Examples with Camera android.graphics.Camera used on opensource projects

Example 26 with Camera

use of android.graphics.Camera in project XobotOS by xamarin.

the class View method setCameraDistance.

/**
     * <p>Sets the distance along the Z axis (orthogonal to the X/Y plane on which
     * views are drawn) from the camera to this view. The camera's distance
     * affects 3D transformations, for instance rotations around the X and Y
     * axis. If the rotationX or rotationY properties are changed and this view is
     * large (more than half the size of the screen), it is recommended to always 
     * use a camera distance that's greater than the height (X axis rotation) or
     * the width (Y axis rotation) of this view.</p>
     * 
     * <p>The distance of the camera from the view plane can have an affect on the
     * perspective distortion of the view when it is rotated around the x or y axis.
     * For example, a large distance will result in a large viewing angle, and there
     * will not be much perspective distortion of the view as it rotates. A short
     * distance may cause much more perspective distortion upon rotation, and can 
     * also result in some drawing artifacts if the rotated view ends up partially
     * behind the camera (which is why the recommendation is to use a distance at
     * least as far as the size of the view, if the view is to be rotated.)</p>
     * 
     * <p>The distance is expressed in "depth pixels." The default distance depends
     * on the screen density. For instance, on a medium density display, the
     * default distance is 1280. On a high density display, the default distance
     * is 1920.</p>
     * 
     * <p>If you want to specify a distance that leads to visually consistent
     * results across various densities, use the following formula:</p>
     * <pre>
     * float scale = context.getResources().getDisplayMetrics().density;
     * view.setCameraDistance(distance * scale);
     * </pre>
     * 
     * <p>The density scale factor of a high density display is 1.5,
     * and 1920 = 1280 * 1.5.</p>
     * 
     * @param distance The distance in "depth pixels", if negative the opposite
     *        value is used
     * 
     * @see #setRotationX(float) 
     * @see #setRotationY(float) 
     */
public void setCameraDistance(float distance) {
    invalidateParentCaches();
    invalidate(false);
    ensureTransformationInfo();
    final float dpi = mResources.getDisplayMetrics().densityDpi;
    final TransformationInfo info = mTransformationInfo;
    if (info.mCamera == null) {
        info.mCamera = new Camera();
        info.matrix3D = new Matrix();
    }
    info.mCamera.setLocation(0.0f, 0.0f, -Math.abs(distance) / dpi);
    info.mMatrixDirty = true;
    invalidate(false);
}

Example 27 with Camera

use of android.graphics.Camera in project UltimateAndroid by cymcsg.

the class FancyCoverFlow method initialize.

private void initialize() {
    this.transformationCamera = new Camera();
    this.setSpacing(0);
}

Example 28 with Camera

use of android.graphics.Camera in project Notes by Elder-Wu.

the class AnimatorProxy method transformMatrix.

private void transformMatrix(Matrix m, View view) {
    final float w = view.getWidth();
    final float h = view.getHeight();
    final boolean hasPivot = mHasPivot;
    final float pX = hasPivot ? mPivotX : w / 2f;
    final float pY = hasPivot ? mPivotY : h / 2f;
    final float rX = mRotationX;
    final float rY = mRotationY;
    final float rZ = mRotationZ;
    if ((rX != 0) || (rY != 0) || (rZ != 0)) {
        final Camera camera = mCamera;
        camera.save();
        camera.rotateX(rX);
        camera.rotateY(rY);
        camera.rotateZ(-rZ);
        camera.getMatrix(m);
        camera.restore();
        m.preTranslate(-pX, -pY);
        m.postTranslate(pX, pY);
    }
    final float sX = mScaleX;
    final float sY = mScaleY;
    if ((sX != 1.0f) || (sY != 1.0f)) {
        m.postScale(sX, sY);
        final float sPX = -(pX / w) * ((sX * w) - w);
        final float sPY = -(pY / h) * ((sY * h) - h);
        m.postTranslate(sPX, sPY);
    }
    m.postTranslate(mTranslationX, mTranslationY);
}

Example 29 with Camera

use of android.graphics.Camera in project teaTime by ancfdy.

the class FlipAnimation method initialize.

@Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
    super.initialize(width, height, parentWidth, parentHeight);
    mCamera = new Camera();
}

Example 30 with Camera

use of android.graphics.Camera in project teaTime by ancfdy.

the class FlipAnimation method applyTransformation.

@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
    final float fromDegrees = mFromDegrees;
    float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);
    final float centerX = mCenterX;
    final float centerY = mCenterY;
    final Camera camera = mCamera;
    final Matrix matrix = t.getMatrix();
    camera.save();
    camera.rotateY(degrees);
    camera.getMatrix(matrix);
    camera.restore();
    matrix.preTranslate(-centerX, -centerY);
    matrix.postTranslate(centerX, centerY);
}