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feat(render): matte and tinted copies of a material, the steel weathered or tinted as far as the userdata of its vertices says

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Matte_Material() gives a copy of a material with its glossiness damped and its weathering on: the faces cut out of a polished surface, as the sides of a worn rail head, darken and lose the shine by the userdata of their vertices. Tinted_Material() gives a copy whose texture is tinted to a colour as far instead. Both are made once per material.

The weathering and the tint colour have a param slot of their own, param[3]: the shaders of the materials use all four components of param[2] among them (detail, parallax, water, the terrain placement), and light_common.glsl is included in all of them. MAX_PARAMS grows from 3 to 4, the model UBO by 16 bytes. Neither copy is made when another param of the shader lies on the components it would set.
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maj00r
2026-11-03 21:50:32 +01:00
parent a24118baf7
commit 89c4555e1e
4 changed files with 143 additions and 1 deletions
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7
model/material.h
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@@ -142,6 +142,11 @@ public:
// material described by provided text (the content of a .mat file), not kept in a file. returns: handle to the material or null_handle
material_handle
create_from_text( std::string const &Name, std::string const &Definition );
// copy of provided material with its specular highlights and reflections damped. returns: handle to the copy, made once per material
material_handle
create_matte( material_handle const Material );
material_handle
create_tinted( material_handle const Material, glm::vec3 const &Colour );
opengl_material const &
material( material_handle const Material ) const { return m_materials[ Material ]; }
opengl_material &
@@ -170,6 +175,8 @@ private:
// members:
material_sequence m_materials;
index_map m_materialmappings;
std::unordered_map<material_handle, material_handle> m_mattes;
std::map<std::tuple<material_handle, float, float, float>, material_handle> m_tints;
};
//---------------------------------------------------------------------------