7.9 data/examples/formula3_3.dat

/*
 * FILE: formula3_3.dat
 *
 * example for displaying a iso surface of a function
 * with marching cube
 *
 */

form1 = FORMULA3( "0.0260516*x*x + 0.028689*y*y + 0.0100072*z*z
                  - 0.057882*x*y + 0.0217817*x*z - 0.0187733*y*z
                  - 0.0812969*x + 0.086143*y + 0.00396285*z - 1.0;", () );

grid1 = GRIDEVAL3( (-30.,50,1.2), (-30.,50,1.2), (-30.,50,1.2), form1 );
march1 = MARCHCUBE( grid1 );

front1 = FRONT_MATERIAL
(
  (0.05, 0.15, 0.075, 1.0),        /* diffuse color    */
  (0.0125, 0.0375, 0.019, 1.0),    /* ambient color    */
  (0.0, 0.0, 0.0, 1.0),            /* emissive color   */
  (0.2, 0.6, 0.3, 1.0),            /* specular color   */
  0.5                              /* shininess        */
);
back1 = BACK_MATERIAL
(
  (0.3, 0.15, 0.12, 1.0),          /* diffuse color    */
  (0.075, 0.0375, 0.03, 1.0),      /* ambient color    */
  (0.0, 0.0, 0.0, 1.0),            /* emissive color   */
  (0.8, 0.4, 0.3, 1.0),            /* specular color   */
  0.5                              /* shininess        */
);
SCENEROOT = SCENENODE ( 
  (), 
  (ATTRIBS(front1,back1)), 
  (march1)
);