swf_lookat

Description

void swf_lookat ( float view_x, float view_y, float view_z, float reference_x, float reference_y, float reference_z, float twist )

The swf_lookat() function defines a viewing transformation by giving the viewing position (the parameters view_x, view_y, and view_z) and the coordinates of a reference point in the scene, the reference point is defined by the reference_x, reference_y, and reference_z parameters. The twist controls the rotation along with viewer's z axis.

add a note User Contributed Notes

hotkey at hehe dot com
03-May-2001 11:34


You can really do stunning 3D effects using swf_lookat() [and swf_ortho, of course].


Here is a little example of doing a simple 3D-rotation around a text.


The Text is split up into 2 parts, because Flash does not (yet?) support perspective-skewing, only rotation, 2D-skew and scaling. But if you split your 3D-object up into several parts, each part is transformed seperately and you can trick around that loss of perspective-skew.





Have a lot of fun experimenting with that piece of code!





regards


HotKey ^ http://www.SPR.AT





- - - - - - >8  - cut here - - - - - 


<?php


Header("Content-type: application/x-shockwave-flash");


swf_openfile("php://stdout", 320, 200, 25, 1, 1, 1);





swf_ortho (-100, 100, -100, 100, -100, 100);     #create 3D coordinates





swf_definefont (0, "Pix3");


swf_addcolor (0, 0, 0, 1);


swf_fontsize (10);


swf_fonttracking(0.2);


for ($i=0; $i<628; $i+=8) {


  $j = $i / 100;


  swf_pushmatrix ();


  swf_translate(0,0,0);


  swf_perspective(100,1,0,10);


  swf_lookat(sin($j)*60,50,cos($j)*60,  0,00,0,  0);





  swf_definetext (1, "HotKey@", 0);


  swf_translate(-50,0,0);





  swf_placeobject(1,10);





  swf_definetext (2, "hehe.com", 0);


  swf_translate (55,0,0);


  swf_placeobject(2,11);


  


  swf_showframe();


  swf_removeobject (10);


  swf_removeobject (11);


  swf_popmatrix();


}





swf_closefile ();


?>


- - - - - - - -  8< - - - - - - - -





*EOF*

add a note