Add @file/@brief doc, merge parser into half_edge
This commit is contained in:
parent
c5c6c8b89a
commit
7610843935
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@ -15,8 +15,8 @@ CFLAGS += -O0 -g3
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endif
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TARGET = drow-engine
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HEADERS = err.h parser.h common.h print.h filereader.h gl_draw.h vector.h half_edge.h
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OBJECTS = main.o parser.o print.o filereader.o gl_draw.o vector.o half_edge.o
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HEADERS = err.h common.h print.h filereader.h gl_draw.h vector.h half_edge.h
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OBJECTS = main.o print.o filereader.o gl_draw.o vector.o half_edge.o
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INCS = -I.
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CFLAGS += $(shell $(PKG_CONFIG) --cflags gl glu glib-2.0)
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@ -20,7 +20,7 @@
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* @file common.h
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* Header for common types, macros and constants
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* shared amongst the codebase. Error macros go in err.h.
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* @brief common.h common types, macros, constants
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* @brief common types, macros, constants
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*/
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#ifndef _DROW_ENGINE_TYPES_H
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11
src/err.h
11
src/err.h
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@ -16,17 +16,18 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _DROW_ENGINE_ERR_H
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#define _DROW_ENGINE_ERR_H
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#include <stdio.h>
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/**
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* @file err.h
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* Holds error handling macros.
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* @brief error handling
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*/
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#ifndef _DROW_ENGINE_ERR_H
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#define _DROW_ENGINE_ERR_H
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#include <stdio.h>
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/**
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* Abort the program with a given error message.
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*/
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@ -16,9 +16,16 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file filereader.c
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* Reading of arbitrary files into strings as well as
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* reading specific ones via various parsers.
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* @brief reading of different filetypes
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*/
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#include "err.h"
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#include "filereader.h"
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#include "parser.h"
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#include "half_edge.h"
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#include "common.h"
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#include <fcntl.h>
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@ -16,6 +16,12 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file filereader.h
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* Header for the external API of filereader.c
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* @brief header of filereader.c
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*/
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#ifndef _DROW_ENGINE_FILEREADER_H
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#define _DROW_ENGINE_FILEREADER_H
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@ -16,6 +16,14 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file gl_draw.c
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* This file does the actual OpenGL and GLUT logic,
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* drawing the objects, handling keyboard input and
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* various GLUT-related callback functions.
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* @brief OpenGL drawing
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*/
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#include "err.h"
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#include "filereader.h"
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#include "half_edge.h"
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@ -16,6 +16,12 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file gl_draw.h
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* Header for the external API of gl_draw.c
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* @brief header of gl_draw.c
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*/
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#ifndef _DROW_ENGINE_DRAW_H
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#define _DROW_ENGINE_DRAW_H
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164
src/half_edge.c
164
src/half_edge.c
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@ -16,9 +16,22 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file half_edge.c
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* This file provides operations on half-edge data structures
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* which are defined in half_edge.h, as well as assembling
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* such a struct.
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* @brief operations on half-edge data structs
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*/
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#include "err.h"
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#include "filereader.h"
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#include "half_edge.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/**
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@ -31,3 +44,154 @@ HE_edge **get_all_emanating_edges(HE_vert *vertice)
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{
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return NULL;
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}
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/**
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* Parse an .obj string and return a HE_obj
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* that represents the whole object.
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*
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* @param obj_string the whole string from the .obj file
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* @return the HE_face array that represents the object
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*/
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HE_obj *parse_obj(char const * const obj_string)
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{
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uint32_t vc = 0, /* vertices count */
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fc = 0, /* face count */
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ec = 0; /* edge count */
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char *string = malloc(sizeof(char) * strlen(obj_string) + 1),
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*str_ptr_space = NULL, /* for strtok */
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*str_ptr_newline = NULL, /* for strtok */
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*str_tmp_ptr = NULL; /* for strtok */
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HE_vert *vertices = NULL;
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HE_edge *edges = NULL;
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HE_face *faces = NULL;
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HE_obj *obj = NULL;
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FACE face_v = NULL;
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strcpy(string, obj_string);
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str_tmp_ptr = strtok_r(string, "\n", &str_ptr_newline);
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while (str_tmp_ptr && *str_tmp_ptr) {
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str_tmp_ptr = strtok_r(str_tmp_ptr, " ", &str_ptr_space);
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/* parse vertices */
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if (!strcmp(str_tmp_ptr, "v")) {
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char *myfloat = NULL;
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HE_vert *tmp_ptr;
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tmp_ptr = (HE_vert*) realloc(vertices,
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sizeof(HE_vert) * (vc + 1));
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CHECK_PTR_VAL(tmp_ptr);
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vertices = tmp_ptr;
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/* fill x */
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myfloat = strtok_r(NULL, " ", &str_ptr_space);
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CHECK_PTR_VAL(myfloat);
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vertices[vc].x = atof(myfloat);
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/* fill y */
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myfloat = strtok_r(NULL, " ", &str_ptr_space);
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CHECK_PTR_VAL(myfloat);
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vertices[vc].y = atof(myfloat);
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/* fill z */
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myfloat = strtok_r(NULL, " ", &str_ptr_space);
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CHECK_PTR_VAL(myfloat);
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vertices[vc].z = atof(myfloat);
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/* set edge NULL */
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vertices[vc].edge = NULL;
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vc++;
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/* exceeds 3 dimensions, malformed vertice */
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if (strtok_r(NULL, " ", &str_ptr_space))
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return NULL;
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/* parse faces */
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} else if (!strcmp(str_tmp_ptr, "f")) {
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char *myint = NULL;
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uint8_t i = 0;
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FACE tmp_ptr = NULL;
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/* fill FACE */
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tmp_ptr = (FACE) realloc(face_v, sizeof(FACE*) * (fc + 1));
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CHECK_PTR_VAL(tmp_ptr);
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face_v = tmp_ptr;
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face_v[fc] = NULL;
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while ((myint = strtok_r(NULL, " ", &str_ptr_space))) {
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uint32_t *tmp_ptr = NULL;
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i++;
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ec++;
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tmp_ptr = (uint32_t*) realloc(face_v[fc],
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sizeof(FACE**) * (i + 1));
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CHECK_PTR_VAL(tmp_ptr);
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tmp_ptr[i - 1] = (uint32_t) atoi(myint);
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tmp_ptr[i] = 0; /* so we can iterate over it */
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face_v[fc] = tmp_ptr;
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}
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fc++;
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}
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str_tmp_ptr = strtok_r(NULL, "\n", &str_ptr_newline);
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}
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faces = (HE_face*) malloc(sizeof(HE_face) * fc);
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CHECK_PTR_VAL(faces);
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edges = (HE_edge*) malloc(sizeof(HE_edge) * ec);
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CHECK_PTR_VAL(edges);
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ec = 0;
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/* create HE_edges and real HE_faces */
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for (uint32_t i = 0; i < fc; i++) {
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uint32_t j = 0;
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/* for all vertices of the face */
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while (face_v[i][j]) {
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edges[ec].vert = &(vertices[face_v[i][j] - 1]);
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edges[ec].face = &(faces[j]);
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edges[ec].pair = NULL; /* preliminary */
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vertices[face_v[i][j] - 1].edge = &(edges[ec]); /* last one wins */
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if (face_v[i][j + 1]) /* connect to next vertice */
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edges[ec].next = &(edges[ec + 1]);
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else /* no vertices left, connect to first vertice */
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edges[ec].next = &(edges[ec - j]);
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ec++;
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j++;
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}
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faces[i].edge = &(edges[ec - 1]); /* "last" edge */
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}
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/* find pairs */
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/* TODO: acceleration */
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for (uint32_t i = 0; i < ec; i++) {
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HE_vert *next_vert = edges[i].next->vert;
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for (uint32_t j = 0; j < ec; j++)
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if (next_vert == edges[j].vert)
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edges[i].pair = &(edges[j]);
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}
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obj = (HE_obj*) malloc(sizeof(HE_obj));
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CHECK_PTR_VAL(obj);
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obj->vertices = vertices;
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obj->vc = vc;
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obj->edges = edges;
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obj->ec = ec;
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obj->faces = faces;
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obj->fc = fc;
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free(string);
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for (uint32_t i = 0; i < fc; i++)
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free(face_v[i]);
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free(face_v);
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return obj;
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}
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@ -16,6 +16,14 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file half_edge.h
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* Header for the external API of half_edge.c,
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* primarily holding the common half-edge data
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* structures.
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* @brief header of half_edge.c
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*/
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#ifndef _DROW_ENGINE_HE_OPERATIONS_H
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#define _DROW_ENGINE_HE_OPERATIONS_H
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#include <stdint.h>
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/**
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* Typedef for the plain faces
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* that are not yet converted to real HE_face.
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*/
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typedef uint32_t** FACE;
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typedef struct HE_edge HE_edge;
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typedef struct HE_vert HE_vert;
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typedef struct HE_face HE_face;
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@ -110,6 +124,7 @@ struct HE_obj {
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HE_edge **get_all_emanating_edges(HE_vert *vertice);
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HE_obj *parse_obj(char const * const filename);
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#endif /* _DROW_ENGINE_HE_OPERATIONS_H */
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178
src/parser.c
178
src/parser.c
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@ -1,178 +0,0 @@
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/*
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* Copyright 2011-2014 hasufell
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*
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* This file is part of a hasufell project.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation version 2 of the License only.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "err.h"
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#include "filereader.h"
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#include "parser.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/**
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* Parse an .obj string and return a HE_obj
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* that represents the whole object.
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*
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* @param obj_string the whole string from the .obj file
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* @return the HE_face array that represents the object
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*/
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HE_obj *parse_obj(char const * const obj_string)
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{
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uint32_t vc = 0, /* vertices count */
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fc = 0, /* face count */
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ec = 0; /* edge count */
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char *string = malloc(sizeof(char) * strlen(obj_string) + 1),
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*str_ptr_space = NULL, /* for strtok */
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*str_ptr_newline = NULL, /* for strtok */
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*str_tmp_ptr = NULL; /* for strtok */
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HE_vert *vertices = NULL;
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HE_edge *edges = NULL;
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HE_face *faces = NULL;
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HE_obj *obj = NULL;
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FACE face_v = NULL;
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strcpy(string, obj_string);
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str_tmp_ptr = strtok_r(string, "\n", &str_ptr_newline);
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while (str_tmp_ptr && *str_tmp_ptr) {
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str_tmp_ptr = strtok_r(str_tmp_ptr, " ", &str_ptr_space);
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/* parse vertices */
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if (!strcmp(str_tmp_ptr, "v")) {
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char *myfloat = NULL;
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HE_vert *tmp_ptr;
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tmp_ptr = (HE_vert*) realloc(vertices,
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sizeof(HE_vert) * (vc + 1));
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CHECK_PTR_VAL(tmp_ptr);
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vertices = tmp_ptr;
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/* fill x */
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myfloat = strtok_r(NULL, " ", &str_ptr_space);
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CHECK_PTR_VAL(myfloat);
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vertices[vc].x = atof(myfloat);
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/* fill y */
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myfloat = strtok_r(NULL, " ", &str_ptr_space);
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CHECK_PTR_VAL(myfloat);
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vertices[vc].y = atof(myfloat);
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/* fill z */
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myfloat = strtok_r(NULL, " ", &str_ptr_space);
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CHECK_PTR_VAL(myfloat);
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vertices[vc].z = atof(myfloat);
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/* set edge NULL */
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vertices[vc].edge = NULL;
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vc++;
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/* exceeds 3 dimensions, malformed vertice */
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if (strtok_r(NULL, " ", &str_ptr_space))
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return NULL;
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/* parse faces */
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} else if (!strcmp(str_tmp_ptr, "f")) {
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char *myint = NULL;
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uint8_t i = 0;
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FACE tmp_ptr = NULL;
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/* fill FACE */
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tmp_ptr = (FACE) realloc(face_v, sizeof(FACE*) * (fc + 1));
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CHECK_PTR_VAL(tmp_ptr);
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face_v = tmp_ptr;
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face_v[fc] = NULL;
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while ((myint = strtok_r(NULL, " ", &str_ptr_space))) {
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uint32_t *tmp_ptr = NULL;
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i++;
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ec++;
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tmp_ptr = (uint32_t*) realloc(face_v[fc],
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sizeof(FACE**) * (i + 1));
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CHECK_PTR_VAL(tmp_ptr);
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tmp_ptr[i - 1] = (uint32_t) atoi(myint);
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tmp_ptr[i] = 0; /* so we can iterate over it */
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face_v[fc] = tmp_ptr;
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}
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fc++;
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}
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str_tmp_ptr = strtok_r(NULL, "\n", &str_ptr_newline);
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}
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faces = (HE_face*) malloc(sizeof(HE_face) * fc);
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CHECK_PTR_VAL(faces);
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edges = (HE_edge*) malloc(sizeof(HE_edge) * ec);
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CHECK_PTR_VAL(edges);
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ec = 0;
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/* create HE_edges and real HE_faces */
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for (uint32_t i = 0; i < fc; i++) {
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uint32_t j = 0;
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/* for all vertices of the face */
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while (face_v[i][j]) {
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edges[ec].vert = &(vertices[face_v[i][j] - 1]);
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edges[ec].face = &(faces[j]);
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edges[ec].pair = NULL; /* preliminary */
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vertices[face_v[i][j] - 1].edge = &(edges[ec]); /* last one wins */
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if (face_v[i][j + 1]) /* connect to next vertice */
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edges[ec].next = &(edges[ec + 1]);
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else /* no vertices left, connect to first vertice */
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edges[ec].next = &(edges[ec - j]);
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ec++;
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j++;
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}
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faces[i].edge = &(edges[ec - 1]); /* "last" edge */
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}
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/* find pairs */
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/* TODO: acceleration */
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for (uint32_t i = 0; i < ec; i++) {
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HE_vert *next_vert = edges[i].next->vert;
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for (uint32_t j = 0; j < ec; j++)
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if (next_vert == edges[j].vert)
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edges[i].pair = &(edges[j]);
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||||
}
|
||||
|
||||
obj = (HE_obj*) malloc(sizeof(HE_obj));
|
||||
CHECK_PTR_VAL(obj);
|
||||
|
||||
obj->vertices = vertices;
|
||||
obj->vc = vc;
|
||||
obj->edges = edges;
|
||||
obj->ec = ec;
|
||||
obj->faces = faces;
|
||||
obj->fc = fc;
|
||||
|
||||
free(string);
|
||||
for (uint32_t i = 0; i < fc; i++)
|
||||
free(face_v[i]);
|
||||
free(face_v);
|
||||
|
||||
return obj;
|
||||
}
|
||||
36
src/parser.h
36
src/parser.h
|
|
@ -1,36 +0,0 @@
|
|||
/*
|
||||
* Copyright 2011-2014 hasufell
|
||||
*
|
||||
* This file is part of a hasufell project.
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation version 2 of the License only.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#ifndef _DROW_ENGINE_PARSER_H
|
||||
#define _DROW_ENGINE_PARSER_H
|
||||
|
||||
#include "half_edge.h"
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
|
||||
/**
|
||||
* Typedef for the plain faces
|
||||
* that are not yet converted to real HE_face.
|
||||
*/
|
||||
typedef uint32_t** FACE;
|
||||
|
||||
HE_obj *parse_obj(char const * const filename);
|
||||
|
||||
|
||||
#endif /* _DROW_ENGINE_PARSER_H */
|
||||
|
|
@ -16,8 +16,15 @@
|
|||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @file print.c
|
||||
* Various verbose print functions that help
|
||||
* debugging code or provide more detailed
|
||||
* error messages.
|
||||
* @brief various print functions
|
||||
*/
|
||||
|
||||
#include "half_edge.h"
|
||||
#include "parser.h"
|
||||
#include "vector.h"
|
||||
|
||||
#include <stdio.h>
|
||||
|
|
|
|||
|
|
@ -16,12 +16,17 @@
|
|||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @file print.h
|
||||
* Header for the external API of print.c.
|
||||
* @brief header of print.c
|
||||
*/
|
||||
|
||||
#ifndef _DROW_ENGINE_PRINT_H
|
||||
#define _DROW_ENGINE_PRINT_H
|
||||
|
||||
|
||||
#include "half_edge.h"
|
||||
#include "parser.h"
|
||||
#include "vector.h"
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -16,6 +16,13 @@
|
|||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @file vector.c
|
||||
* Various operations on the vector struct defined
|
||||
* in vector.h, including simple maths.
|
||||
* @brief vector operations
|
||||
*/
|
||||
|
||||
#include "err.h"
|
||||
#include "vector.h"
|
||||
|
||||
|
|
|
|||
|
|
@ -16,6 +16,13 @@
|
|||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @file vector.h
|
||||
* Header for the external API of vector.c,
|
||||
* also holding the vector data structure.
|
||||
* @brief header of vector.c
|
||||
*/
|
||||
|
||||
#ifndef _DROW_ENGINE_VEC_MATH_H
|
||||
#define _DROW_ENGINE_VEC_MATH_H
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue