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main_anim.cpp
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main_anim.cpp
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#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <glm/gtc/type_ptr.hpp>
#include <glm/gtc/matrix_inverse.hpp>
#include <chrono>
#include <cstdlib>
#include <cstdio>
#include <string>
#include <sstream>
#include <fstream>
#include <iomanip>
#include "volrend/renderer.hpp"
#include "volrend/n3tree.hpp"
#include "volrend/internal/opts.hpp"
#include "volrend/internal/imwrite.hpp"
#include "imgui_impl_opengl3.h"
#include "imgui_impl_glfw.h"
#include "ImGuizmo.h"
#ifndef __EMSCRIPTEN__
#include "imfilebrowser.h"
#endif
#ifdef VOLREND_CUDA
#include "volrend/cuda/common.cuh"
#endif
namespace volrend {
namespace {
void local_sph(const glm::vec3& vec, const glm::vec3& ax, const glm::vec3& ay,
const glm::vec3& az, float& u, float& v) {
float x = glm::dot(vec, ax);
float y = glm::dot(vec, ay);
float z = glm::dot(vec, az);
u = atan2(y, x);
v = std::asin(z);
}
glm::vec3 local_unsph(float u, float v, const glm::vec3& ax,
const glm::vec3& ay, const glm::vec3& az) {
float x = std::cos(v) * std::cos(u);
float y = std::cos(v) * std::sin(u);
float z = std::sin(v);
return x * ax + y * ay + z * az;
}
template <class scalar_t>
scalar_t lerp(scalar_t a, scalar_t b, float q) {
return (1 - q) * a + q * b;
}
glm::vec3 sphc_interp(const glm::vec3& vec_start, const glm::vec3& vec_end,
float q, const glm::vec3& ax, const glm::vec3& ay,
const glm::vec3& az, int loops = 0) {
float d_start = glm::length(vec_start);
float d_end = glm::length(vec_end);
glm::vec3 vec_start_unit = vec_start / d_start;
glm::vec3 vec_end_unit = vec_end / d_end;
if (d_start == 0.f && d_end == 0.f) {
vec_start_unit = vec_end_unit = az;
} else if (d_start == 0.f && d_end != 0.f) {
vec_start_unit = vec_end_unit;
} else if (d_start != 0.f && d_end == 0.f) {
vec_end_unit = vec_start_unit;
}
float u_start, v_start, u_end, v_end;
local_sph(vec_start_unit, ax, ay, az, u_start, v_start);
local_sph(vec_end_unit, ax, ay, az, u_end, v_end);
auto test_v = local_unsph(u_start, v_start, ax, ay, az);
if (std::abs(u_start - u_end) > M_PI) {
if (u_end > u_start)
u_end -= 2 * M_PI;
else
u_start -= 2 * M_PI;
}
u_end += loops * 2 * M_PI;
float u_curr = lerp(u_start, u_end, q);
float v_curr = lerp(v_start, v_end, q);
float d_curr = lerp(d_start, d_end, q);
return local_unsph(u_curr, v_curr, ax, ay, az) * d_curr;
}
void save_screenshot(int width, int height, const std::string& path) {
std::vector<unsigned char> windowPixels(4 * width * height);
glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE,
&windowPixels[0]);
std::vector<unsigned char> flippedPixels(4 * width * height);
for (int row = 0; row < height; ++row)
memcpy(&flippedPixels[row * width * 4],
&windowPixels[(height - row - 1) * width * 4], 4 * width);
if (internal::write_png_file(path, flippedPixels.data(), width, height)) {
printf("Wrote %s", path.c_str());
} else {
printf("Failed to save screenshot\n");
}
}
struct MeshState {
MeshState() {}
explicit MeshState(const Mesh& mesh)
: rotation(mesh.rotation),
translation(mesh.translation),
scale(mesh.scale),
unlit(mesh.unlit) {}
void set_mesh(Mesh& mesh) const {
mesh.rotation = rotation;
mesh.translation = translation;
mesh.scale = scale;
mesh.unlit = unlit;
mesh.visible = true;
}
// Model transform, rotatin is axis-angle
glm::vec3 rotation, translation;
float scale = 1.f;
bool unlit = false;
};
// Represents 1 animation keyfrae
struct AnimKF {
AnimKF() {}
explicit AnimKF(const VolumeRenderer& rend) { from_renderer(rend); }
void from_renderer(const VolumeRenderer& rend) {
center = rend.camera.center;
origin = rend.camera.origin;
v_back = glm::normalize(rend.camera.v_back);
fx = rend.camera.fx;
fy = rend.camera.fy;
opt = rend.options;
mesh_state.clear();
for (const Mesh& mesh : rend.meshes) {
if (!mesh.visible) continue;
MeshState state{mesh};
mesh_state[mesh.name] = std::move(state);
}
}
void to_renderer(VolumeRenderer& rend) const {
rend.camera.center = center;
rend.camera.origin = origin;
rend.camera.v_back = glm::normalize(v_back);
rend.camera.fx = fx;
rend.camera.fy = fy;
rend.options = opt;
for (volrend::Mesh& mesh : rend.meshes) {
if (!mesh_state.count(mesh.name)) {
mesh.visible = false;
continue;
}
mesh_state.at(mesh.name).set_mesh(mesh);
}
}
// * State
glm::vec3 center, origin, v_back;
float fx, fy;
RenderOptions opt;
std::map<std::string, MeshState> mesh_state;
// * Configuration
// Animation duration
float t_max = 1.f;
// Whether to use spherical interpolation
bool spherical_interp = true;
// Extra CCW loops about world_up to make, only if spherical_interp
int loops = 0;
};
std::vector<AnimKF> keyframes;
struct AnimState {
// General config
float fps = 30.f;
std::string output_folder = "ani_out/";
// * Do not modify these
// If true, we're in animation mode and camera is on autopilot
bool animating = false;
// If true, we are animating in real-time for the user
// else, we're writing the video images
bool previewing = true;
// Key frame ID
size_t kf_idx = -1;
// Frame ID
size_t f_idx = 0;
void anim_from_start(bool previewing = true) {
if (keyframes.size() < 2) {
fprintf(stderr, "WARNING: cannot animate with < 2 keyframes\n");
return;
}
anim_once(keyframes[0], keyframes[1], previewing, -1.f, 0);
if (!previewing) {
std::filesystem::create_directories(output_folder);
}
f_idx = 0;
}
void anim_once(const AnimKF& start, const AnimKF& end,
bool previewing = true, float t_max = -1.f,
int kf_idx = -1) {
this->start = start;
this->end = end;
curr = start;
t = 0.f;
this->t_max = t_max > 0.f ? t_max : end.t_max;
this->previewing = previewing;
if (previewing) {
_last_tp = std::chrono::high_resolution_clock::now();
}
this->kf_idx = kf_idx;
animating = true;
}
void update(VolumeRenderer& rend) {
if (previewing) {
std::chrono::high_resolution_clock::time_point now_tp =
std::chrono::high_resolution_clock::now();
double ms =
std::chrono::duration<double, std::milli>(now_tp - _last_tp)
.count();
t += ms / 1000.f;
_last_tp = now_tp;
} else {
++f_idx;
t += 1.f / fps;
}
float q = std::min(t / t_max, 1.f);
curr.origin = lerp(start.origin, end.origin, q);
glm::vec3 az = rend.camera.v_world_up;
glm::vec3 ax, ay;
if (end.spherical_interp || end.mesh_state.size()) {
ax = glm::normalize(rend.camera.v_back -
glm::dot(rend.camera.v_back, az) * az);
ay = glm::normalize(glm::cross(az, ax));
}
if (end.spherical_interp) {
int loops = ~kf_idx ? end.loops : 0;
glm::vec3 start_vec = start.center - start.origin;
glm::vec3 end_vec = end.center - end.origin;
glm::vec3 curr_vec =
sphc_interp(start_vec, end_vec, q, ax, ay, az, loops);
curr.center = curr.origin + curr_vec;
curr.v_back =
sphc_interp(start.v_back, end.v_back, q, ax, ay, az, loops);
} else {
curr.center = lerp(start.center, end.center, q);
curr.v_back = lerp(start.v_back, end.v_back, q);
}
curr.fx = lerp(start.fx, end.fx, q);
curr.fy = lerp(start.fy, end.fy, q);
curr.opt = end.opt;
curr.opt.background_brightness = lerp(start.opt.background_brightness,
end.opt.background_brightness, q);
curr.opt.step_size = lerp(start.opt.step_size, end.opt.step_size, q);
curr.opt.stop_thresh =
lerp(start.opt.stop_thresh, end.opt.stop_thresh, q);
curr.opt.sigma_thresh =
lerp(start.opt.sigma_thresh, end.opt.sigma_thresh, q);
if (start.opt.enable_probe) {
for (int i = 0; i < 3; ++i) {
curr.opt.probe[i] =
lerp(start.opt.probe[i], end.opt.probe[i], q);
}
}
if (end.opt.show_grid) {
int start_depth =
start.opt.show_grid ? start.opt.grid_max_depth : 0;
if (start_depth != end.opt.grid_max_depth) {
curr.opt.grid_max_depth =
lerp(start_depth, end.opt.grid_max_depth, q);
}
}
for (int i = 0; i < 6; ++i) {
curr.opt.render_bbox[i] =
lerp(start.opt.render_bbox[i], end.opt.render_bbox[i], q);
}
glm::vec3 start_rot_dirs(start.opt.rot_dirs[0], start.opt.rot_dirs[1],
start.opt.rot_dirs[2]);
glm::vec3 end_rot_dirs(end.opt.rot_dirs[0], end.opt.rot_dirs[1],
end.opt.rot_dirs[2]);
if (start_rot_dirs != end_rot_dirs) {
glm::vec3 curr_rot_dirs =
sphc_interp(start_rot_dirs, end_rot_dirs, q, ax, ay, az);
for (int i = 0; i < 3; ++i) {
curr.opt.rot_dirs[i] = curr_rot_dirs[i];
}
}
curr.mesh_state = end.mesh_state;
for (const std::pair<std::string, MeshState>& meshp : end.mesh_state) {
std::string name = meshp.first;
if (start.mesh_state.count(name)) {
const MeshState& start_state = start.mesh_state[name];
const MeshState& end_state = meshp.second;
MeshState& state = curr.mesh_state[name];
state.rotation = sphc_interp(start_state.rotation,
end_state.rotation, q, ax, ay, az);
state.translation =
lerp(start_state.translation, end_state.translation, q);
state.scale = lerp(start_state.scale, end_state.scale, q);
}
}
curr.to_renderer(rend);
if (t >= t_max) {
if (kf_idx >= keyframes.size() - 2) {
animating = false;
} else {
++kf_idx;
anim_once(keyframes[kf_idx], keyframes[kf_idx + 1], previewing,
-1.f, kf_idx);
}
}
}
private:
AnimKF start, end, curr;
float t_max = 1.f;
float t = 0.0f;
std::chrono::high_resolution_clock::time_point _last_tp;
} anim;
#define GET_RENDERER(window) \
(*((VolumeRenderer*)glfwGetWindowUserPointer(window)))
int gizmo_mesh_op = ImGuizmo::TRANSLATE;
int gizmo_mesh_space = ImGuizmo::LOCAL;
void draw_imgui(VolumeRenderer& rend, N3Tree& tree) {
auto& cam = rend.camera;
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
// BEGIN gizmo handling
// clang-format off
static glm::mat4 camera_persp_prj(1.f, 0.f, 0.f, 0.f,
0.f, 1.f, 0.f, 0.f,
0.f, 0.f, -1.f, -1.f,
0.f, 0.f, -0.001f, 0.f);
// clang-format on
ImGuiIO& io = ImGui::GetIO();
camera_persp_prj[0][0] = cam.fx / cam.width * 2.0;
camera_persp_prj[1][1] = cam.fy / cam.height * 2.0;
ImGuizmo::SetOrthographic(false);
ImGuizmo::SetGizmoSizeClipSpace(0.05f);
ImGuizmo::BeginFrame();
ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y);
glm::mat4 w2c = glm::affineInverse(glm::mat4(cam.transform));
// END gizmo handling
ImGui::SetNextWindowSize(ImVec2(400.f, 480.f), ImGuiCond_Once);
// Begin animator window
ImGui::SetNextWindowPos(ImVec2(10, 10), ImGuiCond_Once);
ImGui::Begin("animator");
static ImGui::FileBrowser select_output_folder_dialog(
ImGuiFileBrowserFlags_SelectDirectory |
ImGuiFileBrowserFlags_CreateNewDir);
if (select_output_folder_dialog.GetTitle().empty()) {
select_output_folder_dialog.SetTitle("Set animation output folder");
}
if (ImGui::Button("Preview")) {
anim.anim_from_start(/* previewing */ true);
if (keyframes.size()) {
keyframes[0].to_renderer(rend);
}
}
ImGui::SameLine();
if (ImGui::Button("Render")) {
anim.anim_from_start(/* previewing */ false);
if (keyframes.size()) {
keyframes[0].to_renderer(rend);
}
}
ImGui::SameLine();
if (ImGui::Button("Stop")) {
anim.animating = false;
}
ImGui::Text("Output dir: %s", anim.output_folder.c_str());
if (ImGui::Button("Change output dir")) {
select_output_folder_dialog.Open();
}
ImGui::SameLine();
ImGui::PushItemWidth(60.f);
ImGui::InputFloat("anim fps", &anim.fps);
ImGui::PopItemWidth();
select_output_folder_dialog.Display();
if (select_output_folder_dialog.HasSelected()) {
std::string path = select_output_folder_dialog.GetSelected().string();
if (!path.empty() && path.back() != '/') path.push_back('/');
printf("Animation output folder set to %s\n", path.c_str());
anim.output_folder = path;
select_output_folder_dialog.ClearSelected();
}
static bool lock_fx_fy = true;
if (!anim.animating || anim.previewing) {
ImGui::SetNextTreeNodeOpen(true, ImGuiCond_Once);
if (ImGui::CollapsingHeader("Keyframes")) {
std::vector<int> kf_to_del;
for (size_t i = 0; i < keyframes.size(); ++i) {
std::string si = std::to_string(i);
AnimKF& kf = keyframes[i];
ImGui::Text("%s", si.c_str());
ImGui::SameLine();
if (ImGui::Button(("goto##kf" + si).c_str())) {
anim.anim_once(AnimKF{rend}, kf, true, 0.3f);
}
ImGui::SameLine();
if (ImGui::Button(("set##kf" + si).c_str())) {
kf.from_renderer(rend);
}
ImGui::SameLine();
if (i > 0) {
ImGui::TextUnformatted("dur=");
ImGui::SameLine();
ImGui::PushItemWidth(40.f);
ImGui::InputFloat(("s##kf" + si).c_str(), &kf.t_max);
ImGui::PopItemWidth();
ImGui::SameLine();
ImGui::Checkbox(("sph##kf" + si).c_str(),
&kf.spherical_interp);
if (kf.spherical_interp) {
ImGui::SameLine();
ImGui::PushItemWidth(30.f);
ImGui::InputInt(("loop##kf" + si).c_str(), &kf.loops,
0);
ImGui::PopItemWidth();
}
ImGui::SameLine();
}
if (ImGui::Button(("x##kf" + si).c_str())) {
kf_to_del.push_back(i);
}
ImGui::SameLine();
if (ImGui::TreeNode(("data##kf" + si).c_str())) {
if (ImGui::TreeNode("Camera")) {
ImGui::InputFloat3("center", glm::value_ptr(kf.center));
ImGui::InputFloat3("origin", glm::value_ptr(kf.origin));
ImGui::Spacing();
ImGui::InputFloat3("v_back_",
glm::value_ptr(kf.v_back));
if (ImGui::Button("normalize v_back")) {
kf.v_back = glm::normalize(kf.v_back);
}
ImGui::Checkbox("fx=fy", &lock_fx_fy);
if (lock_fx_fy) {
if (ImGui::InputFloat("focal", &kf.fx)) {
kf.fy = kf.fx;
}
} else {
ImGui::InputFloat("fx", &kf.fx);
ImGui::InputFloat("fy", &kf.fy);
}
ImGui::TreePop();
}
if (ImGui::TreeNode("Render")) {
static float inv_step_size = 1.0f / kf.opt.step_size;
if (ImGui::SliderFloat("1/eps", &inv_step_size, 128.f,
20000.f)) {
kf.opt.step_size = 1.f / inv_step_size;
}
ImGui::SliderFloat("sigma_thresh", &kf.opt.sigma_thresh,
0.f, 100.0f);
ImGui::SliderFloat("stop_thresh", &kf.opt.stop_thresh,
0.001f, 0.4f);
ImGui::SliderFloat("bg_brightness",
&kf.opt.background_brightness, 0.f,
1.0f);
ImGui::PushItemWidth(230);
ImGui::SliderFloat3("bb_min", kf.opt.render_bbox, 0.0,
1.0);
ImGui::SliderFloat3("bb_max", kf.opt.render_bbox + 3,
0.0, 1.0);
ImGui::SliderInt2(
"decomp", kf.opt.basis_minmax, 0,
std::max(tree.data_format.basis_dim - 1, 0));
ImGui::SliderFloat3("viewdir shift", kf.opt.rot_dirs,
-M_PI / 4, M_PI / 4);
ImGui::PopItemWidth();
if (ImGui::Button("Reset Viewdir Shift")) {
for (int i = 0; i < 3; ++i)
kf.opt.rot_dirs[i] = 0.f;
}
ImGui::Checkbox("Show Grid", &kf.opt.show_grid);
#ifdef VOLREND_CUDA
ImGui::SameLine();
ImGui::Checkbox("Render Depth", &kf.opt.render_depth);
#endif
if (kf.opt.show_grid) {
ImGui::SliderInt("grid max depth",
&kf.opt.grid_max_depth, 0, 7);
}
ImGui::TreePop();
}
if (kf.mesh_state.size()) {
if (ImGui::TreeNode("Meshes")) {
if (ImGui::Button("Rotate all")) {
for (auto& p : kf.mesh_state) {
p.second.rotation[2] += 2 * M_PI;
}
}
for (auto& p : kf.mesh_state) {
auto& mesh = p.second;
if (ImGui::TreeNode(p.first.c_str())) {
ImGui::PushItemWidth(230);
ImGui::InputFloat3(
"trans",
glm::value_ptr(mesh.translation));
ImGui::InputFloat3(
"rot", glm::value_ptr(mesh.rotation));
ImGui::InputFloat("scale", &mesh.scale);
ImGui::PopItemWidth();
ImGui::Checkbox("unlit", &mesh.unlit);
ImGui::TreePop();
}
}
ImGui::TreePop();
}
}
ImGui::TreePop();
}
}
if (kf_to_del.size()) {
size_t j = 0, ii = 0;
for (size_t i = 0; i < keyframes.size(); ++i) {
if (kf_to_del[j] == i) {
++j;
continue;
}
keyframes[ii] = keyframes[i];
++ii;
}
keyframes.resize(keyframes.size() - kf_to_del.size());
}
if (ImGui::Button("add KF at curr")) {
keyframes.emplace_back(rend);
}
}
}
ImGui::End();
if (!anim.animating || anim.previewing) {
static char title[128] = {0};
if (title[0] == 0) {
sprintf(title, "volrend backend: %s", rend.get_backend());
}
ImGui::SetNextWindowPos(ImVec2(10, 500), ImGuiCond_Once);
// Begin standard control window
ImGui::Begin(title);
#ifndef __EMSCRIPTEN__
static ImGui::FileBrowser open_obj_mesh_dialog(
ImGuiFileBrowserFlags_MultipleSelection);
if (open_obj_mesh_dialog.GetTitle().empty()) {
open_obj_mesh_dialog.SetTypeFilters({".obj"});
open_obj_mesh_dialog.SetTitle("Load basic triangle OBJ");
}
static ImGui::FileBrowser open_tree_dialog,
save_screenshot_dialog(ImGuiFileBrowserFlags_EnterNewFilename);
if (open_tree_dialog.GetTitle().empty()) {
open_tree_dialog.SetTypeFilters({".npz"});
open_tree_dialog.SetTitle("Load N3Tree npz from svox");
}
if (save_screenshot_dialog.GetTitle().empty()) {
save_screenshot_dialog.SetTypeFilters({".png"});
save_screenshot_dialog.SetTitle("Save screenshot (png)");
}
if (ImGui::Button("Open Tree")) {
open_tree_dialog.Open();
}
ImGui::SameLine();
if (ImGui::Button("Save Screenshot")) {
save_screenshot_dialog.Open();
}
open_tree_dialog.Display();
if (open_tree_dialog.HasSelected()) {
// Load octree
std::string path = open_tree_dialog.GetSelected().string();
printf("Load N3Tree npz: %s\n", path.c_str());
tree.open(path);
rend.set(tree);
open_tree_dialog.ClearSelected();
}
save_screenshot_dialog.Display();
if (save_screenshot_dialog.HasSelected()) {
// Save screenshot
std::string path = save_screenshot_dialog.GetSelected().string();
if (path.size() < 4 ||
path.compare(path.size() - 4, 4, ".png", 0, 4) != 0) {
path.append(".png");
}
save_screenshot_dialog.ClearSelected();
save_screenshot(cam.width, cam.height, path);
}
#endif
ImGui::SetNextTreeNodeOpen(false, ImGuiCond_Once);
if (ImGui::CollapsingHeader("Camera")) {
// Update vectors indirectly since we need to normalize on
// change (press update button) and it would be too confusing to
// keep normalizing
static glm::vec3 world_up_tmp = rend.camera.v_world_up;
static glm::vec3 world_down_prev = rend.camera.v_world_up;
static glm::vec3 back_tmp = rend.camera.v_back;
static glm::vec3 forward_prev = rend.camera.v_back;
if (cam.v_world_up != world_down_prev)
world_up_tmp = world_down_prev = cam.v_world_up;
if (cam.v_back != forward_prev)
back_tmp = forward_prev = cam.v_back;
ImGui::InputFloat3("center", glm::value_ptr(cam.center));
ImGui::InputFloat3("origin", glm::value_ptr(cam.origin));
ImGui::Checkbox("fx=fy", &lock_fx_fy);
if (lock_fx_fy) {
if (ImGui::InputFloat("focal", &cam.fx)) {
cam.fy = cam.fx;
}
} else {
ImGui::InputFloat("fx", &cam.fx);
ImGui::InputFloat("fy", &cam.fy);
}
if (ImGui::TreeNode("Directions")) {
ImGui::InputFloat3("world_up", glm::value_ptr(world_up_tmp));
ImGui::InputFloat3("back", glm::value_ptr(back_tmp));
if (ImGui::Button("normalize & update dirs")) {
cam.v_world_up = glm::normalize(world_up_tmp);
cam.v_back = glm::normalize(back_tmp);
}
ImGui::TreePop();
}
} // End camera node
ImGui::SetNextTreeNodeOpen(true, ImGuiCond_Once);
if (ImGui::CollapsingHeader("Render")) {
static float inv_step_size = 1.0f / rend.options.step_size;
if (ImGui::SliderFloat("1/eps", &inv_step_size, 128.f, 20000.f)) {
rend.options.step_size = 1.f / inv_step_size;
}
ImGui::SliderFloat("sigma_thresh", &rend.options.sigma_thresh, 0.f,
100.0f);
ImGui::SliderFloat("stop_thresh", &rend.options.stop_thresh, 0.001f,
0.4f);
ImGui::SliderFloat("bg_brightness",
&rend.options.background_brightness, 0.f, 1.0f);
} // End render node
ImGui::SetNextTreeNodeOpen(true, ImGuiCond_Once);
if (ImGui::CollapsingHeader("Visualization")) {
ImGui::PushItemWidth(230);
ImGui::SliderFloat3("bb_min", rend.options.render_bbox, 0.0, 1.0);
ImGui::SliderFloat3("bb_max", rend.options.render_bbox + 3, 0.0,
1.0);
ImGui::SliderInt2("decomp", rend.options.basis_minmax, 0,
std::max(tree.data_format.basis_dim - 1, 0));
ImGui::SliderFloat3("viewdir shift", rend.options.rot_dirs,
-M_PI / 4, M_PI / 4);
ImGui::PopItemWidth();
if (ImGui::Button("Reset Viewdir Shift")) {
for (int i = 0; i < 3; ++i) rend.options.rot_dirs[i] = 0.f;
}
ImGui::Checkbox("Show Grid", &rend.options.show_grid);
#ifdef VOLREND_CUDA
ImGui::SameLine();
ImGui::Checkbox("Render Depth", &rend.options.render_depth);
#endif
if (rend.options.show_grid) {
ImGui::SliderInt("grid max depth", &rend.options.grid_max_depth,
0, 7);
}
}
ImGui::SetNextTreeNodeOpen(true, ImGuiCond_Once);
if (ImGui::CollapsingHeader("Manipulation")) {
static std::vector<glm::mat4> gizmo_mesh_trans;
gizmo_mesh_trans.resize(rend.meshes.size());
ImGui::TextUnformatted("gizmo op");
ImGui::SameLine();
ImGui::RadioButton("trans##giztrans", &gizmo_mesh_op,
ImGuizmo::TRANSLATE);
ImGui::SameLine();
ImGui::RadioButton("rot##gizrot", &gizmo_mesh_op, ImGuizmo::ROTATE);
ImGui::SameLine();
ImGui::RadioButton("scale##gizscale", &gizmo_mesh_op,
ImGuizmo::SCALE_Z);
ImGui::TextUnformatted("gizmo space");
ImGui::SameLine();
ImGui::RadioButton("local##gizlocal", &gizmo_mesh_space,
ImGuizmo::LOCAL);
ImGui::SameLine();
ImGui::RadioButton("world##gizworld", &gizmo_mesh_space,
ImGuizmo::WORLD);
ImGui::BeginGroup();
std::vector<int> meshes_to_del;
for (int i = 0; i < (int)rend.meshes.size(); ++i) {
auto& mesh = rend.meshes[i];
if (ImGui::TreeNode(mesh.name.c_str())) {
if (mesh.visible) {
glm::mat4& gizmo_trans = gizmo_mesh_trans[i];
gizmo_trans = mesh.transform_;
if (gizmo_mesh_op == ImGuizmo::SCALE_Z) {
glm::mat4 tmp(1);
tmp[3] = gizmo_trans[3];
gizmo_trans = tmp;
}
ImGuizmo::SetID(i + 1);
if (ImGuizmo::Manipulate(
glm::value_ptr(w2c),
glm::value_ptr(camera_persp_prj),
(ImGuizmo::OPERATION)gizmo_mesh_op,
(ImGuizmo::MODE)gizmo_mesh_space,
glm::value_ptr(gizmo_trans), NULL, NULL, NULL,
NULL)) {
if (gizmo_mesh_op == ImGuizmo::ROTATE) {
glm::quat rot_q = glm::quat_cast(
glm::mat3(gizmo_trans) / mesh.scale);
mesh.rotation =
glm::axis(rot_q) * glm::angle(rot_q);
} else if (gizmo_mesh_op == ImGuizmo::SCALE_Z) {
mesh.scale *=
gizmo_trans[2][2] /
mesh.transform_[2][2]; // max_scale;
}
mesh.translation = gizmo_trans[3];
}
}
ImGui::PushItemWidth(230);
ImGui::InputFloat3("trans",
glm::value_ptr(mesh.translation));
ImGui::InputFloat3("rot", glm::value_ptr(mesh.rotation));
ImGui::InputFloat("scale", &mesh.scale);
ImGui::PopItemWidth();
ImGui::Checkbox("visible", &mesh.visible);
ImGui::SameLine();
ImGui::Checkbox("unlit", &mesh.unlit);
ImGui::SameLine();
if (ImGui::Button("delete")) meshes_to_del.push_back(i);
ImGui::TreePop();
}
}
if (meshes_to_del.size()) {
int j = 0;
std::vector<Mesh> tmp;
tmp.reserve(rend.meshes.size() - meshes_to_del.size());
for (int i = 0; i < rend.meshes.size(); ++i) {
if (i == meshes_to_del[j]) {
++j;
continue;
}
tmp.push_back(std::move(rend.meshes[i]));
}
rend.meshes.swap(tmp);
}
ImGui::EndGroup();
if (ImGui::Button("Sphere##addsphere")) {
static int sphereid = 0;
{
Mesh sph = Mesh::Sphere();
sph.scale = 0.1f;
sph.translation[2] = 1.0f;
sph.update();
if (sphereid)
sph.name = sph.name + std::to_string(sphereid);
++sphereid;
rend.meshes.push_back(std::move(sph));
}
}
ImGui::SameLine();
if (ImGui::Button("Cube##addcube")) {
static int cubeid = 0;
{
Mesh cube = Mesh::Cube();
cube.scale = 0.2f;
cube.translation[2] = 1.0f;
cube.update();
if (cubeid) cube.name = cube.name + std::to_string(cubeid);
++cubeid;
rend.meshes.push_back(std::move(cube));
}
}
ImGui::SameLine();
if (ImGui::Button("Latti##addlattice")) {
static int lattid = 0;
{
Mesh latt = Mesh::Lattice();
if (tree.N > 0) {
latt.scale = 1.f / std::min(std::min(tree.scale[0],
tree.scale[1]),
tree.scale[2]);
for (int i = 0; i < 3; ++i) {
latt.translation[i] =
-1.f / tree.scale[0] * tree.offset[0];
}
}
latt.update();
if (lattid) latt.name = latt.name + std::to_string(lattid);
++lattid;
rend.meshes.push_back(std::move(latt));
}
}
ImGui::SameLine();
if (ImGui::Button("Load OBJ")) {
open_obj_mesh_dialog.Open();
}
ImGui::SameLine();
if (ImGui::Button("Clear All")) {
rend.meshes.clear();
}
#ifdef VOLREND_CUDA
if (tree.capacity) {
ImGui::BeginGroup();
ImGui::Checkbox("Enable Lumisphere Probe",
&rend.options.enable_probe);
if (rend.options.enable_probe) {
ImGui::SetNextTreeNodeOpen(true, ImGuiCond_Once);
if (ImGui::TreeNode("Probe")) {
static glm::mat4 probe_trans;
static bool show_probe_gizmo = true;
float* probe = rend.options.probe;
probe_trans = glm::translate(
glm::mat4(1.f),
glm::vec3(probe[0], probe[1], probe[2]));
ImGui::Checkbox("Show gizmo", &show_probe_gizmo);
if (show_probe_gizmo) {
ImGuizmo::SetID(0);
if (ImGuizmo::Manipulate(
glm::value_ptr(w2c),
glm::value_ptr(camera_persp_prj),
ImGuizmo::TRANSLATE, ImGuizmo::LOCAL,
glm::value_ptr(probe_trans), NULL, NULL,
NULL, NULL)) {
for (int i = 0; i < 3; ++i)
probe[i] = probe_trans[3][i];
}
}
ImGui::InputFloat3("probe", probe);
ImGui::SliderInt("probe_win_sz",
&rend.options.probe_disp_size, 50,
800);
ImGui::TreePop();
}
}
ImGui::EndGroup();
}
#endif
}
open_obj_mesh_dialog.Display();
if (open_obj_mesh_dialog.HasSelected()) {
// Load mesh
auto sels = open_obj_mesh_dialog.GetMultiSelected();
for (auto& fpath : sels) {
const std::string path = fpath.string();
printf("Load OBJ: %s\n", path.c_str());
Mesh tmp = Mesh::load_basic_obj(path);
if (tmp.vert.size()) {
// Auto offset
std::ifstream ifs(path + ".offs");
if (ifs) {
ifs >> tmp.translation.x >> tmp.translation.y >>
tmp.translation.z;
if (ifs) {
ifs >> tmp.scale;
}
}
tmp.update();
rend.meshes.push_back(std::move(tmp));
puts("Load success\n");
} else {
puts("Load failed\n");
}
}
open_obj_mesh_dialog.ClearSelected();
}
ImGui::End();
}
ImGui::Render();
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
}
void glfw_error_callback(int error, const char* description) {
fputs(description, stderr);
}
void glfw_key_callback(GLFWwindow* window, int key, int scancode, int action,
int mods) {
ImGui_ImplGlfw_KeyCallback(window, key, scancode, action, mods);
if (ImGui::GetIO().WantCaptureKeyboard) return;
if (action == GLFW_PRESS || action == GLFW_REPEAT) {
auto& rend = GET_RENDERER(window);
auto& cam = rend.camera;
switch (key) {
case GLFW_KEY_ESCAPE:
glfwSetWindowShouldClose(window, GL_TRUE);
break;
case GLFW_KEY_W:
case GLFW_KEY_S:
case GLFW_KEY_A:
case GLFW_KEY_D:
case GLFW_KEY_E:
case GLFW_KEY_Q:
if (!anim.animating) {
// Camera movement
float speed = 0.002f;
if (mods & GLFW_MOD_SHIFT) speed *= 5.f;
if (key == GLFW_KEY_S || key == GLFW_KEY_A ||
key == GLFW_KEY_E)
speed = -speed;
const auto& vec =
(key == GLFW_KEY_A || key == GLFW_KEY_D) ? cam.v_right
: (key == GLFW_KEY_W || key == GLFW_KEY_S) ? -cam.v_back
: -cam.v_up;
cam.move(vec * speed);
}
break;
case GLFW_KEY_Z: {
// Cycle gizmo op
if (gizmo_mesh_op == ImGuizmo::TRANSLATE)
gizmo_mesh_op = ImGuizmo::ROTATE;
else if (gizmo_mesh_op == ImGuizmo::ROTATE)
gizmo_mesh_op = ImGuizmo::SCALE_Z;
else
gizmo_mesh_op = ImGuizmo::TRANSLATE;
} break;
case GLFW_KEY_X: {
// Cycle gizmo space
if (gizmo_mesh_space == ImGuizmo::LOCAL)
gizmo_mesh_space = ImGuizmo::WORLD;
else
gizmo_mesh_space = ImGuizmo::LOCAL;
} break;
#ifdef VOLREND_CUDA
case GLFW_KEY_I:
case GLFW_KEY_J:
case GLFW_KEY_K:
case GLFW_KEY_L:
case GLFW_KEY_U:
case GLFW_KEY_O:
if (rend.options.enable_probe) {
// Probe movement
float speed = 0.002f;
if (mods & GLFW_MOD_SHIFT) speed *= 5.f;
if (key == GLFW_KEY_J || key == GLFW_KEY_K ||
key == GLFW_KEY_U)
speed = -speed;
int dim = (key == GLFW_KEY_J || key == GLFW_KEY_L) ? 0
: (key == GLFW_KEY_I || key == GLFW_KEY_K) ? 1
: 2;
rend.options.probe[dim] += speed;
}
break;