b411a731fe
A common source of errors is to call functions (such as round()) expecting them to work in place, but them actually being designed only to return the processed value. Not using the return value in this case in indicative of a bug, and can be flagged as a warning by using the [[nodiscard]] attribute.
395 lines
12 KiB
C++
395 lines
12 KiB
C++
/*************************************************************************/
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/* vector2.h */
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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) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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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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#ifndef VECTOR2_H
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#define VECTOR2_H
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#include "core/math/math_funcs.h"
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#include "core/string/ustring.h"
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struct Vector2i;
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struct _NO_DISCARD_ Vector2 {
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static const int AXIS_COUNT = 2;
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enum Axis {
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AXIS_X,
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AXIS_Y,
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};
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union {
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struct {
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union {
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real_t x;
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real_t width;
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};
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union {
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real_t y;
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real_t height;
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};
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};
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real_t coord[2] = { 0 };
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};
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_FORCE_INLINE_ real_t &operator[](int p_idx) {
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return p_idx ? y : x;
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}
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_FORCE_INLINE_ const real_t &operator[](int p_idx) const {
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return p_idx ? y : x;
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}
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_FORCE_INLINE_ void set_all(const real_t p_value) {
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x = y = p_value;
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}
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_FORCE_INLINE_ Vector2::Axis min_axis_index() const {
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return x < y ? Vector2::AXIS_X : Vector2::AXIS_Y;
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}
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_FORCE_INLINE_ Vector2::Axis max_axis_index() const {
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return x < y ? Vector2::AXIS_Y : Vector2::AXIS_X;
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}
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void normalize();
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Vector2 normalized() const;
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bool is_normalized() const;
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real_t length() const;
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real_t length_squared() const;
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Vector2 limit_length(const real_t p_len = 1.0) const;
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Vector2 min(const Vector2 &p_vector2) const {
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return Vector2(MIN(x, p_vector2.x), MIN(y, p_vector2.y));
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}
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Vector2 max(const Vector2 &p_vector2) const {
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return Vector2(MAX(x, p_vector2.x), MAX(y, p_vector2.y));
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}
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real_t distance_to(const Vector2 &p_vector2) const;
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real_t distance_squared_to(const Vector2 &p_vector2) const;
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real_t angle_to(const Vector2 &p_vector2) const;
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real_t angle_to_point(const Vector2 &p_vector2) const;
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_FORCE_INLINE_ Vector2 direction_to(const Vector2 &p_to) const;
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real_t dot(const Vector2 &p_other) const;
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real_t cross(const Vector2 &p_other) const;
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Vector2 posmod(const real_t p_mod) const;
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Vector2 posmodv(const Vector2 &p_modv) const;
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Vector2 project(const Vector2 &p_to) const;
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Vector2 plane_project(const real_t p_d, const Vector2 &p_vec) const;
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_FORCE_INLINE_ Vector2 lerp(const Vector2 &p_to, const real_t p_weight) const;
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_FORCE_INLINE_ Vector2 slerp(const Vector2 &p_to, const real_t p_weight) const;
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Vector2 cubic_interpolate(const Vector2 &p_b, const Vector2 &p_pre_a, const Vector2 &p_post_b, const real_t p_weight) const;
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Vector2 move_toward(const Vector2 &p_to, const real_t p_delta) const;
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Vector2 slide(const Vector2 &p_normal) const;
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Vector2 bounce(const Vector2 &p_normal) const;
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Vector2 reflect(const Vector2 &p_normal) const;
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bool is_equal_approx(const Vector2 &p_v) const;
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Vector2 operator+(const Vector2 &p_v) const;
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void operator+=(const Vector2 &p_v);
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Vector2 operator-(const Vector2 &p_v) const;
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void operator-=(const Vector2 &p_v);
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Vector2 operator*(const Vector2 &p_v1) const;
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Vector2 operator*(const real_t &rvalue) const;
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void operator*=(const real_t &rvalue);
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void operator*=(const Vector2 &rvalue) { *this = *this * rvalue; }
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Vector2 operator/(const Vector2 &p_v1) const;
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Vector2 operator/(const real_t &rvalue) const;
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void operator/=(const real_t &rvalue);
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void operator/=(const Vector2 &rvalue) { *this = *this / rvalue; }
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Vector2 operator-() const;
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bool operator==(const Vector2 &p_vec2) const;
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bool operator!=(const Vector2 &p_vec2) const;
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bool operator<(const Vector2 &p_vec2) const { return x == p_vec2.x ? (y < p_vec2.y) : (x < p_vec2.x); }
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bool operator>(const Vector2 &p_vec2) const { return x == p_vec2.x ? (y > p_vec2.y) : (x > p_vec2.x); }
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bool operator<=(const Vector2 &p_vec2) const { return x == p_vec2.x ? (y <= p_vec2.y) : (x < p_vec2.x); }
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bool operator>=(const Vector2 &p_vec2) const { return x == p_vec2.x ? (y >= p_vec2.y) : (x > p_vec2.x); }
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real_t angle() const;
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static Vector2 from_angle(const real_t p_angle);
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_FORCE_INLINE_ Vector2 abs() const {
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return Vector2(Math::abs(x), Math::abs(y));
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}
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Vector2 rotated(const real_t p_by) const;
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Vector2 orthogonal() const {
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return Vector2(y, -x);
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}
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Vector2 sign() const;
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Vector2 floor() const;
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Vector2 ceil() const;
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Vector2 round() const;
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Vector2 snapped(const Vector2 &p_by) const;
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Vector2 clamp(const Vector2 &p_min, const Vector2 &p_max) const;
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real_t aspect() const { return width / height; }
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operator String() const;
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_FORCE_INLINE_ Vector2() {}
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_FORCE_INLINE_ Vector2(const real_t p_x, const real_t p_y) {
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x = p_x;
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y = p_y;
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}
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};
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_FORCE_INLINE_ Vector2 Vector2::plane_project(const real_t p_d, const Vector2 &p_vec) const {
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return p_vec - *this * (dot(p_vec) - p_d);
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}
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_FORCE_INLINE_ Vector2 operator*(const float p_scalar, const Vector2 &p_vec) {
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return p_vec * p_scalar;
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}
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_FORCE_INLINE_ Vector2 operator*(const double p_scalar, const Vector2 &p_vec) {
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return p_vec * p_scalar;
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}
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_FORCE_INLINE_ Vector2 operator*(const int32_t p_scalar, const Vector2 &p_vec) {
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return p_vec * p_scalar;
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}
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_FORCE_INLINE_ Vector2 operator*(const int64_t p_scalar, const Vector2 &p_vec) {
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return p_vec * p_scalar;
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}
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_FORCE_INLINE_ Vector2 Vector2::operator+(const Vector2 &p_v) const {
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return Vector2(x + p_v.x, y + p_v.y);
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}
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_FORCE_INLINE_ void Vector2::operator+=(const Vector2 &p_v) {
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x += p_v.x;
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y += p_v.y;
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}
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_FORCE_INLINE_ Vector2 Vector2::operator-(const Vector2 &p_v) const {
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return Vector2(x - p_v.x, y - p_v.y);
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}
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_FORCE_INLINE_ void Vector2::operator-=(const Vector2 &p_v) {
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x -= p_v.x;
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y -= p_v.y;
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}
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_FORCE_INLINE_ Vector2 Vector2::operator*(const Vector2 &p_v1) const {
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return Vector2(x * p_v1.x, y * p_v1.y);
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}
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_FORCE_INLINE_ Vector2 Vector2::operator*(const real_t &rvalue) const {
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return Vector2(x * rvalue, y * rvalue);
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}
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_FORCE_INLINE_ void Vector2::operator*=(const real_t &rvalue) {
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x *= rvalue;
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y *= rvalue;
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}
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_FORCE_INLINE_ Vector2 Vector2::operator/(const Vector2 &p_v1) const {
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return Vector2(x / p_v1.x, y / p_v1.y);
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}
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_FORCE_INLINE_ Vector2 Vector2::operator/(const real_t &rvalue) const {
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return Vector2(x / rvalue, y / rvalue);
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}
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_FORCE_INLINE_ void Vector2::operator/=(const real_t &rvalue) {
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x /= rvalue;
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y /= rvalue;
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}
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_FORCE_INLINE_ Vector2 Vector2::operator-() const {
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return Vector2(-x, -y);
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}
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_FORCE_INLINE_ bool Vector2::operator==(const Vector2 &p_vec2) const {
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return x == p_vec2.x && y == p_vec2.y;
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}
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_FORCE_INLINE_ bool Vector2::operator!=(const Vector2 &p_vec2) const {
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return x != p_vec2.x || y != p_vec2.y;
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}
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Vector2 Vector2::lerp(const Vector2 &p_to, const real_t p_weight) const {
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Vector2 res = *this;
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res.x += (p_weight * (p_to.x - x));
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res.y += (p_weight * (p_to.y - y));
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return res;
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}
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Vector2 Vector2::slerp(const Vector2 &p_to, const real_t p_weight) const {
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real_t start_length_sq = length_squared();
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real_t end_length_sq = p_to.length_squared();
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if (unlikely(start_length_sq == 0.0 || end_length_sq == 0.0)) {
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// Zero length vectors have no angle, so the best we can do is either lerp or throw an error.
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return lerp(p_to, p_weight);
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}
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real_t start_length = Math::sqrt(start_length_sq);
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real_t result_length = Math::lerp(start_length, Math::sqrt(end_length_sq), p_weight);
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real_t angle = angle_to(p_to);
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return rotated(angle * p_weight) * (result_length / start_length);
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}
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Vector2 Vector2::direction_to(const Vector2 &p_to) const {
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Vector2 ret(p_to.x - x, p_to.y - y);
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ret.normalize();
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return ret;
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}
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typedef Vector2 Size2;
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typedef Vector2 Point2;
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/* INTEGER STUFF */
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struct _NO_DISCARD_ Vector2i {
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enum Axis {
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AXIS_X,
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AXIS_Y,
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};
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union {
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int32_t x = 0;
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int32_t width;
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};
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union {
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int32_t y = 0;
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int32_t height;
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};
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_FORCE_INLINE_ int32_t &operator[](int p_idx) {
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return p_idx ? y : x;
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}
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_FORCE_INLINE_ const int32_t &operator[](int p_idx) const {
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return p_idx ? y : x;
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}
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_FORCE_INLINE_ Vector2i::Axis min_axis_index() const {
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return x < y ? Vector2i::AXIS_X : Vector2i::AXIS_Y;
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}
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_FORCE_INLINE_ Vector2i::Axis max_axis_index() const {
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return x < y ? Vector2i::AXIS_Y : Vector2i::AXIS_X;
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}
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Vector2i min(const Vector2i &p_vector2i) const {
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return Vector2(MIN(x, p_vector2i.x), MIN(y, p_vector2i.y));
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}
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Vector2i max(const Vector2i &p_vector2i) const {
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return Vector2(MAX(x, p_vector2i.x), MAX(y, p_vector2i.y));
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}
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Vector2i operator+(const Vector2i &p_v) const;
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void operator+=(const Vector2i &p_v);
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Vector2i operator-(const Vector2i &p_v) const;
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void operator-=(const Vector2i &p_v);
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Vector2i operator*(const Vector2i &p_v1) const;
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Vector2i operator*(const int32_t &rvalue) const;
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void operator*=(const int32_t &rvalue);
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Vector2i operator/(const Vector2i &p_v1) const;
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Vector2i operator/(const int32_t &rvalue) const;
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void operator/=(const int32_t &rvalue);
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Vector2i operator%(const Vector2i &p_v1) const;
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Vector2i operator%(const int32_t &rvalue) const;
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void operator%=(const int32_t &rvalue);
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Vector2i operator-() const;
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bool operator<(const Vector2i &p_vec2) const { return (x == p_vec2.x) ? (y < p_vec2.y) : (x < p_vec2.x); }
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bool operator>(const Vector2i &p_vec2) const { return (x == p_vec2.x) ? (y > p_vec2.y) : (x > p_vec2.x); }
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bool operator<=(const Vector2i &p_vec2) const { return x == p_vec2.x ? (y <= p_vec2.y) : (x < p_vec2.x); }
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bool operator>=(const Vector2i &p_vec2) const { return x == p_vec2.x ? (y >= p_vec2.y) : (x > p_vec2.x); }
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bool operator==(const Vector2i &p_vec2) const;
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bool operator!=(const Vector2i &p_vec2) const;
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int64_t length_squared() const;
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double length() const;
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real_t aspect() const { return width / (real_t)height; }
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Vector2i sign() const { return Vector2i(SIGN(x), SIGN(y)); }
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Vector2i abs() const { return Vector2i(ABS(x), ABS(y)); }
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Vector2i clamp(const Vector2i &p_min, const Vector2i &p_max) const;
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operator String() const;
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operator Vector2() const { return Vector2(x, y); }
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inline Vector2i() {}
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inline Vector2i(const Vector2 &p_vec2) {
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x = (int32_t)p_vec2.x;
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y = (int32_t)p_vec2.y;
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}
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inline Vector2i(const int32_t p_x, const int32_t p_y) {
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x = p_x;
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y = p_y;
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}
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};
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_FORCE_INLINE_ Vector2i operator*(const int32_t &p_scalar, const Vector2i &p_vector) {
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return p_vector * p_scalar;
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}
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_FORCE_INLINE_ Vector2i operator*(const int64_t &p_scalar, const Vector2i &p_vector) {
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return p_vector * p_scalar;
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}
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_FORCE_INLINE_ Vector2i operator*(const float &p_scalar, const Vector2i &p_vector) {
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return p_vector * p_scalar;
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}
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_FORCE_INLINE_ Vector2i operator*(const double &p_scalar, const Vector2i &p_vector) {
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return p_vector * p_scalar;
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}
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typedef Vector2i Size2i;
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typedef Vector2i Point2i;
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#endif // VECTOR2_H
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