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Add fractal example

This commit is contained in:
Nils Dagsson Moskopp 2022-05-15 03:10:53 +02:00
parent 25b7b30945
commit 5640e19c94
Signed by untrusted user who does not match committer: erlehmann
GPG Key ID: A3BC671C35191080
1 changed files with 22 additions and 0 deletions
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examples.lua
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@ -60,3 +60,25 @@ for x = 1,16,1 do -- left to right
end
tga_encoder.image(pixels, {colors="RGB", pixel_depth=16}):save("gradients_16bpp.tga")
tga_encoder.image(pixels, {colors="RGB", pixel_depth=24}):save("gradients_24bpp.tga")
local pixels = {}
for x = 1,512,1 do -- left to right
for z = 1,512,1 do -- bottom to top
local oz = (z - 256) / 256 + 0.75
local ox = (x - 256) / 256
local px, pz, i = 0, 0, 0
while (px * px) + (pz * pz) <= 4 and i < 128 do
px = (px * px) - (pz * pz) + oz
pz = (2 * px * pz) + ox
i = i + 1
end
local color = {
math.max(0, math.min(255, math.floor(px * 64))),
math.max(0, math.min(255, math.floor(pz * 64))),
math.max(0, math.min(255, math.floor(i))),
}
pixels[z] = pixels[z] or {}
pixels[z][x] = color
end
end
tga_encoder.image(pixels, {colors="RGB", pixel_depth=24}):save("fractal_24bpp.tga")