draw_plasma() ..deciphering function parameters alpha,beta, scale

[pwplus7]

unsigned int cc[3]= {0xff,0x00,0x00} ; img.fill(0xff).draw_circle ( W/2, H/2, 60, cc, 1.0, ~1); disp.display(img).wait(3000) ; for (k=0; k<6; k++) { img.draw_plasma(0.5,1.5, 2) ; disp.display(img).wait(3000) ; }