Merge "Actually use the int based hash in 2d simplex." into main (d457b76a) · Commits · e / os / android_frameworks_libs_systemui

weathereffects/assets/shaders/simplex2d.agsl

+7 −7

Original line number	Diff line number	Diff line
		@@ -35,7 +35,7 @@ int imod(int a, int b) {
		}

		// 2D hash without bit-wise operations
		vec2 hash(vec2 p) {
		vec2 ihash2d(vec2 p) {
		int a = int(p.x + p.y) * 15823;
		int b = a * 65536; // a << 16

		@@ -89,9 +89,9 @@ float simplex2d_flow(vec2 p, float rot, float time) {
		vec2 v2 = v0 - 1.0 + 2.*UNSKEW;

		// Get random gradient vector.
		vec2 g0 = hash2d(i);
		vec2 g1 = hash2d(i+walk);
		vec2 g2 = hash2d(i+1.0);
		vec2 g0 = ihash2d(i);
		vec2 g1 = ihash2d(i+walk);
		vec2 g2 = ihash2d(i+1.0);

		// Make the gradient vectors dynamic by adding rotations.
		g0 += getVectorFromAngle(rot * time * hash1d(i));
		@@ -118,9 +118,9 @@ float simplex2d(vec2 p) {
		vec2 v2 = v0 - 1.0 + 2.*UNSKEW;

		// Get random gradient vector.
		vec2 g0 = hash2d(i);
		vec2 g1 = hash2d(i+walk);
		vec2 g2 = hash2d(i+1.0);
		vec2 g0 = ihash2d(i);
		vec2 g1 = ihash2d(i+walk);
		vec2 g2 = ihash2d(i+1.0);

		return kernel_summation(v0, v1, v2, g0, g1, g2);
		}