What's the most effective way to interpolate between two colors? (pseudocode and bitwise ops expecte

Posted by navand on Stack Overflow See other posts from Stack Overflow or by navand
Published on 2010-04-13T15:37:38Z Indexed on 2010/04/13 15:43 UTC
Read the original article Hit count: 246

Filed under:

hexadecimal

|

hex

|

color

|

interpolation

Making a Blackberry app, want a Gradient class. What's the most effective way (as in, speed and battery life) to interpolate two colors? Please be specific.

// Java, of course
int c1 = 0xFFAA0055   // color 1, ARGB
int c2 = 0xFF00CCFF   // color 2, ARGB
float st = 0          // the current step in the interpolation, between 0 and 1

/* Help from here on. Should I separate each channel of each color, convert them to decimal and interpolate? Is there a simpler way?

interpolatedChannel = red1+((red2-red1)*st)
interpolatedChannel = interpolatedChannel.toString(16)

^ Is this the right thing to do? If speed and effectiveness is important in a mobile app, should I use bitwise operations?

Help me! */

© Stack Overflow or respective owner

Related posts about hexadecimal

C#: How to parse a hexadecimal digit

as seen on Stack Overflow - Search for 'Stack Overflow'
Okay, I am working on a card playing program, and I am storing card values as hexadecimal digits. Here is the array: public int[] originalCards = new int[54] { 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x21, 0x22, 0x23, 0x24, 0x25… >>> More
Converting binary to hexadecimal??

as seen on Stack Overflow - Search for 'Stack Overflow'
Hey guys, Just wondering on how I would go about converting binary to hexadecimal?? Would I first have to convert the binary to decimal and then to hexadecimal?? For example, 101101001.101110101010011 How would I go about converting a complex binary such as the above to hexadecimal? Thanks in… >>> More
Problem reading hexadecimal buffer from C socket

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm using the SDL_net sockets API to create a server and client. I can easily read a string buffer, but when I try to send hexadecimal data, recv gets the length, but I cannot seem to be a able to read the buffer contents. IPaddress ip; TCPsocket server,client; int bufSize = 1024; char message[bufSize]; int… >>> More
find the colour name from a hexadecimal colour code

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi , i want to find the name of a colour from the hexadecimal colour code. When i get a hex colour code i want to find the most matching colour name. for example for the code #c06040 , how to find out if it is a shade of brown, blue or yellow ?. so that i can find the colour of an object in the image… >>> More
jQuery jPicker users: hexadecimal returns 8 digit value?

as seen on Stack Overflow - Search for 'Stack Overflow'
I've just about got the jPicker script working flawlessly in my app. However, the value it returns contains 8 digits. Example: 212ebcff Is there a preset variable that forces jPicker to return a 6 digit hex value? >>> More

Related posts about hex

PHP - Rotate a HEX color value (eg swap all colors with "next" hex)

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a set of hex values in an array in PHP. On my page, I have a slider which the user can "slide" to return a value between 1-100. I want to then, based on this slider value, swap all the colors in the array based on the colors "next" color based on the position in the array. An example of the… >>> More
How to tell endianness from this output?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm running this example program and I'm suppossed to be able to tell from the output what machine type it is. I'm certain it's from inspecting one or two values but how should I perform this inspection? /* pointers.c - Test pointers * Written 2012 by F Lundevall * Copyright abandoned. This file… >>> More
double to hex. How It's Made?

as seen on Stack Overflow - Search for 'Stack Overflow'
157,453796 = hex 18068A 157,455093 = hex 180697 71,5037 = hex E91D00 71,506104 = hex E93500 71,507103 = hex E93F00 0 = hex 000000 I know exactly what it is not IEEE 754 >>> More
C# converting string to hex and XOR on Hex numbers

as seen on Stack Overflow - Search for 'Stack Overflow'
Im tring to do an XOR on 2 hex numbers to create a unique hex number ex. 7F4 ^ 65D which would equal 1A9 I understand how the XOR should work but every time I try to convert the string hex number: string hex1 = "7F4"; int hexInt = Convert.ToInt32(hex1, 16); I end up with a number: 2036 How do… >>> More
WPF - Byte Array to Hex View (similar to Notepad++ HEX-Editor plugin)

as seen on Stack Overflow - Search for 'Stack Overflow'
I am using an ItemsControl to display a List<byte> in hex. The ItemsPanelTemplate is a UniformGrid with a fixed number of columns: <ItemsControl HorizontalAlignment="Left" VerticalAlignment="Top" ItemsSource="{Binding}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> … >>> More