. Graphic rotation in development in the game in J2ME game:
1. The following methods are available in the sprite of MIDP2.0:
Void
SetTransform (Int Transform)
Sets The Transform for this Sprite.
TRANS_MIRROR Causes the Sprite to appear reflected about its vertical center. Static intTRANS_MIRROR_ROT180 Causes the Sprite to appear reflected about its vertical center and then rotated clockwise by 180 degrees. Static intTRANS_MIRROR_ROT270 Causes the Sprite to appear reflected about its vertical center and then rotated clockwise by 270 degrees. static intTRANS_MIRROR_ROT90 Causes the Sprite to appear reflected about its vertical center and then rotated clockwise by 90 degrees. static intTRANS_NONE No transform is applied to the Sprite. static intTRANS_ROT180 Causes the Sprite to appear rotated clockwise by 180 degrees. static intTRANS_ROT270 Causes the Sprite To Appear Rotated ClockWise By 270 DegRees. static intectrans_rot90
It seems to be a good method: graphics can be rotated, but look back, that is, no rotation of any angle, why?
Doesn't he do not support?
Discover: from seeing sprite.java source code:
The partial rotation is 180 degrees as follows:
Case TRANS_MIRROR_ROT180:
T_collisionRecty = SrcframeHeight -
CollisionRecty CollisionRecTheight;
t_collisionRectx = CollisionRectx;
t_collisionRectwidth = CollisionRectwidth;
T_collisionRecTheight = CollisionRecTheight;
// Width and Height Are As BEFORE
THIS.WIDTH = SRCFRAMEWIDTH;
THISHEIGHT = SrcframeHeight;
// the x-offset of the reference point from the top left corner
// Remains the same.
// Top Left Y-Co-Ordinate Changes
Break;
The corresponding PAINT method:
g.drawregion (SourceImage,
FramecoRDSX [Framesequence [SequenceIndeIndex]]
Framecoordsy [framesequence [sequenceindeindex]], SRCFRAMEWIDTH,
SrcframeHeight,
T_currentTransformation,
THIS.X,
THIS.Y,
Graphics.top | graphics.Left);
The method in MIDP / Graphics also has no definition of any angle.
This DrawRegion method is defined as follows: (PS This is a native interface, but did not see the generation .h file, it seems that he is left to others)
DrawRegion
Public Void Drawregion (Image SRC, INT X_SRC, INT Y_SRC, INT Width, Int Height, Int Transform, Int X_Dest, Int Y_Dest, Int Anchor) is not disappointing or not seeing more content, it is not a way. I think that Sprite provides a multi-frame drawing function, it may be a discharier program: Think about that if you really rotate, you can call it. You don't have to rotate this sprite settransform is really a mistake. inverted. . .
