| /* |
| |
| 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.dom.anim.AnimationTarget; |
| |
| /** |
| * A point value in the animation system from a motion animation. |
| * |
| * @author <a href="mailto:cam%40mcc%2eid%2eau">Cameron McCormack</a> |
| * @version $Id$ |
| */ |
| public class AnimatableMotionPointValue extends AnimatableValue { |
| |
| /** |
| * The x coordinate. |
| */ |
| protected float x; |
| |
| /** |
| * The y coordinate. |
| */ |
| protected float y; |
| |
| /** |
| * The rotation angle in radians. |
| */ |
| protected float angle; |
| |
| /** |
| * Creates a new, uninitialized AnimatableMotionPointValue. |
| */ |
| protected AnimatableMotionPointValue(AnimationTarget target) { |
| super(target); |
| } |
| |
| /** |
| * Creates a new AnimatableMotionPointValue with one x. |
| */ |
| public AnimatableMotionPointValue(AnimationTarget target, float x, float y, |
| float angle) { |
| super(target); |
| this.x = x; |
| this.y = y; |
| this.angle = angle; |
| } |
| |
| /** |
| * Performs interpolation to the given value. |
| */ |
| public AnimatableValue interpolate(AnimatableValue result, |
| AnimatableValue to, |
| float interpolation, |
| AnimatableValue accumulation, |
| int multiplier) { |
| AnimatableMotionPointValue res; |
| if (result == null) { |
| res = new AnimatableMotionPointValue(target); |
| } else { |
| res = (AnimatableMotionPointValue) result; |
| } |
| |
| float newX = x, newY = y, newAngle = angle; |
| int angleCount = 1; |
| |
| if (to != null) { |
| AnimatableMotionPointValue toValue = |
| (AnimatableMotionPointValue) to; |
| newX += interpolation * (toValue.x - x); |
| newY += interpolation * (toValue.y - y); |
| newAngle += toValue.angle; |
| angleCount++; |
| } |
| if (accumulation != null && multiplier != 0) { |
| AnimatableMotionPointValue accValue = |
| (AnimatableMotionPointValue) accumulation; |
| newX += multiplier * accValue.x; |
| newY += multiplier * accValue.y; |
| newAngle += accValue.angle; |
| angleCount++; |
| } |
| newAngle /= angleCount; |
| |
| if (res.x != newX || res.y != newY || res.angle != newAngle) { |
| res.x = newX; |
| res.y = newY; |
| res.angle = newAngle; |
| res.hasChanged = true; |
| } |
| return res; |
| } |
| |
| /** |
| * Returns the x coordinate. |
| */ |
| public float getX() { |
| return x; |
| } |
| |
| /** |
| * Returns the y coordinate. |
| */ |
| public float getY() { |
| return y; |
| } |
| |
| /** |
| * Returns the rotation angle. |
| */ |
| public float getAngle() { |
| return angle; |
| } |
| |
| /** |
| * Returns whether two values of this type can have their distance |
| * computed, as needed by paced animation. |
| */ |
| public boolean canPace() { |
| return true; |
| } |
| |
| /** |
| * Returns the absolute distance between this value and the specified other |
| * value. |
| */ |
| public float distanceTo(AnimatableValue other) { |
| AnimatableMotionPointValue o = (AnimatableMotionPointValue) other; |
| float dx = x - o.x; |
| float dy = y - o.y; |
| return (float) Math.sqrt(dx * dx + dy * dy); |
| } |
| |
| /** |
| * Returns a zero value of this AnimatableValue's type. |
| */ |
| public AnimatableValue getZeroValue() { |
| return new AnimatableMotionPointValue(target, 0f, 0f, 0f); |
| } |
| |
| /** |
| * Returns a string representation of this object. |
| */ |
| public String toStringRep() { |
| StringBuffer sb = new StringBuffer(); |
| sb.append(formatNumber(x)); |
| sb.append(','); |
| sb.append(formatNumber(y)); |
| sb.append(','); |
| sb.append(formatNumber(angle)); |
| sb.append("rad"); |
| return sb.toString(); |
| } |
| } |