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Code Issues 152 Wiki Activity

feat(renderer): a matte variant of a material for the parts of rails no wheel rolls on: it lights the same maps as weathered steel, with the weathering scaled per vertex by userdata, so a polished running surface fades into unused steel without a bright stripe; the cut faces of rails are drawn in it in an extra pass

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maj00r
2026-10-13 18:30:16 +02:00
parent c7f9796387
commit 7e1b2c553c
7 changed files with 133 additions and 0 deletions
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48
model/material.cpp
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@@ -662,6 +662,54 @@ material_manager::create_from_text( std::string const &Name, std::string const &
return materialhandle;
}
material_handle
material_manager::create_matte( material_handle const Material ) {
if( Material == null_handle || Material >= m_materials.size() ) {
return Material;
}
auto const lookup { m_mattes.find( Material ) };
if( lookup != m_mattes.end() ) {
return lookup->second;
}
auto const &source { m_materials[ Material ] };
opengl_material matte;
matte.textures = source.textures;
matte.texture_variants = source.texture_variants;
matte.params = source.params;
matte.params_state = source.params_state;
matte.shader = source.shader;
matte.opacity = source.opacity;
matte.selfillum = source.selfillum;
matte.glossiness = 0.1f;
matte.shadow_rank = source.shadow_rank;
matte.name = source.name + ":matte";
matte.size = source.size;
matte.is_good = source.is_good;
matte.path = source.path;
if( matte.shader ) {
for( auto const &[ key, value ] : std::vector<std::pair<std::string, glm::vec4>>{ { "weathering", glm::vec4{ 1.f } } } ) {
auto const entry { matte.shader->param_conf.find( key ) };
if( entry == matte.shader->param_conf.end() ) {
continue;
}
for( std::size_t i = 0; i < entry->second.size; ++i ) {
matte.params[ entry->second.location ][ entry->second.offset + i ] = value[ static_cast<glm::length_t>( i ) ];
}
matte.params_state.erase(
std::remove_if(
std::begin( matte.params_state ), std::end( matte.params_state ),
[&]( gl::shader::param_entry const &State ) {
return State.location == entry->second.location && State.offset == entry->second.offset; } ),
std::end( matte.params_state ) );
}
}
auto const mattehandle { static_cast<material_handle>( m_materials.size() ) };
m_materials.emplace_back( std::move( matte ) );
m_mattes.emplace( Material, mattehandle );
return mattehandle;
}
void
material_manager::on_weather_change() {