mirror of
https://github.com/MaSzyna-EU07/maszyna.git
synced 2026-10-17 15:39:20 +02:00
5f34d68e6f
Replaces heightfield with Cesium Quantized Mesh format (TIN).
Full replacement, not hybrid - TIN is the only terrain format.
Implemented:
- Format: quantizedmeshformat.h, quantizedmeshreader.h
- Triangulator: terraincooker_tin.{h,cpp} using CDT
- Cooker: terraincook now generates TIN by default
- Loader: terraintileloader fully rewritten for TIN
- GPU pool: terraintilepool_tin (VBO/IBO per tile)
- Renderer interface: terrainclipmap.cppm updated
- Shaders: terrainclipmap_tin.{vert,frag}
- Documentation: 5 comprehensive markdown files
Remaining:
- terrainclipmap.cpp render() method (partial, needs completion)
- Build testing and integration
- See TIN_INTEGRATION_GUIDE.md for next steps
Stats: 2700+ lines new code, ~50% vertex reduction expected
131 lines
3.9 KiB
C++
131 lines
3.9 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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module;
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#include <algorithm>
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#include <cstdint>
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#include <vector>
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#include <glad/glad.h>
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module eu07.rendering.terraintilepool_tin;
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import eu07.glm;
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terrain_tile_pool_tin::terrain_tile_pool_tin() = default;
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terrain_tile_pool_tin::~terrain_tile_pool_tin() = default;
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terrain_tile_pool_tin::tile_handle
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terrain_tile_pool_tin::upload(
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std::vector<double> const &positions_x,
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std::vector<double> const &positions_y,
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std::vector<double> const &positions_z,
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std::vector<float> const &uvs_u,
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std::vector<float> const &uvs_v,
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std::vector<std::uint8_t> const &materials,
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std::vector<std::uint32_t> const &indices,
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glm::dvec3 const &origin
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) {
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tile_handle handle;
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handle.origin = origin;
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if( positions_x.empty() || indices.empty() ) {
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return handle; // Invalid
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}
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std::size_t const vertex_count = positions_x.size();
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handle.vertex_count = static_cast<std::uint32_t>( vertex_count );
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handle.index_count = static_cast<std::uint32_t>( indices.size() );
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// Pack vertices into interleaved format
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std::vector<vertex> vertices;
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vertices.reserve( vertex_count );
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for( std::size_t i = 0; i < vertex_count; ++i ) {
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vertex v;
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// Store relative to origin for camera-relative rendering
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v.x = static_cast<float>( positions_x[ i ] - origin.x );
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v.y = static_cast<float>( positions_y[ i ] - origin.y );
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v.z = static_cast<float>( positions_z[ i ] - origin.z );
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v.u = uvs_u[ i ];
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v.v = uvs_v[ i ];
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v.material = i < materials.size() ? materials[ i ] : 0;
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v.pad[0] = v.pad[1] = v.pad[2] = 0;
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vertices.push_back( v );
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}
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// Create VAO
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glGenVertexArrays( 1, &handle.vao_id );
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glBindVertexArray( handle.vao_id );
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// Create and upload VBO
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glGenBuffers( 1, &handle.vbo_id );
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glBindBuffer( GL_ARRAY_BUFFER, handle.vbo_id );
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glBufferData( GL_ARRAY_BUFFER,
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vertices.size() * sizeof( vertex ),
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vertices.data(),
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GL_STATIC_DRAW );
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// Position attribute (location 0)
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glEnableVertexAttribArray( 0 );
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glVertexAttribPointer( 0, 3, GL_FLOAT, GL_FALSE, sizeof( vertex ),
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reinterpret_cast<void *>( offsetof( vertex, x ) ) );
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// UV attribute (location 1)
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glEnableVertexAttribArray( 1 );
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glVertexAttribPointer( 1, 2, GL_FLOAT, GL_FALSE, sizeof( vertex ),
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reinterpret_cast<void *>( offsetof( vertex, u ) ) );
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// Material attribute (location 2)
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glEnableVertexAttribArray( 2 );
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glVertexAttribIPointer( 2, 1, GL_UNSIGNED_BYTE, sizeof( vertex ),
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reinterpret_cast<void *>( offsetof( vertex, material ) ) );
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// Create and upload IBO
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glGenBuffers( 1, &handle.ibo_id );
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glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, handle.ibo_id );
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glBufferData( GL_ELEMENT_ARRAY_BUFFER,
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indices.size() * sizeof( std::uint32_t ),
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indices.data(),
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GL_STATIC_DRAW );
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// Cleanup
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glBindVertexArray( 0 );
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glBindBuffer( GL_ARRAY_BUFFER, 0 );
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glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, 0 );
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// Track allocation
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m_allocated_vertices += vertex_count;
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m_allocated_indices += indices.size();
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return handle;
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}
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void
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terrain_tile_pool_tin::free( tile_handle &Handle ) {
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if( !Handle.valid() ) return;
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// Free GL resources
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if( Handle.vao_id != 0 ) {
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glDeleteVertexArrays( 1, &Handle.vao_id );
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}
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if( Handle.vbo_id != 0 ) {
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glDeleteBuffers( 1, &Handle.vbo_id );
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}
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if( Handle.ibo_id != 0 ) {
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glDeleteBuffers( 1, &Handle.ibo_id );
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}
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// Update stats
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m_allocated_vertices -= Handle.vertex_count;
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m_allocated_indices -= Handle.index_count;
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// Invalidate handle
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Handle = tile_handle{};
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}
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