#version 330 core

layout(location = 0) in vec3 vertexPosition_modelspace;
layout(location = 1) in vec3 vertexNormal;

out vec2 UV;
out vec3 normIn;
out vec3 camDirIn;
out vec3 lightDirIn;
//out vec3 vertPos;

uniform mat4 MVP;
uniform mat4 worldMat;

const vec3 Tuning_LightPos = vec3(1, 1, 1.0);

void main()
{
  gl_Position = MVP * vec4(vertexPosition_modelspace,1);
  UV = (vertexPosition_modelspace.xy+vec2(1,1))/2.0;
  normIn = vertexNormal;
  
  mat3 invWorldRot = transpose(mat3(worldMat[0].xyz, worldMat[1].xyz, worldMat[2].xyz));
  //mat3 invWorldRot = mat3(1.0f);
  vec3 worldPos = (worldMat * vec4(vertexPosition_modelspace,1)).xyz;
  camDirIn = invWorldRot * (vec3(0,0,1) - worldPos);
  //camDir = worldPos;
  lightDirIn = invWorldRot * (Tuning_LightPos - worldPos);
  //vec4 vertPos4 =  vec4(vertexPosition_modelspace,1);
  //vertPos = vec3(vertPos4) / vertPos4.w;
}