And of course, BOSL2 has this in its heightfield() module:  https://github.com/BelfrySCAD/BOSL2/wiki/shapes3d.scad#functionmodule-heightfield waterSize = [120, 120]; waveLength = 20; waveH = 2; baseH = waveH + 0.5; water(waterSize); function wave(x, y) = sin(360*norm([x,y] - waterSize/2)/waveLength) * waveH; module water(size) { water = [ for

. _______________________________________________ Parshat Vayikra includes instructions "if a leader has sinned" (4:22). The Talmud interprets "if" to be derived from the word "fortunate" (asher and ashrei), which would make the Passuk (verse) read, "fortunate is the leader that has sinned". How does that make any sense?

= [ [ 1, 0, 0, x ], [ 0, 1, 0, y ], [ 0, 0, 1, 0 ], [ 0, 0, 0, 1 ] ]; // generate 4x4 rotation matrix around Z axis function mr(a) = [ [ cos(a), -sin(a), 0, 0 ], [ sin(a), cos(a), 0, 0 ], [ 0, 0, 1, 0 ], [ 0, 0, 0, 1 ] ]; module tree(length, thickness, count, m = identity) { color([0, 1 - (0.8 / levels * count), 0])

. -- View this message in context: http://forum.openscad.org/rotating-a-cube-around-the-center-of-the-y-axis-of-the-cube-tp3424p13621.html Sent from the OpenSCAD mailing list archive at Nabble.com.

I am looking for two of the older-style Itt/Jabsco/Par Y valves - part 45510-0000. These were the ones with the handles that tended to break off. My boat is plumbed with them and none of the current valves will fit. Somewhere there have to be some on the shelf or in someone's unused spares kit. Any leads appreciated. Joe Urban

I ended up installing service kits in both the Forespar "Y" valves and they both now operate fine. Today I finished the project by installing a service kit in the Jabsco macerator pump and now it works great. Now I can effectively pump from head overboard or to holding tank; and pump the holding tank to deck pumpout or overboard thru the macerator pump.

Just sweep in the X-Z plane by changing e() to function e(i) = [ 450 * cos(6 * 360 * i), 0, 300 * sin(6 * 360 * i) ]; and rotate the result back to X-Y. ciao, Torsten.

[p.x, p.z*sin(a), p.z*cos(a)] : axis=="Y"?

The issue Dan is bringing up is specifically with this bit -> “A is maximal (x = x_max and y = -x_max)”. If the carrier mixer input is a “perfect” iq tone, as it is in Dan case, with sin and cos waveforms 90 degrees apart the condition “x = x_max and y = -x_max” never occurs (see below that there is never a point in time where x is 1 and y is 1 (or -1)).

If the carrier mixer input is a > “perfect” iq tone, as it is in Dan case, with sin and cos waveforms 90 > degrees apart the condition “x = x_max and y = -x_max” never occurs (see > below that there is never a point in time where x is 1 and y is 1 (or -1)). > > > > [image: cid:image003.png@01DA5377.D1D769A0] > > > > Euler’s formula is the easiest way to understand