GamePlay/samples/browser/res/common/water/watersample.vert

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// Attributes
attribute vec4 a_position;
attribute vec2 a_texCoord;

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// Uniforms
uniform mat4 u_worldMatrix;
uniform mat4 u_worldViewProjectionMatrix;
uniform mat4 u_worldViewProjectionReflectionMatrix;

uniform vec3 u_cameraPosition;

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// Varyings
varying vec4 v_vertexRefractionPosition;
varying vec4 v_vertexReflectionPosition;

varying vec2 v_texCoord;

varying vec3 v_eyePosition;

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void main()
{
    v_vertexRefractionPosition = u_worldViewProjectionMatrix * a_position;
    v_vertexReflectionPosition = u_worldViewProjectionReflectionMatrix * a_position;

    gl_Position = v_vertexRefractionPosition;

    v_texCoord = a_texCoord;

    v_eyePosition = u_cameraPosition - (u_worldMatrix * a_position).xyz;
}