First primitive cardioid drawing

1 files changed, 45 insertions, 0 deletions

diff --git a/src/cardioid.c b/src/cardioid.c
new file mode 100644
index 0000000..891de8d
--- /dev/null
+++ b/src/cardioid.c
@@ -0,0 +1,45 @@
+#include "cardioid.h"
+
+int		cardioid_init(t_cardioid *cardioid, size_t points_num, int width, int height)
+{
+	cardioid->points = NULL;
+	cardioid->points_num = points_num;
+	return (cardioid_update_window(cardioid, width, height));
+}
+
+int		cardioid_update_window(t_cardioid *cardioid, int width, int height)
+{
+	cardioid->center.x = width / 2;
+	cardioid->center.y = height / 2;
+	cardioid->radius = MIN(width, height) / 2 - 10;
+	printf("%d %d, %lu\n", cardioid->center.x,
+                        cardioid->center.y,
+                        cardioid->radius);
+
+	return (cardioid_update_points(cardioid, cardioid->points_num));
+}
+
+int		cardioid_update_points(t_cardioid *cardioid, size_t points_num)
+{
+	double		radian_step;
+	double		radian_pos;
+
+	cardioid->points = realloc(cardioid->points, sizeof(SDL_Point) * points_num);
+	if (cardioid->points == NULL)
+		return (-1);
+	cardioid->points_num = points_num;
+	radian_pos = 0;
+	radian_step = (2 * M_PI) / points_num;
+	for (size_t i = 0; i < points_num; i++)
+	{
+		cardioid->points[i].x = cos(radian_pos) * (double)cardioid->radius + (double)cardioid->center.x;
+		cardioid->points[i].y = sin(radian_pos) * (double)cardioid->radius + (double)cardioid->center.y;
+		radian_pos += radian_step;
+	}
+	return (0);
+}
+
+void	cardioid_quit(t_cardioid *cardioid)
+{
+	free(cardioid->points);
+}