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Use Vertex Buffer Objects for rendering of 3D volumes if possible.

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This commit is contained in:
bubnikv 2017-03-16 14:02:28 +01:00
parent c32c7fa1dc
commit 7f7d2da5fe
8 changed files with 257 additions and 103 deletions
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97
xs/src/slic3r/GUI/3DScene.hpp
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@ -17,31 +17,49 @@ class ModelObject;
// possibly indexed by triangles and / or quads.
class GLIndexedVertexArray {
public:
GLIndexedVertexArray() {}
GLIndexedVertexArray() :
vertices_and_normals_interleaved_VBO_id(0),
triangle_indices_VBO_id(0),
quad_indices_VBO_id(0)
{ this->setup_sizes(); }
GLIndexedVertexArray(const GLIndexedVertexArray &rhs) :
vertices_and_normals_interleaved(rhs.vertices_and_normals_interleaved),
triangle_indices(rhs.triangle_indices),
quad_indices(rhs.quad_indices)
{}
quad_indices(rhs.quad_indices),
vertices_and_normals_interleaved_VBO_id(0),
triangle_indices_VBO_id(0),
quad_indices_VBO_id(0)
{ this->setup_sizes(); }
GLIndexedVertexArray(GLIndexedVertexArray &&rhs) :
vertices_and_normals_interleaved(std::move(rhs.vertices_and_normals_interleaved)),
triangle_indices(std::move(rhs.triangle_indices)),
quad_indices(std::move(rhs.quad_indices))
{}
quad_indices(std::move(rhs.quad_indices)),
vertices_and_normals_interleaved_VBO_id(0),
triangle_indices_VBO_id(0),
quad_indices_VBO_id(0)
{ this->setup_sizes(); }
GLIndexedVertexArray& operator=(const GLIndexedVertexArray &rhs)
{
assert(vertices_and_normals_interleaved_VBO_id == 0);
assert(triangle_indices_VBO_id == 0);
assert(triangle_indices_VBO_id == 0);
this->vertices_and_normals_interleaved = rhs.vertices_and_normals_interleaved;
this->triangle_indices = rhs.triangle_indices;
this->quad_indices = rhs.quad_indices;
this->setup_sizes();
return *this;
}
GLIndexedVertexArray& operator=(GLIndexedVertexArray &&rhs)
{
assert(vertices_and_normals_interleaved_VBO_id == 0);
assert(triangle_indices_VBO_id == 0);
assert(triangle_indices_VBO_id == 0);
this->vertices_and_normals_interleaved = std::move(rhs.vertices_and_normals_interleaved);
this->triangle_indices = std::move(rhs.triangle_indices);
this->quad_indices = std::move(rhs.quad_indices);
this->setup_sizes();
return *this;
}
@ -50,8 +68,22 @@ public:
std::vector<int> triangle_indices;
std::vector<int> quad_indices;
// When the geometry data is loaded into the graphics card as Vertex Buffer Objects,
// the above mentioned std::vectors are cleared and the following variables keep their original length.
size_t vertices_and_normals_interleaved_size;
size_t triangle_indices_size;
size_t quad_indices_size;
// IDs of the Vertex Array Objects, into which the geometry has been loaded.
// Zero if the VBOs are not used.
unsigned int vertices_and_normals_interleaved_VBO_id;
unsigned int triangle_indices_VBO_id;
unsigned int quad_indices_VBO_id;
void load_mesh_flat_shading(const TriangleMesh &mesh);
inline bool has_VBOs() const { return vertices_and_normals_interleaved_VBO_id != 0; }
inline void reserve(size_t sz) {
this->vertices_and_normals_interleaved.reserve(sz * 6);
this->triangle_indices.reserve(sz * 3);
@ -72,23 +104,36 @@ public:
push_geometry(float(x), float(y), float(z), float(nx), float(ny), float(nz));
}
// Finalize the initialization of the geometry & indices,
// upload the geometry and indices to OpenGL VBO objects
// and shrink the allocated data, possibly relasing it if it has been loaded into the VBOs.
void finalize_geometry(bool use_VBOs);
// Release the geometry data, release OpenGL VBOs.
void release_geometry();
// Render either using an immediate mode, or the VBOs.
void render() const;
void render(const std::pair<size_t, size_t> &tverts_range, const std::pair<size_t, size_t> &qverts_range) const;
// Is there any geometry data stored?
bool empty() const { return vertices_and_normals_interleaved.empty(); }
bool empty() const { return vertices_and_normals_interleaved_size == 0; }
// Is this object indexed, or is it just a set of triangles?
bool indexed() const { return ! this->empty() && (! this->triangle_indices.empty() || ! this->quad_indices.empty()); }
bool indexed() const { return ! this->empty() && this->triangle_indices_size + this->quad_indices_size > 0; }
void clear() {
this->vertices_and_normals_interleaved.clear();
this->triangle_indices.clear();
this->quad_indices.clear();
this->quad_indices.clear();
this->setup_sizes();
}
// Shrink the internal storage to tighly fit the data stored.
void shrink_to_fit() {
if (! this->has_VBOs())
this->setup_sizes();
this->vertices_and_normals_interleaved.shrink_to_fit();
this->triangle_indices.shrink_to_fit();
this->quad_indices.shrink_to_fit();
this->quad_indices.shrink_to_fit();
}
BoundingBoxf3 bounding_box() const {
@ -109,6 +154,13 @@ public:
}
return bbox;
}
private:
inline void setup_sizes() {
vertices_and_normals_interleaved_size = this->vertices_and_normals_interleaved.size();
triangle_indices_size = this->triangle_indices.size();
quad_indices_size = this->quad_indices.size();
}
};
class GLTexture
@ -201,23 +253,8 @@ public:
bool indexed() const { return this->indexed_vertex_array.indexed(); }
void set_range(coordf_t low, coordf_t high);
// Non-indexed interleaved vertices & normals, likely forming triangles.
void* triangles_to_render_ptr() { return indexed_vertex_array.vertices_and_normals_interleaved.data(); }
size_t triangles_to_render_cnt() { return indexed_vertex_array.vertices_and_normals_interleaved.size() / (3 * 2); }
// Indexed triangles & quads, complete set for storing into a vertex buffer.
size_t geometry_size() const { return indexed_vertex_array.vertices_and_normals_interleaved.size() * 4; }
void* triangle_indices_ptr() { return indexed_vertex_array.triangle_indices.data(); }
void* quad_indices_ptr() { return indexed_vertex_array.quad_indices.data(); }
size_t indexed_triangles_cnt() { return indexed_vertex_array.triangle_indices.size(); }
size_t indexed_quads_cnt() { return indexed_vertex_array.quad_indices.size(); }
// Indexed triangles & quads, to be painted in an immediate mode.
size_t triangle_indices_to_render_offset() const { return tverts_range.first; }
size_t quad_indices_to_render_offset() const { return qverts_range.first; }
size_t indexed_triangles_to_render_cnt() const { return std::min(indexed_vertex_array.triangle_indices.size(), tverts_range.second - tverts_range.first); }
size_t indexed_quads_to_render_cnt() const { return std::min(indexed_vertex_array.quad_indices.size(), qverts_range.second - qverts_range.first); }
void render_VBOs() const;
void render() const;
void release_geometry() { this->indexed_vertex_array.release_geometry(); }
/************************************************ Layer height texture ****************************************************/
std::shared_ptr<GLTexture> layer_height_texture;
@ -261,10 +298,14 @@ public:
const std::string &select_by,
const std::string &drag_by);
// Release the geometry data assigned to the volumes.
// If OpenGL VBOs were allocated, an OpenGL context has to be active to release them.
void release_geometry() { for (auto *v : volumes) v->release_geometry(); }
// Clear the geometry
void clear() { for (auto *v : volumes) delete v; volumes.clear(); }
bool empty() const { return volumes.empty(); }
void set_range(double low, double high) { for (GLVolume *vol : this->volumes) vol->set_range(low, high); }
void render_VBOs() const { for (GLVolume *vol : this->volumes) vol->render_VBOs(); }
private:
GLVolumeCollection(const GLVolumeCollection &other);
@ -274,6 +315,8 @@ private:
class _3DScene
{
public:
static void _glew_init();
static void _load_print_toolpaths(
const Print *print,
GLVolumeCollection *volumes,