ENABLE_SEAMS_USING_INSTANCED_MODELS -> WIP: Render models using glDrawElementsInstanced
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34da899c66
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2980418706
8 changed files with 229 additions and 31 deletions
src/slic3r/GUI
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@ -207,6 +207,85 @@ void GLModel::render() const
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}
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}
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#if ENABLE_SEAMS_USING_INSTANCED_MODELS
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void GLModel::render_instanced(unsigned int instances_vbo, unsigned int instances_count) const
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{
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if (instances_vbo == 0)
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return;
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GLShaderProgram* shader = wxGetApp().get_current_shader();
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assert(shader == nullptr || boost::algorithm::iends_with(shader->get_name(), "_instanced"));
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// vertex attributes
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GLint position_id = (shader != nullptr) ? shader->get_attrib_location("v_position") : -1;
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GLint normal_id = (shader != nullptr) ? shader->get_attrib_location("v_normal") : -1;
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assert(position_id != -1 && normal_id != -1);
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// instance attributes
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GLint offset_id = (shader != nullptr) ? shader->get_attrib_location("i_offset") : -1;
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GLint scales_id = (shader != nullptr) ? shader->get_attrib_location("i_scales") : -1;
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assert(offset_id != -1 && scales_id != -1);
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glsafe(::glBindBuffer(GL_ARRAY_BUFFER, instances_vbo));
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if (offset_id != -1) {
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glsafe(::glVertexAttribPointer(offset_id, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (GLvoid*)0));
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glsafe(::glEnableVertexAttribArray(offset_id));
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glsafe(::glVertexAttribDivisor(offset_id, 1));
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}
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if (scales_id != -1) {
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glsafe(::glVertexAttribPointer(scales_id, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (GLvoid*)(3 * sizeof(float))));
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glsafe(::glEnableVertexAttribArray(scales_id));
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glsafe(::glVertexAttribDivisor(scales_id, 1));
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}
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for (const RenderData& data : m_render_data) {
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if (data.vbo_id == 0 || data.ibo_id == 0)
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continue;
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GLenum mode;
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switch (data.type)
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{
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default:
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case PrimitiveType::Triangles: { mode = GL_TRIANGLES; break; }
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case PrimitiveType::Lines: { mode = GL_LINES; break; }
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case PrimitiveType::LineStrip: { mode = GL_LINE_STRIP; break; }
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case PrimitiveType::LineLoop: { mode = GL_LINE_LOOP; break; }
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}
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if (shader != nullptr)
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shader->set_uniform("uniform_color", data.color);
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else
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glsafe(::glColor4fv(data.color.data()));
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glsafe(::glBindBuffer(GL_ARRAY_BUFFER, data.vbo_id));
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if (position_id != -1) {
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glsafe(::glVertexAttribPointer(position_id, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (GLvoid*)0));
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glsafe(::glEnableVertexAttribArray(position_id));
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}
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if (normal_id != -1) {
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glsafe(::glVertexAttribPointer(normal_id, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (GLvoid*)(3 * sizeof(float))));
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glsafe(::glEnableVertexAttribArray(normal_id));
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}
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glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, data.ibo_id));
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glsafe(::glDrawElementsInstanced(mode, static_cast<GLsizei>(data.indices_count), GL_UNSIGNED_INT, (const void*)0, instances_count));
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glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
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if (normal_id != -1)
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glsafe(::glDisableVertexAttribArray(normal_id));
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if (position_id != -1)
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glsafe(::glDisableVertexAttribArray(position_id));
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}
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if (scales_id != -1)
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glsafe(::glDisableVertexAttribArray(scales_id));
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if (offset_id != -1)
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glsafe(::glDisableVertexAttribArray(offset_id));
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glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
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}
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#endif // ENABLE_SEAMS_USING_INSTANCED_MODELS
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void GLModel::send_to_gpu(RenderData& data, const std::vector<float>& vertices, const std::vector<unsigned int>& indices)
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{
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assert(data.vbo_id == 0);
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