> I run my app on emulator, and currently have
> not tested it on real device.
The emulator is not, in any way, going to run the same speed as a real
device.
Run it on a real device and see what FPS you get. Or if you want, publish
an APK and someone here will run it I'm sure (I'll do it =P)
- Dan
On Wed, Jan 20, 2010 at 1:44 AM, Andre <andranik.abra...@gmail.com> wrote:
> Hi,
>
> Yesterday, I've changed my code, to work with the matrix more
> effectively...
>
> My GameEntity class now looks like this:
>
> ----------GAME ENTITY----------
>
> public class GameEntity {
> public Bitmap mBitmap;
> private Rect mBounds;
> private Matrix mMatrix;
> public int mWidth;
> public int mHeight;
> public boolean mAlive;
> public float mX, mY;
> public float mVelocityX, mVelocityY;
> public float mMoveAngle, mFaceAngle;
> public float mRotationVelocity;
>
> public GameEntity(Bitmap bitmap) {
> mBitmap = bitmap;
> mBounds = new Rect();
> mMatrix = new Matrix();
> mWidth = bitmap.getWidth();
> mHeight = bitmap.getHeight();
> mAlive = false;
> mX = 0.0f;
> mY = 0.0f;
> mVelocityX = 0.0f;
> mVelocityY = 0.0f;
> mMoveAngle = 0.0f;
> mFaceAngle = 0.0f;
> mRotationVelocity = 0.0f;
> }
>
> public void draw(Canvas canvas, float angle) {
> Matrix m = mMatrix;
> m.reset();
> m.postTranslate(mX - mWidth / 2, mY - mHeight / 2);
> m.postRotate(angle, mX, mY);
> canvas.drawBitmap(mBitmap, m, null);
> }
>
> public Rect getBounds() {
> mBounds.left = (int)(mX - mWidth / 2);
> mBounds.top = (int)(mY - mHeight / 2);
> mBounds.right = (int)(mX + mWidth / 2);
> mBounds.bottom = (int)(mY + mHeight / 2);
> return mBounds;
> }
> }
>
> And "draw" methods in GameView class:
>
> ----------GAME VIEW----------
>
> private void drawSpaceship(Canvas canvas) {
> mSpaceship.draw(canvas, mSpaceship.mFaceAngle);
> }
>
> private void drawAsteroids(Canvas canvas) {
> GameEntity[] asteroids = mAsteroids;
> GameEntity asteroid;
> for(int i = 0; i < MAX_ASTEROIDS; i++) {
> asteroid = asteroids[i];
> if(asteroid.mAlive) {
> asteroid.draw(canvas, asteroid.mMoveAngle);
> }
> }
> }
>
> private void drawBullets(Canvas canvas) {
> GameEntity[] bullets = mBullets;
> GameEntity bullet;
> for(int i = 0; i < MAX_BULLETS; i++) {
> bullet = bullets[i];
> if(bullet.mAlive) {
> bullet.draw(canvas, bullet.mMoveAngle + 90);
> }
> }
> }
>
> This gives me an extra 4-5 FPS, and now I have ~25 FPS.
> It worth to mention, that I run my app on emulator, and currently have
> not tested it on real device.
>
> I decide to go little further with testing and commented out
> m.postTranslate() method call, and got +4 FPS, after that I commented
> out m.postRotate(), and got +12-15 FPS, it seems that rotation (with
> pivot points) is very costly...
>
> Best Regards, Andre
>
> --
> You received this message because you are subscribed to the Google
> Groups "Android Developers" group.
> To post to this group, send email to android-developers@googlegroups.com
> To unsubscribe from this group, send email to
> android-developers+unsubscr...@googlegroups.com<android-developers%2bunsubscr...@googlegroups.com>
> For more options, visit this group at
> http://groups.google.com/group/android-developers?hl=en
>
--
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to android-developers@googlegroups.com
To unsubscribe from this group, send email to
android-developers+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en
