Please forgive my ignorance/inexperience, but I have no idea how to install the new version of Gem. There doesn't appear to be a .dmg file or any compiled binaries as part of the download : I am using MacOS 10.6.2. Not being a programmer I have no idea how to build binaries from the source code - I have tried running autoconf and opening the XCode project and building but am getting errors...
Any help gratefully received!!!

I'm having trouble with banding when making grayscale gradients - ie. I seem to be getting discrete jumps in shade that seem too big when compared with a similar gradient in Photoshop. I've tried using colorsquare and blending between vertices using GEMglColor4f. Has anyone got any tips?
IS the color bit depth set by the hardware/can I find out whether things are working at 16bit or 32bit?
I'm running a MacBookPro with an Nvidia GT330M video card with GEM 0.92.3.

Is there a way to dynamically define a continuously varying colour gradient using GEM?

I'm only interested in greyscale, and have tried colorSquare, but find it quantises the colours too much - ie. I get stripes when the difference between greys is small.

I've looked down the GL_QUADS route with GEMglColor3f and GEMglVertex2f, but as you might expect I can't find a way of separating the colours - ie. the last GEMglColor3f called always colours all four vertices.

Am I missing something really obvious here?!

Or am I going to have to investigate glsl shaders....

Thanks.

I'm newish to PD, so please forgive me if there is a really simple answer to this (I have searched the forum but without any luck!)

I am writing a patch where I want to use both an external MIDI control message and a mouse operated vslider object to change the same parameter. The reasons behind this are a little involved but I can explain if necessary.

This is what I want to achieve - I change the parameter value by moving the slider with the mouse, and then use an external MIDI controller to increase or decrease the value depending on whether I turn the knob clockwise or anti-clockwise.

I've written an abstraction that looks at the MIDI input to see whether it's increasing or decreasing and output +1 if it's increasing, and -1 if decreasing for each change.

I then need to sum the +/- 1 with the current value of the fader - but obviously when I send the sum back to the fader to update it, I get a loop and a stack overload.

Any ideas greatly appreciated!!!

thankyou. all working now - had to restructure the way in which the data was flowing - much neater...