Algodoo

tjey kist explpoed

they just exploded* i wasnt looking at what i was pressing

I hope you don't drive a car that way!

Puzzle: The marbles appear to be magnifying a virtual image directly under the marble. What is the texture matrix of the virtual image? What is the apparent magnification?

Q: The marbles appear to be magnifying a virtual image directly under the marble. What is the texture matrix of the virtual image?

A: Each marble is using the same image as the one that they roll over. They don't actually magnify anything. They simply display the texture (which can be any texture image). In the textureMatrix, the Xoffset and Yoffset values continuously increase or decrease with the marble X and Y motion. Here is the textureMatrix values in each marble:

{
[0.3, -1.6784365e-009, pos(0) * 0.62, 1.6784365e-009, 0.3, pos(1) * 0.7, 0.0, 0.0, 1.0]
}

The pos(0) and pos(1) values include a factor which determines how quickly the texture appears to move over distance. The Xscale and Yscale values determine the apparent magnification.

A few years ago I posted a scene which simulates a magnifying glass. I used the same technique in that one.

Good questions!


Magnifying Glass V3

What is the texture matrix of the virtual image?
[0.62, 0.0, 0.635, 0.0, 0.7, 0.15, 0.0, 0.0, 1.0]

What is the apparent magnification?
[2.0667,2.3333]

This can be verified by setting the texture matrix for the main box to be [0.62, 0.0, 0.635, 0.0, 0.7, 0.15, 0.0, 0.0, 1.0] and textureClamped = [false, false].
To set a marble magnification to 1.0, set texture matrix = {[0.62, 0, pos(0) * 0.62, 0, 0.7, pos(1) * 0.7, 0.0, 0.0, 1.0]}.

Thanks for the info.

so cool xray

Thanks Valen.

they blow up after they get too small so funny!!!

irs so funny when they just blew up like brrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr and you can barely see it

white its now camoflauged :F