/*
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  Photon Shader by SixthSurge

  program/gbuffers_armor_glint:
  Handle enchantment glint

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*/

#include "/include/global.glsl"

out vec2 uv;

uniform sampler2D noisetex;

uniform mat4 gbufferModelView;
uniform mat4 gbufferModelViewInverse;
uniform mat4 gbufferProjection;
uniform mat4 gbufferProjectionInverse;

uniform vec3 cameraPosition;

uniform float near;
uniform float far;

uniform ivec2 atlasSize;

uniform float frameTimeCounter;
uniform float rainStrength;

uniform vec2 taa_offset;
uniform vec3 light_dir;

#include "/include/utility/space_conversion.glsl"
#include "/include/vertex/displacement.glsl"

void main() {
    uv = mat2(gl_TextureMatrix[0]) * gl_MultiTexCoord0.xy +
        gl_TextureMatrix[0][3].xy;

    vec3 pos = transform(gl_ModelViewMatrix, gl_Vertex.xyz);
    pos = view_to_scene_space(pos);
    pos = pos + cameraPosition;
    pos = animate_vertex(pos, false, 1.0, 0);
    pos = pos - cameraPosition;

    vec3 view_pos = scene_to_view_space(pos);
    vec4 clip_pos = project(gl_ProjectionMatrix, view_pos);

#if defined TAA && defined TAAU
    clip_pos.xy = clip_pos.xy * taau_render_scale +
        clip_pos.w * (taau_render_scale - 1.0);
    clip_pos.xy += taa_offset * clip_pos.w;
#elif defined TAA
    clip_pos.xy += taa_offset * clip_pos.w * 0.66;
#endif

    gl_Position = clip_pos;
}