struct LightSourceParameters
{
	vec4 position;
	vec4 diffuse;
	vec4 specular;
};

struct BasicMaterialParameters
{
	vec4 diffuse;
	vec4 specular;
	vec4 emission;
	float shininess;
	float reflectivity;
};

struct PbrMaterialParameters
{
	vec4 base_color;
	vec4 emission;
	float metalness;
	float roughness;
};

struct ClipPlane
{
	vec4 equation;
};

uniform mat4 eye_obj_matrix;
uniform mat3 eye_obj_normal_matrix;
uniform Transform
{
	mat4 eye_world_matrix;
	mat4 projection_matrix;
};

uniform BasicMaterial
{
	BasicMaterialParameters basic_material;
};

uniform PbrMaterial
{
	PbrMaterialParameters pbr_material;
};

uniform Lighting
{
	// Declared as an array for compatibility reasons
	LightSourceParameters light_sources[1];
	vec4 ambient_color;
	vec4 sky_color;
	vec3 eye_zenith_dir;
	float horizon_limit;
	vec4 fog_color;
	float fog_density;
};

uniform sampler2D diffuse_map;
uniform sampler2D specular_map;
uniform sampler2D shininess_map;
uniform sampler2D base_color_map;
uniform sampler2D metalness_map;
uniform sampler2D roughness_map;
uniform sampler2D occlusion_map;
uniform sampler2D emission_map;
uniform sampler2D normal_map;

uniform sampler2DShadow shadow_map;
uniform ShadowMap
{
	float shadow_darkness;
	mat4 shd_eye_matrix;
};

uniform samplerCube environment_map;
uniform EnvMap
{
	mat3 env_eye_matrix;
};

const int max_clip_planes = 0;
uniform Clipping
{
	ClipPlane clip_planes[max_clip_planes];
};

#pragma MSP stage(vertex)
layout(location=0) in vec4 vertex;
layout(location=8) in vec4 texcoord;
layout(location=3) in vec4 color;
layout(location=2) in vec3 normal;
layout(location=4) in vec3 tangent;
layout(location=5) in vec3 binormal;
layout(location=12) in vec4 instance_transform[3];

#pragma MSP stage(fragment)
layout(location=0) out vec4 frag_color;