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IO: C++ STL exporter #114862

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Aras Pranckevicius merged 19 commits from aras_p/blender:io-cpp-stl-exporter into main 2023-11-19 16:41:30 +01:00
Conversation 3 Commits 19 Files Changed 10 +16 -5
1 changed files with 16 additions and 5 deletions
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21
source/blender/io/stl/exporter/stl_export_binary_writer.hh
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@ -11,12 +11,23 @@
#include <cstdio>
#include <stdexcept>
#include "BLI_assert.h"
#include "BLI_utility_mixins.hh"
#include "stl_export_writer.hh"
namespace blender::io::stl {
#pragma pack(push, 1)
struct STLBinaryTriangle {
float normal[3]{};
float vertices[3][3]{};
uint16_t attribute_byte_count{};
};
#pragma pack(pop)
BLI_STATIC_ASSERT_ALIGN(STLBinaryTriangle,
sizeof(float[3]) + sizeof(float[3][3]) + sizeof(uint16_t));
class BinaryFileWriter : public FileWriter, NonCopyable {
private:
FILE *file_ = nullptr;
@ -45,12 +56,12 @@ BinaryFileWriter::BinaryFileWriter(const char *filepath)
void BinaryFileWriter::write_triangle(const Triangle *t)
{
bool success = (fwrite(t->normal, sizeof(float[3]), 1, file_) == 1);
success = success && (fwrite(t->vertices, sizeof(float[3][3]), 1, file_) == 1);
STLBinaryTriangle packed_triangle{};
memcpy(packed_triangle.normal, t->normal, sizeof(float[3]));
memcpy(packed_triangle.vertices, t->vertices, sizeof(float[3][3]));
packed_triangle.attribute_byte_count = 0;
uint16_t attribute_byte_count = 0;
success = success && (fwrite(&attribute_byte_count, sizeof(uint16_t), 1, file_) == 1);
if (success) {
if (fwrite(&packed_triangle, sizeof(STLBinaryTriangle), 1, file_) == 1) {
tris_num_++;
}
}