# brmlab/ledbar

Merge blinkenlight:ledbar

• Loading branch information...
2 parents 30dcfd5 + 33b66f5 commit 21c8bec799e5b50fadee1e50a30301b9d2c03424 pasky committed Dec 22, 2012
Showing with 60 additions and 0 deletions.
1. +60 −0 host_python/rainbow2d.py
 @@ -0,0 +1,60 @@ +from ledbar import Ledbar +import math, time + +WIDTH = 4 +HEIGHT = 5 +PIXELS = 20 + +def lint(x, points, values): + assert(len(points) == len(values)) + + for i in range(len(points)-1): + if x > points[i+1]: + continue + width = points[i+1] - points[i] + assert(width > 0) + + t = (x - points[i]) / width + t_1 = 1.0 - t + return values[i]*t_1 + values[i+1]*t + + return values[len(values)-1] + +# Correction values +corr_r_p = [0.0, 0.5, 0.7, 0.9, 1.0] +corr_r_v = [0.0, 0.05, 0.15, 0.45, 1.0] +corr_g_p = [0.0, 0.55, 0.9, 1.0] +corr_g_v = [0.0, 0.08, 0.2, 1.0] +corr_b_p = [0.0, 0.6, 0.75, 1.0] +corr_b_v = [0.0, 0.13, 0.18, 1.0] + +def set_pixel_2d(bar, x, y, r, g, b): + bar.set_pixel(WIDTH - x - 1 + y*WIDTH, r, g, b) + +def cdist(center, point, scale): + dist = math.sqrt(reduce( + lambda a,b: a+b, + map(lambda (x,y): (x-y)**2, zip(center,point)) + )) + dist = dist*scale + return dist + +l = Ledbar(PIXELS) + +M = max(WIDTH, HEIGHT) +center_b = [0,0] +work = True +t = 0 +while work: + center_r = [math.sin(t)*(M/2)+WIDTH/2-1, math.cos(t)*(M/2)+HEIGHT/2-1] + center_g = [math.sin(t*0.53234)*(M/2)+WIDTH/2-1, HEIGHT/2-1] + for x in range(WIDTH): + for y in range(HEIGHT): + r = cdist(center_r, [x,y], 0.2) + r = lint(r, corr_r_p, corr_r_v) + g = cdist(center_g, [x,y], 0.2) + g = lint(g, corr_g_p, corr_g_v) + set_pixel_2d(l, x, y, r, g, 0) + work = l.update() + t += 0.03 + time.sleep(0.025)

#### 0 comments on commit 21c8bec

Please sign in to comment.