organicmaps/fast_obj
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Basic texture map information now read

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This commit is contained in:
Richard Knight 2019-05-19 17:38:33 +01:00
parent 3fe5161190
commit 023905f0ba
1 changed files with 180 additions and 6 deletions
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186
fast_obj.h
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@ -27,6 +27,15 @@
#ifndef FAST_OBJ_HDR
#define FAST_OBJ_HDR
typedef struct
{
/* Path to texture */
const char* name;
} fastObjTexture;
typedef struct
{
/* Material name */
@ -41,6 +50,21 @@ typedef struct
float Ns; /* Shininess */
float Ni; /* Index of refraction */
float Tr; /* Transparency */
float Tf[3]; /* Transmission filter */
float d; /* Disolve (usually 1 - Tr) */
int illum; /* Illumination model */
/* Texture maps */
fastObjTexture map_Ka;
fastObjTexture map_Kd;
fastObjTexture map_Ks;
fastObjTexture map_Ke;
fastObjTexture map_Kt;
fastObjTexture map_Ns;
fastObjTexture map_Ni;
fastObjTexture map_d;
fastObjTexture map_bump;
} fastObjMaterial;
@ -673,6 +697,17 @@ const char* parse_group(fastObjData* data, const char* ptr)
}
static
fastObjTexture map_default(void)
{
fastObjTexture map;
map.name = 0;
return map;
}
static
fastObjMaterial mtl_default(void)
{
@ -697,7 +732,21 @@ fastObjMaterial mtl_default(void)
mtl.Kt[2] = 0.0;
mtl.Ns = 1.0;
mtl.Ni = 1.0;
mtl.Tr = 0.0;
mtl.Tf[0] = 1.0;
mtl.Tf[1] = 1.0;
mtl.Tf[2] = 1.0;
mtl.d = 1.0;
mtl.illum = 1;
mtl.map_Ka = map_default();
mtl.map_Kd = map_default();
mtl.map_Ks = map_default();
mtl.map_Ke = map_default();
mtl.map_Kt = map_default();
mtl.map_Ns = map_default();
mtl.map_Ni = map_default();
mtl.map_d = map_default();
mtl.map_bump = map_default();
return mtl;
}
@ -747,13 +796,37 @@ const char* parse_usemtl(fastObjData* data, const char* ptr)
}
static
void map_clean(fastObjTexture* map)
{
memory_dealloc((void*)(map->name));
}
static
void mtl_clean(fastObjMaterial* mtl)
{
map_clean(&mtl->map_Ka);
map_clean(&mtl->map_Kd);
map_clean(&mtl->map_Ks);
map_clean(&mtl->map_Ke);
map_clean(&mtl->map_Kt);
map_clean(&mtl->map_Ns);
map_clean(&mtl->map_Ni);
map_clean(&mtl->map_d);
map_clean(&mtl->map_bump);
memory_dealloc((void*)(mtl->name));
}
static
const char* read_mtl_int(const char* p, int* v)
{
return parse_int(p, v);
}
static
const char* read_mtl_single(const char* p, float* v)
{
@ -772,6 +845,32 @@ const char* read_mtl_triple(const char* p, float v[3])
}
static
const char* read_map(fastObjData* data, const char* ptr, fastObjTexture* map)
{
const char* s;
const char* e;
ptr = skip_whitespace(ptr);
/* Don't support options at present */
if (*ptr == '-')
return ptr;
/* Read name */
s = ptr;
while (!is_whitespace(*ptr) && !is_newline(*ptr))
ptr++;
e = ptr;
map->name = string_concat(data->base, s, e);
return e;
}
static
int read_mtllib(fastObjData* data, void* file)
{
@ -781,6 +880,7 @@ int read_mtllib(fastObjData* data, void* file)
unsigned int l;
const char* p;
const char* e;
int found_d;
fastObjMaterial mtl;
@ -796,6 +896,8 @@ int read_mtllib(fastObjData* data, void* file)
mtl = mtl_default();
found_d = 0;
p = contents;
e = contents + l;
while (p < e)
@ -857,16 +959,88 @@ int read_mtllib(fastObjData* data, void* file)
case 'T':
if (p[1] == 'r')
p = read_mtl_single(p + 2, &mtl.Tr);
{
float Tr;
p = read_mtl_single(p + 2, &Tr);
if (!found_d)
{
/* Ignore Tr if we've already read d */
mtl.d = 1.0f - Tr;
}
}
else if (p[1] == 'f')
p = read_mtl_triple(p + 2, mtl.Tf);
break;
case 'd':
if (is_whitespace(p[1]))
{
float d = 1.0f;;
p = read_mtl_single(p + 1, &d);
if (d >= 0.0f && d <= 1.0f)
mtl.Tr = 1.0f - d;
p = read_mtl_single(p + 1, &mtl.d);
found_d = 1;
}
break;
case 'i':
p++;
if (p[0] == 'l' &&
p[1] == 'l' &&
p[2] == 'u' &&
p[3] == 'm' &&
is_whitespace(p[4]))
{
p = read_mtl_int(p + 4, &mtl.illum);
}
break;
case 'm':
p++;
if (p[0] == 'a' &&
p[1] == 'p' &&
p[2] == '_')
{
p += 3;
if (*p == 'K')
{
p++;
if (is_whitespace(p[1]))
{
if (*p == 'a')
p = read_map(data, p + 1, &mtl.map_Ka);
else if (*p == 'd')
p = read_map(data, p + 1, &mtl.map_Kd);
else if (*p == 's')
p = read_map(data, p + 1, &mtl.map_Ks);
else if (*p == 'e')
p = read_map(data, p + 1, &mtl.map_Ke);
else if (*p == 't')
p = read_map(data, p + 1, &mtl.map_Kt);
}
}
else if (*p == 'N')
{
p++;
if (is_whitespace(p[1]))
{
if (*p == 's')
p = read_map(data, p + 1, &mtl.map_Ns);
else if (*p == 'i')
p = read_map(data, p + 1, &mtl.map_Ni);
}
}
else if (*p == 'd')
{
p++;
if (is_whitespace(*p))
p = read_map(data, p, &mtl.map_d);
}
else if (p[0] == 'b' &&
p[1] == 'u' &&
p[2] == 'm' &&
p[3] == 'p' &&
is_whitespace(p[4]))
{
p = read_map(data, p + 4, &mtl.map_d);
}
}
break;