06.2026

plugins/fiji/sparseviewer/interp/Grid2D.java

@@ -0,0 +1,101 @@
+package sparseviewer.interp;
+
+public class Grid2D {
+
+    private final int width;
+    private final int height;
+
+    private final double xmin;
+    private final double xmax;
+    private final double ymin;
+    private final double ymax;
+
+    public Grid2D(int width, int height,
+                  double xmin, double xmax,
+                  double ymin, double ymax) {
+        this.width = width;
+        this.height = height;
+        this.xmin = xmin;
+        this.xmax = xmax;
+        this.ymin = ymin;
+        this.ymax = ymax;
+    }
+
+    public int getWidth() {
+        return width;
+    }
+
+    public int getHeight() {
+        return height;
+    }
+
+    public double getXMin() {
+        return xmin;
+    }
+
+    public double getXMax() {
+        return xmax;
+    }
+
+    public double getYMin() {
+        return ymin;
+    }
+
+    public double getYMax() {
+        return ymax;
+    }
+
+    public double xAt(int ix) {
+        if (width <= 1) {
+            return xmin;
+        }
+
+        return xmin + ix * (xmax - xmin) / (double) (width - 1);
+    }
+
+    public double yAt(int iy) {
+        if (height <= 1) {
+            return ymin;
+        }
+
+        return ymin + iy * (ymax - ymin) / (double) (height - 1);
+    }
+
+    public int xToIndex(double x) {
+        if (xmax == xmin) {
+            return 0;
+        }
+
+        double t = (x - xmin) / (xmax - xmin);
+        int ix = (int) Math.round(t * (width - 1));
+
+        if (ix < 0) {
+            ix = 0;
+        }
+
+        if (ix >= width) {
+            ix = width - 1;
+        }
+
+        return ix;
+    }
+
+    public int yToIndex(double y) {
+        if (ymax == ymin) {
+            return 0;
+        }
+
+        double t = (y - ymin) / (ymax - ymin);
+        int iy = (int) Math.round(t * (height - 1));
+
+        if (iy < 0) {
+            iy = 0;
+        }
+
+        if (iy >= height) {
+            iy = height - 1;
+        }
+
+        return iy;
+    }
+}