godot/editor/plugins/gizmos/collision_polygon_3d_gizmo_plugin.cpp

/**************************************************************************/
/*  collision_polygon_3d_gizmo_plugin.cpp                                 */
/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#include "collision_polygon_3d_gizmo_plugin.h"

#include "editor/editor_settings.h"
#include "editor/plugins/node_3d_editor_plugin.h"
#include "scene/3d/physics/collision_polygon_3d.h"

CollisionPolygon3DGizmoPlugin::CollisionPolygon3DGizmoPlugin() {
	const Color gizmo_color = SceneTree::get_singleton()->get_debug_collisions_color();
	create_material("shape_material", gizmo_color);
	const float gizmo_value = gizmo_color.get_v();
	const Color gizmo_color_disabled = Color(gizmo_value, gizmo_value, gizmo_value, 0.65);
	create_material("shape_material_disabled", gizmo_color_disabled);
}

bool CollisionPolygon3DGizmoPlugin::has_gizmo(Node3D *p_spatial) {
	return Object::cast_to<CollisionPolygon3D>(p_spatial) != nullptr;
}

String CollisionPolygon3DGizmoPlugin::get_gizmo_name() const {
	return "CollisionPolygon3D";
}

int CollisionPolygon3DGizmoPlugin::get_priority() const {
	return -1;
}

void CollisionPolygon3DGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
	CollisionPolygon3D *polygon = Object::cast_to<CollisionPolygon3D>(p_gizmo->get_node_3d());

	p_gizmo->clear();

	Vector<Vector2> points = polygon->get_polygon();
	float depth = polygon->get_depth() * 0.5;

	Vector<Vector3> lines;
	for (int i = 0; i < points.size(); i++) {
		int n = (i + 1) % points.size();
		lines.push_back(Vector3(points[i].x, points[i].y, depth));
		lines.push_back(Vector3(points[n].x, points[n].y, depth));
		lines.push_back(Vector3(points[i].x, points[i].y, -depth));
		lines.push_back(Vector3(points[n].x, points[n].y, -depth));
		lines.push_back(Vector3(points[i].x, points[i].y, depth));
		lines.push_back(Vector3(points[i].x, points[i].y, -depth));
	}

	const Ref<Material> material =
			get_material(!polygon->is_disabled() ? "shape_material" : "shape_material_disabled", p_gizmo);

	p_gizmo->add_lines(lines, material);
	p_gizmo->add_collision_segments(lines);
}