save

Makefile

@@ -7,6 +7,9 @@ TESTS:= draw_tests field_tests
 
 all: main
 
+exec: main
+	./main
+
 main: main.o $(OBJFILES)
 	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) -lSDL2
 

src/field.c

@@ -41,11 +41,7 @@ bool is_in_screen(coordinates_t pos) {
 bool draw_field_line_point(struct gfx_context_t *ctxt, charge_t *charges, int num_charges, double x0, double x1, double y0, double y1, vec2 pos, vec2 *pos_next, double delta) {
 	vec2 e;
 	compute_total_normalized_e(charges, num_charges, pos, 0.01, &e);
-	double norm_e = vec2_norm(e);
-
-	// TODO: "Problème ici" ?
-	pos_next->x = pos.x + delta * (e.x / norm_e);
-	pos_next->y = pos.y + delta * (e.y / norm_e);
+	*pos_next = vec2_add(pos, vec2_mul(delta, vec2_normalize(e)));
 
 	if (pos_next->x <= 0 || pos_next->x >= 1 || pos_next->y <= 0 || pos_next->y >= 1)
 		return false;
@@ -61,6 +57,7 @@ bool draw_field_line_point(struct gfx_context_t *ctxt, charge_t *charges, int nu
 	return !is_in_screen(coordinate_pos);
 }
 
+
 bool line_reach_charge(vec2 pos, charge_t *charges, int num_charges, double dx) {
 	for (int j = 0; j < num_charges; ++j) {
 		if (vec2_norm(vec2_sub(pos, charges[j].pos)) < dx / HEI) {
@@ -103,6 +100,7 @@ static bool draw_field_line(struct gfx_context_t *ctxt, charge_t *charges, int n
 	return !stop_positive || !stop_negative;
 }
 
+
 /// Draw all the charges
 /// A circle with minus sign for negative charges
 /// A circle with a plus sign for positive charges
@@ -129,6 +127,7 @@ static void draw_charges(struct gfx_context_t *context, charge_t *charges, int n
 	}
 }
 
+
 void draw_everything(
 		struct gfx_context_t *ctxt,
 		charge_t *charges,