Move bezier stuff to it's own module

src/Makefile

@@ -1,8 +1,8 @@
 include ../common.mk
 
 TARGET = drow-engine
-HEADERS = err.h common.h print.h filereader.h gl_draw.h vector.h half_edge.h
+HEADERS = err.h common.h print.h filereader.h gl_draw.h vector.h half_edge.h bezier.h
-OBJECTS = print.o filereader.o gl_draw.o vector.o half_edge.o half_edge_AS.o
+OBJECTS = print.o filereader.o gl_draw.o vector.o half_edge.o half_edge_AS.o bezier.o
 INCS = -I.
 
 CFLAGS += $(shell $(PKG_CONFIG) --cflags gl glu glib-2.0)

src/bezier.c

@@ -0,0 +1,70 @@
+/*
+ * 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/>.
+ */
+
+/**
+ * @file bezier.c
+ * This file provides operations and informational functions
+ * on the bezier data type which is defined in bezier.h.
+ * @brief operations on bezier curves
+ */
+
+#include "bezier.h"
+#include "vector.h"
+
+#include <stdint.h>
+#include <stdlib.h>
+
+
+/**
+ * Calculate a point on the bezier curve according to the
+ * bezier vertices. If section is set to 0.5 then it will
+ * return the vector to the point in the middle of the curve.
+ *
+ * @param obj the object holding the bezier vertices information
+ * @param section the section which will be applied to all
+ * lines between the bezier vertices
+ * @return the vector to the calculated point
+ */
+vector *calculate_bezier_point(bez_curv *bez, float section)
+{
+	vector vec_arr[bez->deg];
+	bez_curv new_bez;
+
+	for (uint32_t i = 0; i < bez->deg; i++) {
+		vector new_vec;
+
+		SUB_VECTORS(&(bez->vec[i + 1]), &(bez->vec[i]), &new_vec);
+		VECTOR_LEN_SCAL_MUL(&new_vec, section, &new_vec);
+		ADD_VECTORS(&new_vec, &(bez->vec[i]), &new_vec);
+
+		vec_arr[i] = new_vec;
+	}
+
+	new_bez.vec = vec_arr;
+	new_bez.deg = bez->deg - 1;
+
+	if (new_bez.deg > 0) {
+		return calculate_bezier_point(&new_bez, section);
+	} else {
+		vector *result_vector = malloc(sizeof(*result_vector));
+		*result_vector = vec_arr[0];
+		return result_vector;
+	}
+}
+
+

src/bezier.h

@@ -0,0 +1,55 @@
+/*
+ * 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/>.
+ */
+
+/**
+ * @file bezier.h
+ * Header for the external API of bezier.c.
+ * @brief header of bezier.c
+ */
+
+#ifndef _DROW_ENGINE_BEZIER_H
+#define _DROW_ENGINE_BEZIER_H
+
+
+#include "vector.h"
+
+#include <stdint.h>
+
+
+typedef struct bez_curv bez_curv;
+
+
+/**
+ * Bezier Curve.
+ */
+struct bez_curv {
+	/**
+	 * Array of vectors.
+	 */
+	vector *vec;
+	/**
+	 * Degree of the curve.
+	 */
+	uint32_t deg;
+};
+
+
+vector *calculate_bezier_point(bez_curv *bez, float section);
+
+
+#endif /* _DROW_ENGINE_BEZIER_H */

src/gl_draw.c

@@ -24,6 +24,7 @@
  * @brief OpenGL drawing
  */
 
+#include "bezier.h"
 #include "err.h"
 #include "filereader.h"
 #include "gl_draw.h"

src/half_edge.c

@@ -285,43 +285,6 @@ bool normalize_object(HE_obj *obj)
 	return true;
 }
 
-/**
- * Calculate a point on the bezier curve according to the
- * bezier vertices. If section is set to 0.5 then it will
- * return the vector to the point in the middle of the curve.
- *
- * @param obj the object holding the bezier vertices information
- * @param section the section which will be applied to all
- * lines between the bezier vertices
- * @return the vector to the calculated point
- */
-vector *calculate_bezier_point(bez_curv *bez, float section)
-{
-	vector vec_arr[bez->deg];
-	bez_curv new_bez;
-
-	for (uint32_t i = 0; i < bez->deg; i++) {
-		vector new_vec;
-
-		SUB_VECTORS(&(bez->vec[i + 1]), &(bez->vec[i]), &new_vec);
-		VECTOR_LEN_SCAL_MUL(&new_vec, section, &new_vec);
-		ADD_VECTORS(&new_vec, &(bez->vec[i]), &new_vec);
-
-		vec_arr[i] = new_vec;
-	}
-
-	new_bez.vec = vec_arr;
-	new_bez.deg = bez->deg - 1;
-
-	if (new_bez.deg > 0) {
-		return calculate_bezier_point(&new_bez, section);
-	} else {
-		vector *result_vector = malloc(sizeof(*result_vector));
-		*result_vector = vec_arr[0];
-		return result_vector;
-	}
-}
-
 /**
  * Free the inner structures of an object.
  *

src/half_edge.h

@@ -29,6 +29,7 @@
 #define _DROW_ENGINE_HE_OPERATIONS_H
 
 
+#include "bezier.h"
 #include "vector.h"
 
 #include <stdbool.h>
@@ -108,7 +109,6 @@ typedef struct HE_vert_acc HE_vert_acc;
 typedef struct HE_face HE_face;
 typedef struct HE_obj HE_obj;
 typedef struct color color;
-typedef struct bez_curv bez_curv;
 
 
 /**
@@ -303,20 +303,6 @@ struct color {
 	double blue;
 };
 
-/**
- * Bezier Curve.
- */
-struct bez_curv {
-	/**
-	 * Array of vectors.
-	 */
-	vector *vec;
-	/**
-	 * Degree of the curve.
-	 */
-	uint32_t deg;
-};
-
 
 bool face_normal(HE_edge const * const edge,
 		vector *vec);
@@ -324,7 +310,6 @@ bool vec_normal(HE_vert const * const vert, vector *vec);
 bool find_center(HE_obj const * const obj, vector *vec);
 float get_normalized_scale_factor(HE_obj const * const obj);
 bool normalize_object(HE_obj *obj);
-vector *calculate_bezier_point(bez_curv *bez, float section);
 HE_obj *parse_obj(char const * const filename);
 void delete_object(HE_obj *obj);