#version 430 compatibility 
layout(location = 0) in vec3 vertexPosition;
layout(location = 1) in vec3 vertexNormal;

out vec3 interpNormal;
out vec3 fragPos;
out vec3 TexCoords;
out vec3 incident;
out float v_fresnel;

uniform vec3 viewPos;
uniform mat4 modelMatrix;
uniform mat4 modelViewProjectionMatrix;

layout (binding = 0) uniform samplerCube tex_map;

void main()
{
	vec4 vertex = modelMatrix * vec4( vertexPosition, 1.0 );
	vec4 camera = vec4( viewPos, 1.0 );
	incident = normalize( vec3( vertex - camera ) );
	interpNormal = mat3(transpose(inverse(modelMatrix))) * vertexNormal;
	fragPos = (modelMatrix * vec4(vertexPosition, 1.0)).xyz;
	gl_Position = modelViewProjectionMatrix * vec4(vertexPosition, 1.0);
}