Color wheel: Difference between revisions

# Sample: Color Wheel

# Author: Gal Zsolt, Bert Mariani, Ilir Liburn & Mahmoud Fayed

xWidth = 400

yHeight = 400

MyApp = new qapp

win1 = new qwidget()

{ setwindowtitle("ColorWheel-FastDraw")

setgeometry(500,150,xWidth,yHeight)

Canvas = new qlabel(win1)

{ ### daVinci paints the MonaLisa on the Canvas

MonaLisa = new qPixMap2( xWidth, yHeight)

color = new qcolor(){ setrgb(255,255,255,0) }

pen = new qpen() { setwidth(1) }

MonaLisa.fill(color)

daVinci = new qpainter()

{ begin(MonaLisa)

#endpaint() ### This will Stop the Painting. For Animation comment it out

}

setPixMap(MonaLisa)

}

show()

}

ColorWheel()

exec()

//=====================

Func colorWheel

#=====================================================================#

? "Start Processing..."

t1 = clock()

? "Clock : " + t1

#=====================================================================#

aList = []

pi = 3.14159265359

diameter = pi * 2

radius = yHeight / 2

v = 1 // value/brightness 1 to 100 1=bright 0=dark

for i = 1 to xWidth

iradius = i - radius

p = pow( iradius, 2)

for j = 1 to yHeight

h = (atan2( iradius, j-radius ) + pi ) / diameter // hue/color 1 to 360

s = sqrt( p + pow( j-radius, 2)) / radius // saturation/intensity 1 to 100

if s <= 1 and h <= 1

aList + [i,j,h,s,v,1]

ok

next

next

#=====================================================================#

? "Start drawing..."

t2 = clock()

? "Clock : " + t2

#=====================================================================#

daVinci.drawHSVFList(aList)

Canvas.setPixMap(MonaLisa)

#=====================================================================#

? "Done..."

t3 = clock()

? "Clock : " + t3

#=====================================================================#

? "Processing Time: " + ( (t2-t1)/ClocksPerSecond() ) + " seconds "

? "Drawing Time: " + ( (t3-t2)/ClocksPerSecond() ) + " seconds "

? "Total Time: " + ( (t3-t1)/ClocksPerSecond() ) + " seconds "

#=====================================================================#

return

//==================