X-Git-Url: http://git.localhorst.tv/?p=space.git;a=blobdiff_plain;f=src%2Fgraphics%2FCamera.h;h=e40b051bc64d78c18479fdbcac6f276049a0e830;hp=10699f097e2f5e6d9ca38892bd5d78a3aa5bff7e;hb=2d0a41dc0a53915153ceccda914d59affd388864;hpb=3f4f8a92f64df08119a40da4d196b3e92ecdc637

diff --git a/src/graphics/Camera.h b/src/graphics/Camera.h
index 10699f0..e40b051 100644
--- a/src/graphics/Camera.h
+++ b/src/graphics/Camera.h
@@ -12,16 +12,37 @@ public:
 	Camera(int w, int h, const Vector<float> &);
 
 public:
+	void SetTarget(const Vector<float> &t) { target = &t; }
+	void SetZoom(float z) { zoom = z; }
+
 	void Resize(int w, int h);
+	void Update(float deltaT);
+
+	void DoubleZoom();
+	void HalfZoom();
 
-	Vector<float> Offset() {
-		return -(*target - offset);
+	Vector<int> ToScreen(Vector<float> v) const {
+		return Vector<int>(OffsetOf(v));
+	}
+	Vector<float> OffsetOf(Vector<float> v) const {
+		return ToScale(v - *target) + offset;
+	}
+	Vector<float> ToScale(Vector<float> v) const {
+		if (zoom == 0) {
+			return v;
+		} else if (zoom > 0) {
+			return v * float(1 << zoom);
+		} else {
+			return v / float(1 << -zoom);
+		}
 	}
 
 private:
 	const Vector<float> *target;
 	Vector<float> offset;
 
+	int zoom;
+
 };
 
 }