137 lines
4.4 KiB
Java
137 lines
4.4 KiB
Java
package de.trac.spherical.rendering;
|
|
|
|
import android.content.Context;
|
|
import android.graphics.Bitmap;
|
|
import android.hardware.Sensor;
|
|
import android.hardware.SensorEvent;
|
|
import android.hardware.SensorEventListener;
|
|
import android.hardware.SensorManager;
|
|
import android.opengl.GLSurfaceView;
|
|
import android.opengl.Matrix;
|
|
import android.os.Build;
|
|
import android.view.MotionEvent;
|
|
|
|
/**
|
|
* This SurfaceView implementation is the glue between the PhotoSphereRenderer and any input event.
|
|
*/
|
|
public class PhotoSphereSurfaceView extends GLSurfaceView implements SensorEventListener {
|
|
|
|
public static boolean USE_TOUCH = false; // TODO: determine dynamically
|
|
|
|
// The actual rotation matrix determined by user input.
|
|
private final float rotationMatrix [] = new float[16];
|
|
|
|
// These vectors Are used for ray determination.
|
|
private final float rayStart [] = new float[4];
|
|
private final float rayDirection [] = new float[4];
|
|
|
|
// The renderer used by this view.
|
|
private PhotoSphereRenderer renderer;
|
|
|
|
/**
|
|
* Constructor. Initializes Renderer.
|
|
* @param context application context
|
|
*/
|
|
public PhotoSphereSurfaceView(Context context) {
|
|
super(context);
|
|
|
|
// Initialize transformation matrix.
|
|
Matrix.setIdentityM(rotationMatrix, 0);
|
|
|
|
// Initialize sensors.
|
|
SensorManager manager = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
|
|
Sensor sensor;
|
|
if (Build.VERSION.SDK_INT >= 18) {
|
|
sensor = manager.getSensorList(Sensor.TYPE_GAME_ROTATION_VECTOR).get(0);
|
|
} else {
|
|
sensor = manager.getSensorList(Sensor.TYPE_ROTATION_VECTOR).get(0);
|
|
}
|
|
manager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_GAME);
|
|
|
|
// Initialize renderer.
|
|
renderer = new PhotoSphereRenderer(this);
|
|
}
|
|
|
|
@Override
|
|
public boolean onTouchEvent(MotionEvent event) {
|
|
|
|
if(!USE_TOUCH)
|
|
return true;
|
|
|
|
switch (event.getAction()) {
|
|
case MotionEvent.ACTION_MOVE:
|
|
|
|
// Retrieve ray in world space.
|
|
renderer.getRay(event.getX(), event.getY(), rayStart, rayDirection);
|
|
|
|
// Solve quadric equation.
|
|
float a = 0.0f, b = 0.0f, c = 0.0f;
|
|
for(int i=0; i<3; i++) {
|
|
a += rayDirection[i] * rayDirection[i];
|
|
b += rayDirection[i] * 2.0f * (rayStart[i]); // Sphere center at origin.
|
|
c += rayStart[i]*rayStart[i];
|
|
}
|
|
c -= PhotoSphereRenderer.SPHERE_RADIUS*PhotoSphereRenderer.SPHERE_RADIUS;
|
|
float D = b*b-4.0f*a*c;
|
|
|
|
// Since the conditions are
|
|
if(D < 0) {
|
|
throw new RuntimeException("Ray must intersect with sphere, check camera position");
|
|
}
|
|
|
|
D = (float) Math.sqrt(D);
|
|
|
|
// Calculate intersection point p.
|
|
float t = -0.5f*(b+D)/a;
|
|
float px = rayStart[0] + t*rayDirection[0];
|
|
float py = rayStart[1] + t*rayDirection[1];
|
|
float pz = rayStart[2] + t*rayDirection[2];
|
|
|
|
// Calculate angles.
|
|
//float angleX = (float) Math.toDegrees(Math.atan2(py, px));
|
|
//float angleY = (float) Math.toDegrees(Math.acos(pz/Matrix.length(px, py, pz)));
|
|
|
|
synchronized (rotationMatrix) {
|
|
Matrix.setLookAtM(rotationMatrix, 0, 0.0f, 0.0f, 0.0f, px, py, pz, 1.0f, 0.0f, 0.0f);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
@Override
|
|
public void onAccuracyChanged(Sensor s, int arg1) {
|
|
// unused
|
|
}
|
|
|
|
@Override
|
|
public void onSensorChanged(SensorEvent event) {
|
|
|
|
if(USE_TOUCH)
|
|
return;
|
|
|
|
synchronized (rotationMatrix) {
|
|
SensorManager.getRotationMatrixFromVector(rotationMatrix, event.values);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a matrix representing the devices rotation.
|
|
* This function is thread safe.
|
|
* @return rotation matrix according to device rotation
|
|
*/
|
|
public float [] getRotationMatrix() {
|
|
synchronized (rotationMatrix) {
|
|
return rotationMatrix;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the bitmap to be rendered by the internal renderer.
|
|
* @param bitmap bitmap to be rendered
|
|
*/
|
|
public void setBitmap(Bitmap bitmap) {
|
|
renderer.requestBitmapUpload(bitmap);
|
|
}
|
|
}
|