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Diffstat (limited to 'src/com/android/gallery3d/filtershow/imageshow/GeometryMath.java')
-rw-r--r--src/com/android/gallery3d/filtershow/imageshow/GeometryMath.java143
1 files changed, 0 insertions, 143 deletions
diff --git a/src/com/android/gallery3d/filtershow/imageshow/GeometryMath.java b/src/com/android/gallery3d/filtershow/imageshow/GeometryMath.java
deleted file mode 100644
index 568dadfc3..000000000
--- a/src/com/android/gallery3d/filtershow/imageshow/GeometryMath.java
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.gallery3d.filtershow.imageshow;
-
-import android.graphics.Rect;
-import android.graphics.RectF;
-
-public class GeometryMath {
-
- // Math operations for 2d vectors
- public static float clamp(float i, float low, float high) {
- return Math.max(Math.min(i, high), low);
- }
-
- public static float[] lineIntersect(float[] line1, float[] line2) {
- float a0 = line1[0];
- float a1 = line1[1];
- float b0 = line1[2];
- float b1 = line1[3];
- float c0 = line2[0];
- float c1 = line2[1];
- float d0 = line2[2];
- float d1 = line2[3];
- float t0 = a0 - b0;
- float t1 = a1 - b1;
- float t2 = b0 - d0;
- float t3 = d1 - b1;
- float t4 = c0 - d0;
- float t5 = c1 - d1;
-
- float denom = t1 * t4 - t0 * t5;
- if (denom == 0)
- return null;
- float u = (t3 * t4 + t5 * t2) / denom;
- float[] intersect = {
- b0 + u * t0, b1 + u * t1
- };
- return intersect;
- }
-
- public static float[] shortestVectorFromPointToLine(float[] point, float[] line) {
- float x1 = line[0];
- float x2 = line[2];
- float y1 = line[1];
- float y2 = line[3];
- float xdelt = x2 - x1;
- float ydelt = y2 - y1;
- if (xdelt == 0 && ydelt == 0)
- return null;
- float u = ((point[0] - x1) * xdelt + (point[1] - y1) * ydelt)
- / (xdelt * xdelt + ydelt * ydelt);
- float[] ret = {
- (x1 + u * (x2 - x1)), (y1 + u * (y2 - y1))
- };
- float[] vec = {
- ret[0] - point[0], ret[1] - point[1]
- };
- return vec;
- }
-
- // A . B
- public static float dotProduct(float[] a, float[] b) {
- return a[0] * b[0] + a[1] * b[1];
- }
-
- public static float[] normalize(float[] a) {
- float length = (float) Math.sqrt(a[0] * a[0] + a[1] * a[1]);
- float[] b = {
- a[0] / length, a[1] / length
- };
- return b;
- }
-
- // A onto B
- public static float scalarProjection(float[] a, float[] b) {
- float length = (float) Math.sqrt(b[0] * b[0] + b[1] * b[1]);
- return dotProduct(a, b) / length;
- }
-
- public static float[] getVectorFromPoints(float[] point1, float[] point2) {
- float[] p = {
- point2[0] - point1[0], point2[1] - point1[1]
- };
- return p;
- }
-
- public static float[] getUnitVectorFromPoints(float[] point1, float[] point2) {
- float[] p = {
- point2[0] - point1[0], point2[1] - point1[1]
- };
- float length = (float) Math.sqrt(p[0] * p[0] + p[1] * p[1]);
- p[0] = p[0] / length;
- p[1] = p[1] / length;
- return p;
- }
-
- public static RectF scaleRect(RectF r, float scale) {
- return new RectF(r.left * scale, r.top * scale, r.right * scale, r.bottom * scale);
- }
-
- // A - B
- public static float[] vectorSubtract(float[] a, float[] b) {
- int len = a.length;
- if (len != b.length)
- return null;
- float[] ret = new float[len];
- for (int i = 0; i < len; i++) {
- ret[i] = a[i] - b[i];
- }
- return ret;
- }
-
- public static float vectorLength(float[] a) {
- return (float) Math.sqrt(a[0] * a[0] + a[1] * a[1]);
- }
-
- public static float scale(float oldWidth, float oldHeight, float newWidth, float newHeight) {
- if (oldHeight == 0 || oldWidth == 0)
- return 1;
- return Math.min(newWidth / oldWidth, newHeight / oldHeight);
- }
-
- public static Rect roundNearest(RectF r) {
- Rect q = new Rect(Math.round(r.left), Math.round(r.top), Math.round(r.right),
- Math.round(r.bottom));
- return q;
- }
-
-}