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54950c4284
* Tidyup `varfont_shader_puzzle` * Add a rebuild script and a test * Simplify fragment shaders * Drop web * Enable `beta` CI * make it `beta` inclusive * Pull out the program loading code
32 lines
748 B
GLSL
32 lines
748 B
GLSL
// Copyright 2023 The Flutter team. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#define PI 3.1415926538
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uniform float uTime;
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uniform vec2 uSize;
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uniform float uDampener;
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out vec4 fragColor;
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uniform sampler2D uTexture;
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void main()
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{
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float piTime = uTime * PI * 2;
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vec2 texCoord = gl_FragCoord.xy / uSize.xy;
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int speed;
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// wavy
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speed = 1;
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float xAdj = texCoord.x * 3 * PI;
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float waveFnVal = sin((xAdj + piTime * speed));
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float hackAdj = 0.0;
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float offset = ( ((pow(waveFnVal, 2) * 0.5 - 0.5) * 0.2) + hackAdj ) * uDampener;
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vec2 offsetTexCoord = vec2(texCoord.x, texCoord.y + offset);
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fragColor = texture(uTexture, offsetTexCoord);
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}
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