IMPORT: physics signatures

.gitignore

 .idea
 build
 *.o
-doc/*.pdf
+*.pdf

src/field.c

+#include "physics.h"
+#include <math.h>
+#include <stdlib.h>
+
+
+// Compute E*qP/norm(qP)
+// Return false if norm(qP) < eps
+bool compute_e(charge_t c, vec2 p, double eps, vec2 *e){
+ return EXIT_SUCCESS;
+}
+
+// Compute the normalized sum of Ei*qiP/norm(qiP)
+// Return false if for some qiP, norm(qiP) < eps
+bool compute_total_normalized_e(charge_t *charges, int num_charges, vec2 p, double eps, vec2 *e){
+ return EXIT_SUCCESS;
+}
+
+// Compute and then draw all the points belonging to a field line,
+// starting from pos0.
+// Returns false if pos0 is not a valid position
+// (for example if pos0 is too close to a charge).
+static bool draw_field_line(struct gfx_context_t *ctxt, charge_t *charges, int num_charges, double dx, vec2 pos0, double x0, double x1, double y0, double y1){
+ return EXIT_SUCCESS;
+}
+
+// Draw all the charges
+// A circle with minus sign for negative charges
+// A circle with a plus sign for positive charges
+static void draw_charges(struct gfx_context_t *context, charge_t *charges, int num_charges, double x0, double x1, double y0, double y1){
+
+}

src/field.h

+#ifndef _PHYSIQUE_H_
+#define _PHYSIQUE_H_
+#include "../utils/vec2/vec2.h"
+#include "../utils/gfx/gfx.h"
+#include "../utils/utils.h"
+#include <stdio.h>
+
+typedef struct charge_t
+{
+    double q;
+    vec2 pos;
+} charge;
+
+// Compute E*qP/norm(qP)
+// Return false if norm(qP) < eps
+bool compute_e(charge_t c, vec2 p, double eps, vec2 *e);
+
+// Compute the normalized sum of Ei*qiP/norm(qiP)
+// Return false if for some qiP, norm(qiP) < eps
+bool compute_total_normalized_e(charge_t *charges, int num_charges, vec2 p, double eps, vec2 *e);
+
+// Compute and then draw all the points belonging to a field line,
+// starting from pos0.
+// Returns false if pos0 is not a valid position
+// (for example if pos0 is too close to a charge).
+static bool draw_field_line(struct gfx_context_t *ctxt, charge_t *charges, int num_charges, double dx, vec2 pos0, double x0, double x1, double y0, double y1);
+
+// Draw all the charges
+// A circle with minus sign for negative charges
+// A circle with a plus sign for positive charges
+static void draw_charges(struct gfx_context_t *context, charge_t *charges, int num_charges, double x0, double x1, double y0, double y1);
+
+#endif