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/*
* Copyright (C) 2011 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.testapp;
import android.util.Log;
import android.renderscript.Float3;
import com.android.scenegraph.*;
import com.android.scenegraph.CompoundTransform.RotateComponent;
import com.android.scenegraph.CompoundTransform.TranslateComponent;
public class TouchHandler {
private static String TAG = "TouchHandler";
float mLastX;
float mLastY;
float mRotateXValue;
float mRotateYValue;
Float3 mDistValue;
Float3 mPosValue;
CompoundTransform mCameraRig;
RotateComponent mRotateX;
RotateComponent mRotateY;
TranslateComponent mDist;
TranslateComponent mPosition;
Camera mCamera;
public void init(Scene scene) {
// Some initial values for camera position
mRotateXValue = -20;
mRotateYValue = 0;
mDistValue = new Float3(0, 0, 45);
mPosValue = new Float3(0, 4, 0);
// Make a camera transform we can manipulate
mCameraRig = scene.appendNewCompoundTransform();
mCameraRig.setName("CameraRig");
mPosition = mCameraRig.addTranslate("Position", mPosValue);
mRotateY = mCameraRig.addRotate("RotateY", new Float3(0, 1, 0), mRotateYValue);
mRotateX = mCameraRig.addRotate("RotateX", new Float3(1, 0, 0), mRotateXValue);
mDist = mCameraRig.addTranslate("Distance", mDistValue);
mCamera = scene.appendNewCamera();
mCamera.setTransform(mCameraRig);
}
public Camera getCamera() {
return mCamera;
}
public void onActionDown(float x, float y) {
mLastX = x;
mLastY = y;
}
public void onActionScale(float scale) {
if (mDist == null) {
return;
}
mDistValue.z *= 1.0f / scale;
mDistValue.z = Math.max(10.0f, Math.min(mDistValue.z, 150.0f));
mDist.setValue(mDistValue);
}
public void onActionMove(float x, float y) {
if (mRotateX == null) {
return;
}
float dx = mLastX - x;
float dy = mLastY - y;
if (Math.abs(dy) <= 2.0f) {
dy = 0.0f;
}
if (Math.abs(dx) <= 2.0f) {
dx = 0.0f;
}
mRotateYValue += dx * 0.25f;
mRotateYValue %= 360.0f;
mRotateXValue += dy * 0.25f;
mRotateXValue = Math.max(mRotateXValue , -80.0f);
mRotateXValue = Math.min(mRotateXValue , 0.0f);
mRotateX.setAngle(mRotateXValue);
mRotateY.setAngle(mRotateYValue);
mLastX = x;
mLastY = y;
}
}
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