audio-vis/shaders/wave.vert

#version 300 es

in vec3 a_position;
uniform mat4 u_matrix;

out vec3 pos;

void main() {
    // convert the position from pixels to 0.0 to 1.0
    vec4 scale = vec4(a_position, 1) * u_matrix;
    scale.y = scale.y * 0.85;
    gl_Position = scale;
    pos = a_position;
}