// Skybox shader

#type vertex
#version 430

layout(location = 0) in vec3 a_Position;

uniform mat4 u_InverseVP;

out vec3 v_Position;

void main()
{
	vec4 position = vec4(a_Position.xy, 1.0, 1.0);
	gl_Position = position;

	v_Position = (u_InverseVP * position).xyz;
}

#type fragment
#version 430

layout(location = 0) out vec4 finalColor;

uniform samplerCube u_Texture;
uniform float u_TextureLod;
uniform float u_SkyIntensity;

in vec3 v_Position;

void main()
{
	vec3 color = textureLod(u_Texture, v_Position, u_TextureLod).rgb * u_SkyIntensity;
	finalColor =  vec4(color, 1.0);

}