cpu_generated_lines.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
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 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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 * Mozilla Public License Version 2.0                                        *
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#ifndef VCL_BGFX_PRIMITIVES_LINES_CPU_GENERATED_LINES_H
#define VCL_BGFX_PRIMITIVES_LINES_CPU_GENERATED_LINES_H
 
#include <vclib/bgfx/buffers.h>
#include <vclib/bgfx/context.h>
 
namespace vcl::detail {
 
// Note: copy constructor and assignment are not allowed (because of bgfx
// handles). Move constructor and assignment are allowed.
class CPUGeneratedLines
{
    bgfx::ProgramHandle mLinesPH =
        Context::instance()
            .programManager()
            .getProgram<VertFragProgram::CUSTOM_CPU_LINES>();
 
    VertexBuffer mVertexCoords;
    VertexBuffer mVertexNormals;
    VertexBuffer mVertexColors;
    IndexBuffer  mLineColors;
 
    IndexBuffer mIndices;
 
public:
    CPUGeneratedLines() = default;
 
    CPUGeneratedLines(
        const std::vector<float>& vertCoords,
        const std::vector<float>& vertNormals = std::vector<float>(),
        const std::vector<uint>&  vertColors  = std::vector<uint>(),
        const std::vector<uint>&  lineColors  = std::vector<uint>());
 
    CPUGeneratedLines(
        const std::vector<float>& vertCoords,
        const std::vector<uint>&  lineIndices,
        const std::vector<float>& vertNormals = std::vector<float>(),
        const std::vector<uint>&  vertColors  = std::vector<uint>(),
        const std::vector<uint>&  lineColors  = std::vector<uint>());
 
    void swap(CPUGeneratedLines& other);
 
    friend void swap(CPUGeneratedLines& a, CPUGeneratedLines& b) { a.swap(b); }
 
    void setPoints(
        const std::vector<float>& vertCoords,
        const std::vector<float>& vertNormals = std::vector<float>(),
        const std::vector<uint>&  vertColors  = std::vector<uint>(),
        const std::vector<uint>&  lineColors  = std::vector<uint>());
 
    void setPoints(
        const std::vector<float>& vertCoords,
        const std::vector<uint>&  lineIndices,
        const std::vector<float>& vertNormals = std::vector<float>(),
        const std::vector<uint>&  vertColors  = std::vector<uint>(),
        const std::vector<uint>&  lineColors  = std::vector<uint>());
 
    void draw(uint viewId) const;
 
private:
    void setPoints(
        bool                      setLineIndices,
        const std::vector<float>& vertCoords,
        const std::vector<uint>&  lineIndices,
        const std::vector<float>& vertNormals,
        const std::vector<uint>&  vertColors,
        const std::vector<uint>&  lineColors);
};
 
} // namespace vcl::detail
 
#endif // VCL_BGFX_PRIMITIVES_LINES_CPU_GENERATED_LINES_H