utils: add Fract util function and move math utils to separate unit

src/CMakeLists.txt

@@ -1,5 +1,6 @@
 SET(SRC_LIST
 	utils.c
+	maths.c
 	config.c
 	timeline.c
 	gamestate.c

src/libsuperderpy.h

@@ -48,6 +48,7 @@ struct GamestateResources;
 #include "character.h"
 #include "config.h"
 #include "gamestate.h"
+#include "maths.h"
 #include "shader.h"
 #include "timeline.h"
 #include "tween.h"

src/maths.c

@@ -0,0 +1,58 @@
+/*! \file maths.c
+ *  \brief Math helper functions.
+ */
+/*
+ * Copyright (c) Sebastian Krzyszkowiak <dos@dosowisko.net>
+ *
+ * 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; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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/>.
+ */
+
+#include "maths.h"
+#include "config.h"
+#include "internal.h"
+#include <allegro5/allegro_primitives.h>
+#include <allegro5/allegro_ttf.h>
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+SYMBOL_EXPORT double VectorLength(double x, double y, double z) {
+	return sqrt(pow(x, 2) + pow(y, 2) + pow(z, 2));
+}
+
+SYMBOL_EXPORT double Wrap(double left, double right, double val) {
+	return left + fmod(val - left, right - left);
+}
+
+SYMBOL_EXPORT double Clamp(double left, double right, double val) {
+	if (val > right) {
+		return right;
+	}
+	if (val < left) {
+		return left;
+	}
+	return val;
+}
+
+SYMBOL_EXPORT double Lerp(double left, double right, double pos) {
+	return left + (right - left) * pos;
+}
+
+SYMBOL_EXPORT double Sign(double val) {
+	return val / fabs(val);
+}
+
+SYMBOL_EXPORT double Fract(double val) {
+	return val - floor(val);
+}

src/maths.h

@@ -0,0 +1,36 @@
+/*! \file maths.h
+ *  \brief Headers of math helper functions.
+ */
+/*
+ * Copyright (c) Sebastian Krzyszkowiak <dos@dosowisko.net>
+ *
+ * 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; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 LIBSUPERDERPY_MATHS_H
+#define LIBSUPERDERPY_MATHS_H
+
+#include "libsuperderpy.h"
+#include <allegro5/allegro.h>
+#include <allegro5/allegro_font.h>
+
+double DotProduct(const double v[], const double u[], int n);
+double VectorLength(double x, double y, double z);
+double Wrap(double left, double right, double val);
+double Clamp(double left, double right, double val);
+double Lerp(double left, double right, double pos);
+double Sign(double val);
+double Fract(double val);
+
+#endif

src/utils.c

@@ -132,40 +132,6 @@ SYMBOL_EXPORT void DrawCenteredTintedScaled(ALLEGRO_BITMAP* bitmap, ALLEGRO_COLO
 		x, y, sx, sy, 0, flags);
 }
 
-SYMBOL_EXPORT double DotProduct(const double v[], const double u[], int n) {
-	float result = 0.0;
-	for (int i = 0; i < n; i++) {
-		result += v[i] * u[i];
-	}
-	return result;
-}
-
-SYMBOL_EXPORT double VectorLength(double x, double y, double z) {
-	return sqrt(pow(x, 2) + pow(y, 2) + pow(z, 2));
-}
-
-SYMBOL_EXPORT double Wrap(double left, double right, double val) {
-	return left + fmod(val - left, right - left);
-}
-
-SYMBOL_EXPORT double Clamp(double left, double right, double val) {
-	if (val > right) {
-		return right;
-	}
-	if (val < left) {
-		return left;
-	}
-	return val;
-}
-
-SYMBOL_EXPORT double Lerp(double left, double right, double pos) {
-	return left + (right - left) * pos;
-}
-
-SYMBOL_EXPORT double Sign(double val) {
-	return val / fabs(val);
-}
-
 /* linear filtering code written by SiegeLord */
 SYMBOL_EXPORT ALLEGRO_COLOR InterpolateColor(ALLEGRO_COLOR c1, ALLEGRO_COLOR c2, float frac) {
 	return al_map_rgba_f(c1.r + frac * (c2.r - c1.r),

src/utils.h

@@ -58,13 +58,6 @@ void DrawCentered(ALLEGRO_BITMAP* bitmap, int x, int y, int flags);
 void DrawCenteredScaled(ALLEGRO_BITMAP* bitmap, int x, int y, double sx, double sy, int flags);
 void DrawCenteredTintedScaled(ALLEGRO_BITMAP* bitmap, ALLEGRO_COLOR tint, int x, int y, double sx, double sy, int flags);
 
-double DotProduct(const double v[], const double u[], int n);
-double VectorLength(double x, double y, double z);
-double Wrap(double left, double right, double val);
-double Clamp(double left, double right, double val);
-double Lerp(double left, double right, double pos);
-double Sign(double val);
-
 ALLEGRO_COLOR InterpolateColor(ALLEGRO_COLOR c1, ALLEGRO_COLOR c2, float frac);
 void ScaleBitmap(ALLEGRO_BITMAP* source, int width, int height);