Custom metaballs

[Wolf]

[deleted]

[mayaBug]

終於出手!! crazy !!
解釋一下好喎...

[stantang]

cut

[Wolf]

[deleted]

[h2o]

見到都頭痛

[hehehaha]

正, 雖然唔明, 但有d 高手show 兩手.大家了解什麼叫井底蛙, 什麼叫天外有天. 大家努力d la. 朋友.

[Wolf]

哇，hehehaha，千企唔好咁講。我絕對唔會當邊個系井底蛙，只系幫朋友解決咗呢個技術問題，放上嚟俾大家參觀下。不過我都希望行內artist會學多啲數學之類嘅野，工作上好好用架。

[stantang]

cut

[Wolf]

OK, I'm going to explain this another way. Try this (it's fun, trust me):

1. Create a plane facing z direction, and two locators. Pull apart the locators in x until they're about 2 units away from each other.

2. Assign a surface shader to the plane and create a sampler info node.

3. Now, here's the fun part: Pick the surface shader and open the expression editor. Type in

$r1 = hypot(samplerInfo1.pointWorldX-locator1.translateX,
samplerInfo1.pointWorldY-locator1.translateY);

$r2 = hypot(samplerInfo1.pointWorldX-locator2.translateX,
samplerInfo1.pointWorldY-locator2.translateY);

$i1 = max(0,pow(1-pow($r1/2,2),3));
$i2 = max(0,pow(1-pow($r2/2,2),3));
$i = $i1 + $i2;
surfaceShader1.outColorR = $i < 0.6 ? 1 : 0;

4. Now render. Try pulling the locators closer together and see them merge!

[HammerChugoh]

nice to see technical stuff on this forum :>
And for DD, they are hiring like crazy now as most of their top people left to imageworks and other houses.... even Alan Kapler is no longer there.

[Wolf]

[deleted]

[Wolf]

nice to see technical stuff on this forum :>
And for DD, they are hiring like crazy now as most of their top people left to imageworks and other houses.... even Alan Kapler is no longer there.

Wow. Did he take VB with him? Anyway that's good news for you (or any Houdini artist), I guess. Stealth's got some crazy cloud and terrain stuff, but I thought the building collapse wasn't very well-done. Anyway the film's stupid. But one funny thing was the thailand girl in the film looks like one of the girls in a HK public service ad some time ago (only taller and more well-endowed).

[stantang]

OK, I'm going to explain this another way. Try this (it's fun, trust me):

1. Create a plane facing z direction, and two locators. Pull apart the locators in x until they're about 2 units away from each other.

2. Assign a surface shader to the plane and create a sampler info node.

3. Now, here's the fun part: Pick the surface shader and open the expression editor. Type in

$r1 = hypot(samplerInfo1.pointWorldX-locator1.translateX,
samplerInfo1.pointWorldY-locator1.translateY);

$r2 = hypot(samplerInfo1.pointWorldX-locator2.translateX,
samplerInfo1.pointWorldY-locator2.translateY);

$i1 = max(0,pow(1-pow($r1/2,2),3));
$i2 = max(0,pow(1-pow($r2/2,2),3));
$i = $i1 + $i2;
surfaceShader1.outColorR = $i < 0.6 ? 1 : 0;

4. Now render. Try pulling the locators closer together and see them merge!

Now I got it! expression is easier to understand. of course you drawing helps too... wolf, what the render time of this expression compare to the node version?

[stantang]

nice to see technical stuff on this forum :>
And for DD, they are hiring like crazy now as most of their top people left to imageworks and other houses.... even Alan Kapler is no longer there.

Hey Hammer, are u still in LA?

[Andrew Lee]

Absolutely no idea what r u guys talking about

I better go back to do more drawing