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107 lines
4.2 KiB
107 lines
4.2 KiB
//using System;
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//using SkiaSharp;
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//namespace TheGameExtreme.view
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//{
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// public class TouchManipulationManager
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// {
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// public TouchManipulationMode Mode { set; get; }
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// //float Magnitude(SKPoint point)
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// //{
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// // return (float)Math.Sqrt(Math.Pow(point.X, 2) + Math.Pow(point.Y, 2));
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// //}
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// public SKMatrix OneFingerManipulate(SKPoint prevPoint, SKPoint newPoint, SKPoint pivotPoint)
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// {
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// if (Mode == TouchManipulationMode.None)
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// {
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// return SKMatrix.MakeIdentity();
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// }
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// SKMatrix touchMatrix = SKMatrix.MakeIdentity();
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// SKPoint delta = newPoint - prevPoint;
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// //if (Mode == TouchManipulationMode.ScaleDualRotate) // One-finger rotation
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// //{
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// // SKPoint oldVector = prevPoint - pivotPoint;
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// // SKPoint newVector = newPoint - pivotPoint;
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// // // Avoid rotation if fingers are too close to center
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// // if (Magnitude(newVector) > 25 && Magnitude(oldVector) > 25)
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// // {
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// // float prevAngle = (float)Math.Atan2(oldVector.Y, oldVector.X);
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// // float newAngle = (float)Math.Atan2(newVector.Y, newVector.X);
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// // // Calculate rotation matrix
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// // float angle = newAngle - prevAngle;
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// // touchMatrix = SKMatrix.MakeRotation(angle, pivotPoint.X, pivotPoint.Y);
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// // // Effectively rotate the old vector
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// // float magnitudeRatio = Magnitude(oldVector) / Magnitude(newVector);
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// // oldVector.X = magnitudeRatio * newVector.X;
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// // oldVector.Y = magnitudeRatio * newVector.Y;
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// // // Recalculate delta
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// // delta = newVector - oldVector;
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// // }
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// //}
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// // Multiply the rotation matrix by a translation matrix
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// SKMatrix.PostConcat(ref touchMatrix, SKMatrix.MakeTranslation(delta.X, delta.Y));
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// return touchMatrix;
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// }
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// public SKMatrix TwoFingerManipulate(SKPoint prevPoint, SKPoint newPoint, SKPoint pivotPoint)
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// {
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// SKMatrix touchMatrix = SKMatrix.MakeIdentity();
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// //SKPoint oldVector = prevPoint - pivotPoint;
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// //SKPoint newVector = newPoint - pivotPoint;
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// //if (Mode == TouchManipulationMode.ScaleRotate ||
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// // Mode == TouchManipulationMode.ScaleDualRotate)
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// //{
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// // // Find angles from pivot point to touch points
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// // float oldAngle = (float)Math.Atan2(oldVector.Y, oldVector.X);
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// // float newAngle = (float)Math.Atan2(newVector.Y, newVector.X);
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// // // Calculate rotation matrix
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// // float angle = newAngle - oldAngle;
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// // touchMatrix = SKMatrix.MakeRotation(angle, pivotPoint.X, pivotPoint.Y);
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// // // Effectively rotate the old vector
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// // float magnitudeRatio = Magnitude(oldVector) / Magnitude(newVector);
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// // oldVector.X = magnitudeRatio * newVector.X;
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// // oldVector.Y = magnitudeRatio * newVector.Y;
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// //}
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// float scaleX = 1;
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// float scaleY = 1;
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// //if (Mode == TouchManipulationMode.AnisotropicScale)
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// //{
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// // scaleX = newVector.X / oldVector.X;
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// // scaleY = newVector.Y / oldVector.Y;
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// //}
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// //else if (Mode == TouchManipulationMode.IsotropicScale ||
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// // Mode == TouchManipulationMode.ScaleRotate ||
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// // Mode == TouchManipulationMode.ScaleDualRotate)
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// //{
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// // scaleX = scaleY = Magnitude(newVector) / Magnitude(oldVector);
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// //}
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// if (!float.IsNaN(scaleX) && !float.IsInfinity(scaleX) &&
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// !float.IsNaN(scaleY) && !float.IsInfinity(scaleY))
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// {
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// SKMatrix.PostConcat(ref touchMatrix,
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// SKMatrix.MakeScale(scaleX, scaleY, pivotPoint.X, pivotPoint.Y));
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// }
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// return touchMatrix;
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// }
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// }
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//} |