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Wrap time in AnimatedGradientFill to keep gradient smooth #40

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Wrap time in AnimatedGradientFill to keep gradient smooth #40

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5 changes: 4 additions & 1 deletion Sources/Inferno/Shaders/Transformation/AnimatedGradientFill.metal
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Original file line number Diff line number Diff line change
Expand Up @@ -27,10 +27,13 @@ using namespace metal;
// Get the same UV in the range -1 to 1, so that
// 0 is in the center.
half2 rp = uv * 2.0h - 1.0h;

// Wrap the time value to prevent it from becoming too large
float wrappedTime = fmod(time, 2.0 * 3.1415927);

// Calculate the angle top this pixel, adding in time
// so it's constantly changing.
half angle = atan2(rp.y, rp.x) + time;
half angle = atan2(rp.y, rp.x) + wrappedTime;

// Send back variations on the sine of that angle, so we
// get a range of colors. The use of abs() here avoids
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