#ifndef COMMON_INCLUDED
#define COMMON_INCLUDED

layout(binding=1) uniform highp sampler2D u_height_sampler;
layout(binding=2) uniform highp sampler2D u_normal_sampler;

const vec3 c_normal_scale = vec3(2.0, 2.0, 1.0);
const vec3 c_normal_shift = vec3(-1.0, -1.0, 0.0);
const vec2 c_st_scale = vec2(1.0 / 1023.0, 1.0 / 1023.0);
const vec2 c_terrain_scale = vec2(1.0 / 2048.0, -1.0 / 2048.0);
const vec2 c_terrain_shift = vec2(0.5, 0.5);
const float c_weight_scale = 1.0 / 64.f;
const vec3 c_world_forward = vec3(0.0, 1.0, 0.0);

out vec4 v_position; // view space
out vec4 v_normal; // view space
out vec4 v_terrain_normal; // view space (x, y, z, weigth)
out vec4 v_texcoord; // texture space (s, t, pixel_level, material_level)

#endif // COMMON_INCLUDED