From 5a0a8bea9ed8392572e0f38e36c3d34fd319cf65 Mon Sep 17 00:00:00 2001
From: Boris Stefanovic <owldev@bluewin.ch>
Date: Mon, 9 May 2022 11:27:52 +0200
Subject: [PATCH] ADD: main
---
src/field.h | 14 +++++++-------
src/main.c | 22 ++++++++++++++++++++++
2 files changed, 29 insertions(+), 7 deletions(-)
diff --git a/src/field.h b/src/field.h
index eac1d4e..45c00f3 100644
--- a/src/field.h
+++ b/src/field.h
@@ -1,15 +1,11 @@
#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_t;
-
// Compute E*qP/norm(qP)
// Return false if norm(qP) < eps
bool compute_e(charge_t c, vec2 p, double eps, vec2 *e);
@@ -22,11 +18,15 @@ bool compute_total_normalized_e(charge_t *charges, int num_charges, vec2 p, doub
// 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);
+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);
+static void
+draw_charges(struct gfx_context_t *context, charge_t *charges, int num_charges, double x0, double x1, double y0,
+ double y1);
#endif
diff --git a/src/main.c b/src/main.c
index 069ed50..2953200 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,28 @@
#include <stdlib.h>
+#include <time.h>
#include "draw.h"
+#include "../utils/utils.h"
+
+#define SIDE_LEN 1000
+#define WID SIDE_LEN
+#define HEI WID
+#define NCHARGES 2
+#define DX 0.0005
+#define NPOINTS 32
int main() {
+ srand(time(NULL));
+ charge_t charges[NCHARGES] = {
+ {.q=-0.25, .pos=vec2_create(0.25, 0.5)},
+ {.q=0.25, .pos=vec2_create(0.75, 0.5)},
+ };
+ struct gfx_context_t *ctxt = gfx_create("elec", WID, HEI);
+ draw_charges(ctxt, charges, NCHARGES, 0.0, 1.0, 0.0, 1.0);
+ for (int i = 0; i < NPOINTS; ++i) {
+ vec2 start = vec2_normalize(vec2_create(rand(), rand()));
+ draw_field_line(ctxt, charges, NCHARGES, DX, start, 0.0, 1.0, 0.0, 1.0);
+ }
+ while (gfx_keypressed() != SDLK_ESCAPE) gfx_present(ctxt);
+ gfx_destroy(ctxt);
return EXIT_SUCCESS;
}
--
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