Y draw offset is now set manually.

Using tan and →, the player can now move the view.

include/conf.h

@@ -15,4 +15,7 @@
 #define LEVEL_WIDTH_PX (LEVEL_WIDTH * TILE_SIZE)
 #define LEVEL_HEIGHT_PX (LEVEL_HEIGHT * TILE_SIZE)
 #define DRAW_OFFSET_X 70
-#define DRAW_OFFSET_Y -16
+#define DRAW_OFFSET_Y_MIN -32
+#define DRAW_OFFSET_Y_MAX 0
+#define DRAW_OFFSET_Y_STEP 8
+#define DRAW_OFFSET_Y_DEFAULT -16

include/input.h

@@ -8,13 +8,15 @@
 #include <stdbool.h>
 #include "lazyint.h"
 
-#define KEYS_COUNT 6
+#define KEYS_COUNT 8
 enum {
 	K_LEFT,
 	K_RIGHT,
 	K_DOWN,
 	K_JUMP,
 	K_RESTART,
+	K_CAM_UP,
+	K_CAM_DOWN,
 	K_EXIT
 };
 

src/input.c

@@ -40,6 +40,8 @@ void input_init(Input *input) {
 	input->keys[K_DOWN] = KEY_DOWN;
 	input->keys[K_JUMP] = KEY_SHIFT;
 	input->keys[K_RESTART] = KEY_6;
+	input->keys[K_CAM_UP] = KEY_TAN;
+	input->keys[K_CAM_DOWN] = KEY_ARROW;
 	input->keys[K_EXIT] = KEY_EXIT;
 	for (u8 i = 0; i < KEYS_COUNT; ++i)
 		input->states[i] = S_UP;

src/main.c

@@ -31,6 +31,8 @@ int main(void) {
 	/* Initialize input. */
 	Input input = (Input){};
 	input_init(&input);
+	/* Initalize y offset. */
+	i16 y_offset = DRAW_OFFSET_Y_DEFAULT;
 
 	/* UPS control. */
 	volatile bool has_ticked = true;
@@ -47,10 +49,12 @@ int main(void) {
 			/* Update. */
 			input_update(&input);
 			player_update(&player, &level, input, &level_id);
+			/* Y offset. */
+			if (input_is_pressed(input, K_CAM_UP) && y_offset < DRAW_OFFSET_Y_MAX)
+				y_offset += DRAW_OFFSET_Y_STEP;
+			if (input_is_pressed(input, K_CAM_DOWN) && y_offset > DRAW_OFFSET_Y_MIN)
+				y_offset -= DRAW_OFFSET_Y_STEP;
 		}
-		/* Calculate y offset ("camera"). */
-		const i16 y_offset = ((f32)player.pos.y / (f32)LEVEL_HEIGHT_PX) *
-		                     (DHEIGHT - LEVEL_HEIGHT_PX);
 		/* Draw. */
 		dclear(C_BLACK);
 		level_draw(level, y_offset);