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fix:直线拉直及端点吸附

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2025-06-19 14:30:24 +08:00
parent 912c1b91e4
commit 25b52def92
4 changed files with 41 additions and 22 deletions
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Ink Canvas/MainWindow_cs/MW_SettingsToLoad.cs
+3 -2
View File
@@ -519,6 +519,8 @@ namespace Ink_Canvas {
// 初始化直线自动拉直相关设置
ToggleSwitchAutoStraightenLine.IsOn = Settings.Canvas.AutoStraightenLine;
AutoStraightenLineThresholdSlider.Value = Settings.Canvas.AutoStraightenLineThreshold;
// 直线拉直灵敏度也在这里初始化，即使它存储在InkToShape中
LineStraightenSensitivitySlider.Value = Settings.InkToShape.LineStraightenSensitivity;
// 初始化直线端点吸附相关设置
ToggleSwitchLineEndpointSnapping.IsOn = Settings.Canvas.LineEndpointSnapping;
@@ -588,8 +590,7 @@ namespace Ink_Canvas {
ToggleCheckboxEnableInkToShapeRounded.IsChecked = Settings.InkToShape.IsInkToShapeRounded;
// 初始化直线拉直灵敏度
LineStraightenSensitivitySlider.Value = Settings.InkToShape.LineStraightenSensitivity;
// 直线拉直灵敏度在Canvas部分已经初始化，这里不再重复
} else {
Settings.InkToShape = new InkToShape();
}
Ink Canvas/MainWindow_cs/MW_SimulatePressure&InkToShape.cs
+36 -20
View File
@@ -13,7 +13,6 @@ namespace Ink_Canvas {
public partial class MainWindow : Window {
private StrokeCollection newStrokes = new StrokeCollection();
private List<Circle> circles = new List<Circle>();
private const double SNAP_THRESHOLD = 15.0; // Distance threshold for endpoint snapping
private const double LINE_STRAIGHTEN_THRESHOLD = 0.10; // 降低阈值，让直线检测更严格
private void inkCanvas_StrokeCollected(object sender, InkCanvasStrokeCollectedEventArgs e) {
@@ -120,25 +119,34 @@ namespace Ink_Canvas {
// Apply line straightening and endpoint snapping if ink-to-shape is enabled
if (Settings.InkToShape.IsInkToShapeEnabled) {
// Check if this stroke could be a straight line
if (IsPotentialStraightLine(e.Stroke)) {
// 检查是否启用了直线自动拉直功能
if (Settings.Canvas.AutoStraightenLine && IsPotentialStraightLine(e.Stroke)) {
// Get start and end points of the stroke
Point startPoint = e.Stroke.StylusPoints[0].ToPoint();
Point endPoint = e.Stroke.StylusPoints[e.Stroke.StylusPoints.Count - 1].ToPoint();
// Try to snap endpoints to existing strokes
// 端点吸附和直线拉直完全分离处理
bool snapped = false;
if (Settings.InkToShape.IsInkToShapeRectangle || Settings.InkToShape.IsInkToShapeTriangle) {
Point[] snappedPoints = GetSnappedEndpoints(startPoint, endPoint);
if (snappedPoints != null) {
startPoint = snappedPoints[0];
endPoint = snappedPoints[1];
snapped = true;
// 只有在启用端点吸附时才尝试吸附
if (Settings.Canvas.LineEndpointSnapping) {
// 只有在启用了形状识别（矩形或三角形）时才执行端点吸附
if (Settings.InkToShape.IsInkToShapeRectangle || Settings.InkToShape.IsInkToShapeTriangle) {
Point[] snappedPoints = GetSnappedEndpoints(startPoint, endPoint);
if (snappedPoints != null) {
startPoint = snappedPoints[0];
endPoint = snappedPoints[1];
snapped = true;
}
}
}
// Create straight line stroke
if (snapped || ShouldStraightenLine(e.Stroke)) {
// 独立检查是否应该拉直线条，无论端点吸附是否启用或成功
bool shouldStraighten = ShouldStraightenLine(e.Stroke);
// 如果满足任一条件（吸附成功或应该拉直），则创建直线
// 这里的条件是"或"关系，只要有一个条件满足就会创建直线
if (snapped || shouldStraighten) {
StylusPointCollection straightLinePoints = CreateStraightLine(startPoint, endPoint);
Stroke straightStroke = new Stroke(straightLinePoints) {
DrawingAttributes = inkCanvas.DefaultDrawingAttributes.Clone()
@@ -574,8 +582,8 @@ namespace Ink_Canvas {
Point end = stroke.StylusPoints.Last().ToPoint();
double lineLength = GetDistance(start, end);
// 线条必须足够长才考虑拉直，至少30像素
if (lineLength < 30)
// 线条必须足够长才考虑拉直，使用设置中的阈值
if (lineLength < Settings.Canvas.AutoStraightenLineThreshold)
return false;
// 获取用户设置的灵敏度值
@@ -620,8 +628,8 @@ namespace Ink_Canvas {
double maxDeviation = 0;
double lineLength = GetDistance(start, end);
// 如果线条太短，不进行拉直处理
if (lineLength < 50) {
// 如果线条太短，不进行拉直处理，使用设置中的阈值
if (lineLength < Settings.Canvas.AutoStraightenLineThreshold) {
return false;
}
@@ -732,11 +740,19 @@ namespace Ink_Canvas {
// New method: Attempts to snap endpoints to existing stroke endpoints
private Point[] GetSnappedEndpoints(Point start, Point end) {
// 如果端点吸附功能关闭，直接返回null
// 这里不再返回原始点，因为调用此方法的地方会判断返回值是否为null
if (!Settings.Canvas.LineEndpointSnapping)
return null;
bool startSnapped = false;
bool endSnapped = false;
Point snappedStart = start;
Point snappedEnd = end;
// 使用设置中的吸附距离阈值
double snapThreshold = Settings.Canvas.LineEndpointSnappingThreshold;
// Check all strokes in canvas for potential snap points
foreach (Stroke stroke in inkCanvas.Strokes) {
if (stroke.StylusPoints.Count == 0) continue;
@@ -747,10 +763,10 @@ namespace Ink_Canvas {
// Check if start point should snap to an endpoint
if (!startSnapped) {
if (GetDistance(start, strokeStart) < SNAP_THRESHOLD) {
if (GetDistance(start, strokeStart) < snapThreshold) {
snappedStart = strokeStart;
startSnapped = true;
} else if (GetDistance(start, strokeEnd) < SNAP_THRESHOLD) {
} else if (GetDistance(start, strokeEnd) < snapThreshold) {
snappedStart = strokeEnd;
startSnapped = true;
}
@@ -758,10 +774,10 @@ namespace Ink_Canvas {
// Check if end point should snap to an endpoint
if (!endSnapped) {
if (GetDistance(end, strokeStart) < SNAP_THRESHOLD) {
if (GetDistance(end, strokeStart) < snapThreshold) {
snappedEnd = strokeStart;
endSnapped = true;
} else if (GetDistance(end, strokeEnd) < SNAP_THRESHOLD) {
} else if (GetDistance(end, strokeEnd) < snapThreshold) {
snappedEnd = strokeEnd;
endSnapped = true;
}