Implement 3D slider state reading

include/cpp3ds/Input.h

@@ -3,6 +3,8 @@
 
 #define HID 0x10146000
 
+#define SLIDERSTATE 0x10144000
+
 namespace cpp3ds {
 
 	enum Button {
@@ -34,7 +36,10 @@ namespace cpp3ds {
 		int getHID();
 		int last_hid;
 	public:
+		static float slider;
 		static bool isDown(Button button);
+		static void update3DSlider();
+		static float get3DSlider(){ return Input::slider; }
 		// int bind(Button button, Event event);
 		// void unbind(int binding);
 		// void unbindAll();

src/Input.cpp

@@ -3,6 +3,8 @@
 
 namespace cpp3ds {
 
+	float Input::slider = 0;
+
 	int Input::getHID(){
 		last_hid = read_word(HID);
 		return last_hid;
@@ -12,4 +14,8 @@ namespace cpp3ds {
 		return (~read_word(HID) & button);
 	}
 
+	void Input::update3DSlider(){
+		Input::slider = (float)(read_word(SLIDERSTATE) & 0xFF) / 255;
+	}
+
 }

src/Stage.cpp

@@ -1,5 +1,6 @@
 #include <stddef.h>
 #include <cpp3ds/Stage.h>
+#include <cpp3ds/Input.h>
 #include <cpp3ds/utils.h>
 #include <cpp3ds/actors/Actor.h>
 
@@ -37,13 +38,16 @@ namespace cpp3ds {
 	void Stage::draw(Screen& screen, float x, float y, bool use3D, bool isLeftside) {
 		// Loop through and draw all actors on the stage
 		ActorNode* cur = actorTail;
+		x += this->x;
+		y += this->y;
 		while (cur != NULL) {
 			Actors::Actor& actor = *cur->actor;
 			if (use3D) {
-				float slider = 1.0f * actor.depth3d;
-				x = (isLeftside) ? x - slider : x + slider;
+				float slider = Input::get3DSlider() * actor.depth3d;
+				actor.draw(screen, (isLeftside) ? x-slider : x+slider, y, use3D, isLeftside);
+			} else {
+				actor.draw(screen, x, y, use3D, isLeftside);
 			}
-			actor.draw(screen, this->x + x, this->y + y, use3D, isLeftside);
 			cur = cur->prev;
 		}
 	}

src/TopScreen.cpp

@@ -1,4 +1,5 @@
 #include <cpp3ds/TopScreen.h>
+#include <cpp3ds/Input.h>
 #include <cpp3ds/Color.h>
 #include <cpp3ds/Drawable.h>
 
@@ -11,7 +12,7 @@ namespace cpp3ds {
 
 	void TopScreen::draw(Drawable& obj, float x, float y, bool use3D) {
 		if (use3D) {
-			float slider = 1.0f * obj.depth3d;
+			float slider = Input::get3DSlider() * obj.depth3d;
 			obj.draw(left_screen, x - slider, y, use3D, true);
 			obj.draw(right_screen, x + slider, y, use3D, false);
 		} else {