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260287b3a1
While all the previous fixes to optimizeVertexCache invocation fixed the vertex transform efficiency, the import code still was missing two crucial recommendations from meshoptimizer documentation: - All meshes should be optimized for vertex cache (this reorders vertices for maximum fetch efficiency) - When LODs are used with a shared vertex buffer, the vertex order should be generated by doing a vertex fetch optimization on the concatenated index buffer from coarse to fine LODs; this maximizes fetch efficiency for coarse LODs The last point is especially crucial for Mali GPUs; unlike other GPUs where vertex order affects fetch efficiency but not shading, these GPUs have various shading quirks (depending on the GPU generation) that really require consecutive index ranges for each LOD, which requires the second optimization mentioned above. However all of these also help desktop GPUs and other mobile GPUs as well. Because this optimization is "global" in the sense that it affects all LODs and all vertex arrays in concert, I've taken this opportunity to isolate all optimization code in this function and pull it out of generate_lods and create_shadow_mesh; this doesn't change the vertex cache efficiency, but makes the code cleaner. Consequently, optimize_indices should be called after other functions like create_shadow_mesh / generate_lods. This required exposing meshopt_optimizeVertexFetchRemap; as a drive-by, meshopt_simplifySloppy was never used so it's not exposed anymore - this will simplify future meshopt upgrades if they end up changing the function's interface.
245 lines
11 KiB
C++
245 lines
11 KiB
C++
/**************************************************************************/
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/* surface_tool.h */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#ifndef SURFACE_TOOL_H
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#define SURFACE_TOOL_H
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#include "core/templates/local_vector.h"
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#include "scene/resources/mesh.h"
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#include "thirdparty/misc/mikktspace.h"
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class SurfaceTool : public RefCounted {
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GDCLASS(SurfaceTool, RefCounted);
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static const uint32_t custom_mask[RS::ARRAY_CUSTOM_COUNT];
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static const uint32_t custom_shift[RS::ARRAY_CUSTOM_COUNT];
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public:
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struct Vertex {
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Vector3 vertex;
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Color color;
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Vector3 normal; // normal, binormal, tangent
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Vector3 binormal;
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Vector3 tangent;
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Vector2 uv;
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Vector2 uv2;
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Vector<int> bones;
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Vector<float> weights;
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Color custom[RS::ARRAY_CUSTOM_COUNT];
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uint32_t smooth_group = 0;
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bool operator==(const Vertex &p_vertex) const;
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Vertex() {}
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};
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enum CustomFormat {
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CUSTOM_RGBA8_UNORM = RS::ARRAY_CUSTOM_RGBA8_UNORM,
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CUSTOM_RGBA8_SNORM = RS::ARRAY_CUSTOM_RGBA8_SNORM,
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CUSTOM_RG_HALF = RS::ARRAY_CUSTOM_RG_HALF,
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CUSTOM_RGBA_HALF = RS::ARRAY_CUSTOM_RGBA_HALF,
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CUSTOM_R_FLOAT = RS::ARRAY_CUSTOM_R_FLOAT,
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CUSTOM_RG_FLOAT = RS::ARRAY_CUSTOM_RG_FLOAT,
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CUSTOM_RGB_FLOAT = RS::ARRAY_CUSTOM_RGB_FLOAT,
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CUSTOM_RGBA_FLOAT = RS::ARRAY_CUSTOM_RGBA_FLOAT,
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CUSTOM_MAX = RS::ARRAY_CUSTOM_MAX
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};
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enum SkinWeightCount {
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SKIN_4_WEIGHTS,
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SKIN_8_WEIGHTS
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};
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enum {
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/* Do not move vertices that are located on the topological border (vertices on triangle edges that don't have a paired triangle). Useful for simplifying portions of the larger mesh. */
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SIMPLIFY_LOCK_BORDER = 1 << 0, // From meshopt_SimplifyLockBorder
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/* Improve simplification performance assuming input indices are a sparse subset of the mesh. Note that error becomes relative to subset extents. */
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SIMPLIFY_SPARSE = 1 << 1, // From meshopt_SimplifySparse
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/* Treat error limit and resulting error as absolute instead of relative to mesh extents. */
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SIMPLIFY_ERROR_ABSOLUTE = 1 << 2, // From meshopt_SimplifyErrorAbsolute
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/* Remove disconnected parts of the mesh during simplification incrementally, regardless of the topological restrictions inside components. */
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SIMPLIFY_PRUNE = 1 << 3, // From meshopt_SimplifyPrune
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};
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typedef void (*OptimizeVertexCacheFunc)(unsigned int *destination, const unsigned int *indices, size_t index_count, size_t vertex_count);
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static OptimizeVertexCacheFunc optimize_vertex_cache_func;
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typedef size_t (*OptimizeVertexFetchRemapFunc)(unsigned int *destination, const unsigned int *indices, size_t index_count, size_t vertex_count);
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static OptimizeVertexFetchRemapFunc optimize_vertex_fetch_remap_func;
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typedef size_t (*SimplifyFunc)(unsigned int *destination, const unsigned int *indices, size_t index_count, const float *vertex_positions, size_t vertex_count, size_t vertex_positions_stride, size_t target_index_count, float target_error, unsigned int options, float *r_error);
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static SimplifyFunc simplify_func;
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typedef size_t (*SimplifyWithAttribFunc)(unsigned int *destination, const unsigned int *indices, size_t index_count, const float *vertex_data, size_t vertex_count, size_t vertex_stride, const float *attributes, size_t attribute_stride, const float *attribute_weights, size_t attribute_count, const unsigned char *vertex_lock, size_t target_index_count, float target_error, unsigned int options, float *result_error);
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static SimplifyWithAttribFunc simplify_with_attrib_func;
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typedef float (*SimplifyScaleFunc)(const float *vertex_positions, size_t vertex_count, size_t vertex_positions_stride);
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static SimplifyScaleFunc simplify_scale_func;
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typedef size_t (*GenerateRemapFunc)(unsigned int *destination, const unsigned int *indices, size_t index_count, const void *vertices, size_t vertex_count, size_t vertex_size);
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static GenerateRemapFunc generate_remap_func;
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typedef void (*RemapVertexFunc)(void *destination, const void *vertices, size_t vertex_count, size_t vertex_size, const unsigned int *remap);
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static RemapVertexFunc remap_vertex_func;
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typedef void (*RemapIndexFunc)(unsigned int *destination, const unsigned int *indices, size_t index_count, const unsigned int *remap);
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static RemapIndexFunc remap_index_func;
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static void strip_mesh_arrays(PackedVector3Array &r_vertices, PackedInt32Array &r_indices);
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private:
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struct VertexHasher {
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static _FORCE_INLINE_ uint32_t hash(const Vertex &p_vtx);
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};
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struct SmoothGroupVertex {
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Vector3 vertex;
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uint32_t smooth_group = 0;
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bool operator==(const SmoothGroupVertex &p_vertex) const;
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SmoothGroupVertex(const Vertex &p_vertex) {
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vertex = p_vertex.vertex;
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smooth_group = p_vertex.smooth_group;
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}
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};
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struct SmoothGroupVertexHasher {
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static _FORCE_INLINE_ uint32_t hash(const SmoothGroupVertex &p_vtx);
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};
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struct TriangleHasher {
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static _FORCE_INLINE_ uint32_t hash(const int *p_triangle);
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static _FORCE_INLINE_ bool compare(const int *p_lhs, const int *p_rhs);
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};
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struct WeightSort {
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int index = 0;
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float weight = 0.0;
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bool operator<(const WeightSort &p_right) const {
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return weight < p_right.weight;
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}
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};
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bool begun = false;
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bool first = false;
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Mesh::PrimitiveType primitive = Mesh::PRIMITIVE_LINES;
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uint64_t format = 0;
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Ref<Material> material;
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//arrays
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LocalVector<Vertex> vertex_array;
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LocalVector<int> index_array;
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//memory
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Color last_color;
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Vector3 last_normal;
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Vector2 last_uv;
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Vector2 last_uv2;
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Vector<int> last_bones;
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Vector<float> last_weights;
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Plane last_tangent;
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uint32_t last_smooth_group = 0;
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SkinWeightCount skin_weights = SKIN_4_WEIGHTS;
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Color last_custom[RS::ARRAY_CUSTOM_COUNT];
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CustomFormat last_custom_format[RS::ARRAY_CUSTOM_COUNT];
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void _create_list_from_arrays(Array arr, LocalVector<Vertex> *r_vertex, LocalVector<int> *r_index, uint64_t &lformat);
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void _create_list(const Ref<Mesh> &p_existing, int p_surface, LocalVector<Vertex> *r_vertex, LocalVector<int> *r_index, uint64_t &lformat);
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//mikktspace callbacks
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static int mikktGetNumFaces(const SMikkTSpaceContext *pContext);
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static int mikktGetNumVerticesOfFace(const SMikkTSpaceContext *pContext, const int iFace);
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static void mikktGetPosition(const SMikkTSpaceContext *pContext, float fvPosOut[], const int iFace, const int iVert);
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static void mikktGetNormal(const SMikkTSpaceContext *pContext, float fvNormOut[], const int iFace, const int iVert);
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static void mikktGetTexCoord(const SMikkTSpaceContext *pContext, float fvTexcOut[], const int iFace, const int iVert);
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static void mikktSetTSpaceDefault(const SMikkTSpaceContext *pContext, const float fvTangent[], const float fvBiTangent[], const float fMagS, const float fMagT,
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const tbool bIsOrientationPreserving, const int iFace, const int iVert);
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void _add_triangle_fan(const Vector<Vector3> &p_vertices, const Vector<Vector2> &p_uvs = Vector<Vector2>(), const Vector<Color> &p_colors = Vector<Color>(), const Vector<Vector2> &p_uv2s = Vector<Vector2>(), const Vector<Vector3> &p_normals = Vector<Vector3>(), const TypedArray<Plane> &p_tangents = TypedArray<Plane>());
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protected:
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static void _bind_methods();
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public:
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void set_skin_weight_count(SkinWeightCount p_weights);
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SkinWeightCount get_skin_weight_count() const;
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void set_custom_format(int p_channel_index, CustomFormat p_format);
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CustomFormat get_custom_format(int p_channel_index) const;
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Mesh::PrimitiveType get_primitive_type() const;
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void begin(Mesh::PrimitiveType p_primitive);
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void set_color(Color p_color);
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void set_normal(const Vector3 &p_normal);
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void set_tangent(const Plane &p_tangent);
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void set_uv(const Vector2 &p_uv);
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void set_uv2(const Vector2 &p_uv2);
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void set_custom(int p_channel_index, const Color &p_custom);
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void set_bones(const Vector<int> &p_bones);
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void set_weights(const Vector<float> &p_weights);
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void set_smooth_group(uint32_t p_group);
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void add_vertex(const Vector3 &p_vertex);
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void add_triangle_fan(const Vector<Vector3> &p_vertices, const Vector<Vector2> &p_uvs = Vector<Vector2>(), const Vector<Color> &p_colors = Vector<Color>(), const Vector<Vector2> &p_uv2s = Vector<Vector2>(), const Vector<Vector3> &p_normals = Vector<Vector3>(), const Vector<Plane> &p_tangents = Vector<Plane>());
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void add_index(int p_index);
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void index();
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void deindex();
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void generate_normals(bool p_flip = false);
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void generate_tangents();
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void optimize_indices_for_cache();
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AABB get_aabb() const;
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Vector<int> generate_lod(float p_threshold, int p_target_index_count = 3);
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void set_material(const Ref<Material> &p_material);
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Ref<Material> get_material() const;
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void clear();
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LocalVector<Vertex> &get_vertex_array() {
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return vertex_array;
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}
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void create_from_triangle_arrays(const Array &p_arrays);
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void create_from_arrays(const Array &p_arrays, Mesh::PrimitiveType p_primitive_type = Mesh::PRIMITIVE_TRIANGLES);
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static void create_vertex_array_from_arrays(const Array &p_arrays, LocalVector<Vertex> &ret, uint64_t *r_format = nullptr);
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Array commit_to_arrays();
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void create_from(const Ref<Mesh> &p_existing, int p_surface);
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void create_from_blend_shape(const Ref<Mesh> &p_existing, int p_surface, const String &p_blend_shape_name);
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void append_from(const Ref<Mesh> &p_existing, int p_surface, const Transform3D &p_xform);
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Ref<ArrayMesh> commit(const Ref<ArrayMesh> &p_existing = Ref<ArrayMesh>(), uint64_t p_compress_flags = 0);
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SurfaceTool();
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};
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VARIANT_ENUM_CAST(SurfaceTool::CustomFormat)
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VARIANT_ENUM_CAST(SurfaceTool::SkinWeightCount)
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#endif // SURFACE_TOOL_H
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