X-Git-Url: http://git.localhorst.tv/?p=space.git;a=blobdiff_plain;f=src%2Fgraphics%2FCamera.h;h=4d49cb618d6ece6ecb2c40635aa4c66a219231f5;hp=911f23601feacc59b287cf2734924470b20640c8;hb=08d0e47634e1632c96ebe3308535a86f5e625b40;hpb=11306935dbf7213d583222ce239985e1b3f180bf

diff --git a/src/graphics/Camera.h b/src/graphics/Camera.h
index 911f236..4d49cb6 100644
--- a/src/graphics/Camera.h
+++ b/src/graphics/Camera.h
@@ -15,6 +15,9 @@ public:
 	void SetTarget(const Vector<float> &t) { target = &t; }
 	void SetZoom(float z) { zoom = z; }
 
+	Vector<int> ScreenSize() const { return size; }
+	float Zoom() const { return zoom; }
+
 	void Resize(int w, int h);
 	void Update(float deltaT);
 
@@ -23,18 +26,27 @@ public:
 	void StartShrink();
 	void StopShrink();
 
+	/// transform v from world coords to screen coords
 	Vector<int> ToScreen(Vector<float> v) const {
-		return Vector<int>(OffsetOf(v)) + offset;
-	}
-	Vector<float> OffsetOf(Vector<float> v) const {
-		return ToScale(v - *target);
+		return Vector<int>(ToScale(v - *target)) + offset;
 	}
+	/// scale v to current zoom level
 	Vector<float> ToScale(Vector<float> v) const {
 		return v * zoom;
 	}
 
+	/// transform v from screen coords to world coords
+	Vector<float> FromScreen(Vector<int> v) const {
+		return FromScale(v - offset) + *target;
+	}
+	/// scale v back from current zoom level
+	Vector<float> FromScale(Vector<float> v) const {
+		return v / zoom;
+	}
+
 private:
 	const Vector<float> *target;
+	Vector<int> size;
 	Vector<int> offset;
 
 	float zoom;