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🔧 Use generic i/o names

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This commit is contained in:
Simon Schneegans
2022-05-28 05:56:04 +02:00
parent c635336a7e
commit 74bd7cdef8
13 changed files with 152 additions and 127 deletions
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resources/shaders/matrix.frag
+14 -14
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@@ -47,13 +47,13 @@ float getText(vec2 fragCoord) {
// to one below each drop and to zero above it. This second value is used for fading
// the window texture.
vec2 getRain(vec2 fragCoord) {
float column = cogl_tex_coord_in[0].x * uSize.x;
float column = iTexCoord.x * uSize.x;
column -= mod(column, uLetterSize);
float delay = fract(sin(column) * 78.233) * mix(0.0, 1.0, uRandomness);
float speed = fract(cos(column) * 12.989) * mix(0.0, 0.3, uRandomness) + 1.5;
float distToDrop = (uProgress * 2 - delay) * speed - cogl_tex_coord_in[0].y;
float distToDrop = (uProgress * 2 - delay) * speed - iTexCoord.y;
float rainAlpha = distToDrop >= 0 ? exp(-distToDrop / TRAIL_LENGTH) : 0;
float windowAlpha = 1 - clamp(uSize.y * distToDrop, 0, FADE_WIDTH) / FADE_WIDTH;
@@ -64,8 +64,8 @@ vec2 getRain(vec2 fragCoord) {
// Add some variation to the drop start and end position.
float shorten =
fract(sin(column + 42.0) * 33.423) * mix(0.0, uOverShoot * 0.25, uRandomness);
rainAlpha *= smoothstep(0, 1, clamp(cogl_tex_coord_in[0].y / shorten, 0, 1));
rainAlpha *= smoothstep(0, 1, clamp((1.0 - cogl_tex_coord_in[0].y) / shorten, 0, 1));
rainAlpha *= smoothstep(0, 1, clamp(iTexCoord.y / shorten, 0, 1));
rainAlpha *= smoothstep(0, 1, clamp((1.0 - iTexCoord.y) / shorten, 0, 1));
if (uForOpening) {
windowAlpha = 1.0 - windowAlpha;
@@ -75,7 +75,7 @@ vec2 getRain(vec2 fragCoord) {
}
void main() {
vec2 coords = cogl_tex_coord_in[0].st;
vec2 coords = iTexCoord.st;
coords.y = coords.y * (uOverShoot + 1.0) - uOverShoot * 0.5;
// Get a cool matrix effect. See comments for those methods above.
@@ -83,15 +83,15 @@ void main() {
float textMask = getText(coords);
// Get the window texture.
cogl_color_out = texture2D(uTexture, coords);
oColor = texture2D(uTexture, coords);
// Shell.GLSLEffect uses straight alpha. So we have to convert from premultiplied.
if (cogl_color_out.a > 0) {
cogl_color_out.rgb /= cogl_color_out.a;
if (oColor.a > 0) {
oColor.rgb /= oColor.a;
}
// Fade the window according to the effect mask.
cogl_color_out.a *= rainMask.y;
oColor.a *= rainMask.y;
// This is used to fade out the remaining trails in the end.
float finalFade =
@@ -99,12 +99,12 @@ void main() {
float rainAlpha = finalFade * rainMask.x;
// Add the matrix effect to the window.
vec4 text = vec4(mix(uTrailColor, uTipColor, min(1, pow(rainAlpha + 0.1, 4))),
vec4 text = vec4(mix(uTrailColor, uTipColor, min(1, pow(rainAlpha + 0.1, 4))),
rainAlpha * textMask);
cogl_color_out = alphaOver(cogl_color_out, text);
oColor = alphaOver(oColor, text);
// These are pretty useful for understanding how this works.
// cogl_color_out = vec4(vec3(textMask), 1);
// cogl_color_out = vec4(vec3(rainMask.x), 1);
// cogl_color_out = vec4(vec3(rainMask.y), 1);
// oColor = vec4(vec3(textMask), 1);
// oColor = vec4(vec3(rainMask.x), 1);
// oColor = vec4(vec3(rainMask.y), 1);
}