#version 320 es | |
// Copyright 2013 The Flutter Authors. All rights reserved. | |
// Use of this source code is governed by a BSD-style license that can be | |
// found in the LICENSE file. | |
precision highp float; | |
layout(location = 0) out vec4 fragColor; | |
layout(location = 0) uniform float a; | |
void main() { | |
fragColor = vec4( | |
// tan(0.0) = 0.0 | |
tan(0.0), | |
// tan(1.57079632679) = tan(pi / 4.0) = 1.0 | |
tan(a * 0.785398163), 0.0, 1.0); | |
} |