Search the Community
Showing results for tags 'color wheel'.
Found 1 result
-
I am using version 12.0, and I am wondering if this hue situation is a bug, or a limitation. I expect to take a solid colored object, adjust its hue around the 360 color wheel, and get a solid color back, but the colors I get are muddled. The saturation is off. I make a solid green object of 0x00FF00 (100% green). When I adjust the hue by 180, I expect it to go to the opposite side of the RGB color wheel to 100% purple, but it goes to 0xFF6EFF, or 255 for red and blue, as expected, but a green value of 110 (not 0), giving me a muddled purple. Similarly, when I try to adjust the same bright green object to bright red, using a hue adjustment of 240, it is a muddled red. I poked into the code, and see the use of Luminosity constants for R, G, and B at 0.212671, 0.715160, and 0.072169. Perhaps these are not the best constants? Perhaps the algorithm for hue adjustment on line 165 in ColorMatrixPlugin.as in version 12.0 is incorrect? var c:Number = Math.cos(n), s:Number = Math.sin(n), temp:Array = [(_lumR + (c * (1 - _lumR))) + (s * (-_lumR)), (_lumG + (c * (-_lumG))) + (s * (-_lumG)), (_lumB + (c * (-_lumB))) + (s * (1 - _lumB)), 0, 0, (_lumR + (c * (-_lumR))) + (s * 0.143), (_lumG + (c * (1 - _lumG))) + (s * 0.14), (_lumB + (c * (-_lumB))) + (s * -0.283), 0, 0, (_lumR + (c * (-_lumR))) + (s * (-(1 - _lumR))), (_lumG + (c * (-_lumG))) + (s * _lumG), (_lumB + (c * (1 - _lumB))) + (s * _lumB), 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1]; It is pretty complex, as I assume it needs to be, but could there be something askew in there? If I use a bright green object of 0x00FF00, and adjust the hue value by 60, 120, 180, 240, or 300; I was hoping I could get bright versions of teal, blue, purple, red, yellow. but it appears I can not get bright objects out of the hue transformation function. [in my attached image, I use two identical looking bright green circles, and adjust the right one to get bright red using code, but it does not come out as bright red. TweenMax.to(adjustedSprite, 1, {colorMatrixFilter:{hue:240 }} ); I remember reading about how Flash doesn't always work like Photoshop does, but this is just a color wheel hue issue, no? Thanks in advance, jimmi.
