From 128c16ee571c3fc4c49022b54f5b9276c49ac27f Mon Sep 17 00:00:00 2001
From: Orestis Malaspinas <orestis.malaspinas@hesge.ch>
Date: Mon, 24 Aug 2020 16:18:35 +0200
Subject: [PATCH] adding vec2 code and tests
---
travail_pratique/vec2/Makefile | 15 +
travail_pratique/vec2/main.c | 15 +
travail_pratique/vec2/tests/Makefile | 18 ++
travail_pratique/vec2/tests/minunit.h | 391 +++++++++++++++++++++++
travail_pratique/vec2/tests/vec2_tests.c | 117 +++++++
travail_pratique/vec2/vec2.c | 49 +++
travail_pratique/vec2/vec2.h | 28 ++
7 files changed, 633 insertions(+)
create mode 100644 travail_pratique/vec2/Makefile
create mode 100644 travail_pratique/vec2/main.c
create mode 100644 travail_pratique/vec2/tests/Makefile
create mode 100644 travail_pratique/vec2/tests/minunit.h
create mode 100644 travail_pratique/vec2/tests/vec2_tests.c
create mode 100644 travail_pratique/vec2/vec2.c
create mode 100644 travail_pratique/vec2/vec2.h
diff --git a/travail_pratique/vec2/Makefile b/travail_pratique/vec2/Makefile
new file mode 100644
index 0000000..668479b
--- /dev/null
+++ b/travail_pratique/vec2/Makefile
@@ -0,0 +1,15 @@
+CC=gcc
+OPTS=-g -O3 -Wall -Wextra
+LINK=-lm
+
+main: main.o vec2.o
+ $(CC) $(OPTS) -o $@ $^ $(LINK)
+
+main.o: main.c
+ $(CC) $(OPTS) -c $^
+
+vec2.o: vec2.c vec2.h
+ $(CC) $(OPTS) -c $^
+
+clean:
+ rm -f *.o main
\ No newline at end of file
diff --git a/travail_pratique/vec2/main.c b/travail_pratique/vec2/main.c
new file mode 100644
index 0000000..841254d
--- /dev/null
+++ b/travail_pratique/vec2/main.c
@@ -0,0 +1,15 @@
+#include <stdlib.h>
+#include "vec2.h"
+
+int main() {
+ vec2 v1 = vec2_create(1.0, -1.0);
+ // vec2_print(v1);
+ vec2 v2 = vec2_create(4.0, -2.0);
+ // vec2_print(v2);
+
+ vec2 v3 = vec2_sub(v1, v2);
+
+ vec2_print(v3);
+
+ return EXIT_SUCCESS;
+}
\ No newline at end of file
diff --git a/travail_pratique/vec2/tests/Makefile b/travail_pratique/vec2/tests/Makefile
new file mode 100644
index 0000000..7966f6f
--- /dev/null
+++ b/travail_pratique/vec2/tests/Makefile
@@ -0,0 +1,18 @@
+CC=gcc
+OPTS=-g -O3 -Wall -Wextra
+LINK=-lm
+
+vec2_tests: vec2_tests.o vec2.o
+ $(CC) $(OPTS) -o $@ $^ $(LINK)
+
+test: vec2_tests
+ ./vec2_tests
+
+vec2_tests.o: vec2_tests.c
+ $(CC) $(OPTS) -c $^
+
+vec2.o: ../vec2.c ../vec2.h
+ $(CC) $(OPTS) -c $^
+
+clean:
+ rm -f *.o vec2_tests
\ No newline at end of file
diff --git a/travail_pratique/vec2/tests/minunit.h b/travail_pratique/vec2/tests/minunit.h
new file mode 100644
index 0000000..b716888
--- /dev/null
+++ b/travail_pratique/vec2/tests/minunit.h
@@ -0,0 +1,391 @@
+/*
+ * Copyright (c) 2012 David Siñuela Pastor, siu.4coders@gmail.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef MINUNIT_MINUNIT_H
+#define MINUNIT_MINUNIT_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#if defined(_WIN32)
+#include <Windows.h>
+#if defined(_MSC_VER) && _MSC_VER < 1900
+ #define snprintf _snprintf
+ #define __func__ __FUNCTION__
+#endif
+
+#elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
+
+/* Change POSIX C SOURCE version for pure c99 compilers */
+#if !defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE < 200112L
+#undef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 200112L
+#endif
+
+#include <unistd.h> /* POSIX flags */
+#include <time.h> /* clock_gettime(), time() */
+#include <sys/time.h> /* gethrtime(), gettimeofday() */
+#include <sys/resource.h>
+#include <sys/times.h>
+#include <string.h>
+
+#if defined(__MACH__) && defined(__APPLE__)
+#include <mach/mach.h>
+#include <mach/mach_time.h>
+#endif
+
+#if __GNUC__ >= 5 && !defined(__STDC_VERSION__)
+#define __func__ __extension__ __FUNCTION__
+#endif
+
+#else
+#error "Unable to define timers for an unknown OS."
+#endif
+
+#include <stdio.h>
+#include <math.h>
+
+/* Maximum length of last message */
+#define MINUNIT_MESSAGE_LEN 1024
+/* Accuracy with which floats are compared */
+#define MINUNIT_EPSILON 1E-12
+
+/* Misc. counters */
+static int minunit_run = 0;
+static int minunit_assert = 0;
+static int minunit_fail = 0;
+static int minunit_status = 0;
+
+/* Timers */
+static double minunit_real_timer = 0;
+static double minunit_proc_timer = 0;
+
+/* Last message */
+static char minunit_last_message[MINUNIT_MESSAGE_LEN];
+
+/* Test setup and teardown function pointers */
+static void (*minunit_setup)(void) = NULL;
+static void (*minunit_teardown)(void) = NULL;
+
+/* Definitions */
+#define MU_TEST(method_name) static void method_name(void)
+#define MU_TEST_SUITE(suite_name) static void suite_name(void)
+
+#define MU__SAFE_BLOCK(block) do {\
+ block\
+} while(0)
+
+/* Run test suite and unset setup and teardown functions */
+#define MU_RUN_SUITE(suite_name) MU__SAFE_BLOCK(\
+ suite_name();\
+ minunit_setup = NULL;\
+ minunit_teardown = NULL;\
+)
+
+/* Configure setup and teardown functions */
+#define MU_SUITE_CONFIGURE(setup_fun, teardown_fun) MU__SAFE_BLOCK(\
+ minunit_setup = setup_fun;\
+ minunit_teardown = teardown_fun;\
+)
+
+/* Test runner */
+#define MU_RUN_TEST(test) MU__SAFE_BLOCK(\
+ if (minunit_real_timer==0 && minunit_proc_timer==0) {\
+ minunit_real_timer = mu_timer_real();\
+ minunit_proc_timer = mu_timer_cpu();\
+ }\
+ if (minunit_setup) (*minunit_setup)();\
+ minunit_status = 0;\
+ test();\
+ minunit_run++;\
+ if (minunit_status) {\
+ minunit_fail++;\
+ printf("F");\
+ printf("\n%s\n", minunit_last_message);\
+ }\
+ fflush(stdout);\
+ if (minunit_teardown) (*minunit_teardown)();\
+)
+
+/* Report */
+#define MU_REPORT() MU__SAFE_BLOCK(\
+ double minunit_end_real_timer;\
+ double minunit_end_proc_timer;\
+ printf("\n\n%d tests, %d assertions, %d failures\n", minunit_run, minunit_assert, minunit_fail);\
+ minunit_end_real_timer = mu_timer_real();\
+ minunit_end_proc_timer = mu_timer_cpu();\
+ printf("\nFinished in %.8f seconds (real) %.8f seconds (proc)\n\n",\
+ minunit_end_real_timer - minunit_real_timer,\
+ minunit_end_proc_timer - minunit_proc_timer);\
+)
+#define MU_EXIT_CODE minunit_fail
+
+/* Assertions */
+#define mu_check(test) MU__SAFE_BLOCK(\
+ minunit_assert++;\
+ if (!(test)) {\
+ snprintf(minunit_last_message, MINUNIT_MESSAGE_LEN, "%s failed:\n\t%s:%d: %s", __func__, __FILE__, __LINE__, #test);\
+ minunit_status = 1;\
+ return;\
+ } else {\
+ printf(".");\
+ }\
+)
+
+#define mu_fail(message) MU__SAFE_BLOCK(\
+ minunit_assert++;\
+ snprintf(minunit_last_message, MINUNIT_MESSAGE_LEN, "%s failed:\n\t%s:%d: %s", __func__, __FILE__, __LINE__, message);\
+ minunit_status = 1;\
+ return;\
+)
+
+#define mu_assert(test, message) MU__SAFE_BLOCK(\
+ minunit_assert++;\
+ if (!(test)) {\
+ snprintf(minunit_last_message, MINUNIT_MESSAGE_LEN, "%s failed:\n\t%s:%d: %s", __func__, __FILE__, __LINE__, message);\
+ minunit_status = 1;\
+ return;\
+ } else {\
+ printf(".");\
+ }\
+)
+
+#define mu_assert_int_eq(expected, result) MU__SAFE_BLOCK(\
+ int minunit_tmp_e;\
+ int minunit_tmp_r;\
+ minunit_assert++;\
+ minunit_tmp_e = (expected);\
+ minunit_tmp_r = (result);\
+ if (minunit_tmp_e != minunit_tmp_r) {\
+ snprintf(minunit_last_message, MINUNIT_MESSAGE_LEN, "%s failed:\n\t%s:%d: %d expected but was %d", __func__, __FILE__, __LINE__, minunit_tmp_e, minunit_tmp_r);\
+ minunit_status = 1;\
+ return;\
+ } else {\
+ printf(".");\
+ }\
+)
+
+#define mu_assert_double_eq(expected, result) MU__SAFE_BLOCK(\
+ double minunit_tmp_e;\
+ double minunit_tmp_r;\
+ minunit_assert++;\
+ minunit_tmp_e = (expected);\
+ minunit_tmp_r = (result);\
+ if (fabs(minunit_tmp_e-minunit_tmp_r) > MINUNIT_EPSILON) {\
+ int minunit_significant_figures = 1 - log10(MINUNIT_EPSILON);\
+ snprintf(minunit_last_message, MINUNIT_MESSAGE_LEN, "%s failed:\n\t%s:%d: %.*g expected but was %.*g", __func__, __FILE__, __LINE__, minunit_significant_figures, minunit_tmp_e, minunit_significant_figures, minunit_tmp_r);\
+ minunit_status = 1;\
+ return;\
+ } else {\
+ printf(".");\
+ }\
+)
+
+#define mu_assert_string_eq(expected, result) MU__SAFE_BLOCK(\
+ const char* minunit_tmp_e = expected;\
+ const char* minunit_tmp_r = result;\
+ minunit_assert++;\
+ if (!minunit_tmp_e) {\
+ minunit_tmp_e = "<null pointer>";\
+ }\
+ if (!minunit_tmp_r) {\
+ minunit_tmp_r = "<null pointer>";\
+ }\
+ if(strcmp(minunit_tmp_e, minunit_tmp_r)) {\
+ snprintf(minunit_last_message, MINUNIT_MESSAGE_LEN, "%s failed:\n\t%s:%d: '%s' expected but was '%s'", __func__, __FILE__, __LINE__, minunit_tmp_e, minunit_tmp_r);\
+ minunit_status = 1;\
+ return;\
+ } else {\
+ printf(".");\
+ }\
+)
+
+/*
+ * The following two functions were written by David Robert Nadeau
+ * from http://NadeauSoftware.com/ and distributed under the
+ * Creative Commons Attribution 3.0 Unported License
+ */
+
+/**
+ * Returns the real time, in seconds, or -1.0 if an error occurred.
+ *
+ * Time is measured since an arbitrary and OS-dependent start time.
+ * The returned real time is only useful for computing an elapsed time
+ * between two calls to this function.
+ */
+static double mu_timer_real(void)
+{
+#if defined(_WIN32)
+ /* Windows 2000 and later. ---------------------------------- */
+ LARGE_INTEGER Time;
+ LARGE_INTEGER Frequency;
+
+ QueryPerformanceFrequency(&Frequency);
+ QueryPerformanceCounter(&Time);
+
+ Time.QuadPart *= 1000000;
+ Time.QuadPart /= Frequency.QuadPart;
+
+ return (double)Time.QuadPart / 1000000.0;
+
+#elif (defined(__hpux) || defined(hpux)) || ((defined(__sun__) || defined(__sun) || defined(sun)) && (defined(__SVR4) || defined(__svr4__)))
+ /* HP-UX, Solaris. ------------------------------------------ */
+ return (double)gethrtime( ) / 1000000000.0;
+
+#elif defined(__MACH__) && defined(__APPLE__)
+ /* OSX. ----------------------------------------------------- */
+ static double timeConvert = 0.0;
+ if ( timeConvert == 0.0 )
+ {
+ mach_timebase_info_data_t timeBase;
+ (void)mach_timebase_info( &timeBase );
+ timeConvert = (double)timeBase.numer /
+ (double)timeBase.denom /
+ 1000000000.0;
+ }
+ return (double)mach_absolute_time( ) * timeConvert;
+
+#elif defined(_POSIX_VERSION)
+ /* POSIX. --------------------------------------------------- */
+ struct timeval tm;
+#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
+ {
+ struct timespec ts;
+#if defined(CLOCK_MONOTONIC_PRECISE)
+ /* BSD. --------------------------------------------- */
+ const clockid_t id = CLOCK_MONOTONIC_PRECISE;
+#elif defined(CLOCK_MONOTONIC_RAW)
+ /* Linux. ------------------------------------------- */
+ const clockid_t id = CLOCK_MONOTONIC_RAW;
+#elif defined(CLOCK_HIGHRES)
+ /* Solaris. ----------------------------------------- */
+ const clockid_t id = CLOCK_HIGHRES;
+#elif defined(CLOCK_MONOTONIC)
+ /* AIX, BSD, Linux, POSIX, Solaris. ----------------- */
+ const clockid_t id = CLOCK_MONOTONIC;
+#elif defined(CLOCK_REALTIME)
+ /* AIX, BSD, HP-UX, Linux, POSIX. ------------------- */
+ const clockid_t id = CLOCK_REALTIME;
+#else
+ const clockid_t id = (clockid_t)-1; /* Unknown. */
+#endif /* CLOCK_* */
+ if ( id != (clockid_t)-1 && clock_gettime( id, &ts ) != -1 )
+ return (double)ts.tv_sec +
+ (double)ts.tv_nsec / 1000000000.0;
+ /* Fall thru. */
+ }
+#endif /* _POSIX_TIMERS */
+
+ /* AIX, BSD, Cygwin, HP-UX, Linux, OSX, POSIX, Solaris. ----- */
+ gettimeofday( &tm, NULL );
+ return (double)tm.tv_sec + (double)tm.tv_usec / 1000000.0;
+#else
+ return -1.0; /* Failed. */
+#endif
+}
+
+/**
+ * Returns the amount of CPU time used by the current process,
+ * in seconds, or -1.0 if an error occurred.
+ */
+static double mu_timer_cpu(void)
+{
+#if defined(_WIN32)
+ /* Windows -------------------------------------------------- */
+ FILETIME createTime;
+ FILETIME exitTime;
+ FILETIME kernelTime;
+ FILETIME userTime;
+
+ /* This approach has a resolution of 1/64 second. Unfortunately, Windows' API does not offer better */
+ if ( GetProcessTimes( GetCurrentProcess( ),
+ &createTime, &exitTime, &kernelTime, &userTime ) != 0 )
+ {
+ ULARGE_INTEGER userSystemTime;
+ memcpy(&userSystemTime, &userTime, sizeof(ULARGE_INTEGER));
+ return (double)userSystemTime.QuadPart / 10000000.0;
+ }
+
+#elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
+ /* AIX, BSD, Cygwin, HP-UX, Linux, OSX, and Solaris --------- */
+
+#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
+ /* Prefer high-res POSIX timers, when available. */
+ {
+ clockid_t id;
+ struct timespec ts;
+#if _POSIX_CPUTIME > 0
+ /* Clock ids vary by OS. Query the id, if possible. */
+ if ( clock_getcpuclockid( 0, &id ) == -1 )
+#endif
+#if defined(CLOCK_PROCESS_CPUTIME_ID)
+ /* Use known clock id for AIX, Linux, or Solaris. */
+ id = CLOCK_PROCESS_CPUTIME_ID;
+#elif defined(CLOCK_VIRTUAL)
+ /* Use known clock id for BSD or HP-UX. */
+ id = CLOCK_VIRTUAL;
+#else
+ id = (clockid_t)-1;
+#endif
+ if ( id != (clockid_t)-1 && clock_gettime( id, &ts ) != -1 )
+ return (double)ts.tv_sec +
+ (double)ts.tv_nsec / 1000000000.0;
+ }
+#endif
+
+#if defined(RUSAGE_SELF)
+ {
+ struct rusage rusage;
+ if ( getrusage( RUSAGE_SELF, &rusage ) != -1 )
+ return (double)rusage.ru_utime.tv_sec +
+ (double)rusage.ru_utime.tv_usec / 1000000.0;
+ }
+#endif
+
+#if defined(_SC_CLK_TCK)
+ {
+ const double ticks = (double)sysconf( _SC_CLK_TCK );
+ struct tms tms;
+ if ( times( &tms ) != (clock_t)-1 )
+ return (double)tms.tms_utime / ticks;
+ }
+#endif
+
+#if defined(CLOCKS_PER_SEC)
+ {
+ clock_t cl = clock( );
+ if ( cl != (clock_t)-1 )
+ return (double)cl / (double)CLOCKS_PER_SEC;
+ }
+#endif
+
+#endif
+
+ return -1; /* Failed. */
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MINUNIT_MINUNIT_H */
diff --git a/travail_pratique/vec2/tests/vec2_tests.c b/travail_pratique/vec2/tests/vec2_tests.c
new file mode 100644
index 0000000..49af2f2
--- /dev/null
+++ b/travail_pratique/vec2/tests/vec2_tests.c
@@ -0,0 +1,117 @@
+#include "minunit.h"
+#include "../vec2.h"
+
+static vec2 four_two;
+static vec2 minus_three_nine;
+static vec2 e_x;
+static vec2 e_y;
+static double alpha = 0.0;
+
+
+void test_setup(void) {
+ four_two = vec2_create(4.0, 2.0);
+ minus_three_nine = vec2_create(-3.0, 9.0);
+
+ e_x = vec2_create(1.0, 0.0);
+ e_y = vec2_create(0.0, 1.0);
+
+ alpha = 1.5;
+}
+
+void test_teardown(void) {
+ /* Nothing */
+}
+
+MU_TEST(test_vec2_create) {
+ mu_assert_double_eq(four_two.x, 4.0);
+ mu_assert_double_eq(four_two.y, 2.0);
+ mu_assert(vec2_is_approx_equal(four_two, vec2_create(4.0, 2.0), MINUNIT_EPSILON), "four_two should be (4.0, 2.0).");
+
+ mu_assert_double_eq(minus_three_nine.x, -3.0);
+ mu_assert_double_eq(minus_three_nine.y, 9.0);
+
+ mu_assert_double_eq(e_x.x, 1.0);
+ mu_assert_double_eq(e_x.y, 0.0);
+
+ mu_assert_double_eq(e_y.x, 0.0);
+ mu_assert_double_eq(e_y.y, 1.0);
+}
+
+MU_TEST(test_vec2_add) {
+ mu_assert(
+ vec2_is_approx_equal(
+ vec2_add(four_two, minus_three_nine),
+ vec2_create(1.0, 11.0), MINUNIT_EPSILON),
+ "(4,2)+(-3,9)=(1, 11)."
+ );
+ mu_assert(
+ vec2_is_approx_equal(
+ vec2_add(four_two, minus_three_nine),
+ vec2_add(minus_three_nine, four_two), MINUNIT_EPSILON),
+ "Addition is commutative."
+ );
+}
+
+MU_TEST(test_vec2_sub) {
+ mu_assert(
+ vec2_is_approx_equal(
+ vec2_sub(four_two, minus_three_nine),
+ vec2_create(7.0, -7.0), MINUNIT_EPSILON),
+ "(4,2)-(-3,9)=(7, -7)."
+ );
+
+ mu_assert(
+ vec2_is_approx_equal(
+ vec2_sub(four_two, minus_three_nine),
+ vec2_add(four_two, vec2_mul(-1.0, minus_three_nine)), MINUNIT_EPSILON),
+ "(4,2) - (-3,9) = (4,2) + (-1) * (-3,9)."
+ );
+}
+
+MU_TEST(test_vec2_mul) {
+ mu_assert(
+ vec2_is_approx_equal(
+ vec2_mul(alpha, minus_three_nine),
+ vec2_create(-4.5, 13.5), MINUNIT_EPSILON),
+ "1.5 * (-3,9)=(-4.5, 13.5)."
+ );
+
+ mu_assert(
+ vec2_is_approx_equal(
+ vec2_add(vec2_mul(4.0, e_x), vec2_mul(2.0, e_y)),
+ four_two, MINUNIT_EPSILON),
+ "4 * (1,0) + 2 * (0,1) = (4,2)."
+ );
+}
+
+
+
+MU_TEST(test_vec2_scalar_product) {
+ mu_assert_double_eq(
+ vec2_scalar_product(four_two, minus_three_nine),
+ 6.0
+ );
+
+ mu_assert_double_eq(
+ vec2_scalar_product(e_x, e_y),
+ 0.0
+ );
+}
+
+MU_TEST_SUITE(test_suite) {
+ MU_SUITE_CONFIGURE(&test_setup, &test_teardown);
+
+ MU_RUN_TEST(test_vec2_create);
+
+ MU_RUN_TEST(test_vec2_add);
+ MU_RUN_TEST(test_vec2_sub);
+ MU_RUN_TEST(test_vec2_mul);
+ MU_RUN_TEST(test_vec2_scalar_product);
+}
+
+int main() {
+ MU_RUN_SUITE(test_suite);
+ MU_REPORT();
+ return MU_EXIT_CODE;
+}
+
diff --git a/travail_pratique/vec2/vec2.c b/travail_pratique/vec2/vec2.c
new file mode 100644
index 0000000..a2b787e
--- /dev/null
+++ b/travail_pratique/vec2/vec2.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <math.h>
+#include "vec2.h"
+
+vec2 vec2_create(double x_, double y_) {
+ vec2 v = {.x = x_, .y = y_};
+ return v;
+}
+
+vec2 vec2_add(vec2 lhs, vec2 rhs) {
+ return vec2_create(
+ lhs.x + rhs.x,
+ lhs.y + rhs.y
+ );
+}
+
+vec2 vec2_sub(vec2 lhs, vec2 rhs) {
+ return vec2_create(
+ lhs.x - rhs.x,
+ lhs.y - rhs.y
+ );
+}
+
+vec2 vec2_mul(double scalar, vec2 lhs) {
+ return vec2_create(
+ scalar * lhs.x,
+ scalar * lhs.y
+ );
+}
+
+double vec2_scalar_product(vec2 lhs, vec2 rhs) {
+ return lhs.x * rhs.x + lhs.y * rhs.y;
+}
+
+double vec2_norm_sqr(vec2 v) {
+ return vec2_scalar_product(v, v);
+}
+
+double vec2_norm(vec2 v) {
+ return sqrt(vec2_norm_sqr(v));
+}
+
+bool vec2_is_approx_equal(vec2 lhs, vec2 rhs, double eps) {
+ return vec2_norm(vec2_sub(lhs, rhs)) < eps;
+}
+
+void vec2_print(vec2 v) {
+ printf("x = %f, y = %f\n", v.x, v.y);
+}
\ No newline at end of file
diff --git a/travail_pratique/vec2/vec2.h b/travail_pratique/vec2/vec2.h
new file mode 100644
index 0000000..d90a580
--- /dev/null
+++ b/travail_pratique/vec2/vec2.h
@@ -0,0 +1,28 @@
+#ifndef _VEC2_H_
+#define _VEC2_H_
+
+#include <stdbool.h>
+
+typedef struct _vec2 {
+ double x, y;
+} vec2;
+
+vec2 vec2_create(double x_, double y_);
+
+vec2 vec2_add(vec2 lhs, vec2 rhs);
+
+vec2 vec2_sub(vec2 lhs, vec2 rhs);
+
+vec2 vec2_mul(double scalar, vec2 lhs);
+
+double vec2_scalar_product(vec2 lhs, vec2 rhs);
+
+double vec2_norm_sqr(vec2 v);
+
+double vec2_norm(vec2 v);
+
+bool vec2_is_approx_equal(vec2 lhs, vec2 rhs, double eps);
+
+void vec2_print(vec2 v);
+
+#endif
\ No newline at end of file
--
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