Use native data to create 3D model_rotation on the imode Platform

On the imode platform, there are two ways to create a 3D model: 1. Import the model from an external. mbac file; 2. Create a 3D model using native data. The following is a program that uses native data to create a triangle cone and can rotate around X and Y axes. Import com. nttdocomo. UI .*;
Import com. nttdocomo. Opt. UI. j3d .*;//
/**
* @ Author ppby
* Rotate 3D
*/
Public class rotate extends iapplication {
Private canvas3d canv; Public void start (){
Try {
Canv = new canvas3d ();
Display. setcurrent (canv );
Thread thread = new thread (canv );
Thread. Start ();
} Catch (illegalthreadstateexception ITSE ){
ITSE. printstacktrace ();
} Catch (exception e ){
E. printstacktrace ();
}
}
}/**
* Canvas class
*/
Class canvas3d extends canvas implements runnable {
// Command list Array
Private int [] Using listfunc _;
Private int [] Using listprim _;
// 3D affine transformation matrix
Private affinetrans viewt = new affinetrans ();
Private affinetrans affinet = new affinetrans ();
Private affinetrans rotatet = new affinetrans (); Private int rotx, roty; // variable for object rotation public canvas3d (){
// Set a camera :( eye position, look at position, UP direction)
Viewt. lookat (
New vector3d (0, 0,800 ),
New vector3d (0, 0, 0 ),
New vector3d (0, 4096, 0)
);
// Set a command list
Setupcmdlistfunc ();
Setupcmdlistprim ();
} Public void run (){
While (true ){
Updateaffinetrans ();
Repaint ();
Try {
Thread. Sleep (100); // wait 100 ms
} Catch (interruptedexception IE ){
}
}
} Public void updateaffinetrans ()
{
Affinet. setidentity ();

// Rotate Y axis
Rotatet. setidentity ();
Rotatet. setrotatey (roty );
Affinet. Mul (rotatet );

// Rotate X axis
Rotatet. setidentity ();
Rotatet. setrotatex (rotx );
Affinet. Mul (rotatet, affinet );
}
/**
* Rendering method.
*/
Public void paint (Graphics g ){
If (G = NULL)
Return;
Try {
G. Lock ();
// Background clear
G. setcolor (graphics. getcolorofrgb (0, 0, 0 ));
G. fillrect (0, 0, getwidth (), getheight (); G. setcolor (graphics. getcolorofrgb (150,150,120 ));
Graphics3d g3d = (graphics3d) g;

// Method 1
G3d. setcliprect3d (0, 0, getwidth (), getheight ());
G3d. setscreencenter (getwidth ()> 1, getheight ()> 1 );
G3d. setperspective (200,100 00, 4096*50/360 );

// Method 2: The effect is the same s method 1.
// G3d.exe cutecommandlist (optional listfunc _); // excute the command list

// Set viewport
Affinet. Mul (viewt, affinet); g3d. setviewtrans (affinet); // set view coordinate Matrix
Setupcmdlistprim ();
G3d.exe cutecommandlist (optional listprim _); // excute a command list
//
G. setcolor (graphics. getcolorofrgb (0,255, 0xff ));
G. drawstring ("Use: Up, down, left, right key.", 0, Font. getdefaultfont ()
. Getheight (); G. Unlock (true );
} Catch (exception e ){
E. printstacktrace ();
}
}/**
* Key event process.
*/
Public void processevent (INT type, int PARAM ){
Try {
If (type = display. key_pressed_event ){
Switch (PARAM ){
Case display. key_up:
Rotx-= 128;
Rotx % = 4096;
Break;
Case display. key_down:
Rotx ++ = 128;
Rotx % = 4096;
Break;
Case display. key_left:
Roty-= 128;
Roty %= 4096;
Break;
Case display. key_right:
Roty + = 128;
Roty %= 4096;
Break;
}
}
} Catch (exception e ){
E. printstacktrace ();
}
}/**
* Set the command list for methods.
* @ Return true-success. False-fail.
*/
Private Boolean setupcmdlistfunc (){
Try {
Int [] Listen listfunc = {
Graphics3d. command_list_version_1,
Graphics3d. command_clip_rect, 0, 0, getwidth (),
Getheight (), graphics3d. command_screen_center,
(Getwidth ()> 1), (getheight ()> 1 ),
Graphics3d. command_perspective1, 200,100 00,
4096*50/360, graphics3d. command_end };
Required listfunc _ = required listfunc;
Return true;
} Catch (exception e ){
E. printstacktrace ();
Return false;
}
}/**
* Set the command list for primitives.
* @ Return true-setting succeeded. False-setting failed.
*/
Private Boolean setupcmdlistprim (){
Try {
// Draw four trangles.
Int [] bytes listprim = {
Graphics3d. command_list_version_1,
// Triangles
(Graphics3d. command_render_triangles
| Graphics3d. color_per_face | (4 <16), // trangle num <16 // each trangle's three vertexes. vertex :( x, y, z)
0,120, 0,-120,-120,120,120,-120,120, 0,120, 0,120,-120,120,120,-120,-120,-0,120, 0,120,-120,-120,-120, -120,-120, 0,120, 0,-120,-120,-120,-120,-120,120, // each trangle's color
0xff <16, // red
0xff <8, // green
0xff <4, // blue
0xff <8 | 0xff <16, // yellow
// Flush
Graphics3d. command_flush, graphics3d. command_end };
Required listprim _ = required listprim;
Return true;
} Catch (exception e ){
E. printstacktrace ();
Return false;
}
}
}