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

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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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157
xs/src/slic3r/GUI/3DScene.cpp
View file

@ -1,3 +1,5 @@
#include <GL/glew.h>
#include "3DScene.hpp"
#include "../../libslic3r/libslic3r.h"
@ -21,6 +23,10 @@ namespace Slic3r {
void GLIndexedVertexArray::load_mesh_flat_shading(const TriangleMesh &mesh)
{
assert(triangle_indices.empty() && vertices_and_normals_interleaved_size == 0);
assert(quad_indices.empty() && triangle_indices_size == 0);
assert(vertices_and_normals_interleaved.size() % 6 == 0 && quad_indices_size == vertices_and_normals_interleaved.size());
this->vertices_and_normals_interleaved.reserve(this->vertices_and_normals_interleaved.size() + 3 * 3 * 2 * mesh.facets_count());
for (int i = 0; i < mesh.stl.stats.number_of_facets; ++ i) {
@ -28,6 +34,130 @@ void GLIndexedVertexArray::load_mesh_flat_shading(const TriangleMesh &mesh)
for (int j = 0; j < 3; ++ j)
this->push_geometry(facet.vertex[j].x, facet.vertex[j].y, facet.vertex[j].z, facet.normal.x, facet.normal.y, facet.normal.z);
}
vertices_and_normals_interleaved_size = this->vertices_and_normals_interleaved.size();
}
void GLIndexedVertexArray::finalize_geometry(bool use_VBOs)
{
assert(this->vertices_and_normals_interleaved_VBO_id == 0);
assert(this->triangle_indices_VBO_id == 0);
assert(this->quad_indices_VBO_id == 0);
this->setup_sizes();
if (use_VBOs) {
if (! empty()) {
glGenBuffers(1, &this->vertices_and_normals_interleaved_VBO_id);
glBindBuffer(GL_ARRAY_BUFFER, this->vertices_and_normals_interleaved_VBO_id);
glBufferData(GL_ARRAY_BUFFER, this->vertices_and_normals_interleaved.size() * 4, this->vertices_and_normals_interleaved.data(), GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
this->vertices_and_normals_interleaved.clear();
}
if (! this->triangle_indices.empty()) {
glGenBuffers(1, &this->triangle_indices_VBO_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->triangle_indices_VBO_id);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, this->triangle_indices.size() * 4, this->triangle_indices.data(), GL_STATIC_DRAW);
this->triangle_indices.clear();
}
if (! this->quad_indices.empty()) {
glGenBuffers(1, &this->quad_indices_VBO_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->quad_indices_VBO_id);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, this->quad_indices.size() * 4, this->quad_indices.data(), GL_STATIC_DRAW);
this->quad_indices.clear();
}
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
this->shrink_to_fit();
}
void GLIndexedVertexArray::release_geometry()
{
if (this->vertices_and_normals_interleaved_VBO_id)
glDeleteBuffers(1, &this->vertices_and_normals_interleaved_VBO_id);
if (this->triangle_indices_VBO_id)
glDeleteBuffers(1, &this->triangle_indices_VBO_id);
if (this->quad_indices_VBO_id)
glDeleteBuffers(1, &this->quad_indices_VBO_id);
this->clear();
this->shrink_to_fit();
}
void GLIndexedVertexArray::render() const
{
if (this->indexed()) {
if (this->vertices_and_normals_interleaved_VBO_id) {
// Render using the Vertex Buffer Objects.
glBindBuffer(GL_ARRAY_BUFFER, this->vertices_and_normals_interleaved_VBO_id);
glInterleavedArrays(GL_N3F_V3F, 0, nullptr);
if (this->triangle_indices_size > 0) {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->triangle_indices_VBO_id);
glDrawElements(GL_TRIANGLES, GLsizei(this->triangle_indices_size), GL_UNSIGNED_INT, nullptr);
}
if (this->quad_indices_size > 0) {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->quad_indices_VBO_id);
glDrawElements(GL_QUADS, GLsizei(this->quad_indices_size), GL_UNSIGNED_INT, nullptr);
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
} else {
// Render in an immediate mode.
glInterleavedArrays(GL_N3F_V3F, 0, this->vertices_and_normals_interleaved.data());
// Due to issues with the Intel drivers, rather limit the amount of vertices processed per draw command.
if (! this->triangle_indices.empty())
glDrawElements(GL_TRIANGLES, GLsizei(this->triangle_indices_size), GL_UNSIGNED_INT, this->triangle_indices.data());
if (! this->quad_indices.empty())
glDrawElements(GL_QUADS, GLsizei(this->quad_indices_size), GL_UNSIGNED_INT, this->quad_indices.data());
}
} else {
if (this->vertices_and_normals_interleaved_VBO_id) {
// Render using the Vertex Buffer Objects.
glBindBuffer(GL_ARRAY_BUFFER, this->vertices_and_normals_interleaved_VBO_id);
glInterleavedArrays(GL_N3F_V3F, 0, nullptr);
glDrawArrays(GL_TRIANGLES, 0, GLsizei(this->vertices_and_normals_interleaved_size / 6));
glBindBuffer(GL_ARRAY_BUFFER, 0);
} else {
// Render in an immediate mode.
glInterleavedArrays(GL_N3F_V3F, 0, this->vertices_and_normals_interleaved.data());
glDrawArrays(GL_TRIANGLES, 0, GLsizei(this->vertices_and_normals_interleaved_size / 6));
}
}
glInterleavedArrays(GL_N3F_V3F, 0, nullptr);
}
void GLIndexedVertexArray::render(
const std::pair<size_t, size_t> &tverts_range,
const std::pair<size_t, size_t> &qverts_range) const
{
assert(this->indexed());
if (! this->indexed())
return;
if (this->vertices_and_normals_interleaved_VBO_id) {
// Render using the Vertex Buffer Objects.
glBindBuffer(GL_ARRAY_BUFFER, this->vertices_and_normals_interleaved_VBO_id);
glInterleavedArrays(GL_N3F_V3F, 0, nullptr);
if (this->triangle_indices_size > 0) {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->triangle_indices_VBO_id);
glDrawElements(GL_TRIANGLES, GLsizei(std::min(this->triangle_indices_size, tverts_range.second - tverts_range.first)), GL_UNSIGNED_INT, (const void*)(tverts_range.first * 4));
}
if (this->quad_indices_size > 0) {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->quad_indices_VBO_id);
glDrawElements(GL_QUADS, GLsizei(std::min(this->quad_indices_size, qverts_range.second - qverts_range.first)), GL_UNSIGNED_INT, (const void*)(qverts_range.first * 4));
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
} else {
// Render in an immediate mode.
glInterleavedArrays(GL_N3F_V3F, 0, this->vertices_and_normals_interleaved.data());
if (! this->triangle_indices.empty())
glDrawElements(GL_TRIANGLES, GLsizei(std::min(this->triangle_indices_size, tverts_range.second - tverts_range.first)), GL_UNSIGNED_INT, (const void*)(this->triangle_indices.data() + tverts_range.first));
if (! this->quad_indices.empty())
glDrawElements(GL_QUADS, GLsizei(std::min(this->quad_indices_size, qverts_range.second - qverts_range.first)), GL_UNSIGNED_INT, (const void*)(this->quad_indices.data() + qverts_range.first));
}
glInterleavedArrays(GL_N3F_V3F, 0, nullptr);
}
void GLVolume::set_range(double min_z, double max_z)
@ -65,6 +195,18 @@ void GLVolume::set_range(double min_z, double max_z)
}
}
void GLVolume::render() const
{
glCullFace(GL_BACK);
glPushMatrix();
glTranslated(this->origin.x, this->origin.y, this->origin.z);
if (this->indexed_vertex_array.indexed())
this->indexed_vertex_array.render(this->tverts_range, this->qverts_range);
else
this->indexed_vertex_array.render();
glPopMatrix();
}
void GLVolume::generate_layer_height_texture(PrintObject *print_object, bool force)
{
GLTexture *tex = this->layer_height_texture.get();
@ -235,7 +377,6 @@ static void thick_lines_to_indexed_vertex_array(
idx_a[BOTTOM] = idx_prev[BOTTOM];
}
bool sharp = true;
if (ii == 0) {
// Start of the 1st line segment.
idx_a[LEFT ] = idx_last ++;
@ -490,6 +631,11 @@ static void extrusionentity_to_verts(const ExtrusionEntity *extrusion_entity, fl
}
}
void _3DScene::_glew_init()
{
glewInit();
}
// Create 3D thick extrusion lines for a skirt and brim.
// Adds a new Slic3r::GUI::3DScene::Volume to volumes.
void _3DScene::_load_print_toolpaths(
@ -539,6 +685,7 @@ void _3DScene::_load_print_toolpaths(
auto bb = print->bounding_box();
volume.bounding_box.merge(Pointf3(unscale(bb.min.x), unscale(bb.min.y), 0.f));
volume.bounding_box.merge(Pointf3(unscale(bb.max.x), unscale(bb.max.y), 0.f));
volume.indexed_vertex_array.finalize_geometry(use_VBOs);
}
// Create 3D thick extrusion lines for object forming extrusions.
@ -559,8 +706,10 @@ void _3DScene::_load_print_object_toolpaths(
bool has_infill;
bool has_support;
// static const size_t alloc_size_max () { return 32 * 1048576 / 4; }
static const size_t alloc_size_max () { return 4 * 1048576 / 4; }
// Number of vertices (each vertex is 6x4=24 bytes long)
static const size_t alloc_size_max () { return 131072; } // 3.15MB
// static const size_t alloc_size_max () { return 65536; } // 1.57MB
// static const size_t alloc_size_max () { return 32768; } // 786kB
static const size_t alloc_size_reserve() { return alloc_size_max() * 2; }
static const float* color_perimeters () { static float color[4] = { 1.0f, 1.0f, 0.0f, 1.f }; return color; } // yellow
@ -672,6 +821,8 @@ void _3DScene::_load_print_object_toolpaths(
volume_ptr += v.volumes.size();
v.volumes.clear();
}
for (GLVolume *v : volumes->volumes)
v->indexed_vertex_array.finalize_geometry(use_VBOs);
BOOST_LOG_TRIVIAL(debug) << "Loading print object toolpaths in parallel - end";
}

97
xs/src/slic3r/GUI/3DScene.hpp
View file

@ -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,