Stacked Bar Graph

[Kevin Camp]

i think i’d do each graph with 3 solids that are identical except for color (by your example: dark gray, medium gray, light gray), and set the x value of the anchor points of each to 0. then make sure they are layered in the order dark, medium, light in the timeline.

then i’d link the position of the medium gray bar to the position + the width * the scale of the dark bar with an expression like this:

target = thisComp.layer(“Dark Gray Solid”);
target.position + (target.width * target.scale[0] / 100)

now all you should need to do is unlink the scale properties for both the dark and medium gray bars and set the x-scale value to the appropriate value…say dark gray 25%, medium gray 35% and the light gray solid will simply reveal the remaining percent.

you could link the x-scale values to sliders on a null to easily enter values in a single location if needed.

Kevin Camp
Art Director
KCPQ, KZJO & KRCW

[Colin Kohler]

Thanks Kevin,

I’m trying something similar now with strokes on shape paths.

I’ll give yours a try!

Colin

[Kevin Camp]

if you want to get creative, you could do each bar graph on one layer…

first create a layer the is the width of the bar that you need, but only 1 pixel high (like 800×1) and make it the light gray color.

add 2 slider controls (these will be where you will enter your percentage values).

then add a circle effect, set the blending mode to normal, the center to 0,0.5 and the color to medium gray,

duplicate that cirlcle effect and set the color to dark gray.

then add the reptile effect and increase the expand down and up value to 50 or so to get the bar height/thickness as needed.

now, add this expression to the center property of the first circle effect to link it to the radius of the second circle effect:

x = effect(“Circle 2”)(“Radius”);
[x,0.5]

then use these expressions on circle 1 and circle 2’s radius properties to link them to slider 1 and slider 2 respectively.

circle 1 radius:
pct1 = effect(“Slider Control”)(“Slider”);
width * pct1 / 100

circle 2 radius:
pct2 = effect(“Slider Control”)(“Slider”);
width * pct2 / 100

now you should be able to set the percentages for the dark gray and medium gray bars with the slider, and the light gray portion will be what’s left over.

Kevin Camp
Art Director
KCPQ, KZJO & KRCW

[Kevin Camp]

in my haste to post that before i got off work, there was a mistake on the last expression where it was looking at the same slider as the first radius expression. it should look like this:

circle 2 radius:
pct2 = effect(“Slider Control 2”)(“Slider”);
width * pct2 / 100

Kevin Camp
Art Director
KCPQ, KZJO & KRCW

[Colin Kohler]

No sweat! Thanks for the help!

[Kevin Camp]

it looks like i also reversed the slider-to-circle relationship too… slider 1 should control circle 2 and slider 2 should control circle 1:

circle 1 radius:
pct2 = effect(“Slider Control 2”)(“Slider”);
width * pct2 / 100

circle 2 radius:
pct1 = effect(“Slider Control”)(“Slider”);
width * pct1 / 100

Kevin Camp
Art Director
KCPQ, KZJO & KRCW