| precision mediump float; | |
| attribute vec4 a_position; | |
| attribute vec2 a_texCoord; | |
| uniform mat4 u_projectionMatrix; | |
| uniform float offset; | |
| varying vec2 v_texCoord; | |
| void main() | |
| { | |
| gl_Position = u_projectionMatrix * (a_position + vec4(0.0, offset, 0.0, 0.0)); | |
| v_texCoord = a_texCoord; | |
| } |