295 lines
11 KiB
C++
295 lines
11 KiB
C++
/**************************************************************************/
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/* camera_3d_gizmo_plugin.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "camera_3d_gizmo_plugin.h"
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#include "core/config/project_settings.h"
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#include "editor/editor_node.h"
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#include "editor/editor_settings.h"
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#include "editor/editor_undo_redo_manager.h"
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#include "editor/plugins/node_3d_editor_plugin.h"
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#include "scene/3d/camera_3d.h"
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Camera3DGizmoPlugin::Camera3DGizmoPlugin() {
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Color gizmo_color = EDITOR_DEF("editors/3d_gizmos/gizmo_colors/camera", Color(0.8, 0.4, 0.8));
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create_material("camera_material", gizmo_color);
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create_icon_material("camera_icon", Node3DEditor::get_singleton()->get_editor_theme_icon("GizmoCamera3D"));
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create_handle_material("handles");
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}
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Size2i Camera3DGizmoPlugin::_get_viewport_size(Camera3D *p_camera) {
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Viewport *viewport = p_camera->get_viewport();
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Window *window = Object::cast_to<Window>(viewport);
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if (window) {
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return window->get_size();
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}
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SubViewport *sub_viewport = Object::cast_to<SubViewport>(viewport);
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ERR_FAIL_NULL_V(sub_viewport, Size2i());
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if (sub_viewport == EditorNode::get_singleton()->get_scene_root()) {
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return Size2(GLOBAL_GET("display/window/size/viewport_width"), GLOBAL_GET("display/window/size/viewport_height"));
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}
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return sub_viewport->get_size();
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}
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bool Camera3DGizmoPlugin::has_gizmo(Node3D *p_spatial) {
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return Object::cast_to<Camera3D>(p_spatial) != nullptr;
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}
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String Camera3DGizmoPlugin::get_gizmo_name() const {
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return "Camera3D";
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}
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int Camera3DGizmoPlugin::get_priority() const {
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return -1;
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}
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String Camera3DGizmoPlugin::get_handle_name(const EditorNode3DGizmo *p_gizmo, int p_id, bool p_secondary) const {
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Camera3D *camera = Object::cast_to<Camera3D>(p_gizmo->get_node_3d());
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if (camera->get_projection() == Camera3D::PROJECTION_PERSPECTIVE) {
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return "FOV";
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} else {
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return "Size";
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}
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}
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Variant Camera3DGizmoPlugin::get_handle_value(const EditorNode3DGizmo *p_gizmo, int p_id, bool p_secondary) const {
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Camera3D *camera = Object::cast_to<Camera3D>(p_gizmo->get_node_3d());
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if (camera->get_projection() == Camera3D::PROJECTION_PERSPECTIVE) {
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return camera->get_fov();
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} else {
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return camera->get_size();
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}
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}
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void Camera3DGizmoPlugin::set_handle(const EditorNode3DGizmo *p_gizmo, int p_id, bool p_secondary, Camera3D *p_camera, const Point2 &p_point) {
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Camera3D *camera = Object::cast_to<Camera3D>(p_gizmo->get_node_3d());
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Transform3D gt = camera->get_global_transform();
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Transform3D gi = gt.affine_inverse();
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Vector3 ray_from = p_camera->project_ray_origin(p_point);
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Vector3 ray_dir = p_camera->project_ray_normal(p_point);
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Vector3 s[2] = { gi.xform(ray_from), gi.xform(ray_from + ray_dir * 4096) };
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if (camera->get_projection() == Camera3D::PROJECTION_PERSPECTIVE) {
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Transform3D gt2 = camera->get_global_transform();
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float a = _find_closest_angle_to_half_pi_arc(s[0], s[1], 1.0, gt2);
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camera->set("fov", CLAMP(a * 2.0, 1, 179));
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} else {
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Vector3 ra, rb;
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Geometry3D::get_closest_points_between_segments(Vector3(0, 0, -1), Vector3(4096, 0, -1), s[0], s[1], ra, rb);
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float d = ra.x * 2;
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if (Node3DEditor::get_singleton()->is_snap_enabled()) {
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d = Math::snapped(d, Node3DEditor::get_singleton()->get_translate_snap());
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}
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d = CLAMP(d, 0.1, 16384);
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camera->set("size", d);
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}
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}
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void Camera3DGizmoPlugin::commit_handle(const EditorNode3DGizmo *p_gizmo, int p_id, bool p_secondary, const Variant &p_restore, bool p_cancel) {
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Camera3D *camera = Object::cast_to<Camera3D>(p_gizmo->get_node_3d());
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if (camera->get_projection() == Camera3D::PROJECTION_PERSPECTIVE) {
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if (p_cancel) {
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camera->set("fov", p_restore);
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} else {
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EditorUndoRedoManager *ur = EditorUndoRedoManager::get_singleton();
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ur->create_action(TTR("Change Camera FOV"));
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ur->add_do_property(camera, "fov", camera->get_fov());
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ur->add_undo_property(camera, "fov", p_restore);
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ur->commit_action();
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}
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} else {
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if (p_cancel) {
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camera->set("size", p_restore);
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} else {
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EditorUndoRedoManager *ur = EditorUndoRedoManager::get_singleton();
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ur->create_action(TTR("Change Camera Size"));
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ur->add_do_property(camera, "size", camera->get_size());
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ur->add_undo_property(camera, "size", p_restore);
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ur->commit_action();
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}
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}
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}
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void Camera3DGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
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Camera3D *camera = Object::cast_to<Camera3D>(p_gizmo->get_node_3d());
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p_gizmo->clear();
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Vector<Vector3> lines;
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Vector<Vector3> handles;
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Ref<Material> material = get_material("camera_material", p_gizmo);
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Ref<Material> icon = get_material("camera_icon", p_gizmo);
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const Size2i viewport_size = _get_viewport_size(camera);
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const real_t viewport_aspect = viewport_size.x > 0 && viewport_size.y > 0 ? viewport_size.aspect() : 1.0;
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const Size2 size_factor = viewport_aspect > 1.0 ? Size2(1.0, 1.0 / viewport_aspect) : Size2(viewport_aspect, 1.0);
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#define ADD_TRIANGLE(m_a, m_b, m_c) \
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{ \
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lines.push_back(m_a); \
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lines.push_back(m_b); \
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lines.push_back(m_b); \
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lines.push_back(m_c); \
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lines.push_back(m_c); \
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lines.push_back(m_a); \
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}
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#define ADD_QUAD(m_a, m_b, m_c, m_d) \
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{ \
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lines.push_back(m_a); \
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lines.push_back(m_b); \
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lines.push_back(m_b); \
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lines.push_back(m_c); \
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lines.push_back(m_c); \
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lines.push_back(m_d); \
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lines.push_back(m_d); \
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lines.push_back(m_a); \
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}
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switch (camera->get_projection()) {
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case Camera3D::PROJECTION_PERSPECTIVE: {
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// The real FOV is halved for accurate representation
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float fov = camera->get_fov() / 2.0;
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const float hsize = Math::sin(Math::deg_to_rad(fov));
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const float depth = -Math::cos(Math::deg_to_rad(fov));
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Vector3 side = Vector3(hsize * size_factor.x, 0, depth);
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Vector3 nside = Vector3(-side.x, side.y, side.z);
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Vector3 up = Vector3(0, hsize * size_factor.y, 0);
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ADD_TRIANGLE(Vector3(), side + up, side - up);
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ADD_TRIANGLE(Vector3(), nside + up, nside - up);
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ADD_TRIANGLE(Vector3(), side + up, nside + up);
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ADD_TRIANGLE(Vector3(), side - up, nside - up);
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handles.push_back(side);
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side.x = MIN(side.x, hsize * 0.25);
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nside.x = -side.x;
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Vector3 tup(0, up.y + hsize / 2, side.z);
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ADD_TRIANGLE(tup, side + up, nside + up);
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} break;
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case Camera3D::PROJECTION_ORTHOGONAL: {
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float size = camera->get_size();
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float hsize = size * 0.5;
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Vector3 right(hsize * size_factor.x, 0, 0);
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Vector3 up(0, hsize * size_factor.y, 0);
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Vector3 back(0, 0, -1.0);
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Vector3 front(0, 0, 0);
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ADD_QUAD(-up - right, -up + right, up + right, up - right);
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ADD_QUAD(-up - right + back, -up + right + back, up + right + back, up - right + back);
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ADD_QUAD(up + right, up + right + back, up - right + back, up - right);
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ADD_QUAD(-up + right, -up + right + back, -up - right + back, -up - right);
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handles.push_back(right + back);
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right.x = MIN(right.x, hsize * 0.25);
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Vector3 tup(0, up.y + hsize / 2, back.z);
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ADD_TRIANGLE(tup, right + up + back, -right + up + back);
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} break;
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case Camera3D::PROJECTION_FRUSTUM: {
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float hsize = camera->get_size() / 2.0;
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Vector3 side = Vector3(hsize, 0, -camera->get_near()).normalized();
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side.x *= size_factor.x;
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Vector3 nside = Vector3(-side.x, side.y, side.z);
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Vector3 up = Vector3(0, hsize * size_factor.y, 0);
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Vector3 offset = Vector3(camera->get_frustum_offset().x, camera->get_frustum_offset().y, 0.0);
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ADD_TRIANGLE(Vector3(), side + up + offset, side - up + offset);
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ADD_TRIANGLE(Vector3(), nside + up + offset, nside - up + offset);
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ADD_TRIANGLE(Vector3(), side + up + offset, nside + up + offset);
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ADD_TRIANGLE(Vector3(), side - up + offset, nside - up + offset);
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side.x = MIN(side.x, hsize * 0.25);
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nside.x = -side.x;
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Vector3 tup(0, up.y + hsize / 2, side.z);
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ADD_TRIANGLE(tup + offset, side + up + offset, nside + up + offset);
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} break;
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}
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#undef ADD_TRIANGLE
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#undef ADD_QUAD
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p_gizmo->add_lines(lines, material);
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p_gizmo->add_unscaled_billboard(icon, 0.05);
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p_gizmo->add_collision_segments(lines);
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if (!handles.is_empty()) {
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p_gizmo->add_handles(handles, get_material("handles"));
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}
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}
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float Camera3DGizmoPlugin::_find_closest_angle_to_half_pi_arc(const Vector3 &p_from, const Vector3 &p_to, float p_arc_radius, const Transform3D &p_arc_xform) {
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//bleh, discrete is simpler
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static const int arc_test_points = 64;
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float min_d = 1e20;
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Vector3 min_p;
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for (int i = 0; i < arc_test_points; i++) {
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float a = i * Math_PI * 0.5 / arc_test_points;
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float an = (i + 1) * Math_PI * 0.5 / arc_test_points;
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Vector3 p = Vector3(Math::cos(a), 0, -Math::sin(a)) * p_arc_radius;
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Vector3 n = Vector3(Math::cos(an), 0, -Math::sin(an)) * p_arc_radius;
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Vector3 ra, rb;
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Geometry3D::get_closest_points_between_segments(p, n, p_from, p_to, ra, rb);
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float d = ra.distance_to(rb);
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if (d < min_d) {
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min_d = d;
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min_p = ra;
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}
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}
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//min_p = p_arc_xform.affine_inverse().xform(min_p);
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float a = (Math_PI * 0.5) - Vector2(min_p.x, -min_p.z).angle();
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return Math::rad_to_deg(a);
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}
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