From 8d43a854c60f9d186ce304e6d7f335deca3bf2ab Mon Sep 17 00:00:00 2001
From: enricoturri1966 <enricoturri@seznam.cz>
Date: Thu, 3 Mar 2022 09:46:04 +0100
Subject: [PATCH] Tech ENABLE_GLBEGIN_GLEND_SHADERS_ATTRIBUTES - Use vertex
 attributes and matrices in shaders.

Shader: gouraud_light - Sequential view marker
---
 src/slic3r/GUI/GCodeViewer.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/slic3r/GUI/GCodeViewer.cpp b/src/slic3r/GUI/GCodeViewer.cpp
index cfe6fe418a..022283c387 100644
--- a/src/slic3r/GUI/GCodeViewer.cpp
+++ b/src/slic3r/GUI/GCodeViewer.cpp
@@ -315,7 +315,11 @@ void GCodeViewer::SequentialView::Marker::render()
     if (!m_visible)
         return;
 
+#if ENABLE_GLBEGIN_GLEND_SHADERS_ATTRIBUTES
+    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
+#else
     GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
+#endif // ENABLE_GLBEGIN_GLEND_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 
@@ -325,12 +329,22 @@ void GCodeViewer::SequentialView::Marker::render()
     shader->start_using();
     shader->set_uniform("emission_factor", 0.0f);
 
+#if ENABLE_GLBEGIN_GLEND_SHADERS_ATTRIBUTES
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d matrix = camera.get_view_matrix() * m_world_transform.cast<double>();
+    shader->set_uniform("view_model_matrix", matrix);
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+    shader->set_uniform("normal_matrix", (Matrix3d)matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
+#else
     glsafe(::glPushMatrix());
     glsafe(::glMultMatrixf(m_world_transform.data()));
+#endif // ENABLE_GLBEGIN_GLEND_SHADERS_ATTRIBUTES
 
     m_model.render();
 
+#if !ENABLE_GLBEGIN_GLEND_SHADERS_ATTRIBUTES
     glsafe(::glPopMatrix());
+#endif // !ENABLE_GLBEGIN_GLEND_SHADERS_ATTRIBUTES
 
     shader->stop_using();