updated vec2 lib and tests

travail_pratique/vec2/main.c

 #include <stdlib.h>
+#include <stdio.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 v2 = vec2_create(4.0, 2.0);
     // vec2_print(v2);
 
     vec2 v3 = vec2_sub(v1, v2);
 
     vec2_print(v3);
 
+    printf("%f\n", vec2_dot(v2, vec2_create(1.0, 0.0)));
+
     return EXIT_SUCCESS;
 }
\ No newline at end of file

travail_pratique/vec2/tests/vec2_tests.c

 #include "minunit.h"
 #include "../vec2.h"
+#include <math.h>
 
 static vec2 four_two;
 static vec2 minus_three_nine;
@@ -84,18 +85,43 @@ MU_TEST(test_vec2_mul) {
     );
 }
 
-
-
-MU_TEST(test_vec2_scalar_product) {
+MU_TEST(test_vec2_dot) {
     mu_assert_double_eq(
-        vec2_scalar_product(four_two, minus_three_nine), 
+        vec2_dot(four_two, minus_three_nine), 
         6.0
     );
 
     mu_assert_double_eq(
-        vec2_scalar_product(e_x, e_y), 
+        vec2_dot(e_x, e_y), 
         0.0
     );
+
+    mu_assert_double_eq(
+        vec2_dot(four_two, e_x), 
+        4.0
+    );
+
+    mu_assert_double_eq(
+        vec2_dot(four_two, e_y), 
+        2.0
+    );
+}
+
+MU_TEST(test_vec2_norm) {
+    mu_assert_double_eq(
+        vec2_norm(e_x), 
+        1.0
+    );
+
+    mu_assert_double_eq(
+        vec2_norm(e_y), 
+        1.0
+    );
+
+    mu_assert_double_eq(
+        vec2_norm(four_two), 
+        sqrt(20.0)
+    );
 }
 
 MU_TEST_SUITE(test_suite) {
@@ -106,7 +132,8 @@ MU_TEST_SUITE(test_suite) {
 	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);
+	MU_RUN_TEST(test_vec2_dot);
+	MU_RUN_TEST(test_vec2_norm);
 }
 
 int main() {

travail_pratique/vec2/vec2.c

@@ -28,12 +28,12 @@ vec2 vec2_mul(double scalar, vec2 lhs) {
     );
 }
 
-double vec2_scalar_product(vec2 lhs, vec2 rhs) {
+double vec2_dot(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);
+    return vec2_dot(v, v);
 }
 
 double vec2_norm(vec2 v) {

travail_pratique/vec2/vec2.h

@@ -15,7 +15,7 @@ vec2 vec2_sub(vec2 lhs, vec2 rhs);
 
 vec2 vec2_mul(double scalar, vec2 lhs);
 
-double vec2_scalar_product(vec2 lhs, vec2 rhs);
+double vec2_dot(vec2 lhs, vec2 rhs);
 
 double vec2_norm_sqr(vec2 v);