Height based custom material - vertex shader.

uniform float m_tilingFactor;
uniform mat4 g_WorldViewProjectionMatrix;
uniform mat4 g_WorldMatrix;
uniform mat3 g_NormalMatrix;
uniform vec4 g_LightDirection;
uniform vec4 g_LightPosition;

uniform float m_terrainSize;

attribute vec4 inTexCoord;
attribute vec3 inNormal;
attribute vec3 inPosition;

varying vec3 normal;
varying vec4 position;

void main()
{
    normal = normalize(inNormal);
    position = g_WorldMatrix * vec4(inPosition, 0.0);
        gl_Position = g_WorldViewProjectionMatrix * vec4(inPosition, 1);
}