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You can now loop the effect. It's not super great, but it ought to make it easier to create repeating backgrounds or something.

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Rezmason
2021-12-21 02:22:20 -08:00
parent 62e9bfea82
commit 38f29ad21b
5 changed files with 44 additions and 14 deletions
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26
shaders/wgsl/rainPass.wgsl
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@@ -37,6 +37,7 @@ struct Config {
slantScale : f32;
slantVec : vec2<f32>;
volumetric : i32;
loops : i32;
highPassThreshold : f32;
};
@@ -127,14 +128,18 @@ fn wobble(x : f32) -> f32 {
fn getRainTime(simTime : f32, glyphPos : vec2<f32>) -> f32 {
var columnTimeOffset = randomFloat(vec2<f32>(glyphPos.x, 0.0)) * 1000.0;
var columnSpeedOffset = randomFloat(vec2<f32>(glyphPos.x + 0.1, 0.0)) * 0.5 + 0.5;
// columnSpeedOffset = 0.0; // TODO: loop
if (bool(config.loops)) {
columnSpeedOffset = 0.5;
}
var columnTime = columnTimeOffset + simTime * config.fallSpeed * columnSpeedOffset;
return (glyphPos.y * 0.01 + columnTime) / config.raindropLength;
}
fn getBrightness(rainTime : f32) -> f32 {
var value = 1.0 - fract(wobble(rainTime));
// value = 1.0 - fract(rainTime); // TODO: loop
if (bool(config.loops)) {
value = 1.0 - fract(rainTime);
}
return log(value * 1.25) * 3.0;
}
@@ -160,7 +165,9 @@ fn applySunShowerBrightness(brightness : f32, screenPos : vec2<f32>) -> f32 {
fn applyThunderBrightness(brightness : f32, simTime : f32, screenPos : vec2<f32>) -> f32 {
var thunderTime = simTime * 0.5;
var thunder = 1.0 - fract(wobble(thunderTime));
// thunder = 1.0 - fract(thunderTime + 0.3); // TODO: loop
if (bool(config.loops)) {
thunder = 1.0 - fract(thunderTime + 0.3);
}
thunder = log(thunder * 1.5) * 4.0;
thunder = clamp(thunder, 0.0, 1.0);
@@ -174,10 +181,14 @@ fn applyRippleEffect(effect : f32, simTime : f32, screenPos : vec2<f32>) -> f32
}
var rippleTime = (simTime * 0.5 + sin(simTime) * 0.2) * config.rippleSpeed + 1.0; // TODO: clarify
// rippleTime = (simTime * 0.5) * config.rippleSpeed + 1.0; // TODO: loop
if (bool(config.loops)) {
rippleTime = (simTime * 0.5) * config.rippleSpeed + 1.0;
}
var offset = randomVec2(vec2<f32>(floor(rippleTime), 0.0)) - 0.5;
// offset = vec2<f32>(0.0); // TODO: loop
if (bool(config.loops)) {
offset = vec2<f32>(0.0);
}
var ripplePos = screenPos * 2.0 - 1.0 + offset;
var rippleDistance : f32;
if (config.rippleType == 0) {
@@ -225,7 +236,10 @@ fn computeResult (isFirstFrame : bool, previousResult : vec4<f32>, glyphPos : ve
// Determine the glyph's cycle— the percent this glyph has progressed through the glyph sequence
var previousCycle = previousResult.g;
var resetGlyph = isFirstFrame; // || previousBrightness <= 0.0; // TODO: loop
var resetGlyph = isFirstFrame;
if (bool(config.loops)) {
resetGlyph = resetGlyph || previousBrightness < 0.0;
}
if (resetGlyph) {
previousCycle = select(randomFloat(screenPos), 0.0, bool(config.showComputationTexture));
}