diff --git a/renderarea.cpp b/renderarea.cpp
index 9f7a2a7..6c242b8 100644
--- a/renderarea.cpp
+++ b/renderarea.cpp
@@ -11,23 +11,34 @@ RenderArea::RenderArea(QWidget *parent) :
 }
 
 QPointF RenderArea::ComputeAstroid(double t){
-	double cos_t{cos(t)},sin_t{sin(t)},x{2*cos_t*cos_t*cos_t},y{2*sin_t*sin_t*sin_t};
-	return QPointF{x,y};
+	return QPointF{
+		2*pow(cos(t),3),
+		2*pow(sin(t),3)
+	};
 }
 
 QPointF RenderArea::ComputeCycloid(double t)
 {
-
+	return QPointF{
+		1.5 * (1 - cos(t)),
+		1.5 * (t - sin(t))
+	};
 }
 
 QPointF RenderArea::ComputeHuygens(double t)
 {
-
+	return QPointF{
+		4 * (3 * cos(t) - cos(3 * t)),
+		4 * (3 * sin(t) - sin(3 * t))
+	};
 }
 
 QPointF RenderArea::ComputeHypo(double t)
 {
-
+	return QPointF{
+		1.5 * (2 * cos(t) + cos(2 * t)),
+		1.5 * (2 * sin(t) - sin(2 * t))
+	};
 }
 
 QSize RenderArea::minimumSizeHint() const
@@ -70,16 +81,22 @@ void RenderArea::OnShapeChanged()
 		case Astroid:
 			mScale=50;
 			mIntervalLenght=2*M_PI;
-			mStepCount=256;
+			mStepCount=512;
 		break;
 		case Cycloid:
-
+			mScale=10;
+			mIntervalLenght=6*M_PI;
+			mStepCount=128;
 		break;
 		case HuygensCycloid:
-
+			mScale=10;
+			mIntervalLenght=4*M_PI;
+			mStepCount=512;
 		break;
 		case HypoCycloid:
-
+			mScale=50;
+			mIntervalLenght=2*M_PI;
+			mStepCount=256;
 		break;
 		default:
 		break;