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rename uniforms

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This commit is contained in:
Emile Clark-Boman 2026-02-02 05:02:23 +10:00
parent 1683d2bbe9
commit 53a62f639e
5 changed files with 59 additions and 37 deletions
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15
www/shaders/fbm.glsl
View file

@ -5,9 +5,8 @@
precision mediump float;
#endif
uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_time;
uniform vec2 uResolution;
uniform float uTime;
float random (in vec2 _st) {
return fract(sin(dot(_st.xy,
@ -65,17 +64,17 @@ float fbm ( in vec2 _st) {
#define SCALE 3.
void main() {
vec2 st = gl_FragCoord.xy/u_resolution.xy*SCALE;
// st += st * abs(sin(u_time*0.1)*3.0);
vec2 st = gl_FragCoord.xy/uResolution.xy*SCALE;
// st += st * abs(sin(uTime*0.1)*3.0);
vec2 q = vec2(
fbm( st + 0.*u_time),
fbm( st + 0.*uTime),
fbm( st + vec2(1.0))
);
vec2 r = vec2(
fbm( st + 1.0*q + vec2(1.7,9.2)+ 0.15*u_time ),
fbm( st + 1.0*q + vec2(8.3,2.8)+ 0.126*u_time)
fbm( st + 1.0*q + vec2(1.7,9.2)+ 0.15*uTime ),
fbm( st + 1.0*q + vec2(8.3,2.8)+ 0.126*uTime)
);
float f = fbm(st+r);

18
www/shaders/optimised.glsl
View file

@ -13,8 +13,8 @@ precision mediump float;
# endif
#endif
uniform float u_time;
uniform vec2 u_resolution;
uniform float uTime;
uniform vec2 uResolution;
/* ==== Text Colouring ==== */
#define PHOSPHOR_COL vec4(196./255., 167./255., 231./255., 1.)
@ -49,9 +49,9 @@ float roundLine(vec2 p, vec2 a, vec2 b) {
b -= a + vec2(1.0,0.);
p -= a;
float f = length(p-clamp(dot(p,b)/dot(b,b),0.0,1.0)*b);
if (u_resolution.y < 320.) // attempt to get rid of aliasing on small resolution
if (uResolution.y < 320.) // attempt to get rid of aliasing on small resolution
return smoothstep(1.0, 0.9, f);
else if (u_resolution.y < 720.)
else if (uResolution.y < 720.)
return smoothstep(0.75, 0.5, f);
else
return smoothstep(1., 0., f);
@ -196,7 +196,7 @@ float vt220Font(vec2 p, float c) {
// https://www.shadertoy.com/view/llSXDV (same author as VT220 font rendering)
//
float textLines(vec2 uvG) {
float wt = 5. * (u_time + 0.5*sin(u_time*1.4) + 0.2*sin(u_time*2.9)); // wobbly time
float wt = 5. * (uTime + 0.5*sin(uTime*1.4) + 0.2*sin(uTime*2.9)); // wobbly time
vec2 uvGt = uvG + vec2(0., floor(wt));
float ll = rand(vec2(uvGt.y, - 1.)) * ROWCOLS.x; // line length
@ -275,7 +275,7 @@ float fbm( in vec2 _st) {
// XXX: TODO: use two shaders, the first on a MUCH lower resolution (one pixel for each text character)
// XXX: TODO: then the second should map those pixel values to higher resolution text characters
void main() {
vec2 uv = gl_FragCoord.xy / u_resolution;
vec2 uv = gl_FragCoord.xy / uResolution;
vec2 st = uv * SCALE;
// // uvNoise = ceil(uvNoise * ROWCOLS) / ROWCOLS;
@ -295,13 +295,13 @@ void main() {
// gl_FragColor = vt220Font(uvT - uvG * FONT_SIZE, val) * PHOSPHOR_COL + BG_COL;
vec2 q = vec2(
fbm( st + 0.*u_time),
fbm( st + 0.*uTime),
fbm( st + vec2(1.0))
);
vec2 r = vec2(
fbm( st + 1.0*q + vec2(1.7,9.2)+ 0.15*u_time ),
fbm( st + 1.0*q + vec2(8.3,2.8)+ 0.126*u_time)
fbm( st + 1.0*q + vec2(1.7,9.2)+ 0.15*uTime ),
fbm( st + 1.0*q + vec2(8.3,2.8)+ 0.126*uTime)
);
float f = fbm(st+r);

23
www/shaders/sample.glsl Normal file
View file

@ -0,0 +1,23 @@
precision mediump float;
// uniform float uTime;
uniform vec2 uResolution;
void main() {
vec2 uv = gl_FragCoord.xy / uResolution.xy;
// vec3 col = 0.5 + 0.5 * cos(uTime + uv.xyx + vec3(0, 2, 4));
// gl_FragColor = vec4(col, 1.0);
// gl_FragColor = vec4(216., 43., 72., 255.) / 255.;
// float maxfc = max(gl_FragCoord.x, gl_FragCoord.y);
// gl_FragColor = vec4(gl_FragCoord.xy, maxfc, maxfc) / maxfc;
float maxuv = max(uv.x, uv.y);
gl_FragColor = vec4(34., 43., 192.*maxuv, 255.) / 255.;
// vec3 col = 0.5 + 0.5*cos(uv.xyx+vec3(0,2,4));
// gl_FragColor = vec4(col, 1.);
}

28
www/shaders/segfault.glsl
View file

@ -11,8 +11,8 @@
precision mediump float;
#endif
uniform float u_time;
uniform vec2 u_resolution;
uniform float uTime;
uniform vec2 uResolution;
/* ==== Text Colouring ==== */
#define PHOSPHOR_COL vec4(196./255., 167./255., 231./255., 1.)
@ -155,9 +155,9 @@ float roundLine(vec2 p, vec2 a, vec2 b) {
b -= a + vec2(1.0,0.);
p -= a;
float f = length(p-clamp(dot(p,b)/dot(b,b),0.0,1.0)*b);
if (u_resolution.y < 320.) // attempt to get rid of aliasing on small resolution
if (uResolution.y < 320.) // attempt to get rid of aliasing on small resolution
return smoothstep(1.0, 0.9, f);
else if (u_resolution.y < 720.)
else if (uResolution.y < 720.)
return smoothstep(0.75, 0.5, f);
else
return smoothstep(1., 0., f);
@ -305,7 +305,7 @@ float vt220Font(vec2 p, float c) {
// https://www.shadertoy.com/view/MsdGWn
//
float textLines(vec2 uvG) {
float wt = 5. * (u_time + 0.5*sin(u_time*1.4) + 0.2*sin(u_time*2.9)); // wobbly time
float wt = 5. * (uTime + 0.5*sin(uTime*1.4) + 0.2*sin(uTime*2.9)); // wobbly time
vec2 uvGt = uvG + vec2(0., floor(wt));
float ll = rand(vec2(uvGt.y, - 1.)) * ROWCOLS.x; // line length
@ -351,21 +351,21 @@ float smokeNoise(vec3 v) {
}
void main() {
vec2 uv = vec2(gl_FragCoord.x, u_resolution.y - gl_FragCoord.y);
vec2 uvT = ROWCOLS * FONT_SIZE * uv / u_resolution.xy;
vec2 uvG = floor(ROWCOLS * uv / u_resolution.xy);
vec2 uvC = gl_FragCoord.xy / u_resolution.xy;
vec2 uv = vec2(gl_FragCoord.x, uResolution.y - gl_FragCoord.y);
vec2 uvT = ROWCOLS * FONT_SIZE * uv / uResolution.xy;
vec2 uvG = floor(ROWCOLS * uv / uResolution.xy);
vec2 uvC = gl_FragCoord.xy / uResolution.xy;
vec2 uvNoise = gl_FragCoord.xy / u_resolution.xy;
vec2 uvNoise = gl_FragCoord.xy / uResolution.xy;
uvNoise = ceil(uvNoise * ROWCOLS) / ROWCOLS;
float val;
if (u_time < 2.0)
if (uTime < 2.0)
val = textLines(uvG);
else if (u_time < 2.3)
val = rand(uvG * u_time) * 17.;
else if (uTime < 2.3)
val = rand(uvG * uTime) * 17.;
else {
float noise = smokeNoise(vec3(uvNoise * noiseScale, u_time * noiseTimeScale));
float noise = smokeNoise(vec3(uvNoise * noiseScale, uTime * noiseTimeScale));
// Noise is fed through a sigmoid function, then quantised to integer range 0-17
val = (exp(noise) / 2.71828); // increase contrast (normalised 0.0 - 1.0)
val = 1.0 / val;

12
www/shaders/trivial.glsl
View file

@ -1,17 +1,17 @@
// is highp wasteful for this shader?
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
precision highp float;
#else
precision mediump float;
precision mediump float;
#endif
uniform float u_time;
uniform vec2 u_resolution;
uniform float uTime;
uniform vec2 uResolution;
void main() {
vec2 uv = gl_FragCoord.xy / u_resolution;
vec2 uv = gl_FragCoord.xy / uResolution;
vec3 col = 0.5 + 0.5 * cos(u_time + uv.xyx + vec3(0, 2, 4));
vec3 col = 0.5 + 0.5 * cos(uTime + uv.xyx + vec3(0, 2, 4));
gl_FragColor = vec4(col,1.0);
}