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🔧 Reduce number of implicit calls

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This commit is contained in:
Simon Schneegans
2022-06-10 08:24:42 +02:00
parent f44d0ae5b6
commit 6fb56612e2
10 changed files with 63 additions and 62 deletions
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resources/shaders/matrix.frag
+9 -8
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@@ -21,8 +21,8 @@ uniform float uRandomness;
uniform float uOverShoot;
// These may be configurable in the future.
const float EDGE_FADE = 30;
const float FADE_WIDTH = 150;
const float EDGE_FADE = 30.0;
const float FADE_WIDTH = 150.0;
const float TRAIL_LENGTH = 0.2;
const float FINAL_FADE_START_TIME = 0.8;
const float LETTER_TILES = 16.0;
@@ -55,8 +55,8 @@ vec2 getRain(vec2 fragCoord) {
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;
float rainAlpha = distToDrop >= 0.0 ? exp(-distToDrop / TRAIL_LENGTH) : 0.0;
float windowAlpha = 1.0 - clamp(uSize.y * distToDrop, 0.0, FADE_WIDTH) / FADE_WIDTH;
// Fade at window borders.
rainAlpha *= getAbsoluteEdgeMask(EDGE_FADE, 0.5);
@@ -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(iTexCoord.y / shorten, 0, 1));
rainAlpha *= smoothstep(0, 1, clamp((1.0 - iTexCoord.y) / shorten, 0, 1));
rainAlpha *= smoothstep(0.0, 1.0, clamp(iTexCoord.y / shorten, 0.0, 1.0));
rainAlpha *= smoothstep(0.0, 1.0, clamp((1.0 - iTexCoord.y) / shorten, 0.0, 1.0));
if (uForOpening) {
windowAlpha = 1.0 - windowAlpha;
@@ -90,11 +90,12 @@ void main() {
// This is used to fade out the remaining trails in the end.
float finalFade =
1 - clamp((uProgress - FINAL_FADE_START_TIME) / (1 - FINAL_FADE_START_TIME), 0, 1);
1 -
clamp((uProgress - FINAL_FADE_START_TIME) / (1.0 - FINAL_FADE_START_TIME), 0.0, 1.0);
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(1.0, pow(rainAlpha + 0.1, 4.0))),
rainAlpha * textMask);
oColor = alphaOver(oColor, text);