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https://github.com/allemangD/toddcox-visualize.git
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Serializable mesh with nlohmann_json
Displays a cube generated by meshlib.hpp (serialtest)
This commit is contained in:
David Allemang
256
src/main.cpp
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256
src/main.cpp
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#include <glad/glad.h>
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#include <GLFW/glfw3.h>
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#include <imgui.h>
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#include <backends/imgui_impl_glfw.h>
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#include <backends/imgui_impl_opengl3.h>
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#include <iostream>
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#include <fstream>
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#include "gldebug.hpp"
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#include "meshlib.hpp"
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#include "meshlib_json.hpp"
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struct State {
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float bg[4] = {0.45f, 0.55f, 0.60f, 1.00f};
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float fg[4] = {0.19f, 0.86f, 0.33f, 1.00f};
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};
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void show_overlay(State &state) {
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static std::string gl_vendor = (const char *) glGetString(GL_VENDOR);
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static std::string gl_renderer = (const char *) glGetString(GL_RENDERER);
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static std::string gl_version = (const char *) glGetString(GL_VERSION);
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static std::string glsl_version = (const char *) glGetString(GL_SHADING_LANGUAGE_VERSION);
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ImGuiWindowFlags window_flags =
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ImGuiWindowFlags_AlwaysAutoResize |
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ImGuiWindowFlags_NoSavedSettings |
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ImGuiWindowFlags_NoFocusOnAppearing |
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ImGuiWindowFlags_NoNav |
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ImGuiWindowFlags_NoBringToFrontOnFocus |
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ImGuiWindowFlags_NoMove;
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ImGuiStyle &style = ImGui::GetStyle();
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const auto PAD = style.DisplaySafeAreaPadding;
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auto window_pos = PAD;
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ImGui::SetNextWindowPos(window_pos, ImGuiCond_Always);
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ImGui::SetNextWindowBgAlpha(0.35f * style.Alpha);
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ImGui::SetNextWindowCollapsed(true, ImGuiCond_Appearing);
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ImGui::Begin("Graphics Information", nullptr, window_flags);
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ImGui::Text("GL Vendor | %s", gl_vendor.c_str());
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ImGui::Text("GL Renderer | %s", gl_renderer.c_str());
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ImGui::Text("GL Version | %s", gl_version.c_str());
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ImGui::Text("GLSL Version | %s", glsl_version.c_str());
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auto v2 = ImGui::GetWindowSize();
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window_pos.y += v2.y + PAD.y;
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ImGui::End();
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ImGui::SetNextWindowPos(window_pos, ImGuiCond_Always);
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ImGui::SetNextWindowBgAlpha(0.35f * style.Alpha);
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ImGui::Begin("Controls", nullptr, window_flags);
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ImGuiIO &io = ImGui::GetIO();
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ImGui::Text("FPS | %.2f", io.Framerate);
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ImGui::Separator();
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ImGui::ColorEdit3("Background", state.bg, ImGuiColorEditFlags_Float);
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ImGui::ColorEdit3("Foreground", state.fg, ImGuiColorEditFlags_Float);
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ImGui::End();
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}
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void set_style() {
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ImGui::StyleColorsDark();
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ImGuiStyle &style = ImGui::GetStyle();
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style.WindowRounding = 4;
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style.FrameRounding = 2;
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style.DisplaySafeAreaPadding.x = 10;
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style.DisplaySafeAreaPadding.y = 10;
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}
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int run(GLFWwindow *window, ImGuiContext *context) {
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State state;
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auto mesh = ml::CubeMesh(0.5f);
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// auto mesh = ml::read("circle.pak");
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auto dynamic = (ml::DynamicMesh) mesh;
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GLuint vao;
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glCreateVertexArrays(1, &vao);
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GLuint vbo;
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glCreateBuffers(1, &vbo);
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constexpr size_t point_scalar_size = sizeof(ml::DynamicMesh::PointsType::Scalar);
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constexpr size_t cell_scalar_size = sizeof(ml::DynamicMesh::CellsType::Scalar);
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glNamedBufferData(
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vbo,
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(GLsizeiptr) (point_scalar_size * dynamic.points().size()),
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dynamic.points().data(),
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GL_STATIC_DRAW
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);
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glEnableVertexArrayAttrib(vao, 0);
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glVertexArrayVertexBuffer(vao, 0,
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vbo, 0,
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(GLsizeiptr) (point_scalar_size * dynamic.points().rows())
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);
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glVertexArrayAttribFormat(vao, 0, 3, GL_FLOAT, GL_FALSE, 0);
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GLuint ibo;
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glCreateBuffers(1, &ibo);
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glGetError();
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glNamedBufferData(
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ibo,
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(GLsizeiptr) (cell_scalar_size * dynamic.cells().size()),
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dynamic.cells().data(),
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GL_STATIC_DRAW
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);
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glVertexArrayElementBuffer(vao, ibo);
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const char *vs_src = "#version 440\n"
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"layout(location=1) uniform float time;"
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"layout(location=2) uniform mat4 proj;"
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"layout(location=0) in vec3 pos;"
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"void main() {"
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" float c2 = cos(time * 0.2);"
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" float s2 = sin(time * 0.2);"
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" float c3 = cos(time * 0.3);"
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" float s3 = sin(time * 0.3);"
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" mat4 r1 = mat4("
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" c2, -s2, 0.0, 0.0,"
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" s2, c2, 0.0, 0.0,"
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" 0.0, 0.0, 1.0, 0.0,"
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" 0.0, 0.0, 0.0, 1.0"
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" );"
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" mat4 r2 = mat4("
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" c3, 0.0, -s3, 0.0,"
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" 0.0, 1.0, 0.0, 0.0,"
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" s3, 0.0, c3, 0.0,"
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" 0.0, 0.0, 0.0, 1.0"
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");"
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" gl_Position = proj * r2 * r1 * vec4(pos, 1.0);"
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"}";
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GLuint vs = glCreateShader(GL_VERTEX_SHADER);
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glShaderSource(vs, 1, &vs_src, nullptr);
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glCompileShader(vs);
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const char *fs_src = "#version 440\n"
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"layout(location=0) uniform vec4 ucol;"
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"layout(location=0) out vec4 col;"
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"void main() {"
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" float d = 1.0 - gl_FragCoord.z;"
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" d = (d - 0.5) / 0.7 + 0.5;"
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" col = ucol;"
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" col.xyz *= d;"
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"}";
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GLuint fs = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(fs, 1, &fs_src, nullptr);
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glCompileShader(fs);
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GLuint pgm = glCreateProgram();
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glAttachShader(pgm, vs);
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glAttachShader(pgm, fs);
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glLinkProgram(pgm);
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glEnable(GL_DEPTH_TEST);
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Eigen::Projective3f proj;
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while (!glfwWindowShouldClose(window)) {
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glfwPollEvents();
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ImGui_ImplOpenGL3_NewFrame();
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ImGui_ImplGlfw_NewFrame();
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ImGui::NewFrame();
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show_overlay(state);
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ImGui::Render();
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int display_w, display_h;
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glfwGetFramebufferSize(window, &display_w, &display_h);
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glViewport(0, 0, display_w, display_h);
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glClearColor(state.bg[0], state.bg[1], state.bg[2], state.bg[3]);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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auto aspect = (float) display_h / (float) display_w;
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proj = Eigen::AlignedScaling3f(aspect, 1.0, -1.0);
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glUseProgram(pgm);
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glBindVertexArray(vao);
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glUniform4fv(0, 1, state.fg);
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glUniform1f(1, (GLfloat) glfwGetTime());
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glUniformMatrix4fv(2, 1, false, proj.data());
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glDrawElements(GL_TRIANGLES, (GLsizei) dynamic.cells().size(), GL_UNSIGNED_INT, nullptr);
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glBindVertexArray(0);
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glUseProgram(0);
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ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
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glfwSwapBuffers(window);
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}
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glDeleteBuffers(1, &vbo);
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glDeleteBuffers(1, &ibo);
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glDeleteVertexArrays(1, &vao);
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return EXIT_SUCCESS;
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}
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int main() {
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if (!glfwInit()) {
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std::cerr << "GLFW:Failed initialization" << std::endl;
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return EXIT_FAILURE;
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}
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
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glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
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auto *window = glfwCreateWindow(1280, 720, "Cosets Visualization", nullptr, nullptr);
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if (!window) {
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std::cerr << "GLFW:Failed to create window" << std::endl;
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return EXIT_FAILURE;
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}
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glfwMakeContextCurrent(window);
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glfwSwapInterval(1);
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gladLoadGLLoader((GLADloadproc) glfwGetProcAddress);
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#ifndef NDEBUG
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glEnable(GL_DEBUG_OUTPUT);
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glDebugMessageCallback(log_gl_debug_callback, nullptr);
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glDebugMessageControl(
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GL_DONT_CARE, GL_DEBUG_TYPE_OTHER,
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GL_DEBUG_SEVERITY_NOTIFICATION,
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0, nullptr, GL_FALSE
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);
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#endif
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IMGUI_CHECKVERSION();
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auto *context = ImGui::CreateContext();
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ImGui_ImplGlfw_InitForOpenGL(window, true);
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ImGui_ImplOpenGL3_Init("#version 130");
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set_style();
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int exit_code = EXIT_SUCCESS;
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try {
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exit_code = run(window, context);
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} catch (const std::exception &e) {
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std::cerr << e.what() << std::endl;
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exit_code = EXIT_FAILURE;
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}
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ImGui_ImplOpenGL3_Shutdown();
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ImGui_ImplGlfw_Shutdown();
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ImGui::DestroyContext();
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glfwDestroyWindow(window);
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glfwTerminate();
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return exit_code;
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}
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53
src/serialtest.cpp
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53
src/serialtest.cpp
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@@ -0,0 +1,53 @@
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#include <Eigen/Eigen>
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#include <fstream>
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#include <iostream>
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#include "meshlib.hpp"
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#include "meshlib_json.hpp"
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class Circle : public ml::MeshBase {
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public:
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PointsType::Scalar radius;
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Circle(PointsType::Scalar radius) : radius(radius) {}
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PointsType points() const override {
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PointsType t(1, 32);
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for (int i = 0; i < t.size(); ++i) {
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t(i) = 6.28318f * (float) i / 32;
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}
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PointsType out(3, 32);
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out.array().row(0) = t.array().sin();
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out.array().row(1) = t.array().cos();
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out.array().row(2).setZero();
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return out;
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}
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CellsType cells() const override {
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CellsType t(1, 31);
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for (int i = 0; i < t.size(); ++i) {
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t(i) = i;
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}
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CellsType out(3, 31);
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out.array().row(0) = 0;
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out.array().row(1) = t.array();
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out.array().row(2) = t.array() + 1;
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return out;
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}
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};
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int main() {
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auto omesh = Circle(1.0f);
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ml::write(omesh, "circle.pak");
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auto imesh = ml::read("circle.pak");
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std::cout << "= points ===============" << std::endl;
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std::cout << imesh.points() << std::endl;
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std::cout << "= cells ================" << std::endl;
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std::cout << imesh.cells() << std::endl;
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}
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