| /* |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You 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 org.apache.batik.anim.values; |
| |
| import org.apache.batik.anim.dom.AnimationTarget; |
| |
| import org.w3c.dom.svg.SVGAngle; |
| |
| /** |
| * An SVG angle value in the animation system. |
| * |
| * @author <a href="mailto:cam%40mcc%2eid%2eau">Cameron McCormack</a> |
| * @version $Id$ |
| */ |
| public class AnimatableAngleValue extends AnimatableNumberValue { |
| |
| /** |
| * The unit string representations. |
| */ |
| protected static final String[] UNITS = { |
| "", "", "deg", "rad", "grad" |
| }; |
| |
| /** |
| * The angle unit. |
| */ |
| protected short unit; |
| |
| /** |
| * Creates a new, uninitialized AnimatableAngleValue. |
| */ |
| public AnimatableAngleValue(AnimationTarget target) { |
| super(target); |
| } |
| |
| /** |
| * Creates a new AnimatableAngleValue. |
| */ |
| public AnimatableAngleValue(AnimationTarget target, float v, short unit) { |
| super(target, v); |
| this.unit = unit; |
| } |
| |
| /** |
| * Performs interpolation to the given value. |
| */ |
| public AnimatableValue interpolate(AnimatableValue result, |
| AnimatableValue to, |
| float interpolation, |
| AnimatableValue accumulation, |
| int multiplier) { |
| AnimatableAngleValue res; |
| if (result == null) { |
| res = new AnimatableAngleValue(target); |
| } else { |
| res = (AnimatableAngleValue) result; |
| } |
| |
| float v = value; |
| short u = unit; |
| if (to != null) { |
| AnimatableAngleValue toAngle = (AnimatableAngleValue) to; |
| if (toAngle.unit != u) { |
| v = rad(v, u); |
| v += interpolation * (rad(toAngle.value, toAngle.unit) - v); |
| u = SVGAngle.SVG_ANGLETYPE_RAD; |
| } else { |
| v += interpolation * (toAngle.value - v); |
| } |
| } |
| if (accumulation != null) { |
| AnimatableAngleValue accAngle = (AnimatableAngleValue) accumulation; |
| if (accAngle.unit != u) { |
| v += multiplier * rad(accAngle.value, accAngle.unit); |
| u = SVGAngle.SVG_ANGLETYPE_RAD; |
| } else { |
| v += multiplier * accAngle.value; |
| } |
| } |
| |
| if (res.value != v || res.unit != u) { |
| res.value = v; |
| res.unit = u; |
| res.hasChanged = true; |
| } |
| return res; |
| } |
| |
| /** |
| * Returns the angle unit. |
| */ |
| public short getUnit() { |
| return unit; |
| } |
| |
| /** |
| * Returns the absolute distance between this value and the specified other |
| * value. |
| */ |
| public float distanceTo(AnimatableValue other) { |
| AnimatableAngleValue o = (AnimatableAngleValue) other; |
| return Math.abs(rad(value, unit) - rad(o.value, o.unit)); |
| } |
| |
| /** |
| * Returns a zero value of this AnimatableValue's type. |
| */ |
| public AnimatableValue getZeroValue() { |
| return new AnimatableAngleValue |
| (target, 0, SVGAngle.SVG_ANGLETYPE_UNSPECIFIED); |
| } |
| |
| /** |
| * Returns the CSS text representation of the value. |
| */ |
| public String getCssText() { |
| return super.getCssText() + UNITS[unit]; |
| } |
| |
| /** |
| * Converts an angle value to radians. |
| */ |
| public static float rad(float v, short unit) { |
| switch (unit) { |
| case SVGAngle.SVG_ANGLETYPE_RAD: |
| return v; |
| case SVGAngle.SVG_ANGLETYPE_GRAD: |
| return (float) Math.PI * v / 200; |
| default: |
| return (float) Math.PI * v / 180; |
| } |
| } |
| } |