pa_effect_2i.py

# Source from Peak Ambition (jtruk)
# License: Pirate's Honour
# You're welcome to take / copy / adapt, but please:
# 1) Drop me a little credit if you do, thanks :)
# 2) Leave this header in place, to retain the license info.
# 3) Let me know if you use / improve it!
# Full source: https://github.com/creativenucleus/picovision-peakambition/

from math import sin, cos
from pa_effect import paCEffect
import pa_shared_vars as shared_vars

class paCEffect2I(paCEffect):
    def __init__(self, iVersion):
        super().__init__()
        self.iVersion = iVersion
        
    def draw(self, gfx, display, lerpPos, tweenPos):
        baseA=sin(lerpPos*10)*2

        sat = 1 if (self.iVersion == 0) else shared_vars.MUSIC_OUT_PULSE
        for y in range(display['h']/3):
            yline=y*3
            a=baseA+y*0.01+sin(yline*.01+lerpPos*14)*2
            w=80*tweenPos

            xc=display['xmid']+(sin(yline*.015+lerpPos*20)*40*lerpPos)
            sina=sin(a)
            cosa=cos(a)
            x0=int(xc+sina*w)
            x1=int(xc+cosa*w)
            x2=int(xc-sina*w)
            x3=int(xc-cosa*w)
            cshift=lerpPos+y*.005

            if x1>x0:
                gfx.set_pen(gfx.create_pen_hsv(0+cshift, sat, -sina*.5+.5))
                gfx.pixel_span(x0,yline,x1-x0)
            if x2>x1:
                gfx.set_pen(gfx.create_pen_hsv(0.25+cshift, 1-sat, -cosa*.5+.5))
                gfx.pixel_span(x1,yline,x2-x1)
            if x3>x2:
                gfx.set_pen(gfx.create_pen_hsv(0.5+cshift, sat, sina*.5+.5))
                gfx.pixel_span(x2,yline,x3-x2)
            if x0>x3:
                gfx.set_pen(gfx.create_pen_hsv(0.75+cshift, 1-sat, cosa*.5+.5))
                gfx.pixel_span(x3,yline,x0-x3)

    def legend(self):
        return "Twister"
    
    def detail(self):
        return "This is a really pretty effect!\nThe shape is like a square, rotated for each horizontal line\nLots of sin and cos happening here!"