add ability to scale and transform ScalarFields

diff --git a/src/edu/berkeley/qfat/voxel/ScalarField.java b/src/edu/berkeley/qfat/voxel/ScalarField.java
index 7af8673..3365432 100644 (file)
--- a/src/edu/berkeley/qfat/voxel/ScalarField.java
+++ b/src/edu/berkeley/qfat/voxel/ScalarField.java
@@ -10,4 +10,13 @@ public interface ScalarField {
 
     public float getSample(Point p);
 
+    /** transform the scalar field in space */
+    public ScalarField transform(Matrix m);
+
+    /** add f to all scalar values */
+    public ScalarField plus(float f);
+
+    /** multiply all scalar values by f */
+    public ScalarField times(float f);
+
 }
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diff --git a/src/edu/berkeley/qfat/voxel/VoxelData.java b/src/edu/berkeley/qfat/voxel/VoxelData.java
index 98fffcc..9d446a4 100644 (file)
--- a/src/edu/berkeley/qfat/voxel/VoxelData.java
+++ b/src/edu/berkeley/qfat/voxel/VoxelData.java
@@ -18,4 +18,8 @@ public abstract class VoxelData implements ScalarField, HasBoundingBox {
     public abstract float getMinZ();
     public abstract int   getNumSamplesZ();
 
+    public ScalarField transform(Matrix m) { throw new RuntimeException("not implemented"); }
+    public ScalarField plus(float f)  { throw new RuntimeException("not implemented"); }
+    public ScalarField times(float f) { throw new RuntimeException("not implemented"); }
+
 }
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