fix debug view and smaller slab

build-and-run.sh

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+mvn install -pl weasis-dicom/weasis-dicom-viewer2d -am -DskipTests -q
+cd weasis-distributions && mvn clean package -DskipTests -q
+pkill -f "AppLauncher" || true; sleep 1
+rm -rf /tmp/weasis-build; mkdir -p /tmp/weasis-build
+unzip -o target/native-dist/weasis-native.zip -d /tmp/weasis-build/ > /dev/null
+export JAVA_HOME=$(brew --prefix openjdk)/libexec/openjdk.jdk/Contents/Home
+cd /tmp/weasis-build/bin-dist/weasis
+$JAVA_HOME/bin/java -cp weasis-launcher.jar:felix.jar org.weasis.launcher.AppLauncher >weasis-stdout.log 2>weasis-stderr.log &

docs/CURVED_MPR_IMPLEMENTATION_SPEC.md

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+# Curved Multi-Planar Reconstruction (cMPR) Feature Specification
+
+## Overview
+
+The Curved Multi-Planar Reconstruction (cMPR) feature enables users to draw a curved path through a 3D medical volume and generate a straightened panoramic view. This is particularly useful for visualizing curved anatomical structures such as blood vessels, airways, or bone surfaces in a single, easy-to-analyze 2D image.
+
+### Key Capabilities
+
+- **Curve Drawing**: Draw arbitrary curves in any MPR plane (axial, coronal, sagittal, or oblique)
+- **3D Path Definition**: Automatically converts 2D curve points to 3D volume coordinates
+- **Panoramic Generation**: Creates a straightened 2D view by sampling the volume along the curved path
+- **Configurable Parameters**: Adjust the width and sampling resolution of the panoramic view
+- **Real-time Updates**: Modify parameters and see updated panoramic views immediately
+- **Standard Image Tools**: All standard viewing tools (zoom, pan, window/level, measurements) work on the panoramic view
+
+## User Workflow
+
+### Creating a Curved MPR View
+
+1. **Open an MPR View**: Start with any standard MPR view of a 3D volume
+2. **Activate Curve Drawing**: Select the curved MPR drawing tool from the toolbar
+3. **Draw the Curve**: Click to place points along the desired anatomical path
+4. **Complete the Curve**: Double-click or right-click to finish drawing
+5. **Generate Panoramic View**: The curved MPR view automatically opens, showing the straightened panoramic view
+
+### Using the Panoramic View
+
+The panoramic view displays the volume data sampled perpendicular to the drawn curve:
+
+- **Horizontal Axis**: Represents distance along the curve path
+- **Vertical Axis**: Represents the width perpendicular to the curve
+- **Default Width**: 40mm (adjustable)
+- **Default Sampling**: Uses the volume's native resolution
+
+### Adjusting Parameters
+
+Users can modify the following parameters:
+
+- **Width**: Controls how far perpendicular to the curve the view extends (e.g., 20mm to 100mm)
+- **Sampling Step**: Controls the resolution along the curve (smaller steps = higher resolution)
+- Changes to these parameters regenerate the panoramic view in real-time
+
+## Feature Components
+
+### Curve Drawing Tool
+
+A specialized drawing tool that:
+- Allows freehand polyline drawing in any 2D MPR plane
+- Stores 2D screen coordinates that are converted to 3D volume coordinates
+- Provides context menu options for generating the curved MPR view
+- Validates that curves have sufficient points (minimum 2)
+
+### Path Definition
+
+The curve defines a 3D path through the volume:
+- Points are converted from 2D screen coordinates to 3D voxel coordinates
+- The path is stored in volume coordinate space for consistency
+- The source plane's orientation is preserved for proper perpendicular sampling
+
+### Panoramic Image Generation
+
+The panoramic view is generated by:
+
+1. **Curve Resampling**: The drawn curve is resampled at uniform intervals along its arc length
+2. **Perpendicular Sampling**: At each point along the curve, the volume is sampled perpendicular to the curve direction
+3. **Image Construction**: Samples are assembled into a 2D panoramic image
+4. **Metadata Assignment**: DICOM metadata is assigned for proper display and measurements
+
+### Sampling Algorithm
+
+The generation process uses the following approach:
+
+- **Arc-Length Parameterization**: Ensures uniform sampling along curved paths
+- **Tangent Computation**: Calculates the direction of the curve at each sample point
+- **Perpendicular Direction**: Computes a direction perpendicular to both the curve tangent and the original plane normal
+- **Volume Interpolation**: Uses trilinear interpolation for smooth sampling
+- **Boundary Handling**: Returns background values for samples outside the volume
+
+### Viewer Integration
+
+The curved MPR viewer integrates with the existing viewing system:
+
+- **Standard 2D View**: Uses the same 2D viewer infrastructure as other views
+- **Image Tools**: Supports zoom, pan, window/level adjustments
+- **Measurements**: Distance and angle measurements can be performed on the panoramic view
+- **Layout Options**: Opens in a separate viewer window or panel
+
+## Technical Characteristics
+
+### Coordinate Systems
+
+- **Input Coordinates**: 2D screen coordinates in the source MPR plane
+- **Working Coordinates**: 3D voxel coordinates in volume space
+- **Output Coordinates**: 2D image coordinates in the panoramic view
+
+### Image Properties
+
+- **Image Type**: Synthetic DICOM-like image
+- **Width**: Determined by curve length and sampling step
+- **Height**: Determined by the configurable width parameter
+- **Pixel Spacing**: Matches the volume's native resolution
+- **Intensity Range**: Matches the source volume's intensity range
+
+### Performance Considerations
+
+- **Default Parameters**: Chosen for good performance on typical volumes
+- **Resolution Limits**: Width and step parameters can be adjusted to balance quality and speed
+- **Caching**: Generated images are cached to avoid unnecessary regeneration
+- **Background Sampling**: Out-of-bounds samples are handled efficiently
+
+## Use Cases
+
+### Vessel Analysis
+
+- Visualize curved blood vessels in a single straightened view
+- Measure vessel diameter along its length
+- Assess stenosis or aneurysms along tortuous paths
+
+### Airway Evaluation
+
+- Examine bronchial tubes or other tubular structures
+- Follow airway paths through branching regions
+- Assess wall thickness or abnormalities
+
+### Bone Surface Analysis
+
+- Follow curved bone surfaces
+- Analyze cortical thickness along curved paths
+- Visualize fracture lines or deformities
+
+### General Path Following
+
+- Any scenario where a curved anatomical structure needs to be visualized linearly
+- Reduces cognitive load by straightening complex 3D paths
+- Facilitates comparison of different regions along the same structure
+
+## Limitations and Constraints
+
+### Curve Requirements
+
+- Minimum 2 points required
+- Curves cannot self-intersect (may produce unexpected results)
+- Very tight curves may produce distorted panoramic views
+
+### Volume Boundaries
+
+- Sampling outside the volume returns background values
+- Curves extending beyond volume edges will have truncated regions
+- Best results when curve stays within volume boundaries
+
+### Performance
+
+- Large widths and small sampling steps increase generation time
+- Very long curves may produce large panoramic images
+- Real-time updates may be delayed on slower systems for complex curves
+
+## Optional Enhancements
+
+Potential future improvements:
+
+- **Spline Smoothing**: Use Catmull-Rom or other spline interpolation for smoother curves
+- **Slab Thickness**: Add maximum/minimum/average intensity projection options
+- **Live Synchronization**: Update panoramic view when source MPR changes
+- **Curve Editing**: Modify existing curves with live preview
+- **Multi-threading**: Parallelize image generation for better performance
+- **Advanced Measurements**: Enable specialized measurements for curved structures