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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_GEOMETRY_BOX_F_H_
#define UI_GFX_GEOMETRY_BOX_F_H_
#include <iosfwd>
#include <string>
#include "base/component_export.h"
#include "ui/gfx/geometry/point3_f.h"
#include "ui/gfx/geometry/vector3d_f.h"
namespace gfx {
// A 3d version of gfx::RectF, with the positive z-axis pointed towards
// the camera.
class COMPONENT_EXPORT(GEOMETRY) BoxF {
public:
constexpr BoxF() : BoxF(0, 0, 0) {}
constexpr BoxF(float width, float height, float depth)
: BoxF(0, 0, 0, width, height, depth) {}
constexpr BoxF(float x,
float y,
float z,
float width,
float height,
float depth)
: BoxF(Point3F(x, y, z), width, height, depth) {}
constexpr BoxF(const Point3F& origin, float width, float height, float depth)
: origin_(origin),
width_(width >= 0 ? width : 0),
height_(height >= 0 ? height : 0),
depth_(depth >= 0 ? depth : 0) {}
// Scales all three axes by the given scale.
void Scale(float scale) {
Scale(scale, scale, scale);
}
// Scales each axis by the corresponding given scale.
void Scale(float x_scale, float y_scale, float z_scale) {
origin_.Scale(x_scale, y_scale, z_scale);
set_size(width_ * x_scale, height_ * y_scale, depth_ * z_scale);
}
// Moves the box by the specified distance in each dimension.
void operator+=(const Vector3dF& offset) {
origin_ += offset;
}
// Returns true if the box has no interior points.
bool IsEmpty() const;
// Computes the union of this box with the given box. The union is the
// smallest box that contains both boxes.
void Union(const BoxF& box);
std::string ToString() const;
constexpr float x() const { return origin_.x(); }
void set_x(float x) { origin_.set_x(x); }
constexpr float y() const { return origin_.y(); }
void set_y(float y) { origin_.set_y(y); }
constexpr float z() const { return origin_.z(); }
void set_z(float z) { origin_.set_z(z); }
constexpr float width() const { return width_; }
void set_width(float width) { width_ = width < 0 ? 0 : width; }
constexpr float height() const { return height_; }
void set_height(float height) { height_ = height < 0 ? 0 : height; }
constexpr float depth() const { return depth_; }
void set_depth(float depth) { depth_ = depth < 0 ? 0 : depth; }
constexpr float right() const { return x() + width(); }
constexpr float bottom() const { return y() + height(); }
constexpr float front() const { return z() + depth(); }
void set_size(float width, float height, float depth) {
width_ = width < 0 ? 0 : width;
height_ = height < 0 ? 0 : height;
depth_ = depth < 0 ? 0 : depth;
}
constexpr const Point3F& origin() const { return origin_; }
void set_origin(const Point3F& origin) { origin_ = origin; }
// Expands |this| to contain the given point, if necessary. Please note, even
// if |this| is empty, after the function |this| will continue to contain its
// |origin_|.
void ExpandTo(const Point3F& point);
// Expands |this| to contain the given box, if necessary. Please note, even
// if |this| is empty, after the function |this| will continue to contain its
// |origin_|.
void ExpandTo(const BoxF& box);
friend bool operator==(const BoxF&, const BoxF&) = default;
private:
// Expands the box to contain the two given points. It is required that each
// component of |min| is less than or equal to the corresponding component in
// |max|. Precisely, what this function does is ensure that after the function
// completes, |this| contains origin_, min, max, and origin_ + (width_,
// height_, depth_), even if the box is empty. Emptiness checks are handled in
// the public function Union.
void ExpandTo(const Point3F& min, const Point3F& max);
Point3F origin_;
float width_;
float height_;
float depth_;
};
COMPONENT_EXPORT(GEOMETRY) BoxF UnionBoxes(const BoxF& a, const BoxF& b);
inline BoxF ScaleBox(const BoxF& b,
float x_scale,
float y_scale,
float z_scale) {
return BoxF(b.x() * x_scale,
b.y() * y_scale,
b.z() * z_scale,
b.width() * x_scale,
b.height() * y_scale,
b.depth() * z_scale);
}
inline BoxF ScaleBox(const BoxF& b, float scale) {
return ScaleBox(b, scale, scale, scale);
}
inline BoxF operator+(const BoxF& b, const Vector3dF& v) {
return BoxF(b.x() + v.x(),
b.y() + v.y(),
b.z() + v.z(),
b.width(),
b.height(),
b.depth());
}
// This is declared here for use in gtest-based unit tests but is defined in
// the //ui/gfx:test_support target. Depend on that to use this in your unit
// test. This should not be used in production code - call ToString() instead.
void PrintTo(const BoxF& box, ::std::ostream* os);
} // namespace gfx
#endif // UI_GFX_GEOMETRY_BOX_F_H_
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