Tech ENABLE_GLINDEXEDVERTEXARRAY_REMOVAL - Replace GLIndexedVertexArray with GLModel: MeshClipper::m_vertex_array

(cherry picked from commit prusa3d/PrusaSlicer@be6922795d)

src/slic3r/GUI/Gizmos/GLGizmosCommon.cpp

@@ -218,15 +218,9 @@ void InstancesHider::render_cut() const
             clipper->set_limiting_plane(ClippingPlane::ClipsNothing());
 
         glsafe(::glPushMatrix());
-        if (mv->is_model_part())
-            glsafe(::glColor3f(0.8f, 0.3f, 0.0f));
-        else {
-            const ColorRGBA color = color_from_model_volume(*mv);
-            glsafe(::glColor4fv(color.data()));
-        }
         glsafe(::glPushAttrib(GL_DEPTH_TEST));
         glsafe(::glDisable(GL_DEPTH_TEST));
-        clipper->render_cut();
+        clipper->render_cut(mv->is_model_part() ? ColorRGBA(0.8f, 0.3f, 0.0f, 1.0f) : color_from_model_volume(*mv));
         glsafe(::glPopAttrib());
         glsafe(::glPopMatrix());
 
@@ -435,8 +429,7 @@ void ObjectClipper::render_cut() const
             clipper->set_limiting_plane(ClippingPlane(Vec3d::UnitZ(), -SINKING_Z_THRESHOLD));
         glsafe(::glPushMatrix());
         // BBS
-        glsafe(::glColor3f(0.25f, 0.25f, 0.25f));
-        clipper->render_cut();
+        clipper->render_cut({ 0.25f, 0.25f, 0.25f, 1.0f });
         glsafe(::glPopMatrix());
 
         ++clipper_id;
@@ -584,8 +577,7 @@ void SupportsClipper::render_cut() const
     m_clipper->set_transformation(supports_trafo);
 
     glsafe(::glPushMatrix());
-    glsafe(::glColor3f(1.0f, 0.f, 0.37f));
-    m_clipper->render_cut();
+    m_clipper->render_cut({ 1.0f, 0.f, 0.37f, 1.0f });
     glsafe(::glPopMatrix());
 }
 
@@ -734,8 +726,7 @@ void ModelObjectsClipper::render_cut() const
             clipper->set_transformation(trafo);
             glsafe(::glPushMatrix());
             // BBS
-            glsafe(::glColor3f(0.25f, 0.25f, 0.25f));
-            clipper->render_cut();
+            clipper->render_cut({0.25f, 0.25f, 0.25f, 1.0f});
             glsafe(::glPopMatrix());
 
             ++clipper_id;

src/slic3r/GUI/Gizmos/GLGizmosCommon.hpp

@@ -4,6 +4,7 @@
 #include <memory>
 #include <map>
 
+#include "slic3r/GUI/3DScene.hpp"
 #include "slic3r/GUI/MeshUtils.hpp"
 #include "libslic3r/SLA/Hollowing.hpp"
 

src/slic3r/GUI/MeshUtils.cpp

@@ -6,6 +6,7 @@
 #include "libslic3r/ClipperUtils.hpp"
 #include "libslic3r/Model.hpp"
 
+#include "slic3r/GUI/GUI_App.hpp"
 #include "slic3r/GUI/Camera.hpp"
 
 #include <GL/glew.h>
@@ -67,13 +68,25 @@ void MeshClipper::set_transformation(const Geometry::Transformation& trafo)
 
 
 
-void MeshClipper::render_cut()
+void MeshClipper::render_cut(const ColorRGBA& color)
 {
     if (! m_triangles_valid)
         recalculate_triangles();
 
-    if (m_vertex_array.has_VBOs())
-        m_vertex_array.render();
+    GLShaderProgram* curr_shader = wxGetApp().get_current_shader();
+    if (curr_shader != nullptr)
+        curr_shader->stop_using();
+
+    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    if (shader != nullptr) {
+        shader->start_using();
+        m_model.set_color(color);
+        m_model.render();
+        shader->stop_using();
+    }
+
+    if (curr_shader != nullptr)
+        curr_shader->start_using();
 }
 
 bool MeshClipper::is_projection_inside_cut(const Vec3d &point_in) const
@@ -189,15 +202,28 @@ void MeshClipper::recalculate_triangles()
 
     tr.pretranslate(0.001 * m_plane.get_normal().normalized()); // to avoid z-fighting
 
-    m_vertex_array.release_geometry();
-    for (auto it=m_triangles2d.cbegin(); it != m_triangles2d.cend(); it=it+3) {
-        m_vertex_array.push_geometry(tr * Vec3d((*(it+0))(0), (*(it+0))(1), height_mesh), up);
-        m_vertex_array.push_geometry(tr * Vec3d((*(it+1))(0), (*(it+1))(1), height_mesh), up);
-        m_vertex_array.push_geometry(tr * Vec3d((*(it+2))(0), (*(it+2))(1), height_mesh), up);
+    m_model.reset();
+
+    GLModel::Geometry init_data;
+    const GLModel::Geometry::EIndexType index_type = (m_triangles2d.size() < 65536) ? GLModel::Geometry::EIndexType::USHORT : GLModel::Geometry::EIndexType::UINT;
+    init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, index_type };
+    init_data.reserve_vertices(m_triangles2d.size());
+    init_data.reserve_indices(m_triangles2d.size());
+
+    // vertices + indices
+    for (auto it = m_triangles2d.cbegin(); it != m_triangles2d.cend(); it = it + 3) {
+        init_data.add_vertex((Vec3f)(tr * Vec3d((*(it + 0)).x(), (*(it + 0)).y(), height_mesh)).cast<float>(), (Vec3f)up.cast<float>());
+        init_data.add_vertex((Vec3f)(tr * Vec3d((*(it + 1)).x(), (*(it + 1)).y(), height_mesh)).cast<float>(), (Vec3f)up.cast<float>());
+        init_data.add_vertex((Vec3f)(tr * Vec3d((*(it + 2)).x(), (*(it + 2)).y(), height_mesh)).cast<float>(), (Vec3f)up.cast<float>());
         const size_t idx = it - m_triangles2d.cbegin();
-        m_vertex_array.push_triangle(idx, idx+1, idx+2);
+        if (index_type == GLModel::Geometry::EIndexType::USHORT)
+            init_data.add_ushort_triangle((unsigned short)idx, (unsigned short)idx + 1, (unsigned short)idx + 2);
+        else
+            init_data.add_uint_triangle((unsigned int)idx, (unsigned int)idx + 1, (unsigned int)idx + 2);
     }
-    m_vertex_array.finalize_geometry(true);
+
+    if (!init_data.is_empty())
+        m_model.init_from(std::move(init_data));
 
     m_triangles_valid = true;
 }

src/slic3r/GUI/MeshUtils.hpp

@@ -6,7 +6,7 @@
 #include "libslic3r/SLA/IndexedMesh.hpp"
 #include "admesh/stl.h"
 
-#include "slic3r/GUI/3DScene.hpp"
+#include "slic3r/GUI/GLModel.hpp"
 
 #include <cfloat>
 
@@ -69,7 +69,8 @@ public:
 
 
 // MeshClipper class cuts a mesh and is able to return a triangulated cut.
-class MeshClipper {
+class MeshClipper
+{
 public:
     // Inform MeshClipper about which plane we want to use to cut the mesh
     // This is supposed to be in world coordinates.
@@ -92,7 +93,7 @@ public:
 
     // Render the triangulated cut. Transformation matrices should
     // be set in world coords.
-    void render_cut();
+    void render_cut(const ColorRGBA& color);
 
     bool is_projection_inside_cut(const Vec3d &point) const;
     bool has_valid_contour() const;
@@ -106,7 +107,7 @@ private:
     ClippingPlane m_plane;
     ClippingPlane m_limiting_plane = ClippingPlane::ClipsNothing();
     std::vector<Vec2f> m_triangles2d;
-    GLIndexedVertexArray m_vertex_array;
+    GLModel m_model;
     bool m_triangles_valid = false;
 
     struct CutIsland

src/slic3r/Utils/UndoRedo.cpp

@@ -21,6 +21,7 @@
 #include <libslic3r/ObjectID.hpp>
 #include <libslic3r/Utils.hpp>
 
+#include "slic3r/GUI/3DScene.hpp"
 #include <boost/foreach.hpp>
 
 #ifndef NDEBUG