main.cpp

#include <iostream>

#include "axis3d.h"
#include "camera.h"
#include "constants.h"
#include "engine.h"
#include "gltf.h"
#include "lineset.h"
#include "mesh.h"

class TestApp : public ogleng::Engine {

    ogleng::OrbitCamera camera;

    GLTFScene gltf;
    ogleng::Axis3D axis;

    bool draw_axis = true;
    bool wireframe = false;

    void orbit_camera_control() {
        if (get_mouse(ogleng::Input::MOUSE_LEFT).held) {
            camera.rotate(get_dmouse_x(), get_dmouse_y());
        }
        if (get_mouse(ogleng::Input::MOUSE_MIDDLE).held) {
            camera.pan(get_dmouse_x(), get_dmouse_y());
        }
        camera.zoom(get_scroll_y());
    }

    bool create() override {
        axis.init();

        gltf = GLTFScene("../data/arissa.glb");

        return true;
    }

    bool destroy() override {
        return true;
    }
    bool update(float dt) override {
        if (get_key(ogleng::Input::Key::ESCAPE).pressed) {
            return false;
        }

        orbit_camera_control();

        ogleng::mat4 vp = camera.projection() * camera.view();

        if (draw_axis) {
            axis.draw(vp);
        }

        gltf.update(get_current_time());
        gltf.draw(vp, wireframe);

        return true;
    }

    bool imgui(float dt) override {
        ImGui::Begin("Misc.");
        ImGui::Text("ImGUI says \"Hello!\"");
        ImGui::Text("FPS: %.0f - %.2f ms per frame", fps, dt * 1000.0f);
        ImGui::Checkbox("Vsync", &vsync);
        ImGui::Checkbox("Draw axis", &draw_axis);
        ImGui::Checkbox("Wireframe", &wireframe);

        gltf.imgui_display(get_current_time());

        ImGui::End();
        return true;
    }

    // hook into the window resize calback
    bool u_framebuffer_size_callback(int width, int height) override {
        camera.set_aspect((float)width / (float)height);
        // continue with the original callback function
        return false;
    }
};

int main(int argc, char *argv[]) {
    TestApp app;
    if (app.initialize(1280, 720, "OpenGL Viewer")) {
        app.start();
    }
    return 0;
}