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#include "libslic3r/libslic3r.h"
#include "Camera.hpp"
#include "3DScene.hpp"
#if ENABLE_CAMERA_STATISTICS
#include "GUI_App.hpp"
#endif // ENABLE_CAMERA_STATISTICS
#include <GL/glew.h>
static const float GIMBALL_LOCK_THETA_MAX = 180.0f;
// phi / theta angles to orient the camera.
static const float VIEW_DEFAULT[2] = { 45.0f, 45.0f };
static const float VIEW_LEFT[2] = { 90.0f, 90.0f };
static const float VIEW_RIGHT[2] = { -90.0f, 90.0f };
static const float VIEW_TOP[2] = { 0.0f, 0.0f };
static const float VIEW_BOTTOM[2] = { 0.0f, 180.0f };
static const float VIEW_FRONT[2] = { 0.0f, 90.0f };
static const float VIEW_REAR[2] = { 180.0f, 90.0f };
namespace Slic3r {
namespace GUI {
const float Camera::DefaultDistance = 1000.0f;
double Camera::FrustrumMinZSize = 50.0;
double Camera::FrustrumZMargin = 10.0;
Camera::Camera()
: type(Ortho)
, zoom(1.0f)
, phi(45.0f)
, distance(DefaultDistance)
, requires_zoom_to_bed(false)
, inverted_phi(false)
, m_theta(45.0f)
, m_target(Vec3d::Zero())
, m_view_matrix(Transform3d::Identity())
, m_projection_matrix(Transform3d::Identity())
{
}
std::string Camera::get_type_as_string() const
{
switch (type)
{
default:
case Unknown:
return "unknown";
// case Perspective:
// return "perspective";
case Ortho:
return "orthographic";
};
}
void Camera::set_target(const Vec3d& target)
{
m_target = target;
m_target(0) = clamp(m_scene_box.min(0), m_scene_box.max(0), m_target(0));
m_target(1) = clamp(m_scene_box.min(1), m_scene_box.max(1), m_target(1));
m_target(2) = clamp(m_scene_box.min(2), m_scene_box.max(2), m_target(2));
}
void Camera::set_theta(float theta, bool apply_limit)
{
if (apply_limit)
m_theta = clamp(0.0f, GIMBALL_LOCK_THETA_MAX, theta);
else
{
m_theta = fmod(theta, 360.0f);
if (m_theta < 0.0f)
m_theta += 360.0f;
}
}
bool Camera::select_view(const std::string& direction)
{
const float* dir_vec = nullptr;
if (direction == "iso")
dir_vec = VIEW_DEFAULT;
else if (direction == "left")
dir_vec = VIEW_LEFT;
else if (direction == "right")
dir_vec = VIEW_RIGHT;
else if (direction == "top")
dir_vec = VIEW_TOP;
else if (direction == "bottom")
dir_vec = VIEW_BOTTOM;
else if (direction == "front")
dir_vec = VIEW_FRONT;
else if (direction == "rear")
dir_vec = VIEW_REAR;
if (dir_vec != nullptr)
{
phi = dir_vec[0];
set_theta(dir_vec[1], false);
return true;
}
else
return false;
}
void Camera::apply_viewport(int x, int y, unsigned int w, unsigned int h) const
{
glsafe(::glViewport(0, 0, w, h));
glsafe(::glGetIntegerv(GL_VIEWPORT, m_viewport.data()));
}
void Camera::apply_view_matrix() const
{
double theta_rad = Geometry::deg2rad(-(double)m_theta);
double phi_rad = Geometry::deg2rad((double)phi);
double sin_theta = ::sin(theta_rad);
Vec3d camera_pos = m_target + (double)distance * Vec3d(sin_theta * ::sin(phi_rad), sin_theta * ::cos(phi_rad), ::cos(theta_rad));
glsafe(::glMatrixMode(GL_MODELVIEW));
glsafe(::glLoadIdentity());
glsafe(::glRotatef(-m_theta, 1.0f, 0.0f, 0.0f)); // pitch
glsafe(::glRotatef(phi, 0.0f, 0.0f, 1.0f)); // yaw
glsafe(::glTranslated(-camera_pos(0), -camera_pos(1), -camera_pos(2)));
glsafe(::glGetDoublev(GL_MODELVIEW_MATRIX, m_view_matrix.data()));
}
void Camera::apply_projection(const BoundingBoxf3& box) const
{
m_frustrum_zs = calc_tight_frustrum_zs_around(box);
switch (type)
{
case Ortho:
{
double w2 = (double)m_viewport[2];
double h2 = (double)m_viewport[3];
double two_zoom = 2.0 * zoom;
if (two_zoom != 0.0)
{
double inv_two_zoom = 1.0 / two_zoom;
w2 *= inv_two_zoom;
h2 *= inv_two_zoom;
}
apply_ortho_projection(-w2, w2, -h2, h2, m_frustrum_zs.first, m_frustrum_zs.second);
break;
}
// case Perspective:
// {
// }
}
}
#if ENABLE_CAMERA_STATISTICS
void Camera::debug_render() const
{
ImGuiWrapper& imgui = *wxGetApp().imgui();
imgui.set_next_window_bg_alpha(0.5f);
imgui.begin(std::string("Camera statistics"), ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse);
std::string type = get_type_as_string();
Vec3f position = get_position().cast<float>();
Vec3f target = m_target.cast<float>();
Vec3f forward = get_dir_forward().cast<float>();
Vec3f right = get_dir_right().cast<float>();
Vec3f up = get_dir_up().cast<float>();
float nearZ = (float)m_frustrum_zs.first;
float farZ = (float)m_frustrum_zs.second;
float deltaZ = farZ - nearZ;
ImGui::InputText("Type", const_cast<char*>(type.data()), type.length(), ImGuiInputTextFlags_ReadOnly);
ImGui::Separator();
ImGui::InputFloat3("Position", position.data(), "%.6f", ImGuiInputTextFlags_ReadOnly);
ImGui::InputFloat3("Target", target.data(), "%.6f", ImGuiInputTextFlags_ReadOnly);
ImGui::Separator();
ImGui::InputFloat3("Forward", forward.data(), "%.6f", ImGuiInputTextFlags_ReadOnly);
ImGui::InputFloat3("Right", right.data(), "%.6f", ImGuiInputTextFlags_ReadOnly);
ImGui::InputFloat3("Up", up.data(), "%.6f", ImGuiInputTextFlags_ReadOnly);
ImGui::Separator();
ImGui::InputFloat("Near Z", &nearZ, 0.0f, 0.0f, "%.6f", ImGuiInputTextFlags_ReadOnly);
ImGui::InputFloat("Far Z", &farZ, 0.0f, 0.0f, "%.6f", ImGuiInputTextFlags_ReadOnly);
ImGui::InputFloat("Delta Z", &deltaZ, 0.0f, 0.0f, "%.6f", ImGuiInputTextFlags_ReadOnly);
imgui.end();
}
#endif // ENABLE_CAMERA_STATISTICS
void Camera::apply_ortho_projection(double x_min, double x_max, double y_min, double y_max, double z_min, double z_max) const
{
glsafe(::glMatrixMode(GL_PROJECTION));
glsafe(::glLoadIdentity());
glsafe(::glOrtho(x_min, x_max, y_min, y_max, z_min, z_max));
glsafe(::glGetDoublev(GL_PROJECTION_MATRIX, m_projection_matrix.data()));
glsafe(::glMatrixMode(GL_MODELVIEW));
}
std::pair<double, double> Camera::calc_tight_frustrum_zs_around(const BoundingBoxf3& box) const
{
std::pair<double, double> ret = std::make_pair(DBL_MAX, -DBL_MAX);
Vec3d bb_min = box.min;
Vec3d bb_max = box.max;
// bbox vertices in world space
std::vector<Vec3d> vertices;
vertices.reserve(8);
vertices.push_back(bb_min);
vertices.emplace_back(bb_max(0), bb_min(1), bb_min(2));
vertices.emplace_back(bb_max(0), bb_max(1), bb_min(2));
vertices.emplace_back(bb_min(0), bb_max(1), bb_min(2));
vertices.emplace_back(bb_min(0), bb_min(1), bb_max(2));
vertices.emplace_back(bb_max(0), bb_min(1), bb_max(2));
vertices.push_back(bb_max);
vertices.emplace_back(bb_min(0), bb_max(1), bb_max(2));
// set the Z range in eye coordinates (only negative Zs are in front of the camera)
for (const Vec3d& v : vertices)
{
// ensure non-negative values
double z = std::max(-(m_view_matrix * v)(2), 0.0);
ret.first = std::min(ret.first, z);
ret.second = std::max(ret.second, z);
}
// apply margin
ret.first -= FrustrumZMargin;
ret.second += FrustrumZMargin;
// ensure min size
if (ret.second - ret.first < FrustrumMinZSize)
{
double mid_z = 0.5 * (ret.first + ret.second);
double half_size = 0.5 * FrustrumMinZSize;
ret.first = mid_z - half_size;
ret.second = mid_z + half_size;
}
assert(ret.first > 0.0);
return ret;
}
} // GUI
} // Slic3r
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