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/*
Copyright 2017 Martin Buck
This file is part of rust-3d.
rust-3d is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
rust-3d is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with rust-3d. If not, see <http://www.gnu.org/licenses/>.
*/
//! Matrix3, a matrix with 3 rows and columns
use std::ops::Mul;
use prelude::*;
#[derive (Debug, PartialEq, PartialOrd, Clone)]
/// Matrix3, a matrix with 3 rows and columns
pub struct Matrix3 {
pub data: [[f64; 3]; 3]
}
impl Matrix3 {
/// Creates a new matrix which contains only zeroes
pub fn zeroes() -> Matrix3 {
Matrix3{
data: [
[0.0, 0.0, 0.0],
[0.0, 0.0, 0.0],
[0.0, 0.0, 0.0]
]
}
}
/// Creates a new matrix which applies translation
pub fn translation(x: f64, y: f64) -> Matrix3 {
Matrix3{
data: [
[1.0, 0.0, x],
[0.0, 1.0, y],
[0.0, 0.0, 1.0]
]
}
}
/// Creates a new matrix which applies scaling
pub fn scale(x: f64, y: f64) -> Matrix3 {
Matrix3{
data: [
[x, 0.0, 0.0],
[0.0, y, 0.0],
[0.0, 0.0, 1.0]
]
}
}
/// Creates a new matrix which applies rotation
pub fn rotation(rad: Rad) -> Matrix3 {
Matrix3{
data: [
[rad.val.cos(), -rad.val.sin(), 0.0],
[rad.val.sin(), rad.val.cos(), 0.0],
[0.0, 0.0, 1.0]
]
}
}
}
impl Default for Matrix3 {
fn default() -> Self {
Matrix3{
data: [
[1.0, 0.0, 0.0],
[0.0, 1.0, 0.0],
[0.0, 0.0, 1.0],
]
}
}
}
impl Mul for Matrix3 {
type Output = Self;
fn mul(self, other: Self) -> Self {
let mut result = Matrix3::default();
for i in 0..3 {
for j in 0..3 {
result.data[i][j] =
self.data[i][0] * other.data[0][j] +
self.data[i][1] * other.data[1][j] +
self.data[i][2] * other.data[2][j];
}
}
result
}
}
impl Mul<f64> for Matrix3 {
type Output = Self;
fn mul(self, other: f64) -> Self {
let mut result = Matrix3::default();
for i in 0..3 {
for j in 0..3 {
result.data[i][j] = other * self.data[i][j];
}
}
result
}
}