// Copyright 2018 Google Inc.
attribute vec4 a_position;
attribute vec3 a_normal;
attribute vec4 a_color;
attribute vec3 a_texcoord0;
varying vec4 v_color;
varying vec3 v_normal;
varying vec3 v_position;
varying vec2 v_texcoord0;
varying vec3 v_light_dir_0;
varying vec3 v_light_dir_1;
varying float f_fog_coord;
uniform mat4 modelMatrix;
uniform mat4 viewMatrix;
uniform mat4 modelViewMatrix;
uniform mat4 projectionMatrix;
uniform mat3 normalMatrix;
uniform mat4 u_SceneLight_0_matrix;
uniform mat4 u_SceneLight_1_matrix;
uniform vec4 u_time;
void main() {
float t, uTileRate, waveIntensity;
float radius = a_texcoord0.z;
t = u_time.z;
uTileRate = 10.0;
waveIntensity = .6;
vec4 pos = a_position;
float theta = mod(a_texcoord0.y, 1.0);
float pulseIntensity = 1.0 -(sin(t + a_texcoord0.x * uTileRate + theta * 10.0) + 1.0);
pulseIntensity *= pulseIntensity;
pos.xyz += pulseIntensity * a_normal.xyz * waveIntensity * radius;
gl_Position = projectionMatrix * modelViewMatrix * pos;
f_fog_coord = gl_Position.z;
v_position = pos.xyz;
v_normal = normalMatrix * a_normal;
v_light_dir_0 = mat3(u_SceneLight_0_matrix) * vec3(0, 0, 1);
v_light_dir_1 = mat3(u_SceneLight_1_matrix) * vec3(0, 0, 1);
v_color = a_color;
v_texcoord0 = a_texcoord0.xy;
}