First primitive cardioid drawing

4 files changed, 165 insertions, 73 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);
+}
diff --git a/src/grahpics.c b/src/grahpics.c
deleted file mode 100644
index ae9409d..0000000
--- a/src/grahpics.c
+++ /dev/null
@@ -1,71 +0,0 @@
-#include "graphics.h"
-
-#define WINDOW_TITLE "Title"
-
-static const char	*g_sdl_error_str;
-
-#define	SDL_CALL(x)                              \
-	SDL_ClearError();                            \
-	x;                                           \
-	g_sdl_error_str = SDL_GetError();            \
-	if (*g_sdl_error_str != '\0') {              \
-    	SDL_Log("ERROR SDL: %s", g_sdl_error_str); \
-		exit(EXIT_FAILURE);                      \
-	}
-
-
-static void	update(t_state *state);
-static void	event_handler(t_state *state);
-
-void		graphics_init(t_state *state, int width, int height)
-{
-    SDL_CALL(SDL_Init(SDL_INIT_VIDEO));
-    SDL_CALL(state->window = SDL_CreateWindow(
-		WINDOW_TITLE,
-		SDL_WINDOWPOS_UNDEFINED,
-		SDL_WINDOWPOS_UNDEFINED,
-		width,
-		height,
-		0
-	));
-    SDL_CALL(state->renderer = SDL_CreateRenderer(state->window, -1, 0));
-    state->running = true;
-}
-
-void 		graphics_quit(t_state *state)
-{
-    SDL_DestroyRenderer(state->renderer);
-    SDL_DestroyWindow(state->window);
-    SDL_Quit();
-}
-
-void 		graphics_run(t_state *state)
-{
-    while (state->running)
-    {
-        event_handler(state);
-        update(state);
-        SDL_Delay(3);
-    }
-}
-
-static
-void		update(t_state *state)
-{
-    // do stuff
-}
-
-static
-void		event_handler(t_state *state)
-{
-    SDL_Event e;
-    while (SDL_PollEvent(&e))
-    {
-        switch (e.type)
-        {
-            case SDL_QUIT:
-                state->running = false;
-                break;
-        }
-    }
-}
diff --git a/src/graphics.c b/src/graphics.c
new file mode 100644
index 0000000..2c5ef7e
--- /dev/null
+++ b/src/graphics.c
@@ -0,0 +1,104 @@
+#include "graphics.h"
+
+#define WINDOW_TITLE "Cardioid"
+
+static const char	*g_sdl_error_str;
+
+#ifdef CARDIOID_RELEASE
+# define SDL_CALL(x) x
+#else
+# define SDL_CALL(x)                                  \
+	SDL_ClearError();                                 \
+	x;                                                \
+	g_sdl_error_str = SDL_GetError();                 \
+	if (*g_sdl_error_str != '\0') {                   \
+		SDL_Log("[ERROR SDL] %s at %s:%d\n\t"#x,      \
+				g_sdl_error_str, __FILE__, __LINE__); \
+		exit(EXIT_FAILURE);                           \
+}
+#endif
+
+
+static void	update(t_state *state);
+static void	event_handler(t_state *state);
+static void	draw_lines(t_state *state);
+
+void 		graphics_init(t_state *state, int width, int height, t_cardioid *cardioid)
+{
+	SDL_CALL(SDL_Init(SDL_INIT_VIDEO));
+	SDL_CALL(state->window = SDL_CreateWindow(
+				WINDOW_TITLE,
+				SDL_WINDOWPOS_UNDEFINED,
+				SDL_WINDOWPOS_UNDEFINED,
+				width,
+				height,
+				0
+				));
+	SDL_CALL(state->renderer = SDL_CreateRenderer(state->window, -1, 0));
+	state->cardioid = cardioid;
+	state->running = true;
+}
+
+void 		graphics_quit(t_state *state)
+{
+	SDL_DestroyRenderer(state->renderer);
+	SDL_DestroyWindow(state->window);
+	SDL_Quit();
+}
+
+void 		graphics_run(t_state *state)
+{
+	while (state->running)
+	{
+		event_handler(state);
+		update(state);
+		SDL_Delay(3);
+	}
+}
+
+	static
+void		update(t_state *state)
+{
+	SDL_CALL(SDL_SetRenderDrawColor(state->renderer, 0, 0, 0, 255));
+	SDL_CALL(SDL_RenderClear(state->renderer));
+	SDL_CALL(SDL_SetRenderDrawColor(state->renderer, 200, 150, 150, 255));
+	SDL_CALL(SDL_RenderDrawPoints(state->renderer, state->cardioid->points, state->cardioid->points_num));
+	draw_lines(state);
+	SDL_CALL(SDL_RenderPresent(state->renderer));
+}
+
+	static
+void		draw_lines(t_state *state)
+{
+	SDL_Point *points = state->cardioid->points;
+	SDL_Point *paired;
+
+	for (size_t i = 0; i < state->cardioid->points_num; i++)
+	{
+		paired = &points[i * 10 % state->cardioid->points_num];
+		SDL_CALL(SDL_RenderDrawLine(state->renderer, points[i].x, points[i].y, paired->x, paired->y));
+	}
+}
+
+	static
+void		event_handler(t_state *state)
+{
+	SDL_Event e;
+
+	while (SDL_PollEvent(&e))
+	{
+		switch (e.type)
+		{
+			case SDL_QUIT:
+				state->running = false;
+				break;
+			case SDL_KEYDOWN:
+				switch (e.key.keysym.sym)
+				{
+					case SDLK_j: CARDIOID_SUB_POINTS(state->cardioid, 3); break;
+					case SDLK_k: CARDIOID_ADD_POINTS(state->cardioid, 3); break;
+				}
+				break;
+		}
+	}
+}
diff --git a/src/main.c b/src/main.c
index 91c8dde..341bfc1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,12 +1,26 @@
 #include "graphics.h"
 
+#define WINDOW_WIDTH 640
+#define WINDOW_HEIGHT 480
+
 int main()
 {
-	t_state	state;
+	t_state		state;
+	t_cardioid	cardioid;
 
-	graphics_init(&state, 640, 480);
+	if (cardioid_init(&cardioid, 10, WINDOW_WIDTH, WINDOW_HEIGHT) == -1)
+	{
+		fprintf(stderr, "[ERROR] couldn't initialize caridoid\n");
+		return (1);
+	}
+	for (size_t i = 0; i < 10; i++)
+	{
+		printf("%d %d\n", cardioid.points[i].x, cardioid.points[i].y);
+	}
+	graphics_init(&state, WINDOW_WIDTH, WINDOW_HEIGHT, &cardioid);
 	graphics_run(&state);
 	graphics_quit(&state);
+	cardioid_quit(&cardioid);
 
 	return 0;
 }