Let about half the tiles move around in one direction (in front of the
slide plane), and the rest the other direction (behind the slide
plane).
Make sure tiles that rotate into each other's location go the same way
around, so that they don't pass through each others, which looks ugly.
Avoid z-fighting by not letting the tile end up exactly on top of the
one it is replacing, in case that one has not started moving yet.
Change-Id: I232b0f815412d5d575b0dde4df2d337288e645bb
I was suffering from one basic misunderstanding: I did not get it that
samplers are indexed with normalized texture coordinates, i.e. 0..1.
(Note that multiplying a coordinate by any number does not break
anything horribly for this use case, looking up a pseudo-random
number, because textures by default repeat as a coordinate wraps.)
We multiply by 10 so that neighbouring pixels that map to close index
into the permTexture don't get clumped together with close sn values,
and thus same behaviour.
(Sure, the multiplication by 256 that I had changed it to worked, too,
but not the way my initial reasoning went... So let's use the original
10 to avoid somebody else thinking that we need to multiply by 256
because permTexture is built from a 256x256 array.)
(See 1877228ae8)
Change-Id: I1d350446460fe2fdd3e55f00053a5ce01d2d117c
Use #version 120 explicitly, and adapt the shader shader code
accordingly, to use strictly only GLSL 1.20 constructs. Also, use less
vertex attribute data in the Vortex vertex shader: We can pack the
per-vertex tile x and y index and in-tile vertex index information
into one float. Also, the shader can calculate the center of the tile
a vertex belongs to based on the knowledge of which tile it is.
Now the shader transitions work on OS X, too.
Change-Id: I93e8b5069a6d06d2e412ffee322b1eb32805e606
The actual transition is not yet at all like the one in the competing
product. But some basic ideas are in place.
Change-Id: Ie17a4fe03ae93abe51a2f1f760f417ee4b193e2c
