#version 330 core
layout (location = 0) in vec3 aPos;

out vec3 TexCoords;

uniform float u_Time;
uniform float u_ScrollSpeed;
uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;

void main() {
  TexCoords = aPos;

  /* Rotate texture coords around Y axis for scrolling. */
  float angle = u_Time * u_ScrollSpeed;
  mat3 rot = mat3(cos(angle), 0, sin(angle), 0, 1, 0, -sin(angle), 0, cos(angle));
  TexCoords = rot * TexCoords;

  gl_Position = projection * view * model * vec4(aPos, 1.0);
}