Last active
September 19, 2021 20:45
-
-
Save esnho/cda2c8cad4338b8450277a54f78bacd1 to your computer and use it in GitHub Desktop.
skew-in for erogenous tone structure, doesn't work!
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| precision mediump float; | |
| // template : glsl.ergonenous-tones.com | |
| varying vec2 tcoord; // location | |
| uniform sampler2D tex; // texture one | |
| uniform sampler2D tex2; // texture two | |
| uniform vec2 tres; // size of texture (screen) | |
| uniform vec4 fparams; // 4 floats coming in | |
| uniform ivec4 iparams; // 4 ints coming in | |
| uniform float ftime; // 0.0 to 1.0 | |
| uniform int itime; // increases when ftime hits 1.0 | |
| //f0:skew x: | |
| //f1:skew y: | |
| //f2:scale: | |
| //f3:transOrigX: | |
| //f4:transOrigY: | |
| float skewLimit = 1.; | |
| float transformLimit = 1.; | |
| float scaleLimit = 5.; | |
| float f0 = mix(-skewLimit, skewLimit, fparams[0]); | |
| float f1 = mix(-skewLimit, skewLimit, fparams[1]); | |
| float magicLerp = 2.34; // raise the input param at this power to start from ~1.0 when param = 0.5 | |
| float f2 = mix(.0, scaleLimit, pow(fparams[2], magicLerp)); | |
| // float f3 = mix(-transformLimit, transformLimit, fparams[3]); | |
| // float f4 = mix(-transformLimit, transformLimit, fparams[3]); | |
| float time = float(itime) + ftime; | |
| vec2 resolution = tres; | |
| // How much we want to skew each axis by | |
| float xSkew = f0; | |
| float ySkew = f1; | |
| // Create a transform that will skew our texture coords | |
| mat3 trans = mat3( | |
| 1.0, tan(xSkew), 0.0, | |
| tan(ySkew), 1.0, 0.0, | |
| 0.0, 0.0, 1.0 | |
| ); | |
| void main(void) { | |
| // the two vec2 can be parametrised to adjust transform origin | |
| vec2 texCoord = (trans * (vec3((tcoord.xy - vec2(.5, .5)) * f2, 0.0))).xy + vec2(.5, .5); | |
| // How much we want to skew each axis by | |
| float xSkew = f0; | |
| float ySkew = f1; | |
| // Create a transform that will skew our texture coords | |
| mat3 trans = mat3( | |
| 1.0, tan(xSkew), 0.0, | |
| tan(ySkew), 1.0, 0.0, | |
| 0.0, 0.0, 1.0 | |
| ); | |
| vec4 textOut = texture2D(tex, texCoord); | |
| gl_FragColor = vec4(textOut); | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment