21 lines
851 B
C++
21 lines
851 B
C++
#pragma once
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#include <vector>
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#include <cstddef>
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#include <core/types.h>
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namespace geom {
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// Generate per-vertex tangents with a robust fallback when MikkTSpace is not available.
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// - Fills Vertex.tangent (xyz = tangent, w = handedness sign for B = sign * cross(N, T))
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// - Expects valid normals and UVs; if UVs are degenerate, builds an arbitrary orthonormal basis.
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void generate_tangents(std::vector<Vertex>& vertices, const std::vector<uint32_t>& indices);
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// Range variant for submeshes (indices [indexStart, indexStart+indexCount), vertices [vertexStart, vertexStart+vertexCount))
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void generate_tangents_range(std::vector<Vertex>& vertices, const std::vector<uint32_t>& indices,
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size_t indexStart, size_t indexCount,
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size_t vertexStart, size_t vertexCount);
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} // namespace geom
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