1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
|
#include "libslic3r/libslic3r.h"
#include "Camera.hpp"
#if !ENABLE_THUMBNAIL_GENERATOR
#include "3DScene.hpp"
#endif // !ENABLE_THUMBNAIL_GENERATOR
#include "GUI_App.hpp"
#include "AppConfig.hpp"
#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 double Camera::DefaultDistance = 1000.0;
#if ENABLE_THUMBNAIL_GENERATOR
const double Camera::DefaultZoomToBoxMarginFactor = 1.025;
const double Camera::DefaultZoomToVolumesMarginFactor = 1.025;
#endif // ENABLE_THUMBNAIL_GENERATOR
double Camera::FrustrumMinZRange = 50.0;
double Camera::FrustrumMinNearZ = 100.0;
double Camera::FrustrumZMargin = 10.0;
double Camera::MaxFovDeg = 60.0;
Camera::Camera()
: phi(45.0f)
, requires_zoom_to_bed(false)
, inverted_phi(false)
, m_type(Perspective)
, m_target(Vec3d::Zero())
, m_theta(45.0f)
, m_zoom(1.0)
, m_distance(DefaultDistance)
, m_gui_scale(1.0)
, m_view_matrix(Transform3d::Identity())
, m_projection_matrix(Transform3d::Identity())
{
}
std::string Camera::get_type_as_string() const
{
switch (m_type)
{
case Unknown:
return "unknown";
case Perspective:
return "perspective";
default:
case Ortho:
return "orthographic";
};
}
void Camera::set_type(EType type)
{
if (m_type != type)
{
m_type = type;
wxGetApp().app_config->set("use_perspective_camera", (m_type == Perspective) ? "1" : "0");
wxGetApp().app_config->save();
}
}
void Camera::set_type(const std::string& type)
{
if (type == "1")
set_type(Perspective);
else
set_type(Ortho);
}
void Camera::select_next_type()
{
unsigned char next = (unsigned char)m_type + 1;
if (next == (unsigned char)Num_types)
next = 1;
set_type((EType)next);
}
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;
}
}
void Camera::set_zoom(double zoom, const BoundingBoxf3& max_box, int canvas_w, int canvas_h)
{
zoom = std::max(std::min(zoom, 4.0), -4.0) / 10.0;
zoom = m_zoom / (1.0 - zoom);
// Don't allow to zoom too far outside the scene.
double zoom_min = calc_zoom_to_bounding_box_factor(max_box, canvas_w, canvas_h);
if (zoom_min > 0.0)
zoom = std::max(zoom, zoom_min * 0.7);
// Don't allow to zoom too close to the scene.
zoom = std::min(zoom, 100.0);
m_zoom = zoom;
}
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;
}
double Camera::get_fov() const
{
switch (m_type)
{
case Perspective:
return 2.0 * Geometry::rad2deg(std::atan(1.0 / m_projection_matrix.matrix()(1, 1)));
default:
case Ortho:
return 0.0;
};
}
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 + m_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, double near_z, double far_z) const
{
set_distance(DefaultDistance);
double w = 0.0;
double h = 0.0;
while (true)
{
m_frustrum_zs = calc_tight_frustrum_zs_around(box);
if (near_z > 0.0)
m_frustrum_zs.first = std::min(m_frustrum_zs.first, near_z);
if (far_z > 0.0)
m_frustrum_zs.second = std::max(m_frustrum_zs.second, far_z);
w = 0.5 * (double)m_viewport[2];
h = 0.5 * (double)m_viewport[3];
if (m_zoom != 0.0)
{
double inv_zoom = 1.0 / m_zoom;
w *= inv_zoom;
h *= inv_zoom;
}
switch (m_type)
{
default:
case Ortho:
{
m_gui_scale = 1.0;
break;
}
case Perspective:
{
// scale near plane to keep w and h constant on the plane at z = m_distance
double scale = m_frustrum_zs.first / m_distance;
w *= scale;
h *= scale;
m_gui_scale = scale;
break;
}
}
if (m_type == Perspective)
{
double fov_deg = Geometry::rad2deg(2.0 * std::atan(h / m_frustrum_zs.first));
// adjust camera distance to keep fov in a limited range
if (fov_deg > MaxFovDeg)
{
double delta_z = h / ::tan(0.5 * Geometry::deg2rad(MaxFovDeg)) - m_frustrum_zs.first;
if (delta_z > 0.001)
set_distance(m_distance + delta_z);
else
break;
}
else
break;
}
else
break;
}
glsafe(::glMatrixMode(GL_PROJECTION));
glsafe(::glLoadIdentity());
switch (m_type)
{
default:
case Ortho:
{
glsafe(::glOrtho(-w, w, -h, h, m_frustrum_zs.first, m_frustrum_zs.second));
break;
}
case Perspective:
{
glsafe(::glFrustum(-w, w, -h, h, m_frustrum_zs.first, m_frustrum_zs.second));
break;
}
}
glsafe(::glGetDoublev(GL_PROJECTION_MATRIX, m_projection_matrix.data()));
glsafe(::glMatrixMode(GL_MODELVIEW));
}
#if ENABLE_THUMBNAIL_GENERATOR
void Camera::zoom_to_box(const BoundingBoxf3& box, int canvas_w, int canvas_h, double margin_factor)
#else
void Camera::zoom_to_box(const BoundingBoxf3& box, int canvas_w, int canvas_h)
#endif // ENABLE_THUMBNAIL_GENERATOR
{
// Calculate the zoom factor needed to adjust the view around the given box.
#if ENABLE_THUMBNAIL_GENERATOR
double zoom = calc_zoom_to_bounding_box_factor(box, canvas_w, canvas_h, margin_factor);
#else
double zoom = calc_zoom_to_bounding_box_factor(box, canvas_w, canvas_h);
#endif // ENABLE_THUMBNAIL_GENERATOR
if (zoom > 0.0)
{
m_zoom = zoom;
// center view around box center
m_target = box.center();
}
}
#if ENABLE_THUMBNAIL_GENERATOR
void Camera::zoom_to_volumes(const GLVolumePtrs& volumes, int canvas_w, int canvas_h, double margin_factor)
{
Vec3d center;
double zoom = calc_zoom_to_volumes_factor(volumes, canvas_w, canvas_h, center, margin_factor);
if (zoom > 0.0)
{
m_zoom = zoom;
// center view around the calculated center
m_target = center;
}
}
#endif // ENABLE_THUMBNAIL_GENERATOR
#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>();
float distance = (float)get_distance();
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;
float zoom = (float)m_zoom;
float fov = (float)get_fov();
float gui_scale = (float)get_gui_scale();
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::InputFloat("Distance", &distance, 0.0f, 0.0f, "%.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::Separator();
ImGui::InputFloat("Zoom", &zoom, 0.0f, 0.0f, "%.6f", ImGuiInputTextFlags_ReadOnly);
ImGui::InputFloat("Fov", &fov, 0.0f, 0.0f, "%.6f", ImGuiInputTextFlags_ReadOnly);
ImGui::Separator();
ImGui::InputFloat("GUI scale", &gui_scale, 0.0f, 0.0f, "%.6f", ImGuiInputTextFlags_ReadOnly);
imgui.end();
}
#endif // ENABLE_CAMERA_STATISTICS
std::pair<double, double> Camera::calc_tight_frustrum_zs_around(const BoundingBoxf3& box) const
{
std::pair<double, double> ret;
while (true)
{
ret = std::make_pair(DBL_MAX, -DBL_MAX);
// box vertices in world space
std::vector<Vec3d> vertices;
vertices.reserve(8);
vertices.push_back(box.min);
vertices.emplace_back(box.max(0), box.min(1), box.min(2));
vertices.emplace_back(box.max(0), box.max(1), box.min(2));
vertices.emplace_back(box.min(0), box.max(1), box.min(2));
vertices.emplace_back(box.min(0), box.min(1), box.max(2));
vertices.emplace_back(box.max(0), box.min(1), box.max(2));
vertices.push_back(box.max);
vertices.emplace_back(box.min(0), box.max(1), box.max(2));
// set the Z range in eye coordinates (negative Zs are in front of the camera)
for (const Vec3d& v : vertices)
{
double z = -(m_view_matrix * v)(2);
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 < FrustrumMinZRange)
{
double mid_z = 0.5 * (ret.first + ret.second);
double half_size = 0.5 * FrustrumMinZRange;
ret.first = mid_z - half_size;
ret.second = mid_z + half_size;
}
if (ret.first >= FrustrumMinNearZ)
break;
// ensure min Near Z
set_distance(m_distance + FrustrumMinNearZ - ret.first);
}
return ret;
}
#if ENABLE_THUMBNAIL_GENERATOR
double Camera::calc_zoom_to_bounding_box_factor(const BoundingBoxf3& box, int canvas_w, int canvas_h, double margin_factor) const
#else
double Camera::calc_zoom_to_bounding_box_factor(const BoundingBoxf3& box, int canvas_w, int canvas_h) const
#endif // ENABLE_THUMBNAIL_GENERATOR
{
double max_bb_size = box.max_size();
if (max_bb_size == 0.0)
return -1.0;
// project the box vertices on a plane perpendicular to the camera forward axis
// then calculates the vertices coordinate on this plane along the camera xy axes
// ensure that the view matrix is updated
apply_view_matrix();
Vec3d right = get_dir_right();
Vec3d up = get_dir_up();
Vec3d forward = get_dir_forward();
Vec3d bb_center = box.center();
// box vertices in world space
std::vector<Vec3d> vertices;
vertices.reserve(8);
vertices.push_back(box.min);
vertices.emplace_back(box.max(0), box.min(1), box.min(2));
vertices.emplace_back(box.max(0), box.max(1), box.min(2));
vertices.emplace_back(box.min(0), box.max(1), box.min(2));
vertices.emplace_back(box.min(0), box.min(1), box.max(2));
vertices.emplace_back(box.max(0), box.min(1), box.max(2));
vertices.push_back(box.max);
vertices.emplace_back(box.min(0), box.max(1), box.max(2));
double min_x = DBL_MAX;
double min_y = DBL_MAX;
double max_x = -DBL_MAX;
double max_y = -DBL_MAX;
#if !ENABLE_THUMBNAIL_GENERATOR
// margin factor to give some empty space around the box
double margin_factor = 1.25;
#endif // !ENABLE_THUMBNAIL_GENERATOR
for (const Vec3d& v : vertices)
{
// project vertex on the plane perpendicular to camera forward axis
Vec3d pos = v - bb_center;
Vec3d proj_on_plane = pos - pos.dot(forward) * forward;
// calculates vertex coordinate along camera xy axes
double x_on_plane = proj_on_plane.dot(right);
double y_on_plane = proj_on_plane.dot(up);
min_x = std::min(min_x, x_on_plane);
min_y = std::min(min_y, y_on_plane);
max_x = std::max(max_x, x_on_plane);
max_y = std::max(max_y, y_on_plane);
}
double dx = max_x - min_x;
double dy = max_y - min_y;
if ((dx <= 0.0) || (dy <= 0.0))
return -1.0f;
double med_x = 0.5 * (max_x + min_x);
double med_y = 0.5 * (max_y + min_y);
dx *= margin_factor;
dy *= margin_factor;
return std::min((double)canvas_w / dx, (double)canvas_h / dy);
}
#if ENABLE_THUMBNAIL_GENERATOR
double Camera::calc_zoom_to_volumes_factor(const GLVolumePtrs& volumes, int canvas_w, int canvas_h, Vec3d& center, double margin_factor) const
{
if (volumes.empty())
return -1.0;
// project the volumes vertices on a plane perpendicular to the camera forward axis
// then calculates the vertices coordinate on this plane along the camera xy axes
// ensure that the view matrix is updated
apply_view_matrix();
Vec3d right = get_dir_right();
Vec3d up = get_dir_up();
Vec3d forward = get_dir_forward();
BoundingBoxf3 box;
for (const GLVolume* volume : volumes)
{
box.merge(volume->transformed_bounding_box());
}
center = box.center();
double min_x = DBL_MAX;
double min_y = DBL_MAX;
double max_x = -DBL_MAX;
double max_y = -DBL_MAX;
for (const GLVolume* volume : volumes)
{
const Transform3d& transform = volume->world_matrix();
const TriangleMesh* hull = volume->convex_hull();
if (hull == nullptr)
continue;
for (const Vec3f& vertex : hull->its.vertices)
{
Vec3d v = transform * vertex.cast<double>();
// project vertex on the plane perpendicular to camera forward axis
Vec3d pos = v - center;
Vec3d proj_on_plane = pos - pos.dot(forward) * forward;
// calculates vertex coordinate along camera xy axes
double x_on_plane = proj_on_plane.dot(right);
double y_on_plane = proj_on_plane.dot(up);
min_x = std::min(min_x, x_on_plane);
min_y = std::min(min_y, y_on_plane);
max_x = std::max(max_x, x_on_plane);
max_y = std::max(max_y, y_on_plane);
}
}
center += 0.5 * (max_x + min_x) * right + 0.5 * (max_y + min_y) * up;
double dx = margin_factor * (max_x - min_x);
double dy = margin_factor * (max_y - min_y);
if ((dx <= 0.0) || (dy <= 0.0))
return -1.0f;
return std::min((double)canvas_w / dx, (double)canvas_h / dy);
}
#endif // ENABLE_THUMBNAIL_GENERATOR
void Camera::set_distance(double distance) const
{
m_distance = distance;
apply_view_matrix();
}
} // GUI
} // Slic3r
|