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Downloads
Demo: geexlab-demopack-gl21/d63-matrix-color-formula/main.xml
How to run the demo?
Download and unzip GeeXLab and the demopack where you want, launch GeeXLab and drop the demo (main.xml) in GeeXLab. This demo requires OpenGL 2.1+. |
In the following tweet, iq gives the formula that creates the greenish ambiance of the Matrix movie:
The "Matrix Color" formula. pic.twitter.com/1Iuw9GCQdB
— inigo quilez (@iquilezles) September 23, 2021
I coded this small demo that allows you to play with the color exponents:
The pixel shader:
#version 120 uniform sampler2D tex0; uniform vec4 exponents; // vec4(1.5, 0.8, 1.5, 0.0) float separator(float mouse_x, float vseparator_width, float uv_x) { float separator_posx = mouse_x; float a1 = smoothstep(separator_posx - vseparator_width, separator_posx, uv_x); float a2 = smoothstep(separator_posx + vseparator_width, separator_posx, uv_x); return 1.0- a1*a2; } void main(void) { vec2 uv = gl_TexCoord[0].xy; uv.y *= -1.0; vec4 color = texture2D(tex0, uv * vec2(2.0, 1.0)); if (uv.x>0.5) color.rgb = pow(color.rgb, exponents.rgb); float sep = separator(0.5, 0.01, uv.x); gl_FragColor = color * sep; } |