CODEWITHSUNDEEP
javaandroid3dandroid-canvas
Ruuhkis
Ruuhkis

Reputation: 1934

Android rotating bitmap around its center

I am trying to rotate regular bitmap around X, Y and Z axis using canvas and matrix. I could use OpenGL but I think it would be overkill to achieve such a simple effect as I am pretty sure this is possible using just canvas, bitmap and matrix.

I tried using camera and its rotateX, rotateY and rotateZ method and then applying that matrix to canvas but for some reason I can get it to rotate the bitmap around it center!

I can't find method to change the rotate origin so I decided to translate the camera so its at center of bitmap and afterwards translate it back, but whatever I try the bitmap doesn't get translated by its center...image

            camera.save();

            camera.translate(-(team.getWidth() / 2), (team.getHeight() / 2), 0f);

            rotateY += 1f;

            camera.rotateY(rotateY);

            camera.translate((team.getWidth() / 2), -(team.getHeight() / 2), 0f);

            camera.applyToCanvas(canvas);

            camera.restore();

            /* code that has nothing to do with this..(fading) */

            canvas.drawBitmap(team, null, rect, paint);

Upvotes: 3

Views: 2132

Answers (1)

Dusean Singh
Dusean Singh

Reputation: 1504

Rotate3DAnimation is the answer for you. Here is the class

And here is the tutorial too: Tutorial of 3D flip

Upvotes: 2

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