Merge branch 'feature/point-cluster-draw' into 'master'

Added point cluster generation and representation (temp)

See merge request physics/electric-field!5

charge.c

@@ -47,4 +47,16 @@ void draw_charges(struct gfx_context_t *ctxt, charge_t *charges, int num_charges
 
         gfx_draw_circle(ctxt, chCoord, radius, charges[i].q < 0 ? COLOR_BLUE : COLOR_RED);
     }
+}
+
+void generate_points(vec2 points[], int nb_points) {
+    double x = 0;
+    double y = 0;
+
+    for (int i = 0; i < nb_points; i++) {
+        x = rand_one();
+        y = rand_one();
+
+        points[i] = init_vector(x, y);
+    }
 }
\ No newline at end of file

charge.h

@@ -76,4 +76,12 @@ bool draw_field_line(struct gfx_context_t *ctxt, charge_t *charges,
 void draw_charges(struct gfx_context_t *ctxt, charge_t *charges,
                          int num_charges, double x0, double x1, double y0, double y1);
 
+/**
+ * @brief Generate a given amount of points
+ * 
+ * @param points Points array
+ * @param nb_points Number of point to generate
+ */
+void generate_points(vec2 points[], int nb_points);
+
 #endif // _CHARGE_H_
\ No newline at end of file

main.c

@@ -22,6 +22,7 @@
 #define y0 0 // Minimal y of the universe
 #define y1 1 // Maximal y of the universe
 #define NB_CHARGES 2
+#define NB_POINTS 100
 
 int main(void) {
     srand(time(NULL));
@@ -38,6 +39,13 @@ int main(void) {
     charges[1] = charge_create(-10, init_vector(0.75, 0.5));
     draw_charges(ctxt, charges, NB_CHARGES, x0, x1, y0, y1);
 
+    vec2 points[NB_POINTS];
+    generate_points(points, NB_POINTS);
+    for (int i = 0; i < NB_POINTS; i++) {
+        coordinates_t c = position_to_coordinates(WINDOW_WIDTH, WINDOW_HEIGHT, x0, x1, y0, y1, points[i]);
+        gfx_putpixel(ctxt, c.column, c.row, COLOR_WHITE);
+    }    
+
     // GFX Draw loop
     while (gfx_keypressed() != SDLK_ESCAPE){
         gfx_present(ctxt);