// Copyright 2018 Google Inc.
attribute vec4 a_position;
attribute vec3 a_normal;
attribute vec4 a_color;
attribute vec2 a_texcoord0;
attribute vec3 a_texcoord1;
varying vec4 v_color;
varying vec3 v_normal;
varying vec3 v_position;
varying vec2 v_texcoord0;
uniform mat4 modelViewMatrix;
uniform mat4 projectionMatrix;
uniform mat3 normalMatrix;
uniform mat4 modelMatrix;
uniform mat4 viewMatrix;
uniform vec4 u_time;
uniform float u_ScrollRate;
uniform vec3 u_ScrollDistance;
uniform float u_ScrollJitterIntensity;
uniform float u_ScrollJitterFrequency;
uniform float u_DisplacementIntensity;
void main() {
float envelope = sin(a_texcoord0.x * (3.14159));
float envelopePow = (1.0-pow(1.0 - envelope, 10.0));
vec3 offsetFromMiddleToEdge_CS = a_texcoord1.xyz;
float widthiness_CS = length(offsetFromMiddleToEdge_CS) / .02;
vec3 midpointPos_CS = a_position.xyz - offsetFromMiddleToEdge_CS;
float t = u_time.w;
vec3 worldPos = (modelMatrix * a_position).xyz;
worldPos.xyz = midpointPos_CS + offsetFromMiddleToEdge_CS * envelopePow;
worldPos = vec4(modelMatrix * vec4(worldPos.xyz, 1.0)).xyz;
vec3 dispVec = vec3(0., 0., 0.);
dispVec.x += sin(midpointPos_CS.z * 100.0 + t * 13.0 ) * 0.05;
dispVec.y += cos(midpointPos_CS.x * 120.0 + t * 10.0 ) * 0.05;
dispVec.z += cos(midpointPos_CS.y * 80.0 + t * 7.0 ) * 0.05;
dispVec = (modelMatrix * vec4(dispVec, 0.0)).xyz;
worldPos.xyz += widthiness_CS * dispVec * u_DisplacementIntensity * envelopePow;
gl_Position = projectionMatrix * viewMatrix * vec4(worldPos.x, worldPos.y, worldPos.z,1.0);
v_position = (modelViewMatrix * a_position).xyz;
v_color = a_color;
v_color += v_color * (1.0 - envelopePow);
v_texcoord0 = a_texcoord0;
v_normal = normalMatrix * a_normal;
}