| /* |
| * Copyright 2017 Google Inc. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "platform_tools/android/apps/arcore/src/main/cpp/point_cloud_renderer.h" |
| #include "platform_tools/android/apps/arcore/src/main/cpp/util.h" |
| |
| namespace hello_ar { |
| namespace { |
| constexpr char kVertexShader[] = R"( |
| attribute vec4 vertex; |
| uniform mat4 mvp; |
| void main() { |
| gl_PointSize = 5.0; |
| // Pointcloud vertex's w component is confidence value. |
| // Not used in renderer. |
| gl_Position = mvp * vec4(vertex.xyz, 1.0); |
| })"; |
| |
| constexpr char kFragmentShader[] = R"( |
| precision lowp float; |
| void main() { |
| gl_FragColor = vec4(0.1215, 0.7372, 0.8235, 1.0); |
| })"; |
| } // namespace |
| |
| void PointCloudRenderer::InitializeGlContent() { |
| shader_program_ = util::CreateProgram(kVertexShader, kFragmentShader); |
| |
| CHECK(shader_program_); |
| |
| attribute_vertices_ = glGetAttribLocation(shader_program_, "vertex"); |
| uniform_mvp_mat_ = glGetUniformLocation(shader_program_, "mvp"); |
| |
| util::CheckGlError("point_cloud_renderer::InitializeGlContent()"); |
| } |
| |
| void PointCloudRenderer::Draw(glm::mat4 mvp_matrix, ArSession *ar_session, |
| ArPointCloud *ar_point_cloud) const { |
| CHECK(shader_program_); |
| |
| glUseProgram(shader_program_); |
| |
| int32_t number_of_points = 0; |
| ArPointCloud_getNumberOfPoints(ar_session, ar_point_cloud, &number_of_points); |
| if (number_of_points <= 0) { |
| return; |
| } |
| |
| const float *point_cloud_data; |
| ArPointCloud_getData(ar_session, ar_point_cloud, &point_cloud_data); |
| |
| glUniformMatrix4fv(uniform_mvp_mat_, 1, GL_FALSE, glm::value_ptr(mvp_matrix)); |
| |
| glEnableVertexAttribArray(attribute_vertices_); |
| glVertexAttribPointer(attribute_vertices_, 4, GL_FLOAT, GL_FALSE, 0, |
| point_cloud_data); |
| |
| glDrawArrays(GL_POINTS, 0, number_of_points); |
| |
| glUseProgram(0); |
| util::CheckGlError("PointCloudRenderer::Draw"); |
| } |
| |
| } // namespace hello_ar |