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Allow build without GUI/OpenGL by cmake -DNGP_BUILD_WITH_GUI=OFF #46

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Jan 18, 2022
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Allow build without GUI/OpenGL by cmake -DNGP_BUILD_WITH_GUI=OFF #46

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11 changes: 7 additions & 4 deletions include/neural-graphics-primitives/camera_path.h
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Original file line number Diff line number Diff line change
Expand Up @@ -70,8 +70,6 @@ struct CameraPath {
bool m_update_cam_from_path = false;
float m_playtime = 0.f;
float m_autoplayspeed = 0.f;
ImGuizmo::MODE m_gizmo_mode = ImGuizmo::LOCAL;
ImGuizmo::OPERATION m_gizmo_op = ImGuizmo::TRANSLATE;

const CameraKeyframe& get_keyframe(int i) { return m_keyframes[tcnn::clamp(i, 0, (int)m_keyframes.size()-1)]; }
CameraKeyframe eval_camera_path(float t) {
Expand All @@ -84,15 +82,20 @@ struct CameraPath {

void save(const std::string& filepath_string);
void load(const std::string& filepath_string, const Eigen::Matrix<float, 3, 4> &first_xform);

#ifdef NGP_GUI
ImGuizmo::MODE m_gizmo_mode = ImGuizmo::LOCAL;
ImGuizmo::OPERATION m_gizmo_op = ImGuizmo::TRANSLATE;
int imgui(char path_filename_buf[128], float frame_milliseconds, Eigen::Matrix<float, 3, 4> &camera, float slice_plane_z, float scale, float fov, float dof, float bounding_radius, const Eigen::Matrix<float, 3, 4> &first_xform);
bool imgui_viz(Eigen::Matrix<float, 4, 4> &view2proj, Eigen::Matrix<float, 4, 4> &world2proj, Eigen::Matrix<float, 4, 4> &world2view, Eigen::Vector2f focal, float aspect);
#endif
};

#ifdef NGP_GUI
void add_debug_line(const Eigen::Matrix<float, 4, 4>&proj, ImDrawList* list, Eigen::Vector3f a, Eigen::Vector3f b, uint32_t col=0xffffffff, float thickness=1.f);
void visualize_unit_cube(const Eigen::Matrix<float, 4, 4>& world2proj);
void visualize_nerf_camera(const Eigen::Matrix<float, 4, 4>& world2proj, const Eigen::Matrix<float, 3, 4>& xform, float aspect, uint32_t col = 0x80ffffff);


#endif

NGP_NAMESPACE_END

29 changes: 20 additions & 9 deletions src/camera_path.cu
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Expand Up @@ -12,30 +12,39 @@
* @author Thomas Müller & Alex Evans, NVIDIA
*/

#include <neural-graphics-primitives/camera_path.h>
#include <neural-graphics-primitives/common.h>

#ifdef NGP_GUI
#include <imgui/imgui.h>
#include <imgui/ImGuizmo.h> // tiny :)
#include <neural-graphics-primitives/camera_path.h>
#include <imgui/ImGuizmo.h>
#endif

#include <json/json.hpp>
#include <fstream>


NGP_NAMESPACE_BEGIN

using namespace Eigen;
using namespace nlohmann;

CameraKeyframe lerp(const CameraKeyframe& p0, const CameraKeyframe& p1, float t, float t0, float t1) {
t=(t-t0)/(t1-t0);
t = (t - t0) / (t1 - t0);
Eigen::Vector4f R1 = p1.R;
if (R1.dot(p0.R)<0.f) // take the short path

// take the short path
if (R1.dot(p0.R) < 0.f) {
R1=-R1;
}

return {
Eigen::Quaternionf(p0.R).slerp(t, Eigen::Quaternionf(R1)).coeffs(),
p0.T+(p1.T-p0.T)*t,
p0.slice+(p1.slice-p0.slice)*t,
p0.scale+(p1.scale-p0.scale)*t,
p0.fov+(p1.fov-p0.fov)*t,
p0.dof+(p1.dof-p0.dof)*t,
p0.T + (p1.T - p0.T) * t,
p0.slice + (p1.slice - p0.slice) * t,
p0.scale + (p1.scale - p0.scale) * t,
p0.fov + (p1.fov - p0.fov) * t,
p0.dof + (p1.dof - p0.dof) * t,
};
}

Expand Down Expand Up @@ -123,6 +132,7 @@ void CameraPath::load(const std::string& filepath_string, const Eigen::Matrix<fl
}
}

#ifdef NGP_GUI
int CameraPath::imgui(char path_filename_buf[128], float frame_milliseconds, Matrix<float, 3, 4> &camera, float slice_plane_z, float scale, float fov, float dof, float bounding_radius, const Eigen::Matrix<float, 3, 4> &first_xform) {
int n=std::max(0,int(m_keyframes.size())-1);
int read= 0; // 1=smooth, 2=hard
Expand Down Expand Up @@ -315,5 +325,6 @@ bool CameraPath::imgui_viz(Matrix<float, 4, 4> &view2proj, Matrix<float, 4, 4> &
}
return changed;
}
#endif //NGP_GUI

NGP_NAMESPACE_END
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