Kalleheikki Kannisto
1
COW Coin
Forum Replies Created
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Like so:
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A sphere consists of a surface at a fixed distance from a single point.
Thus, if you rotate a layer around a fixed point at a fixed distance, it rotates along the surface of a sphere.
Note: If you want them to be aligned to horizontal and vertical lines on the surface of the sphere, rotate around y and x axis only, not Z, that essentially rotates the image around it’s own center point.
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I didn’t try this, but it sounds like it would work by adding an offset value to the second to last line:
t = time - m.time + [offset value here]; -
You can also use the opacity value directly. Assuming your main comp is called “Main Comp” and the layer the opacity of which you want to match is “My Layer” the expression for you nested layer’s opacity would be:
comp("Main Comp").layer("My Layer").transform.opacity -
(Dave probably read “lighting” instead of “lightning,” that’s what I did the first time. With lighting it wouldn’t really matter.)
Ok, so you want to sample the foreground layer to see when the lightning strikes and apply it to the background as a color adjustment.
The basic method would be as follows.
1) Add a point control to the foreground layer. This is used to pick the point where you want to sample.
2) Add Brightness Contrast Effect to the background layer and use this expression for the Brightness value:
targetLayer = thisComp.layer(thisLayer.index-1);
samplePoint = targetLayer.effect("Point Control")("Point");
sampleRadius = [10,10];
sampledColor_8bpc = 255 * targetLayer.sampleImage(samplePoint, sampleRadius);
R = Math.round(sampledColor_8bpc[0]);
G = Math.round(sampledColor_8bpc[1]);
B = Math.round(sampledColor_8bpc[2]);
V = (R+G+B)/3;
VThat code will take a 20 by 20 pixel square area around the point set by a point control on the layer above (index-1), average the RGB value to a single value and apply it to the Brightness of the layer below. ANY shift in top layer’s brightness will affect the brightness of the bottom layer. Thus, for practical purposes, you’d want to give “V” a threshold level, that occurs only during the actual flashes, above which it would affect brightness. And you could sample a smaller or larger area as needed. And if there are more layers in between you foreground and background layers, you’d have to change the layer selection value (index-[number of layers here]).
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Content-aware fill is a good way to start. After that, the clone/patch/healing tools are your main arsenal.
This article seems very thorough:
https://www.smashingmagazine.com/2010/03/the-ultimate-guide-to-cloning-in-photoshop/
If you’d rather watch a video tutorial, google for “Photoshop clone (patch/healing) tool”.
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Ok, got it now. If you’re going to be animating this in Photoshop, I’d try the following:
1) On an empty layer, create the shape you want to show as marqueed and stroke it with 1 pixel stroke with the pen tool or the stroke command. You should now have a transparent layer with nothing but the 1-pixel stroke, no fill.
2) Create a new layer above this layer with black and white diagonal stripes (bottom left to top right) at about 8 pixel intervals — I don’t know what the actual distance between the lines is but that might work. If you know how to create a pattern and fill with it, that would be a fast method to create the stripes.
3) Then ctrl-click the line between the layers to make the top layer use the transparency of the bottom one. Now you should see a still version of the “ants.”
4) Animate the top layer to move down and to the right at a pace that looks like the marching ants.
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Another consideration is reading and writing on the same disc, it would be faster to read from one disc and write to a different one, if that is possible in your setup.
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Yes, use masks instead of black solids. Black solids render as black. You can see what is actually transparent by clicking on the “toggle transparency grid” under the program monitor.
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I find Form to be a tad easier than Particular. They’re very similar in logic and in terms of controls.
