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half-edge
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Save texture coordinates as well

This commit is contained in:
hasufell 2014-05-17 02:52:00 +02:00
parent a451979501
commit bf7b86845e
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GPG Key ID: 220CD1C5BDEED020
3 changed files with 117 additions and 53 deletions
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15
src/half_edge.h
View File

@ -85,9 +85,8 @@
typedef double** VERTICES;
typedef uint32_t** FACES;
typedef struct FACES FACES;
typedef double** V_TEXTURES;
typedef struct HE_edge HE_edge;
typedef struct HE_vert HE_vert;
typedef struct HE_face HE_face;
@ -95,6 +94,12 @@ typedef struct HE_obj HE_obj;
typedef struct color color;
struct FACES {
uint32_t **v;
uint32_t **vt;
};
/**
* Represents a half-edge.
*/
@ -217,9 +222,9 @@ struct HE_obj {
* Color.
*/
struct color {
float red;
float green;
float blue;
double red;
double green;
double blue;
};

147
src/half_edge_AS.c
View File

@ -36,14 +36,17 @@
static bool assemble_obj_arrays(char const * const obj_string,
VERTICES *obj_v_out,
FACES *obj_f_out,
V_TEXTURES *obj_vt_out,
FACES **obj_f_out,
uint32_t *vc_out,
uint32_t *fc_out,
uint32_t *ec_out);
uint32_t *ec_out,
uint32_t *vtc_out);
static void assemble_HE_stage1(VERTICES obj_v,
HE_vert *vertices,
uint32_t *vc);
static void assemble_HE_stage2(FACES obj_f,
uint32_t *vc,
uint32_t *fc);
static void assemble_HE_stage2(FACES *obj_f,
HE_vert *vertices,
HE_face *faces,
HE_edge *edges,
@ -70,20 +73,30 @@ static void assemble_HE_stage3(HE_edge *edges,
*/
static bool assemble_obj_arrays(char const * const obj_string,
VERTICES *obj_v_out,
FACES *obj_f_out,
V_TEXTURES *obj_vt_out,
FACES **obj_f_out,
uint32_t *vc_out,
uint32_t *fc_out,
uint32_t *ec_out)
uint32_t *ec_out,
uint32_t *vtc_out)
{
uint32_t vc = 0,
fc = 0,
ec = 0;
char *string,
*str_ptr_space = NULL, /* for strtok */
*str_ptr_newline = NULL, /* for strtok */
*str_tmp_ptr = NULL; /* for strtok */
ec = 0,
vtc = 0;
char *string;
/* for strtok_r */
char *str_ptr_space = NULL,
*str_ptr_newline = NULL,
*str_ptr_slash = NULL,
*str_tmp_ptr = NULL;
VERTICES obj_v = NULL;
FACES obj_f = NULL;
FACES *obj_f = malloc(sizeof(*obj_f));
uint32_t **obj_f_v = NULL;
uint32_t **obj_f_vt = NULL;
V_TEXTURES obj_vt = NULL;
if (!obj_string || !obj_v_out || !obj_f_out)
return false;
@ -123,25 +136,67 @@ static bool assemble_obj_arrays(char const * const obj_string,
obj_v[vc] = NULL; /* trailing NULL pointer */
/*
* FACES
* VERTEX TEXTURES
*/
} else if (!strcmp(str_tmp_ptr, "f")) {
} else if (!strcmp(str_tmp_ptr, "vt")) {
char *myint = NULL;
uint8_t i = 0;
REALLOC(obj_f, sizeof(*obj_f) * (fc + 2));
obj_f[fc] = NULL;
REALLOC(obj_vt, sizeof(*obj_vt) * (vtc + 2));
obj_vt[vtc] = NULL;
while ((myint = strtok_r(NULL, " ", &str_ptr_space))) {
i++;
REALLOC(obj_vt[vtc],
sizeof(**obj_vt) * (i + 1));
obj_vt[vtc][i - 1] = atof(myint);
if (i > 3)
ABORT("Malformed vertice texture exceeds 3 dimensions!\n");
}
vtc++;
obj_vt[vtc] = NULL; /* trailing NULL pointer */
/*
* FACES
*/
} else if (!strcmp(str_tmp_ptr, "f")) {
char *myint_v = NULL,
*myint_vt = NULL;
uint8_t i = 0;
REALLOC(obj_f_v, sizeof(*obj_f_v) * (fc + 2));
obj_f_v[fc] = NULL;
/* deallocate if we don't have vertex textures */
REALLOC(obj_f_vt, sizeof(*obj_f_vt) * (fc + 2));
obj_f_vt[fc] = NULL;
while ((myint_v = strtok_r(NULL, " ", &str_ptr_space))) {
/* is there a slash? */
if ((myint_vt = strtok_r(myint_v, "/", &str_ptr_slash)))
myint_v = myint_vt;
i++;
ec++;
REALLOC(obj_f[fc],
sizeof(**obj_f) * (i + 1));
obj_f[fc][i - 1] = atoi(myint);
obj_f[fc][i] = 0; /* so we can iterate over it more easily */
REALLOC(obj_f_v[fc],
sizeof(**obj_f_v) * (i + 1));
obj_f_v[fc][i - 1] = atoi(myint_v);
/* so we can iterate over it more easily */
obj_f_v[fc][i] = 0;
/* parse x from "0.3/x" */
if ((myint_vt = strtok_r(NULL, "/", &str_ptr_slash))) {
REALLOC(obj_f_vt[fc],
sizeof(**obj_f_vt) * (i + 1));
obj_f_vt[fc][i - 1] = atoi(myint_vt);
/* so we can iterate over it more easily */
obj_f_vt[fc][i] = 0;
}
}
fc++;
obj_f[fc] = NULL; /* trailing NULL pointer */
obj_f_v[fc] = NULL; /* trailing NULL pointer */
}
str_tmp_ptr = strtok_r(NULL, "\n", &str_ptr_newline);
@ -150,10 +205,14 @@ static bool assemble_obj_arrays(char const * const obj_string,
free(string);
*obj_v_out = obj_v;
*obj_vt_out = obj_vt;
obj_f->v = obj_f_v;
obj_f->vt = obj_f_vt;
*obj_f_out = obj_f;
*vc_out = vc;
*fc_out = fc;
*ec_out = ec;
*vtc_out = vtc;
return true;
}
@ -173,12 +232,13 @@ static bool assemble_obj_arrays(char const * const obj_string,
*/
static void assemble_HE_stage1(VERTICES obj_v,
HE_vert *vertices,
uint32_t *vc)
uint32_t *vc,
uint32_t *fc)
{
uint8_t const xpos = 0;
uint8_t const ypos = 1;
uint8_t const zpos = 2;
int8_t const default_col = -1;
int8_t default_color = -1;
*vc = 0;
@ -200,11 +260,10 @@ static void assemble_HE_stage1(VERTICES obj_v,
vertices[*vc].eac = 0;
vertices[*vc].dc = 0;
/* allocate color struct and set preliminary colors */
vertices[*vc].col = malloc(sizeof(color));
vertices[*vc].col->red = default_col;
vertices[*vc].col->green = default_col;
vertices[*vc].col->blue = default_col;
vertices[*vc].col->red = default_color;
vertices[*vc].col->green = default_color;
vertices[*vc].col->blue = default_color;
(*vc)++;
}
@ -226,7 +285,7 @@ static void assemble_HE_stage1(VERTICES obj_v,
* @param fc the count of half-edge faces
* @param ec the count of half-edge edges
*/
static void assemble_HE_stage2(FACES obj_f,
static void assemble_HE_stage2(FACES *obj_f,
HE_vert *vertices,
HE_face *faces,
HE_edge *edges,
@ -238,9 +297,9 @@ static void assemble_HE_stage2(FACES obj_f,
for (uint32_t i = 0; i < (uint32_t)(*fc); i++) { /* for all faces */
uint32_t j = 0;
/* for all vertices of the face */
while (obj_f[i][j]) {
while (obj_f->v[i][j]) {
uint32_t fv_arr_id =
obj_f[i][j] - 1; /* fv_id starts at 1 */
obj_f->v[i][j] - 1; /* fv_id starts at 1 */
edges[*ec].vert = &(vertices[fv_arr_id]);
edges[*ec].face = &(faces[i]);
@ -264,7 +323,7 @@ static void assemble_HE_stage2(FACES obj_f,
edges[*ec].vert->edge_array[*eac] = &(edges[*ec - 1]);
(*eac)++;
if (!obj_f[i][j + 1]) { /* no vertice left */
if (!obj_f->v[i][j + 1]) { /* no vertice left */
uint32_t *eac;
/* connect last edge to first edge */
edges[*ec].next = &(edges[*ec - j]);
@ -369,16 +428,17 @@ HE_obj *parse_obj(char const * const obj_string)
uint32_t vc = 0, /* vertices count */
fc = 0, /* face count */
ec = 0, /* edge count */
dec = 0; /* dummy edge count */
dec = 0, /* dummy edge count */
vtc = 0;
char *string = NULL,
*str_ptr;
HE_vert *vertices = NULL;
HE_edge *edges = NULL;
HE_face *faces = NULL;
HE_obj *obj = NULL;
FACES obj_f = NULL;
/* V_TEXTURES obj_vt = NULL; */
FACES *obj_f = NULL;
VERTICES obj_v = NULL;
V_TEXTURES obj_vt = NULL;
if (!obj_string || !*obj_string)
return NULL;
@ -387,15 +447,10 @@ HE_obj *parse_obj(char const * const obj_string)
strcpy(string, obj_string);
str_ptr = string;
if (!assemble_obj_arrays(string, &obj_v, &obj_f, &vc, &fc, &ec))
if (!assemble_obj_arrays(string, &obj_v, &obj_vt, &obj_f,
&vc, &fc, &ec, &vtc))
return NULL;
/* if ((ec = get_edge_count(obj_f)) == -1) */
/* ABORT("Invalid edge count!\n"); */
/* if ((fc = get_face_count(obj_f)) == -1) */
/* ABORT("Invalid face count!\n"); */
vertices = malloc(sizeof(HE_vert) *
(vc + 1));
CHECK_PTR_VAL(vertices);
@ -405,7 +460,7 @@ HE_obj *parse_obj(char const * const obj_string)
edges = (HE_edge*) malloc(sizeof(HE_edge) * ec * 2);
CHECK_PTR_VAL(edges);
assemble_HE_stage1(obj_v, vertices, &vc);
assemble_HE_stage1(obj_v, vertices, &vc, &fc);
assemble_HE_stage2(obj_f, vertices, faces, edges, &fc, &ec);
assemble_HE_stage3(edges, &ec, &dec);
@ -419,8 +474,12 @@ HE_obj *parse_obj(char const * const obj_string)
obj->fc = fc;
/* cleanup */
for (uint32_t i = 0; i < (uint32_t)fc; i++)
free(obj_f[i]);
for (uint32_t i = 0; i < (uint32_t)fc; i++) {
free(obj_f->v[i]);
free(obj_f->vt[i]);
}
free(obj_f->v);
free(obj_f->vt);
free(obj_f);
for (uint32_t i = 0; i < (uint32_t)vc; i++) {
free(vertices[i].dummys);

8
src/print.c
View File

@ -96,17 +96,17 @@ void print_faces(HE_obj *obj)
* @param faces the plain faces
* @param fc the count of faces
*/
void print_plain_faces(FACES faces, uint32_t fc)
void print_plain_faces(FACES *faces, uint32_t fc)
{
if (!faces || !fc)
if (!faces || !faces->v || !fc)
return;
printf("plain faces:\n");
for (uint32_t i = 0; i < fc - 1; i++) {
uint32_t j = 0;
printf("f:");
while (faces[i][j]) {
printf(" %u", faces[i][j]);
while (faces->v[i][j]) {
printf(" %u", faces->v[i][j]);
j++;
}
printf("\n");