mirror of https://github.com/axmolengine/axmol.git
318 lines
8.4 KiB
C++
318 lines
8.4 KiB
C++
/**
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* The MIT License (MIT)
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*
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* Copyright (c) 2012-2018 DragonBones team and other contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef DRAGONBONES_MATRIX_H
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#define DRAGONBONES_MATRIX_H
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#include "../core/DragonBones.h"
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#include "Point.h"
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#include "Rectangle.h"
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DRAGONBONES_NAMESPACE_BEGIN
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/**
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* - 2D Transform matrix.
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 2D 转换矩阵。
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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class Matrix
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{
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public:
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/**
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* - The value that affects the positioning of pixels along the x axis when scaling or rotating an image.
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* @default 1.0
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 缩放或旋转图像时影响像素沿 x 轴定位的值。
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* @default 1.0
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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float a;
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/**
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* - The value that affects the positioning of pixels along the y axis when rotating or skewing an image.
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* @default 0.0
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 旋转或倾斜图像时影响像素沿 y 轴定位的值。
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* @default 0.0
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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float b;
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/**
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* - The value that affects the positioning of pixels along the x axis when rotating or skewing an image.
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* @default 0.0
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 旋转或倾斜图像时影响像素沿 x 轴定位的值。
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* @default 0.0
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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float c;
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/**
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* - The value that affects the positioning of pixels along the y axis when scaling or rotating an image.
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* @default 1.0
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 缩放或旋转图像时影响像素沿 y 轴定位的值。
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* @default 1.0
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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float d;
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/**
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* - The distance by which to translate each point along the x axis.
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* @default 0.0
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 沿 x 轴平移每个点的距离。
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* @default 0.0
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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float tx;
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/**
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* - The distance by which to translate each point along the y axis.
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* @default 0.0
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 沿 y 轴平移每个点的距离。
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* @default 0.0
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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float ty;
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Matrix():
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a(1.0f),
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b(0.0f),
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c(0.0f),
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d(1.0f),
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tx(0.0f),
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ty(0.0f)
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{}
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/**
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* @private
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*/
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Matrix(const Matrix& value)
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{
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operator=(value);
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}
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~Matrix() {}
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inline void operator=(const Matrix& value)
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{
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a = value.a;
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b = value.b;
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c = value.c;
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d = value.d;
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tx = value.tx;
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ty = value.ty;
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}
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/**
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* - Convert to unit matrix.
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* The resulting matrix has the following properties: a=1, b=0, c=0, d=1, tx=0, ty=0.
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 转换为单位矩阵。
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* 该矩阵具有以下属性：a=1、b=0、c=0、d=1、tx=0、ty=0。
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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inline void identity()
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{
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a = d = 1.0f;
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b = c = 0.0f;
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tx = ty = 0.0f;
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}
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/**
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* - Multiplies the current matrix with another matrix.
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* @param value - The matrix that needs to be multiplied.
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 将当前矩阵与另一个矩阵相乘。
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* @param value - 需要相乘的矩阵。
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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inline void concat(const Matrix& value)
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{
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const auto aA = a;
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const auto bA = b;
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const auto cA = c;
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const auto dA = d;
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const auto txA = tx;
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const auto tyA = ty;
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const auto aB = value.a;
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const auto bB = value.b;
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const auto cB = value.c;
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const auto dB = value.d;
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const auto txB = value.tx;
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const auto tyB = value.ty;
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a = aA * aB + bA * cB;
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b = aA * bB + bA * dB;
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c = cA * aB + dA * cB;
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d = cA * bB + dA * dB;
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tx = aB * txA + cB * tyA + txB;
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ty = dB * tyA + bB * txA + tyB;
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}
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/**
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* - Convert to inverse matrix.
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 转换为逆矩阵。
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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inline void invert()
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{
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const auto aA = a;
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const auto bA = b;
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const auto cA = c;
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const auto dA = d;
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const auto txA = tx;
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const auto tyA = ty;
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const auto n = aA * dA - bA * cA;
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a = dA / n;
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b = -bA / n;
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c = -cA / n;
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d = aA / n;
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tx = (cA * tyA - dA * txA) / n;
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ty = -(aA * tyA - bA * txA) / n;
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}
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/**
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* - Apply a matrix transformation to a specific point.
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* @param x - X coordinate.
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* @param y - Y coordinate.
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* @param result - The point after the transformation is applied.
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* @param delta - Whether to ignore tx, ty's conversion to point.
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* @version DragonBones 3.0
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* @language en_US
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*/
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/**
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* - 将矩阵转换应用于特定点。
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* @param x - 横坐标。
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* @param y - 纵坐标。
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* @param result - 应用转换之后的点。
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* @param delta - 是否忽略 tx，ty 对点的转换。
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* @version DragonBones 3.0
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* @language zh_CN
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*/
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inline void transformPoint(float x, float y, Point& result, bool delta = false) const
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{
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result.x = a * x + c * y;
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result.y = b * x + d * y;
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if (!delta)
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{
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result.x += tx;
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result.y += ty;
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}
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}
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/**
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* @private
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*/
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inline void transformRectangle(Rectangle& rectangle, bool delta = false) const
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{
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const auto offsetX = delta ? 0.0f : this->tx;
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const auto offsetY = delta ? 0.0f : this->ty;
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const auto x = rectangle.x;
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const auto y = rectangle.y;
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const auto xMax = x + rectangle.width;
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const auto yMax = y + rectangle.height;
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auto x0 = a * x + c * y + offsetX;
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auto y0 = b * x + d * y + offsetY;
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auto x1 = a * xMax + c * y + offsetX;
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auto y1 = b * xMax + d * y + offsetY;
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auto x2 = a * xMax + c * yMax + offsetX;
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auto y2 = b * xMax + d * yMax + offsetY;
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auto x3 = a * x + c * yMax + offsetX;
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auto y3 = b * x + d * yMax + offsetY;
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auto tmp = 0.0f;
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if (x0 > x1)
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{
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tmp = x0;
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x0 = x1;
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x1 = tmp;
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}
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if (x2 > x3)
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{
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tmp = x2;
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x2 = x3;
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x3 = tmp;
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}
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rectangle.x = std::floor(x0 < x2 ? x0 : x2);
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rectangle.width = std::ceil((x1 > x3 ? x1 : x3) - rectangle.x);
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if (y0 > y1)
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{
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tmp = y0;
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y0 = y1;
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y1 = tmp;
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}
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if (y2 > y3)
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{
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tmp = y2;
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y2 = y3;
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y3 = tmp;
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}
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rectangle.y = std::floor(y0 < y2 ? y0 : y2);
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rectangle.height = std::ceil((y1 > y3 ? y1 : y3) - rectangle.y);
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}
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};
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DRAGONBONES_NAMESPACE_END
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#endif // DRAGONBONES_MATRIX_H
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