658 lines
24 KiB
Plaintext
658 lines
24 KiB
Plaintext
package com.novelbook.android.view.animation;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.ColorMatrix;
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import android.graphics.ColorMatrixColorFilter;
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import android.graphics.Matrix;
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import android.graphics.Paint;
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import android.graphics.Path;
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import android.graphics.PointF;
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import android.graphics.Region;
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import android.graphics.drawable.GradientDrawable;
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import android.os.Build;
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import android.util.Log;
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import android.widget.Scroller;
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public class SimulationAnimation extends AnimationProvider {
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private static final String TAG=SimulationAnimation.class.getSimpleName();
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private int mCornerX = 1; // 拖拽点对应的页脚
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private int mCornerY = 1;
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private Path mPath0;
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private Path mPath1;
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PointF mBezierStart1 = new PointF(); // 贝塞尔曲线起始点
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PointF mBezierControl1 = new PointF(); // 贝塞尔曲线控制点
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PointF mBeziervertex1 = new PointF(); // 贝塞尔曲线顶点
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PointF mBezierEnd1 = new PointF(); // 贝塞尔曲线结束点
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PointF mBezierStart2 = new PointF(); // 另一条贝塞尔曲线
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PointF mBezierControl2 = new PointF();
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PointF mBeziervertex2 = new PointF();
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PointF mBezierEnd2 = new PointF();
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float mMiddleX;
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float mMiddleY;
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float mDegrees;
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float mTouchToCornerDis;
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ColorMatrixColorFilter mColorMatrixFilter;
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Matrix mMatrix;
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float[] mMatrixArray = { 0, 0, 0, 0, 0, 0, 0, 0, 1.0f };
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boolean mIsRTandLB; // 是否属于右上左下
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private float mMaxLength ;
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int[] mBackShadowColors;// 背面颜色组
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int[] mFrontShadowColors;// 前面颜色组
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GradientDrawable mBackShadowDrawableLR; // 有阴影的GradientDrawable
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GradientDrawable mBackShadowDrawableRL;
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GradientDrawable mFolderShadowDrawableLR;
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GradientDrawable mFolderShadowDrawableRL;
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GradientDrawable mFrontShadowDrawableHBT;
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GradientDrawable mFrontShadowDrawableHTB;
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GradientDrawable mFrontShadowDrawableVLR;
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GradientDrawable mFrontShadowDrawableVRL;
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Paint mPaint;
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public SimulationAnimation(Bitmap mCurrentBitmap, Bitmap mNextBitmap, int width, int height) {
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super(mCurrentBitmap, mNextBitmap, width, height);
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mPath0 = new Path();
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mPath1 = new Path();
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mMaxLength = (float) Math.hypot(mScreenWidth, mScreenHeight);
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mPaint = new Paint();
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mPaint.setStyle(Paint.Style.FILL);
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createDrawable();
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ColorMatrix cm = new ColorMatrix();//设置颜色数组
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// float array[] = { 0.55f, 0, 0, 0, 80.0f,
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// 0, 0.55f, 0, 0, 80.0f,
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// 0, 0,0.55f, 0, 80.0f,
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// 0, 0, 0, 0.2f, 0 };
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float array[] = { 1, 0, 0, 0, 0,
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0, 1, 0, 0, 0,
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0, 0,1, 0, 0,
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0, 0, 0, 1, 0 };
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cm.set(array);
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mColorMatrixFilter = new ColorMatrixColorFilter(cm);
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mMatrix = new Matrix();
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mTouch.x = 0.01f; // 不让x,y为0,否则在点计算时会有问题
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mTouch.y = 0.01f;
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}
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@Override
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public void drawMove(Canvas canvas) {
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Log.d(TAG, "isMoveing drawMove: ");
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if (getDirection().equals(Direction.next)) {
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calcPoints();
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drawCurrentPageArea(canvas, mCurPageBitmap, mPath0);
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drawNextPageAreaAndShadow(canvas, mNextPageBitmap);
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// drawCurrentPageShadow(canvas); //去除阴影
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drawCurrentBackArea(canvas, mCurPageBitmap);
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}else{
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calcPoints();
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drawCurrentPageArea(canvas, mNextPageBitmap, mPath0);
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drawNextPageAreaAndShadow(canvas, mCurPageBitmap);
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drawCurrentPageShadow(canvas);
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drawCurrentBackArea(canvas, mNextPageBitmap);
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}
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}
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@Override
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public void drawStatic(Canvas canvas) {
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if (getCancel()){
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canvas.drawBitmap(mCurPageBitmap, 0, 0, null);
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}else {
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canvas.drawBitmap(mNextPageBitmap, 0, 0, null);
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}
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}
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@Override
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public void setCancel(boolean isCancel) {
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super.setCancel(isCancel);
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}
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@Override
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public void startAnimation(Scroller scroller) {
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int dx, dy;
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// dx 水平方向滑动的距离，负值会使滚动向左滚动
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// dy 垂直方向滑动的距离，负值会使滚动向上滚动
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if (getCancel()){
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if (mCornerX > 0 && getDirection().equals(Direction.next)) {
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dx = (int) (mScreenWidth - mTouch.x);
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} else {
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dx = -(int) mTouch.x;
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}
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if (!getDirection().equals(Direction.next)){
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dx = (int) - (mScreenWidth + mTouch.x);
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}
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if (mCornerY > 0) {
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dy = (int) (mScreenHeight - mTouch.y);
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} else {
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dy = - (int) mTouch.y; // 防止mTouch.y最终变为0
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}
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}else {
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if (mCornerX > 0 && getDirection().equals(Direction.next)) {
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dx = -(int) (mScreenWidth + mTouch.x);
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} else {
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dx = (int) (mScreenWidth - mTouch.x + mScreenWidth);
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}
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if (mCornerY > 0) {
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dy = (int) (mScreenHeight - mTouch.y);
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} else {
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dy = (int) (1 - mTouch.y); // 防止mTouch.y最终变为0
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}
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}
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scroller.startScroll((int) mTouch.x, (int) mTouch.y, dx, dy, duation);
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}
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@Override
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public void setDirection(Direction direction) {
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super.setDirection(direction);
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switch (direction){
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case pre:
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//上一页滑动不出现对角
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if (myStartX > mScreenWidth / 2){
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calcCornerXY(myStartX,mScreenHeight);
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}else{
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calcCornerXY(mScreenWidth - myStartX,mScreenHeight);
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}
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break;
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case next:
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if (mScreenWidth / 2 > myStartX){
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calcCornerXY(mScreenWidth - myStartX,myStartY);
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}
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break;
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}
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}
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@Override
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public void setStartPoint(float x, float y) {
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super.setStartPoint(x, y);
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calcCornerXY(x,y);
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}
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@Override
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public void setTouchPoint(float x, float y) {
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super.setTouchPoint(x, y);
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//触摸y中间位置吧y变成屏幕高度
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if ((myStartY > mScreenHeight / 3 && myStartY < mScreenHeight * 2 / 3) || getDirection().equals(Direction.pre)){
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mTouch.y = mScreenHeight;
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}
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if (myStartY > mScreenHeight / 3 && myStartY < mScreenHeight / 2 && getDirection().equals(Direction.next)){
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mTouch.y = 1;
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}
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}
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/**
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* 创建阴影的GradientDrawable
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*/
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private void createDrawable() {
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int[] color = { 0x333333, 0xb0333333 };
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mFolderShadowDrawableRL = new GradientDrawable(
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GradientDrawable.Orientation.RIGHT_LEFT, color);
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mFolderShadowDrawableRL
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.setGradientType(GradientDrawable.LINEAR_GRADIENT);
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mFolderShadowDrawableLR = new GradientDrawable(
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GradientDrawable.Orientation.LEFT_RIGHT, color);
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mFolderShadowDrawableLR
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.setGradientType(GradientDrawable.LINEAR_GRADIENT);
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mBackShadowColors = new int[] { 0xff111111, 0x111111 };
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mBackShadowDrawableRL = new GradientDrawable(
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GradientDrawable.Orientation.RIGHT_LEFT, mBackShadowColors);
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mBackShadowDrawableRL.setGradientType(GradientDrawable.LINEAR_GRADIENT);
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mBackShadowDrawableLR = new GradientDrawable(
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GradientDrawable.Orientation.LEFT_RIGHT, mBackShadowColors);
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mBackShadowDrawableLR.setGradientType(GradientDrawable.LINEAR_GRADIENT);
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mFrontShadowColors = new int[] { 0x80111111, 0x111111 };
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mFrontShadowDrawableVLR = new GradientDrawable(
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GradientDrawable.Orientation.LEFT_RIGHT, mFrontShadowColors);
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mFrontShadowDrawableVLR
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.setGradientType(GradientDrawable.LINEAR_GRADIENT);
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mFrontShadowDrawableVRL = new GradientDrawable(
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GradientDrawable.Orientation.RIGHT_LEFT, mFrontShadowColors);
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mFrontShadowDrawableVRL
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.setGradientType(GradientDrawable.LINEAR_GRADIENT);
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mFrontShadowDrawableHTB = new GradientDrawable(
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GradientDrawable.Orientation.TOP_BOTTOM, mFrontShadowColors);
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mFrontShadowDrawableHTB
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.setGradientType(GradientDrawable.LINEAR_GRADIENT);
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mFrontShadowDrawableHBT = new GradientDrawable(
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GradientDrawable.Orientation.BOTTOM_TOP, mFrontShadowColors);
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mFrontShadowDrawableHBT
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.setGradientType(GradientDrawable.LINEAR_GRADIENT);
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}
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/**
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* 是否能够拖动过去
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*
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* @return
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*/
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public boolean canDragOver() {
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if (mTouchToCornerDis > mScreenWidth / 10)
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return true;
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return false;
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}
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public boolean right() {
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if (mCornerX > -4)
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return false;
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return true;
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}
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/**
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* 绘制翻起页背面
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*
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* @param canvas
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* @param bitmap
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*/
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private void drawCurrentBackArea(Canvas canvas, Bitmap bitmap) {
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int i = (int) (mBezierStart1.x + mBezierControl1.x) / 2;
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float f1 = Math.abs(i - mBezierControl1.x);
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int i1 = (int) (mBezierStart2.y + mBezierControl2.y) / 2;
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float f2 = Math.abs(i1 - mBezierControl2.y);
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float f3 = Math.min(f1, f2);
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mPath1.reset();
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mPath1.moveTo(mBeziervertex2.x, mBeziervertex2.y);
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mPath1.lineTo(mBeziervertex1.x, mBeziervertex1.y);
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mPath1.lineTo(mBezierEnd1.x, mBezierEnd1.y);
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mPath1.lineTo(mTouch.x, mTouch.y);
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mPath1.lineTo(mBezierEnd2.x, mBezierEnd2.y);
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mPath1.close();
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GradientDrawable mFolderShadowDrawable;
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int left;
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int right;
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if (mIsRTandLB) {
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left = (int) (mBezierStart1.x - 1);
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right = (int) (mBezierStart1.x + f3 + 1);
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mFolderShadowDrawable = mFolderShadowDrawableLR;
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} else {
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left = (int) (mBezierStart1.x - f3 - 1);
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right = (int) (mBezierStart1.x + 1);
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mFolderShadowDrawable = mFolderShadowDrawableRL;
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}
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canvas.save();
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try {
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canvas.clipPath(mPath0);
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canvas.clipPath(mPath1, Region.Op.INTERSECT);
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} catch (Exception e) {
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}
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mPaint.setColorFilter(mColorMatrixFilter);
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float dis = (float) Math.hypot(mCornerX - mBezierControl1.x,
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mBezierControl2.y - mCornerY);
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float f8 = (mCornerX - mBezierControl1.x) / dis;
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float f9 = (mBezierControl2.y - mCornerY) / dis;
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mMatrixArray[0] = 1 - 2 * f9 * f9;
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mMatrixArray[1] = 2 * f8 * f9;
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mMatrixArray[3] = mMatrixArray[1];
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mMatrixArray[4] = 1 - 2 * f8 * f8;
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mMatrix.reset();
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mMatrix.setValues(mMatrixArray);
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mMatrix.preTranslate(-mBezierControl1.x, -mBezierControl1.y);
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mMatrix.postTranslate(mBezierControl1.x, mBezierControl1.y);
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// mPaint.setAlpha(0x90);
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canvas.drawBitmap(bitmap, mMatrix, mPaint);
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// canvas.drawBitmap(bitmap, mMatrix, null);
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mPaint.setColorFilter(null);
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canvas.rotate(mDegrees, mBezierStart1.x, mBezierStart1.y);
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mFolderShadowDrawable.setBounds(left, (int) mBezierStart1.y, right, (int) (mBezierStart1.y + mMaxLength));
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mFolderShadowDrawable.draw(canvas);
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canvas.restore();
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}
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/**
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* 绘制翻起页的阴影
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*
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* @param canvas
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*/
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public void drawCurrentPageShadow(Canvas canvas) {
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double degree;
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if (mIsRTandLB) {
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degree = Math.PI
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/ 4
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- Math.atan2(mBezierControl1.y - mTouch.y, mTouch.x
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- mBezierControl1.x);
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} else {
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degree = Math.PI
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/ 4
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- Math.atan2(mTouch.y - mBezierControl1.y, mTouch.x
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- mBezierControl1.x);
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}
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// 翻起页阴影顶点与touch点的距离
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double d1 = (float) 25 * 1.414 * Math.cos(degree);
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double d2 = (float) 25 * 1.414 * Math.sin(degree);
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float x = (float) (mTouch.x + d1);
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float y;
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if (mIsRTandLB) {
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y = (float) (mTouch.y + d2);
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} else {
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y = (float) (mTouch.y - d2);
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}
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mPath1.reset();
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mPath1.moveTo(x, y);
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mPath1.lineTo(mTouch.x, mTouch.y);
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mPath1.lineTo(mBezierControl1.x, mBezierControl1.y);
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mPath1.lineTo(mBezierStart1.x, mBezierStart1.y);
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mPath1.close();
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float rotateDegrees;
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canvas.save();
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try {
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canvas.clipPath(mPath0, Region.Op.XOR);
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canvas.clipPath(mPath1, Region.Op.INTERSECT);
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} catch (Exception e) {
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// TODO: handle exception
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}
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int leftx;
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int rightx;
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GradientDrawable mCurrentPageShadow;
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if (mIsRTandLB) {
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leftx = (int) (mBezierControl1.x);
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rightx = (int) mBezierControl1.x + 25;
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mCurrentPageShadow = mFrontShadowDrawableVLR;
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} else {
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leftx = (int) (mBezierControl1.x - 25);
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rightx = (int) mBezierControl1.x + 1;
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mCurrentPageShadow = mFrontShadowDrawableVRL;
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}
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rotateDegrees = (float) Math.toDegrees(Math.atan2(mTouch.x
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- mBezierControl1.x, mBezierControl1.y - mTouch.y));
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canvas.rotate(rotateDegrees, mBezierControl1.x, mBezierControl1.y);
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mCurrentPageShadow.setBounds(leftx,
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(int) (mBezierControl1.y - mMaxLength), rightx,
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(int) (mBezierControl1.y));
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mCurrentPageShadow.draw(canvas);
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canvas.restore();
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mPath1.reset();
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mPath1.moveTo(x, y);
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mPath1.lineTo(mTouch.x, mTouch.y);
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mPath1.lineTo(mBezierControl2.x, mBezierControl2.y);
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mPath1.lineTo(mBezierStart2.x, mBezierStart2.y);
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mPath1.close();
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canvas.save();
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try {
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canvas.clipPath(mPath0, Region.Op.XOR);
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canvas.clipPath(mPath1, Region.Op.INTERSECT);
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} catch (Exception e) {
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}
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if (mIsRTandLB) {
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leftx = (int) (mBezierControl2.y);
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rightx = (int) (mBezierControl2.y + 25);
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mCurrentPageShadow = mFrontShadowDrawableHTB;
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} else {
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leftx = (int) (mBezierControl2.y - 25);
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rightx = (int) (mBezierControl2.y + 1);
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mCurrentPageShadow = mFrontShadowDrawableHBT;
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}
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rotateDegrees = (float) Math.toDegrees(Math.atan2(mBezierControl2.y
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- mTouch.y, mBezierControl2.x - mTouch.x));
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canvas.rotate(rotateDegrees, mBezierControl2.x, mBezierControl2.y);
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float temp;
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if (mBezierControl2.y < 0)
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temp = mBezierControl2.y - mScreenHeight;
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else
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temp = mBezierControl2.y;
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int hmg = (int) Math.hypot(mBezierControl2.x, temp);
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if (hmg > mMaxLength)
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mCurrentPageShadow
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.setBounds((int) (mBezierControl2.x - 25) - hmg, leftx,
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(int) (mBezierControl2.x + mMaxLength) - hmg,
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rightx);
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else
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mCurrentPageShadow.setBounds(
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(int) (mBezierControl2.x - mMaxLength), leftx,
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(int) (mBezierControl2.x), rightx);
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// Log.i("hmg", "mBezierControl2.x " + mBezierControl2.x
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// + " mBezierControl2.y " + mBezierControl2.y);
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mCurrentPageShadow.draw(canvas);
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canvas.restore();
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}
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private void drawNextPageAreaAndShadow(Canvas canvas, Bitmap bitmap) {
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mPath1.reset();
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mPath1.moveTo(mBezierStart1.x, mBezierStart1.y);
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mPath1.lineTo(mBeziervertex1.x, mBeziervertex1.y);
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mPath1.lineTo(mBeziervertex2.x, mBeziervertex2.y);
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mPath1.lineTo(mBezierStart2.x, mBezierStart2.y);
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mPath1.lineTo(mCornerX, mCornerY);
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mPath1.close();
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mDegrees = (float) Math.toDegrees(Math.atan2(mBezierControl1.x
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- mCornerX, mBezierControl2.y - mCornerY));
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int leftx;
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int rightx;
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GradientDrawable mBackShadowDrawable;
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if (mIsRTandLB) { //左下及右上
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leftx = (int) (mBezierStart1.x);
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rightx = (int) (mBezierStart1.x + mTouchToCornerDis / 4);
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mBackShadowDrawable = mBackShadowDrawableLR;
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} else {
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leftx = (int) (mBezierStart1.x - mTouchToCornerDis / 4);
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rightx = (int) mBezierStart1.x;
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mBackShadowDrawable = mBackShadowDrawableRL;
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}
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canvas.save();
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try {
|
||
canvas.clipPath(mPath0);
|
||
canvas.clipPath(mPath1, Region.Op.INTERSECT);
|
||
} catch (Exception e) {
|
||
}
|
||
|
||
|
||
canvas.drawBitmap(bitmap, 0, 0, null);
|
||
canvas.rotate(mDegrees, mBezierStart1.x, mBezierStart1.y);
|
||
mBackShadowDrawable.setBounds(leftx, (int) mBezierStart1.y, rightx,
|
||
(int) (mMaxLength + mBezierStart1.y));//左上及右下角的xy坐标值,构成一个矩形
|
||
mBackShadowDrawable.draw(canvas);
|
||
canvas.restore();
|
||
}
|
||
|
||
private void drawCurrentPageArea(Canvas canvas, Bitmap bitmap, Path path) {
|
||
mPath0.reset();
|
||
mPath0.moveTo(mBezierStart1.x, mBezierStart1.y);
|
||
mPath0.quadTo(mBezierControl1.x, mBezierControl1.y, mBezierEnd1.x,
|
||
mBezierEnd1.y);
|
||
mPath0.lineTo(mTouch.x, mTouch.y);
|
||
mPath0.lineTo(mBezierEnd2.x, mBezierEnd2.y);
|
||
mPath0.quadTo(mBezierControl2.x, mBezierControl2.y, mBezierStart2.x,
|
||
mBezierStart2.y);
|
||
mPath0.lineTo(mCornerX, mCornerY);
|
||
mPath0.close();
|
||
|
||
canvas.save();
|
||
if(Build.VERSION.SDK_INT >= 26){
|
||
// canvas.clipPath(path); //将正面变空白了
|
||
}else {
|
||
// canvas.clipPath(path, Region.Op.XOR); //未试过，低版本手机上效果如何？
|
||
}
|
||
canvas.drawBitmap(bitmap, 0, 0, null);
|
||
try {
|
||
canvas.restore();
|
||
} catch (Exception e) {
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 计算拖拽点对应的拖拽脚
|
||
*
|
||
* @param x
|
||
* @param y
|
||
*/
|
||
public void calcCornerXY(float x, float y) {
|
||
// Log.i("hck", "PageWidget x:" + x + " y" + y);
|
||
if (x <= mScreenWidth / 2) {
|
||
mCornerX = 0;
|
||
}else {
|
||
mCornerX = mScreenWidth;
|
||
}
|
||
if (y <= mScreenHeight / 2) {
|
||
mCornerY = 0;
|
||
} else {
|
||
mCornerY = mScreenHeight;
|
||
}
|
||
|
||
if ((mCornerX == 0 && mCornerY == mScreenHeight)
|
||
|| (mCornerX == mScreenWidth && mCornerY == 0)) {
|
||
mIsRTandLB = true;
|
||
}else {
|
||
mIsRTandLB = false;
|
||
}
|
||
|
||
}
|
||
|
||
private void calcPoints() {
|
||
mMiddleX = (mTouch.x + mCornerX) / 2;
|
||
mMiddleY = (mTouch.y + mCornerY) / 2;
|
||
mBezierControl1.x = mMiddleX - (mCornerY - mMiddleY)
|
||
* (mCornerY - mMiddleY) / (mCornerX - mMiddleX);
|
||
mBezierControl1.y = mCornerY;
|
||
mBezierControl2.x = mCornerX;
|
||
// mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX)
|
||
// * (mCornerX - mMiddleX) / (mCornerY - mMiddleY);
|
||
|
||
float f4 = mCornerY-mMiddleY;
|
||
if (f4 == 0) {
|
||
mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX)
|
||
* (mCornerX - mMiddleX) / 0.1f;
|
||
// Log.d("PageWidget",""+f4);
|
||
}else {
|
||
mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX)
|
||
* (mCornerX - mMiddleX) / (mCornerY - mMiddleY);
|
||
// Log.d("PageWidget","没有进入if判断"+ mBezierControl2.y + "");
|
||
}
|
||
|
||
// Log.i("hmg", "mTouchX " + mTouch.x + " mTouchY " + mTouch.y);
|
||
// Log.i("hmg", "mBezierControl1.x " + mBezierControl1.x
|
||
// + " mBezierControl1.y " + mBezierControl1.y);
|
||
// Log.i("hmg", "mBezierControl2.x " + mBezierControl2.x
|
||
// + " mBezierControl2.y " + mBezierControl2.y);
|
||
|
||
mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x)
|
||
/ 2;
|
||
mBezierStart1.y = mCornerY;
|
||
|
||
// 当mBezierStart1.x < 0或者mBezierStart1.x > 480时
|
||
// 如果继续翻页，会出现BUG故在此限制
|
||
if (mTouch.x > 0 && mTouch.x < mScreenWidth) {
|
||
if (mBezierStart1.x < 0 || mBezierStart1.x > mScreenWidth) {
|
||
if (mBezierStart1.x < 0)
|
||
mBezierStart1.x = mScreenWidth - mBezierStart1.x;
|
||
|
||
float f1 = Math.abs(mCornerX - mTouch.x);
|
||
float f2 = mScreenWidth * f1 / mBezierStart1.x;
|
||
mTouch.x = Math.abs(mCornerX - f2);
|
||
|
||
float f3 = Math.abs(mCornerX - mTouch.x)
|
||
* Math.abs(mCornerY - mTouch.y) / f1;
|
||
mTouch.y = Math.abs(mCornerY - f3);
|
||
|
||
mMiddleX = (mTouch.x + mCornerX) / 2;
|
||
mMiddleY = (mTouch.y + mCornerY) / 2;
|
||
|
||
mBezierControl1.x = mMiddleX - (mCornerY - mMiddleY)
|
||
* (mCornerY - mMiddleY) / (mCornerX - mMiddleX);
|
||
mBezierControl1.y = mCornerY;
|
||
|
||
mBezierControl2.x = mCornerX;
|
||
// mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX)
|
||
// * (mCornerX - mMiddleX) / (mCornerY - mMiddleY);
|
||
|
||
float f5 = mCornerY-mMiddleY;
|
||
if (f5 == 0) {
|
||
mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX)
|
||
* (mCornerX - mMiddleX) / 0.1f;
|
||
}else {
|
||
mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX)
|
||
* (mCornerX - mMiddleX) / (mCornerY - mMiddleY);
|
||
// Log.d("PageWidget", mBezierControl2.y + "");
|
||
}
|
||
|
||
|
||
|
||
// Log.i("hmg", "mTouchX --> " + mTouch.x + " mTouchY--> "
|
||
// + mTouch.y);
|
||
// Log.i("hmg", "mBezierControl1.x-- " + mBezierControl1.x
|
||
// + " mBezierControl1.y -- " + mBezierControl1.y);
|
||
// Log.i("hmg", "mBezierControl2.x -- " + mBezierControl2.x
|
||
// + " mBezierControl2.y -- " + mBezierControl2.y);
|
||
mBezierStart1.x = mBezierControl1.x
|
||
- (mCornerX - mBezierControl1.x) / 2;
|
||
}
|
||
}
|
||
mBezierStart2.x = mCornerX;
|
||
mBezierStart2.y = mBezierControl2.y - (mCornerY - mBezierControl2.y)
|
||
/ 2;
|
||
|
||
mTouchToCornerDis = (float) Math.hypot((mTouch.x - mCornerX),
|
||
(mTouch.y - mCornerY));
|
||
|
||
mBezierEnd1 = getCross(mTouch, mBezierControl1, mBezierStart1,
|
||
mBezierStart2);
|
||
mBezierEnd2 = getCross(mTouch, mBezierControl2, mBezierStart1,
|
||
mBezierStart2);
|
||
|
||
// Log.i("hmg", "mBezierEnd1.x " + mBezierEnd1.x + " mBezierEnd1.y "
|
||
// + mBezierEnd1.y);
|
||
// Log.i("hmg", "mBezierEnd2.x " + mBezierEnd2.x + " mBezierEnd2.y "
|
||
// + mBezierEnd2.y);
|
||
|
||
/*
|
||
* mBeziervertex1.x 推导
|
||
* ((mBezierStart1.x+mBezierEnd1.x)/2+mBezierControl1.x)/2 化简等价于
|
||
* (mBezierStart1.x+ 2*mBezierControl1.x+mBezierEnd1.x) / 4
|
||
*/
|
||
mBeziervertex1.x = (mBezierStart1.x + 2 * mBezierControl1.x + mBezierEnd1.x) / 4;
|
||
mBeziervertex1.y = (2 * mBezierControl1.y + mBezierStart1.y + mBezierEnd1.y) / 4;
|
||
mBeziervertex2.x = (mBezierStart2.x + 2 * mBezierControl2.x + mBezierEnd2.x) / 4;
|
||
mBeziervertex2.y = (2 * mBezierControl2.y + mBezierStart2.y + mBezierEnd2.y) / 4;
|
||
}
|
||
|
||
/**
|
||
* 求解直线P1P2和直线P3P4的交点坐标
|
||
*
|
||
* @param P1
|
||
* @param P2
|
||
* @param P3
|
||
* @param P4
|
||
* @return
|
||
*/
|
||
public PointF getCross(PointF P1, PointF P2, PointF P3, PointF P4) {
|
||
PointF CrossP = new PointF();
|
||
// 二元函数通式： y=ax+b
|
||
float a1 = (P2.y - P1.y) / (P2.x - P1.x);
|
||
float b1 = ((P1.x * P2.y) - (P2.x * P1.y)) / (P1.x - P2.x);
|
||
|
||
float a2 = (P4.y - P3.y) / (P4.x - P3.x);
|
||
float b2 = ((P3.x * P4.y) - (P4.x * P3.y)) / (P3.x - P4.x);
|
||
CrossP.x = (b2 - b1) / (a1 - a2);
|
||
CrossP.y = a1 * CrossP.x + b1;
|
||
return CrossP;
|
||
}
|
||
}
|