glrb is a simple OpenGL wrapper for Ruby
gem install glrb
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require 'glrb'
include Glrb
gl = GL.new 1280, 800
gl <=> ->{
st = gl.FragCoord.xy / vec(gl.w, gl.h)
vec st.x, st.y, 0.0, 1.0
}
gl.draw |
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require 'glrb'
include Glrb
gl = GL.new 1280, 800
gl <=> ->{
a = vec 1.0, 1.0, 0.0
b = vec 0.0, 1.0, 1.0
c = vec 0.1, 0.2, 0.1
col = vec 0.0, 0.0, 0.0
st = gl.FragCoord.xy / vec(gl.w, gl.h)
x = st.x * 5.0
w = 0.01
col += a * stroke st.y, sin(x) * 0.3 + 0.5, w
col += b * stroke st.y, cos(x) * 0.2 + 0.5, w
col += c * stp grid(st.x, w * 0.5, 0.1) + \
grid(st.y, w * 0.5, 0.1), 0.5 \
vec col.x, col.y, col.z, 1.0
}
gl.draw |
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require 'glrb'
include Glrb
gl = GL.new 64, 64, "noise.ppm"
gl <=> ->{
x = gl.FragCoord.x / gl.w
y = gl.FragCoord.y / gl.h
pos = vec(x, y, 0.0)
col = snoise(pos) * 0.5 + 0.5
gl.FragColor = vec col, col, col, 1.0
}
gl.draw |
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require 'glrb'
include Glrb
gl = GL.new 64, 64, "fbm.ppm"
gl <=> ->{
x = gl.FragCoord.x / gl.w
y = gl.FragCoord.y / gl.h
pos = vec(x, y, 0.0)
col = fbm(pos) * 0.5 + 0.5
gl.FragColor = vec col, col, col, 1.0
}
gl.draw |