1 files changed, 0 insertions, 166 deletions
diff --git a/src/com/android/gallery3d/filtershow/filters/SplineMath.java b/src/com/android/gallery3d/filtershow/filters/SplineMath.java
deleted file mode 100644
index 5b12d0a61..000000000
--- a/src/com/android/gallery3d/filtershow/filters/SplineMath.java
+++ /dev/null
@@ -1,166 +0,0 @@
-package com.android.gallery3d.filtershow.filters;
-
-
-public class SplineMath {
-    double[][] mPoints = new double[6][2];
-    double[] mDerivatives;
-    SplineMath(int n) {
-        mPoints = new double[n][2];
-    }
-
-    public void setPoint(int index, double x, double y) {
-        mPoints[index][0] = x;
-        mPoints[index][1] = y;
-        mDerivatives = null;
-    }
-
-    public float[][] calculatetCurve(int n) {
-        float[][] curve = new float[n][2];
-        double[][] points = new double[mPoints.length][2];
-        for (int i = 0; i < mPoints.length; i++) {
-
-            points[i][0] = mPoints[i][0];
-            points[i][1] = mPoints[i][1];
-
-        }
-        double[] derivatives = solveSystem(points);
-        float start = (float) points[0][0];
-        float end = (float) (points[points.length - 1][0]);
-
-        curve[0][0] = (float) (points[0][0]);
-        curve[0][1] = (float) (points[0][1]);
-        int last = curve.length - 1;
-        curve[last][0] = (float) (points[points.length - 1][0]);
-        curve[last][1] = (float) (points[points.length - 1][1]);
-
-        for (int i = 0; i < curve.length; i++) {
-
-            double[] cur = null;
-            double[] next = null;
-            double x = start + i * (end - start) / (curve.length - 1);
-            int pivot = 0;
-            for (int j = 0; j < points.length - 1; j++) {
-                if (x >= points[j][0] && x <= points[j + 1][0]) {
-                    pivot = j;
-                }
-            }
-            cur = points[pivot];
-            next = points[pivot + 1];
-            if (x <= next[0]) {
-                double x1 = cur[0];
-                double x2 = next[0];
-                double y1 = cur[1];
-                double y2 = next[1];
-
-                // Use the second derivatives to apply the cubic spline
-                // equation:
-                double delta = (x2 - x1);
-                double delta2 = delta * delta;
-                double b = (x - x1) / delta;
-                double a = 1 - b;
-                double ta = a * y1;
-                double tb = b * y2;
-                double tc = (a * a * a - a) * derivatives[pivot];
-                double td = (b * b * b - b) * derivatives[pivot + 1];
-                double y = ta + tb + (delta2 / 6) * (tc + td);
-
-                curve[i][0] = (float) (x);
-                curve[i][1] = (float) (y);
-            } else {
-                curve[i][0] = (float) (next[0]);
-                curve[i][1] = (float) (next[1]);
-            }
-        }
-        return curve;
-    }
-
-    public double getValue(double x) {
-        double[] cur = null;
-        double[] next = null;
-        if (mDerivatives == null)
-            mDerivatives = solveSystem(mPoints);
-        int pivot = 0;
-        for (int j = 0; j < mPoints.length - 1; j++) {
-            pivot = j;
-            if (x <= mPoints[j][0]) {
-                break;
-            }
-        }
-        cur = mPoints[pivot];
-        next = mPoints[pivot + 1];
-        double x1 = cur[0];
-        double x2 = next[0];
-        double y1 = cur[1];
-        double y2 = next[1];
-
-        // Use the second derivatives to apply the cubic spline
-        // equation:
-        double delta = (x2 - x1);
-        double delta2 = delta * delta;
-        double b = (x - x1) / delta;
-        double a = 1 - b;
-        double ta = a * y1;
-        double tb = b * y2;
-        double tc = (a * a * a - a) * mDerivatives[pivot];
-        double td = (b * b * b - b) * mDerivatives[pivot + 1];
-        double y = ta + tb + (delta2 / 6) * (tc + td);
-
-        return y;
-
-    }
-
-    double[] solveSystem(double[][] points) {
-        int n = points.length;
-        double[][] system = new double[n][3];
-        double[] result = new double[n]; // d
-        double[] solution = new double[n]; // returned coefficients
-        system[0][1] = 1;
-        system[n - 1][1] = 1;
-        double d6 = 1.0 / 6.0;
-        double d3 = 1.0 / 3.0;
-
-        // let's create a tridiagonal matrix representing the
-        // system, and apply the TDMA algorithm to solve it
-        // (see http://en.wikipedia.org/wiki/Tridiagonal_matrix_algorithm)
-        for (int i = 1; i < n - 1; i++) {
-            double deltaPrevX = points[i][0] - points[i - 1][0];
-            double deltaX = points[i + 1][0] - points[i - 1][0];
-            double deltaNextX = points[i + 1][0] - points[i][0];
-            double deltaNextY = points[i + 1][1] - points[i][1];
-            double deltaPrevY = points[i][1] - points[i - 1][1];
-            system[i][0] = d6 * deltaPrevX; // a_i
-            system[i][1] = d3 * deltaX; // b_i
-            system[i][2] = d6 * deltaNextX; // c_i
-            result[i] = (deltaNextY / deltaNextX) - (deltaPrevY / deltaPrevX); // d_i
-        }
-
-        // Forward sweep
-        for (int i = 1; i < n; i++) {
-            // m = a_i/b_i-1
-            double m = system[i][0] / system[i - 1][1];
-            // b_i = b_i - m(c_i-1)
-            system[i][1] = system[i][1] - m * system[i - 1][2];
-            // d_i = d_i - m(d_i-1)
-            result[i] = result[i] - m * result[i - 1];
-        }
-
-        // Back substitution
-        solution[n - 1] = result[n - 1] / system[n - 1][1];
-        for (int i = n - 2; i >= 0; --i) {
-            solution[i] = (result[i] - system[i][2] * solution[i + 1]) / system[i][1];
-        }
-        return solution;
-    }
-
-    public static void main(String[] args) {
-        SplineMath s = new SplineMath(10);
-        for (int i = 0; i < 10; i++) {
-            s.setPoint(i, i, i);
-        }
-        float[][] curve = s.calculatetCurve(40);
-
-        for (int j = 0; j < curve.length; j++) {
-            System.out.println(curve[j][0] + "," + curve[j][1]);
-        }
-    }
-}