3D {
#endif /* impl */
}
#endif
#endif /* __cplusplus */