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Revert "update demo to use boundary patch"

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This reverts commit 3f14f59ee6.
This commit is contained in:
Mike Reed
2009-10-28 17:04:38 -04:00
parent 3f14f59ee6
commit d22a3d977d
1 changed files with 78 additions and 65 deletions
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143
samples/ApiDemos/src/com/example/android/apis/graphics/BitmapMesh.java
View File

@@ -20,7 +20,6 @@ import com.example.android.apis.R;
import android.content.Context;
import android.graphics.*;
import android.graphics.utils.BoundaryPatch;
import android.os.Bundle;
import android.view.*;
import android.util.FloatMath;
@@ -32,83 +31,97 @@ public class BitmapMesh extends GraphicsActivity {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
private static final int ROWS = 16;
private static final int COLS = 16;
private static final int WIDTH = 20;
private static final int HEIGHT = 20;
private static final int COUNT = (WIDTH + 1) * (HEIGHT + 1);
private final Bitmap mBitmap;
private final float[] mVerts = new float[COUNT*2];
private final float[] mOrig = new float[COUNT*2];
private final Matrix mMatrix = new Matrix();
private final Matrix mInverse = new Matrix();
private BoundaryPatch mPatch;
private float[] mCubics;
private Paint mPaint0;
private Paint mPaint1;
private int mCurrIndex = -1;
private static void setXY(float[] array, int index, float x, float y) {
array[index*2 + 0] = x;
array[index*2 + 1] = y;
}
public SampleView(Context context) {
super(context);
setFocusable(true);
Bitmap bm = BitmapFactory.decodeResource(getResources(),
mBitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.beach);
mPatch = new BoundaryPatch();
mPatch.setTexture(bm);
float unit = 90;
mCubics = new float[] {
0, 0, 1, 0, 2, 0,
3, 0, 3, 1, 3, 2,
3, 3, 2, 3, 1, 3,
0, 3, 0, 2, 0, 1
};
for (int i = 0; i < 24; i++) {
mCubics[i] *= 90;
mCubics[i] += 20;
}
mPatch.setCubicBoundary(mCubics, 0, ROWS, COLS);
mPaint0 = new Paint();
mPaint0.setAntiAlias(true);
mPaint0.setStrokeWidth(12);
mPaint0.setStrokeCap(Paint.Cap.ROUND);
mPaint1 = new Paint(mPaint0);
mPaint1.setColor(0xFFFFFFFF);
mPaint1.setStrokeWidth(10);
}
@Override protected void onDraw(Canvas canvas) {
canvas.drawColor(0xFFCCCCCC);
mPatch.draw(canvas);
canvas.drawPoints(mCubics, mPaint0);
canvas.drawPoints(mCubics, mPaint1);
}
private int findPtIndex(float x, float y) {
final float tolerance = 25;
final float[] pts = mCubics;
for (int i = 0; i < (pts.length >> 1); i++) {
if (Math.abs(pts[i*2 + 0] - x) <= tolerance &&
Math.abs(pts[i*2 + 1] - y) <= tolerance) {
return i*2;
float w = mBitmap.getWidth();
float h = mBitmap.getHeight();
// construct our mesh
int index = 0;
for (int y = 0; y <= HEIGHT; y++) {
float fy = h * y / HEIGHT;
for (int x = 0; x <= WIDTH; x++) {
float fx = w * x / WIDTH;
setXY(mVerts, index, fx, fy);
setXY(mOrig, index, fx, fy);
index += 1;
}
}
mMatrix.setTranslate(10, 10);
mMatrix.invert(mInverse);
}
@Override protected void onDraw(Canvas canvas) {
canvas.drawColor(0xFFCCCCCC);
canvas.concat(mMatrix);
canvas.drawBitmapMesh(mBitmap, WIDTH, HEIGHT, mVerts, 0,
null, 0, null);
}
private void warp(float cx, float cy) {
final float K = 10000;
float[] src = mOrig;
float[] dst = mVerts;
for (int i = 0; i < COUNT*2; i += 2) {
float x = src[i+0];
float y = src[i+1];
float dx = cx - x;
float dy = cy - y;
float dd = dx*dx + dy*dy;
float d = FloatMath.sqrt(dd);
float pull = K / (dd + 0.000001f);
pull /= (d + 0.000001f);
// android.util.Log.d("skia", "index " + i + " dist=" + d + " pull=" + pull);
if (pull >= 1) {
dst[i+0] = cx;
dst[i+1] = cy;
} else {
dst[i+0] = x + dx * pull;
dst[i+1] = y + dy * pull;
}
}
return -1;
}
private int mLastWarpX = -9999; // don't match a touch coordinate
private int mLastWarpY;
@Override public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mCurrIndex = findPtIndex(x, y);
break;
case MotionEvent.ACTION_MOVE:
if (mCurrIndex >= 0) {
mCubics[mCurrIndex + 0] = x;
mCubics[mCurrIndex + 1] = y;
mPatch.setCubicBoundary(mCubics, 0, ROWS, COLS);
invalidate();
}
break;
float[] pt = { event.getX(), event.getY() };
mInverse.mapPoints(pt);
int x = (int)pt[0];
int y = (int)pt[1];
if (mLastWarpX != x || mLastWarpY != y) {
mLastWarpX = x;
mLastWarpY = y;
warp(pt[0], pt[1]);
invalidate();
}
return true;
}