2012-11-15 02:23:39 +00:00
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use core::cast::transmute;
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2012-11-22 01:09:04 +00:00
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use core::cmp::{Eq, Ord};
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2012-11-15 02:23:39 +00:00
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use core::ptr::to_unsafe_ptr;
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2012-11-25 12:05:47 +00:00
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use core::sys::size_of;
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2012-11-15 02:23:39 +00:00
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use core::vec::raw::buf_as_slice;
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use std::cmp::FuzzyEq;
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2012-12-01 04:55:45 +00:00
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use dim::{Dimensional, ToPtr};
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2012-11-26 06:48:46 +00:00
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use funs::common::*;
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use funs::exponential::*;
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2012-11-15 02:23:39 +00:00
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use num::cast::*;
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2012-11-20 05:35:06 +00:00
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use num::default_eq::DefaultEq;
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2012-11-15 02:23:39 +00:00
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use quat::{Quat, ToQuat};
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2012-11-20 06:57:32 +00:00
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use vec::{NumericVector, Vec2, Vec3, Vec4};
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2012-11-15 02:23:39 +00:00
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2012-12-02 22:15:40 +00:00
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/**
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* An N x N Matrix
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*/
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pub trait Matrix<T,V>: Dimensional<V>, ToPtr<T>, Eq, DefaultEq, Neg<self> {
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pure fn col(&self, i: uint) -> V;
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pure fn row(&self, i: uint) -> V;
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static pure fn identity() -> self;
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2012-11-20 06:57:32 +00:00
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static pure fn zero() -> self;
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2012-11-30 03:13:20 +00:00
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pure fn mul_t(&self, value: T) -> self;
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2012-12-02 22:15:40 +00:00
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pure fn mul_v(&self, other: &V) -> V;
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2012-11-30 03:13:20 +00:00
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pure fn add_m(&self, other: &self) -> self;
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pure fn sub_m(&self, other: &self) -> self;
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2012-11-28 22:49:31 +00:00
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2012-11-30 03:13:20 +00:00
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pure fn mul_m(&self, other: &self) -> self;
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pure fn dot(&self, other: &self) -> T;
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2012-11-15 02:23:39 +00:00
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2012-12-03 01:08:36 +00:00
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pure fn determinant(&self) -> T;
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2012-11-30 03:13:20 +00:00
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pure fn trace(&self) -> T;
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2012-11-15 02:23:39 +00:00
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2012-11-30 03:13:20 +00:00
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pure fn invert(&self) -> Option<self>;
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pure fn transpose(&self) -> self;
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2012-11-15 02:23:39 +00:00
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2012-11-30 03:13:20 +00:00
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pure fn is_identity(&self) -> bool;
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pure fn is_diagonal(&self) -> bool;
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pure fn is_rotated(&self) -> bool;
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2012-12-02 22:15:40 +00:00
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pure fn is_symmetric(&self) -> bool;
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2012-11-30 03:13:20 +00:00
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pure fn is_invertible(&self) -> bool;
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2012-11-15 02:23:39 +00:00
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}
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2012-11-20 11:37:10 +00:00
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/// A 2 x 2 square matrix with numeric elements
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2012-12-02 22:15:40 +00:00
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pub trait Matrix2<T,V>: Matrix<T,V> {
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2012-11-30 03:13:20 +00:00
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pure fn to_mat3(&self) -> Mat3<T>;
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pure fn to_mat4(&self) -> Mat4<T>;
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2012-11-15 02:23:39 +00:00
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}
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2012-11-20 11:37:10 +00:00
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/// A 3 x 3 square matrix with numeric elements
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2012-12-02 22:15:40 +00:00
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pub trait Matrix3<T,V>: Matrix<T,V> {
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2012-11-30 03:13:20 +00:00
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pure fn to_mat4(&self) -> Mat4<T>;
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2012-11-15 02:23:39 +00:00
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}
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2012-11-20 11:37:10 +00:00
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/// A 4 x 4 square matrix with numeric elements
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2012-12-02 22:15:40 +00:00
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pub trait Matrix4<T,V>: Matrix<T,V> {
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2012-11-15 02:23:39 +00:00
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}
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2012-12-02 22:15:40 +00:00
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/**
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* A 2 x 2 column major matrix
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*/
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2012-11-15 02:23:39 +00:00
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pub struct Mat2<T> { x: Vec2<T>, y: Vec2<T> }
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2012-11-20 12:27:17 +00:00
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pub impl<T:Copy NumCast> Mat2<T> {
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2012-11-15 02:23:39 +00:00
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#[inline(always)]
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2012-11-20 12:27:17 +00:00
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static pure fn new(c0r0: T, c0r1: T,
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2012-11-15 02:23:39 +00:00
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c1r0: T, c1r1: T) -> Mat2<T> {
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Mat2::from_cols(Vec2::new(move c0r0, move c0r1),
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Vec2::new(move c1r0, move c1r1))
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}
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#[inline(always)]
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2012-11-20 12:27:17 +00:00
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static pure fn from_cols(c0: Vec2<T>, c1: Vec2<T>) -> Mat2<T> {
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2012-11-15 02:23:39 +00:00
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Mat2 { x: move c0,
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y: move c1 }
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}
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#[inline(always)]
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2012-11-20 12:27:17 +00:00
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static pure fn from_value(value: T) -> Mat2<T> {
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2012-11-15 02:23:39 +00:00
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let _0 = cast(0);
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Mat2::new(value, _0,
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_0, value)
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}
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2012-12-01 12:49:24 +00:00
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// FIXME: An interim solution to the issues with static functions
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#[inline(always)]
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static pure fn identity() -> Mat2<T> {
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let _0 = cast(0);
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let _1 = cast(1);
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Mat2::new(_1, _0,
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_0, _1)
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}
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// FIXME: An interim solution to the issues with static functions
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#[inline(always)]
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static pure fn zero() -> Mat2<T> {
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let _0 = cast(0);
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Mat2::new(_0, _0,
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_0, _0)
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}
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2012-11-15 02:23:39 +00:00
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}
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2012-12-02 22:15:40 +00:00
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pub impl<T:Copy Num NumCast DefaultEq> Mat2<T>: Matrix<T, Vec2<T>> {
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2012-11-15 02:23:39 +00:00
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn col(&self, i: uint) -> Vec2<T> { self[i] }
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2012-11-15 02:23:39 +00:00
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn row(&self, i: uint) -> Vec2<T> {
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2012-11-15 02:23:39 +00:00
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Vec2::new(self[0][i],
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self[1][i])
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}
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2012-12-01 04:19:21 +00:00
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#[inline(always)]
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2012-12-02 22:15:40 +00:00
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static pure fn identity() -> Mat2<T> {
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let _0 = cast(0);
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let _1 = cast(1);
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Mat2::new(_1, _0,
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_0, _1)
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2012-11-21 08:35:26 +00:00
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}
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2012-12-02 22:15:40 +00:00
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2012-11-20 06:57:32 +00:00
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#[inline(always)]
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static pure fn zero() -> Mat2<T> {
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2012-12-01 12:49:24 +00:00
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let _0 = cast(0);
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Mat2::new(_0, _0,
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_0, _0)
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2012-11-20 06:57:32 +00:00
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}
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2012-11-15 02:23:39 +00:00
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn mul_t(&self, value: T) -> Mat2<T> {
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2012-11-15 02:23:39 +00:00
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Mat2::from_cols(self[0].mul_t(value),
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self[1].mul_t(value))
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}
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn mul_v(&self, other: &Vec2<T>) -> Vec2<T> {
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2012-11-15 02:23:39 +00:00
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Vec2::new(self.row(0).dot(other),
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self.row(1).dot(other))
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}
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn add_m(&self, other: &Mat2<T>) -> Mat2<T> {
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2012-11-15 02:23:39 +00:00
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Mat2::from_cols(self[0].add_v(&other[0]),
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self[1].add_v(&other[1]))
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}
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn sub_m(&self, other: &Mat2<T>) -> Mat2<T> {
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2012-11-15 02:23:39 +00:00
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Mat2::from_cols(self[0].sub_v(&other[0]),
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self[1].sub_v(&other[1]))
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}
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2012-11-20 06:57:32 +00:00
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2012-11-15 02:23:39 +00:00
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn mul_m(&self, other: &Mat2<T>) -> Mat2<T> {
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2012-11-15 02:23:39 +00:00
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Mat2::new(self.row(0).dot(&other.col(0)), self.row(1).dot(&other.col(0)),
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self.row(0).dot(&other.col(1)), self.row(1).dot(&other.col(1)))
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}
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2012-11-21 23:24:43 +00:00
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2012-11-30 03:13:20 +00:00
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pure fn dot(&self, other: &Mat2<T>) -> T {
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other.transpose().mul_m(self).trace()
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2012-11-21 23:24:43 +00:00
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}
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2012-11-15 02:23:39 +00:00
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2012-12-03 01:08:36 +00:00
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pure fn determinant(&self) -> T {
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2012-11-21 08:08:08 +00:00
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self[0][0] * self[1][1] - self[1][0] * self[0][1]
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2012-11-15 02:23:39 +00:00
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}
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2012-11-30 03:13:20 +00:00
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pure fn trace(&self) -> T {
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2012-11-21 21:27:44 +00:00
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self[0][0] + self[1][1]
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}
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2012-11-15 02:23:39 +00:00
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn invert(&self) -> Option<Mat2<T>> {
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2012-11-15 02:23:39 +00:00
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let _0 = cast(0);
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2012-12-03 01:08:36 +00:00
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let d = self.determinant();
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2012-11-20 05:35:06 +00:00
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if d.default_eq(&_0) {
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2012-11-15 02:23:39 +00:00
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None
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} else {
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2012-11-21 08:08:08 +00:00
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Some(Mat2::new( self[1][1]/d, -self[0][1]/d,
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-self[1][0]/d, self[0][0]/d))
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2012-11-15 02:23:39 +00:00
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}
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}
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn transpose(&self) -> Mat2<T> {
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2012-11-15 02:23:39 +00:00
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Mat2::new(self[0][0], self[1][0],
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self[0][1], self[1][1])
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}
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn is_identity(&self) -> bool {
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2012-12-02 22:15:40 +00:00
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// self.default_eq(&Matrix::identity()) // FIXME: there's something wrong with static functions here!
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2012-12-01 12:49:24 +00:00
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self.default_eq(&Mat2::identity())
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2012-11-15 02:23:39 +00:00
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}
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn is_diagonal(&self) -> bool {
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2012-11-15 02:23:39 +00:00
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let _0 = cast(0);
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2012-11-20 05:35:06 +00:00
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self[0][1].default_eq(&_0) &&
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self[1][0].default_eq(&_0)
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2012-11-15 02:23:39 +00:00
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}
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn is_rotated(&self) -> bool {
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2012-12-02 22:15:40 +00:00
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// !self.default_eq(&Matrix::identity()) // FIXME: there's something wrong with static functions here!
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2012-12-01 12:49:24 +00:00
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!self.default_eq(&Mat2::identity())
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2012-11-15 02:23:39 +00:00
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}
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2012-12-02 22:15:40 +00:00
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#[inline(always)]
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pure fn is_symmetric(&self) -> bool {
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self[0][1].default_eq(&self[1][0]) &&
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self[1][0].default_eq(&self[0][1])
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}
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2012-11-15 02:23:39 +00:00
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn is_invertible(&self) -> bool {
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2012-11-15 02:23:39 +00:00
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let _0 = cast(0);
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2012-12-03 01:08:36 +00:00
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!self.determinant().default_eq(&_0)
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2012-11-15 02:23:39 +00:00
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}
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}
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2012-12-02 22:15:40 +00:00
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pub impl<T:Copy NumCast> Mat2<T>: Matrix2<T, Vec2<T>> {
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2012-11-15 02:23:39 +00:00
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn to_mat3(&self) -> Mat3<T> {
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Mat3::from_Mat2(self)
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2012-11-15 02:23:39 +00:00
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}
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#[inline(always)]
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2012-11-30 03:13:20 +00:00
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pure fn to_mat4(&self) -> Mat4<T> {
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Mat4::from_Mat2(self)
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2012-11-15 02:23:39 +00:00
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}
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}
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2012-12-02 22:15:40 +00:00
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pub impl<T:Copy> Mat2<T>: Dimensional<Vec2<T>> {
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#[inline(always)]
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static pure fn dim() -> uint { 2 }
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#[inline(always)]
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static pure fn size_of() -> uint { size_of::<Mat2<T>>() }
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}
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pub impl<T:Copy> Mat2<T>: Index<uint, Vec2<T>> {
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#[inline(always)]
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pure fn index(i: uint) -> Vec2<T> {
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unsafe { do buf_as_slice(
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transmute::<*Mat2<T>, *Vec2<T>>(
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to_unsafe_ptr(&self)), 2) |slice| { slice[i] }
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}
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}
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}
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pub impl<T:Copy> Mat2<T>: ToPtr<T> {
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#[inline(always)]
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pure fn to_ptr(&self) -> *T {
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self[0].to_ptr()
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}
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}
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pub impl<T:Copy Num NumCast> Mat2<T>: Neg<Mat2<T>> {
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#[inline(always)]
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pure fn neg(&self) -> Mat2<T> {
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Mat2::from_cols(-self[0], -self[1])
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}
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}
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2012-11-20 05:35:06 +00:00
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pub impl<T:Copy DefaultEq> Mat2<T>: Eq {
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2012-11-15 02:23:39 +00:00
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#[inline(always)]
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2012-11-29 03:14:42 +00:00
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pure fn eq(&self, other: &Mat2<T>) -> bool {
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2012-11-29 03:49:57 +00:00
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self[0] == other[0] &&
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self[1] == other[1]
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2012-11-15 02:23:39 +00:00
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}
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#[inline(always)]
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2012-11-29 03:14:42 +00:00
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pure fn ne(&self, other: &Mat2<T>) -> bool {
|
|
|
|
!(self == other)
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T:Copy FuzzyEq> Mat2<T>: FuzzyEq {
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn fuzzy_eq(other: &Mat2<T>) -> bool {
|
|
|
|
self[0].fuzzy_eq(&other[0]) &&
|
|
|
|
self[1].fuzzy_eq(&other[1])
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-11-20 05:35:06 +00:00
|
|
|
pub impl<T:Copy DefaultEq> Mat2<T>: DefaultEq {
|
|
|
|
#[inline(always)]
|
2012-12-01 05:05:11 +00:00
|
|
|
pure fn default_eq(&self, other: &Mat2<T>) -> bool {
|
2012-11-20 05:35:06 +00:00
|
|
|
self[0].default_eq(&other[0]) &&
|
|
|
|
self[1].default_eq(&other[1])
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-11-15 02:23:39 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2012-12-02 22:15:40 +00:00
|
|
|
/**
|
|
|
|
* A 3 x 3 column major matrix
|
|
|
|
*/
|
2012-11-15 02:23:39 +00:00
|
|
|
pub struct Mat3<T> { x: Vec3<T>, y: Vec3<T>, z: Vec3<T> }
|
|
|
|
|
2012-11-20 12:27:17 +00:00
|
|
|
pub impl<T:Copy NumCast> Mat3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-20 12:27:17 +00:00
|
|
|
static pure fn new(c0r0:T, c0r1:T, c0r2:T,
|
2012-11-15 02:23:39 +00:00
|
|
|
c1r0:T, c1r1:T, c1r2:T,
|
|
|
|
c2r0:T, c2r1:T, c2r2:T) -> Mat3<T> {
|
|
|
|
Mat3::from_cols(Vec3::new(move c0r0, move c0r1, move c0r2),
|
|
|
|
Vec3::new(move c1r0, move c1r1, move c1r2),
|
|
|
|
Vec3::new(move c2r0, move c2r1, move c2r2))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-20 12:27:17 +00:00
|
|
|
static pure fn from_cols(c0: Vec3<T>, c1: Vec3<T>, c2: Vec3<T>) -> Mat3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat3 { x: move c0,
|
|
|
|
y: move c1,
|
|
|
|
z: move c2 }
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-20 12:27:17 +00:00
|
|
|
static pure fn from_value(value: T) -> Mat3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
|
|
|
Mat3::new(value, _0, _0,
|
|
|
|
_0, value, _0,
|
|
|
|
_0, _0, value)
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-20 12:27:17 +00:00
|
|
|
static pure fn from_Mat2(m: &Mat2<T>) -> Mat3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
|
|
|
let _1 = cast(1);
|
|
|
|
Mat3::new(m[0][0], m[0][1], _0,
|
|
|
|
m[1][0], m[1][1], _0,
|
|
|
|
_0, _0, _1)
|
|
|
|
}
|
2012-12-01 12:49:24 +00:00
|
|
|
|
|
|
|
// FIXME: An interim solution to the issues with static functions
|
|
|
|
#[inline(always)]
|
|
|
|
static pure fn identity() -> Mat3<T> {
|
|
|
|
let _0 = cast(0);
|
|
|
|
let _1 = cast(1);
|
|
|
|
Mat3::new(_1, _0, _0,
|
|
|
|
_0, _1, _0,
|
|
|
|
_0, _0, _1)
|
|
|
|
}
|
|
|
|
|
|
|
|
// FIXME: An interim solution to the issues with static functions
|
|
|
|
#[inline(always)]
|
|
|
|
static pure fn zero() -> Mat3<T> {
|
|
|
|
let _0 = cast(0);
|
|
|
|
Mat3::new(_0, _0, _0,
|
|
|
|
_0, _0, _0,
|
|
|
|
_0, _0, _0)
|
|
|
|
}
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
2012-12-02 22:15:40 +00:00
|
|
|
pub impl<T:Copy Num NumCast DefaultEq> Mat3<T>: Matrix<T, Vec3<T>> {
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn col(&self, i: uint) -> Vec3<T> { self[i] }
|
2012-11-15 02:23:39 +00:00
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn row(&self, i: uint) -> Vec3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Vec3::new(self[0][i],
|
|
|
|
self[1][i],
|
|
|
|
self[2][i])
|
|
|
|
}
|
2012-12-01 04:19:21 +00:00
|
|
|
|
|
|
|
#[inline(always)]
|
2012-12-02 22:15:40 +00:00
|
|
|
static pure fn identity() -> Mat3<T> {
|
|
|
|
let _0 = cast(0);
|
|
|
|
let _1 = cast(1);
|
|
|
|
Mat3::new(_1, _0, _0,
|
|
|
|
_0, _1, _0,
|
|
|
|
_0, _0, _1)
|
2012-11-21 08:35:26 +00:00
|
|
|
}
|
2012-12-02 22:15:40 +00:00
|
|
|
|
2012-11-20 06:57:32 +00:00
|
|
|
#[inline(always)]
|
|
|
|
static pure fn zero() -> Mat3<T> {
|
2012-12-01 12:49:24 +00:00
|
|
|
let _0 = cast(0);
|
|
|
|
Mat3::new(_0, _0, _0,
|
|
|
|
_0, _0, _0,
|
|
|
|
_0, _0, _0)
|
2012-11-20 06:57:32 +00:00
|
|
|
}
|
|
|
|
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn mul_t(&self, value: T) -> Mat3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat3::from_cols(self[0].mul_t(value),
|
|
|
|
self[1].mul_t(value),
|
|
|
|
self[2].mul_t(value))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn mul_v(&self, other: &Vec3<T>) -> Vec3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Vec3::new(self.row(0).dot(other),
|
|
|
|
self.row(1).dot(other),
|
|
|
|
self.row(2).dot(other))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn add_m(&self, other: &Mat3<T>) -> Mat3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat3::from_cols(self[0].add_v(&other[0]),
|
|
|
|
self[1].add_v(&other[1]),
|
|
|
|
self[2].add_v(&other[2]))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn sub_m(&self, other: &Mat3<T>) -> Mat3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat3::from_cols(self[0].sub_v(&other[0]),
|
|
|
|
self[1].sub_v(&other[1]),
|
|
|
|
self[2].sub_v(&other[2]))
|
|
|
|
}
|
2012-11-20 06:57:32 +00:00
|
|
|
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn mul_m(&self, other: &Mat3<T>) -> Mat3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat3::new(self.row(0).dot(&other.col(0)), self.row(1).dot(&other.col(0)), self.row(2).dot(&other.col(0)),
|
|
|
|
self.row(0).dot(&other.col(1)), self.row(1).dot(&other.col(1)), self.row(2).dot(&other.col(1)),
|
|
|
|
self.row(0).dot(&other.col(2)), self.row(1).dot(&other.col(2)), self.row(2).dot(&other.col(2)))
|
|
|
|
}
|
|
|
|
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn dot(&self, other: &Mat3<T>) -> T {
|
|
|
|
other.transpose().mul_m(self).trace()
|
2012-11-21 23:24:43 +00:00
|
|
|
}
|
|
|
|
|
2012-12-03 01:08:36 +00:00
|
|
|
pure fn determinant(&self) -> T {
|
2012-11-15 02:23:39 +00:00
|
|
|
self.col(0).dot(&self.col(1).cross(&self.col(2)))
|
|
|
|
}
|
|
|
|
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn trace(&self) -> T {
|
2012-11-21 21:27:44 +00:00
|
|
|
self[0][0] + self[1][1] + self[2][2]
|
|
|
|
}
|
|
|
|
|
2012-11-15 02:23:39 +00:00
|
|
|
// #[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn invert(&self) -> Option<Mat3<T>> {
|
2012-12-03 01:08:36 +00:00
|
|
|
let d = self.determinant();
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
2012-11-20 05:35:06 +00:00
|
|
|
if d.default_eq(&_0) {
|
2012-11-15 02:23:39 +00:00
|
|
|
None
|
|
|
|
} else {
|
|
|
|
Some(Mat3::from_cols(self[1].cross(&self[2]).div_t(d),
|
|
|
|
self[2].cross(&self[0]).div_t(d),
|
|
|
|
self[0].cross(&self[1]).div_t(d))
|
|
|
|
.transpose())
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn transpose(&self) -> Mat3<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat3::new(self[0][0], self[1][0], self[2][0],
|
|
|
|
self[0][1], self[1][1], self[2][1],
|
|
|
|
self[0][2], self[1][2], self[2][2])
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn is_identity(&self) -> bool {
|
2012-12-02 22:15:40 +00:00
|
|
|
// self.default_eq(&Matrix::identity()) // FIXME: there's something wrong with static functions here!
|
2012-12-01 12:49:24 +00:00
|
|
|
self.default_eq(&Mat3::identity())
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn is_diagonal(&self) -> bool {
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
2012-11-20 05:35:06 +00:00
|
|
|
self[0][1].default_eq(&_0) &&
|
|
|
|
self[0][2].default_eq(&_0) &&
|
2012-11-15 02:23:39 +00:00
|
|
|
|
2012-11-20 05:35:06 +00:00
|
|
|
self[1][0].default_eq(&_0) &&
|
|
|
|
self[1][2].default_eq(&_0) &&
|
2012-11-15 02:23:39 +00:00
|
|
|
|
2012-11-20 05:35:06 +00:00
|
|
|
self[2][0].default_eq(&_0) &&
|
|
|
|
self[2][1].default_eq(&_0)
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn is_rotated(&self) -> bool {
|
2012-12-02 22:15:40 +00:00
|
|
|
// !self.default_eq(&Matrix::identity()) // FIXME: there's something wrong with static functions here!
|
2012-12-01 12:49:24 +00:00
|
|
|
!self.default_eq(&Mat3::identity())
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
2012-12-02 22:15:40 +00:00
|
|
|
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn is_symmetric(&self) -> bool {
|
|
|
|
self[0][1].default_eq(&self[1][0]) &&
|
|
|
|
self[0][2].default_eq(&self[2][0]) &&
|
|
|
|
|
|
|
|
self[1][0].default_eq(&self[0][1]) &&
|
|
|
|
self[1][2].default_eq(&self[2][1]) &&
|
|
|
|
|
|
|
|
self[2][0].default_eq(&self[0][2]) &&
|
|
|
|
self[2][1].default_eq(&self[1][2])
|
|
|
|
}
|
2012-11-15 02:23:39 +00:00
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn is_invertible(&self) -> bool {
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
2012-12-03 01:08:36 +00:00
|
|
|
!self.determinant().default_eq(&_0)
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-12-02 22:15:40 +00:00
|
|
|
pub impl<T:Copy NumCast> Mat3<T>: Matrix3<T, Vec3<T>> {
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn to_mat4(&self) -> Mat4<T> {
|
|
|
|
Mat4::from_Mat3(self)
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-11-21 21:27:44 +00:00
|
|
|
pub impl<T:Copy Num NumCast Ord DefaultEq> Mat3<T>: ToQuat<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
pure fn to_Quat() -> Quat<T> {
|
|
|
|
// Implemented using a mix of ideas from jMonkeyEngine and Ken Shoemake's
|
|
|
|
// paper on Quaternions: http://www.cs.ucr.edu/~vbz/resources/Quatut.pdf
|
|
|
|
|
|
|
|
let mut s: float;
|
|
|
|
let w: float, x: float, y: float, z: float;
|
2012-11-21 21:27:44 +00:00
|
|
|
let trace: float = cast(self.trace());
|
2012-11-15 02:23:39 +00:00
|
|
|
|
|
|
|
if trace >= cast(0) {
|
|
|
|
s = (trace + 1f).sqrt();
|
|
|
|
w = 0.5 * s;
|
|
|
|
s = 0.5 / s;
|
|
|
|
x = (self[1][2] - self[2][1]).cast::<float>() * s;
|
|
|
|
y = (self[2][0] - self[0][2]).cast::<float>() * s;
|
|
|
|
z = (self[0][1] - self[1][0]).cast::<float>() * s;
|
|
|
|
} else if (self[0][0] > self[1][1]) && (self[0][0] > self[2][2]) {
|
|
|
|
s = (1f + (self[0][0] - self[1][1] - self[2][2]).cast::<float>()).sqrt();
|
|
|
|
w = 0.5 * s;
|
|
|
|
s = 0.5 / s;
|
|
|
|
x = (self[0][1] - self[1][0]).cast::<float>() * s;
|
|
|
|
y = (self[2][0] - self[0][2]).cast::<float>() * s;
|
|
|
|
z = (self[1][2] - self[2][1]).cast::<float>() * s;
|
|
|
|
} else if self[1][1] > self[2][2] {
|
|
|
|
s = (1f + (self[1][1] - self[0][0] - self[2][2]).cast::<float>()).sqrt();
|
|
|
|
w = 0.5 * s;
|
|
|
|
s = 0.5 / s;
|
|
|
|
x = (self[0][1] - self[1][0]).cast::<float>() * s;
|
|
|
|
y = (self[1][2] - self[2][1]).cast::<float>() * s;
|
|
|
|
z = (self[2][0] - self[0][2]).cast::<float>() * s;
|
|
|
|
} else {
|
|
|
|
s = (1f + (self[2][2] - self[0][0] - self[1][1]).cast::<float>()).sqrt();
|
|
|
|
w = 0.5 * s;
|
|
|
|
s = 0.5 / s;
|
|
|
|
x = (self[2][0] - self[0][2]).cast::<float>() * s;
|
|
|
|
y = (self[1][2] - self[2][1]).cast::<float>() * s;
|
|
|
|
z = (self[0][1] - self[1][0]).cast::<float>() * s;
|
|
|
|
}
|
|
|
|
|
|
|
|
Quat::new(cast(w), cast(x), cast(y), cast(z))
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-12-02 22:15:40 +00:00
|
|
|
pub impl<T:Copy> Mat3<T>: Dimensional<Vec3<T>> {
|
|
|
|
#[inline(always)]
|
|
|
|
static pure fn dim() -> uint { 3 }
|
|
|
|
|
|
|
|
#[inline(always)]
|
|
|
|
static pure fn size_of() -> uint { size_of::<Mat3<T>>() }
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T:Copy> Mat3<T>: Index<uint, Vec3<T>> {
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn index(i: uint) -> Vec3<T> {
|
|
|
|
unsafe { do buf_as_slice(
|
|
|
|
transmute::<*Mat3<T>, *Vec3<T>>(
|
|
|
|
to_unsafe_ptr(&self)), 3) |slice| { slice[i] }
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T:Copy> Mat3<T>: ToPtr<T> {
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn to_ptr(&self) -> *T {
|
|
|
|
self[0].to_ptr()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T:Copy Num NumCast> Mat3<T>: Neg<Mat3<T>> {
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn neg(&self) -> Mat3<T> {
|
|
|
|
Mat3::from_cols(-self[0], -self[1], -self[2])
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-11-20 05:35:06 +00:00
|
|
|
pub impl<T:Copy DefaultEq> Mat3<T>: Eq {
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-29 03:14:42 +00:00
|
|
|
pure fn eq(&self, other: &Mat3<T>) -> bool {
|
2012-11-29 03:49:57 +00:00
|
|
|
self[0] == other[0] &&
|
|
|
|
self[1] == other[1] &&
|
|
|
|
self[2] == other[2]
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-29 03:14:42 +00:00
|
|
|
pure fn ne(&self, other: &Mat3<T>) -> bool {
|
|
|
|
!(self == other)
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T:Copy FuzzyEq> Mat3<T>: FuzzyEq {
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn fuzzy_eq(other: &Mat3<T>) -> bool {
|
|
|
|
self[0].fuzzy_eq(&other[0]) &&
|
|
|
|
self[1].fuzzy_eq(&other[1]) &&
|
|
|
|
self[2].fuzzy_eq(&other[2])
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-11-20 05:35:06 +00:00
|
|
|
pub impl<T:Copy DefaultEq> Mat3<T>: DefaultEq {
|
|
|
|
#[inline(always)]
|
2012-12-01 05:05:11 +00:00
|
|
|
pure fn default_eq(&self, other: &Mat3<T>) -> bool {
|
2012-11-20 05:35:06 +00:00
|
|
|
self[0].default_eq(&other[0]) &&
|
|
|
|
self[1].default_eq(&other[1]) &&
|
|
|
|
self[2].default_eq(&other[2])
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-11-15 02:23:39 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2012-12-02 22:15:40 +00:00
|
|
|
/**
|
|
|
|
* A 4 x 4 column major matrix
|
|
|
|
*/
|
2012-11-15 02:23:39 +00:00
|
|
|
pub struct Mat4<T> { x: Vec4<T>, y: Vec4<T>, z: Vec4<T>, w: Vec4<T> }
|
|
|
|
|
2012-11-20 12:27:17 +00:00
|
|
|
pub impl<T:Copy NumCast> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-20 12:27:17 +00:00
|
|
|
static pure fn new(c0r0: T, c0r1: T, c0r2: T, c0r3: T,
|
2012-11-15 02:23:39 +00:00
|
|
|
c1r0: T, c1r1: T, c1r2: T, c1r3: T,
|
|
|
|
c2r0: T, c2r1: T, c2r2: T, c2r3: T,
|
|
|
|
c3r0: T, c3r1: T, c3r2: T, c3r3: T) -> Mat4<T> {
|
|
|
|
Mat4::from_cols(Vec4::new(move c0r0, move c0r1, move c0r2, move c0r3),
|
|
|
|
Vec4::new(move c1r0, move c1r1, move c1r2, move c1r3),
|
|
|
|
Vec4::new(move c2r0, move c2r1, move c2r2, move c2r3),
|
|
|
|
Vec4::new(move c3r0, move c3r1, move c3r2, move c3r3))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-20 12:27:17 +00:00
|
|
|
static pure fn from_cols(c0: Vec4<T>, c1: Vec4<T>, c2: Vec4<T>, c3: Vec4<T>) -> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat4 { x: move c0,
|
|
|
|
y: move c1,
|
|
|
|
z: move c2,
|
|
|
|
w: move c3 }
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-20 12:27:17 +00:00
|
|
|
static pure fn from_value(value: T) -> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
|
|
|
Mat4::new(value, _0, _0, _0,
|
|
|
|
_0, value, _0, _0,
|
|
|
|
_0, _0, value, _0,
|
|
|
|
_0, _0, _0, value)
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-20 12:27:17 +00:00
|
|
|
static pure fn from_Mat2(m: &Mat2<T>) -> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
|
|
|
let _1 = cast(1);
|
|
|
|
Mat4::new(m[0][0], m[0][1], _0, _0,
|
|
|
|
m[1][0], m[1][1], _0, _0,
|
|
|
|
_0, _0, _1, _0,
|
|
|
|
_0, _0, _0, _1)
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-20 12:27:17 +00:00
|
|
|
static pure fn from_Mat3(m: &Mat3<T>) -> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
|
|
|
let _1 = cast(1);
|
|
|
|
Mat4::new(m[0][0], m[0][1], m[0][2], _0,
|
|
|
|
m[1][0], m[1][1], m[1][2], _0,
|
|
|
|
m[2][0], m[2][1], m[2][2], _0,
|
|
|
|
_0, _0, _0, _1)
|
|
|
|
}
|
2012-12-01 12:49:24 +00:00
|
|
|
|
|
|
|
// FIXME: An interim solution to the issues with static functions
|
|
|
|
#[inline(always)]
|
|
|
|
static pure fn identity() -> Mat4<T> {
|
|
|
|
let _0 = cast(0);
|
|
|
|
let _1 = cast(1);
|
|
|
|
Mat4::new(_1, _0, _0, _0,
|
|
|
|
_0, _1, _0, _0,
|
|
|
|
_0, _0, _1, _0,
|
|
|
|
_0, _0, _0, _1)
|
|
|
|
}
|
|
|
|
|
|
|
|
// FIXME: An interim solution to the issues with static functions
|
|
|
|
#[inline(always)]
|
|
|
|
static pure fn zero() -> Mat4<T> {
|
|
|
|
let _0 = cast(0);
|
|
|
|
Mat4::new(_0, _0, _0, _0,
|
|
|
|
_0, _0, _0, _0,
|
|
|
|
_0, _0, _0, _0,
|
|
|
|
_0, _0, _0, _0)
|
|
|
|
}
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
2012-12-02 22:15:40 +00:00
|
|
|
pub impl<T:Copy Num NumCast DefaultEq Sign Ord> Mat4<T>: Matrix<T, Vec4<T>> {
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn col(&self, i: uint) -> Vec4<T> { self[i] }
|
2012-11-15 02:23:39 +00:00
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn row(&self, i: uint) -> Vec4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Vec4::new(self[0][i],
|
|
|
|
self[1][i],
|
|
|
|
self[2][i],
|
|
|
|
self[3][i])
|
|
|
|
}
|
2012-12-01 04:19:21 +00:00
|
|
|
|
2012-11-20 06:57:32 +00:00
|
|
|
#[inline(always)]
|
|
|
|
static pure fn zero() -> Mat4<T> {
|
2012-12-01 12:49:24 +00:00
|
|
|
let _0 = cast(0);
|
|
|
|
Mat4::new(_0, _0, _0, _0,
|
|
|
|
_0, _0, _0, _0,
|
|
|
|
_0, _0, _0, _0,
|
|
|
|
_0, _0, _0, _0)
|
2012-11-20 06:57:32 +00:00
|
|
|
}
|
|
|
|
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn mul_t(&self, value: T) -> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat4::from_cols(self[0].mul_t(value),
|
|
|
|
self[1].mul_t(value),
|
|
|
|
self[2].mul_t(value),
|
|
|
|
self[3].mul_t(value))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn mul_v(&self, other: &Vec4<T>) -> Vec4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Vec4::new(self.row(0).dot(other),
|
|
|
|
self.row(1).dot(other),
|
|
|
|
self.row(2).dot(other),
|
|
|
|
self.row(3).dot(other))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn add_m(&self, other: &Mat4<T>) -> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat4::from_cols(self[0].add_v(&other[0]),
|
|
|
|
self[1].add_v(&other[1]),
|
|
|
|
self[2].add_v(&other[2]),
|
|
|
|
self[3].add_v(&other[3]))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn sub_m(&self, other: &Mat4<T>) -> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat4::from_cols(self[0].sub_v(&other[0]),
|
|
|
|
self[1].sub_v(&other[1]),
|
|
|
|
self[2].sub_v(&other[2]),
|
|
|
|
self[3].sub_v(&other[3]))
|
|
|
|
}
|
2012-12-02 22:15:40 +00:00
|
|
|
|
2012-11-20 06:57:32 +00:00
|
|
|
#[inline(always)]
|
|
|
|
static pure fn identity() -> Mat4<T> {
|
2012-12-01 12:49:24 +00:00
|
|
|
let _0 = cast(0);
|
|
|
|
let _1 = cast(1);
|
|
|
|
Mat4::new(_1, _0, _0, _0,
|
|
|
|
_0, _1, _0, _0,
|
|
|
|
_0, _0, _1, _0,
|
|
|
|
_0, _0, _0, _1)
|
2012-11-20 06:57:32 +00:00
|
|
|
}
|
|
|
|
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn mul_m(&self, other: &Mat4<T>) -> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
// Surprisingly when building with optimisation turned on this is actually
|
|
|
|
// faster than writing out the matrix multiplication in expanded form.
|
|
|
|
// If you don't believe me, see ./test/performance/matrix_mul.rs
|
|
|
|
Mat4::new(self.row(0).dot(&other.col(0)), self.row(1).dot(&other.col(0)), self.row(2).dot(&other.col(0)), self.row(3).dot(&other.col(0)),
|
|
|
|
self.row(0).dot(&other.col(1)), self.row(1).dot(&other.col(1)), self.row(2).dot(&other.col(1)), self.row(3).dot(&other.col(1)),
|
|
|
|
self.row(0).dot(&other.col(2)), self.row(1).dot(&other.col(2)), self.row(2).dot(&other.col(2)), self.row(3).dot(&other.col(2)),
|
|
|
|
self.row(0).dot(&other.col(3)), self.row(1).dot(&other.col(3)), self.row(2).dot(&other.col(3)), self.row(3).dot(&other.col(3)))
|
|
|
|
}
|
|
|
|
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn dot(&self, other: &Mat4<T>) -> T {
|
|
|
|
other.transpose().mul_m(self).trace()
|
2012-11-21 23:24:43 +00:00
|
|
|
}
|
|
|
|
|
2012-12-03 01:08:36 +00:00
|
|
|
pure fn determinant(&self) -> T {
|
2012-11-15 02:23:39 +00:00
|
|
|
self[0][0]*Mat3::new(self[1][1], self[2][1], self[3][1],
|
|
|
|
self[1][2], self[2][2], self[3][2],
|
2012-12-03 01:08:36 +00:00
|
|
|
self[1][3], self[2][3], self[3][3]).determinant() -
|
2012-11-15 02:23:39 +00:00
|
|
|
self[1][0]*Mat3::new(self[0][1], self[2][1], self[3][1],
|
|
|
|
self[0][2], self[2][2], self[3][2],
|
2012-12-03 01:08:36 +00:00
|
|
|
self[0][3], self[2][3], self[3][3]).determinant() +
|
2012-11-15 02:23:39 +00:00
|
|
|
self[2][0]*Mat3::new(self[0][1], self[1][1], self[3][1],
|
|
|
|
self[0][2], self[1][2], self[3][2],
|
2012-12-03 01:08:36 +00:00
|
|
|
self[0][3], self[1][3], self[3][3]).determinant() -
|
2012-11-15 02:23:39 +00:00
|
|
|
self[3][0]*Mat3::new(self[0][1], self[1][1], self[2][1],
|
|
|
|
self[0][2], self[1][2], self[2][2],
|
2012-12-03 01:08:36 +00:00
|
|
|
self[0][3], self[1][3], self[2][3]).determinant()
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn trace(&self) -> T {
|
2012-11-21 21:27:44 +00:00
|
|
|
self[0][0] + self[1][1] + self[2][2] + self[3][3]
|
|
|
|
}
|
|
|
|
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn invert(&self) -> Option<Mat4<T>> {
|
2012-12-03 01:08:36 +00:00
|
|
|
let d = self.determinant();
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
2012-11-20 05:35:06 +00:00
|
|
|
if d.default_eq(&_0) {
|
2012-11-15 02:23:39 +00:00
|
|
|
None
|
|
|
|
} else {
|
|
|
|
|
|
|
|
// Gauss Jordan Elimination with partial pivoting
|
|
|
|
|
2012-11-30 03:13:20 +00:00
|
|
|
let mut a = *self;
|
2012-12-02 22:15:40 +00:00
|
|
|
// let mut inv: Mat4<T> = Matrix::identity(); // FIXME: there's something wrong with static functions here!
|
2012-12-01 12:49:24 +00:00
|
|
|
let mut inv = Mat4::identity();
|
2012-11-15 02:23:39 +00:00
|
|
|
|
|
|
|
// Find largest pivot column j among rows j..3
|
|
|
|
for uint::range(0, 4) |j| {
|
|
|
|
let mut i1 = j;
|
|
|
|
for uint::range(j + 1, 4) |i| {
|
|
|
|
if abs(&a[i][j]) > abs(&a[i1][j]) {
|
|
|
|
i1 = i;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Swap rows i1 and j in a and inv to
|
|
|
|
// put pivot on diagonal
|
|
|
|
let c = [mut a.x, a.y, a.z, a.w];
|
|
|
|
c[i1] <-> c[j];
|
|
|
|
a = Mat4::from_cols(c[0], c[1], c[2], c[3]);
|
|
|
|
let c = [mut inv.x, inv.y, inv.z, inv.w];
|
|
|
|
c[i1] <-> c[j];
|
|
|
|
inv = Mat4::from_cols(c[0], c[1], c[2], c[3]);
|
|
|
|
|
|
|
|
// Scale row j to have a unit diagonal
|
|
|
|
let c = [mut inv.x, inv.y, inv.z, inv.w];
|
|
|
|
c[j] = c[j].div_t(a[j][j]);
|
|
|
|
inv = Mat4::from_cols(c[0], c[1], c[2], c[3]);
|
|
|
|
let c = [mut a.x, a.y, a.z, a.w];
|
|
|
|
c[j] = c[j].div_t(a[j][j]);
|
|
|
|
a = Mat4::from_cols(c[0], c[1], c[2], c[3]);
|
|
|
|
|
|
|
|
// Eliminate off-diagonal elems in col j of a,
|
|
|
|
// doing identical ops to inv
|
|
|
|
for uint::range(0, 4) |i| {
|
|
|
|
if i != j {
|
|
|
|
let c = [mut inv.x, inv.y, inv.z, inv.w];
|
|
|
|
c[i] = c[i].sub_v(&c[j].mul_t(a[i][j]));
|
|
|
|
inv = Mat4::from_cols(c[0], c[1], c[2], c[3]);
|
|
|
|
|
|
|
|
let c = [mut a.x, a.y, a.z, a.w];
|
|
|
|
c[i] = c[i].sub_v(&c[j].mul_t(a[i][j]));
|
|
|
|
a = Mat4::from_cols(c[0], c[1], c[2], c[3]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2012-11-21 21:03:33 +00:00
|
|
|
Some(inv)
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn transpose(&self) -> Mat4<T> {
|
2012-11-15 02:23:39 +00:00
|
|
|
Mat4::new(self[0][0], self[1][0], self[2][0], self[3][0],
|
|
|
|
self[0][1], self[1][1], self[2][1], self[3][1],
|
|
|
|
self[0][2], self[1][2], self[2][2], self[3][2],
|
|
|
|
self[0][3], self[1][3], self[2][3], self[3][3])
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn is_identity(&self) -> bool {
|
2012-12-02 22:15:40 +00:00
|
|
|
// self.default_eq(&Matrix::identity()) // FIXME: there's something wrong with static functions here!
|
2012-12-01 12:49:24 +00:00
|
|
|
self.default_eq(&Mat4::identity())
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn is_diagonal(&self) -> bool {
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
2012-11-20 05:35:06 +00:00
|
|
|
self[0][1].default_eq(&_0) &&
|
|
|
|
self[0][2].default_eq(&_0) &&
|
|
|
|
self[0][3].default_eq(&_0) &&
|
2012-11-15 02:23:39 +00:00
|
|
|
|
2012-11-20 05:35:06 +00:00
|
|
|
self[1][0].default_eq(&_0) &&
|
|
|
|
self[1][2].default_eq(&_0) &&
|
|
|
|
self[1][3].default_eq(&_0) &&
|
2012-11-15 02:23:39 +00:00
|
|
|
|
2012-11-20 05:35:06 +00:00
|
|
|
self[2][0].default_eq(&_0) &&
|
|
|
|
self[2][1].default_eq(&_0) &&
|
|
|
|
self[2][3].default_eq(&_0) &&
|
2012-11-15 02:23:39 +00:00
|
|
|
|
2012-11-20 05:35:06 +00:00
|
|
|
self[3][0].default_eq(&_0) &&
|
|
|
|
self[3][1].default_eq(&_0) &&
|
|
|
|
self[3][2].default_eq(&_0)
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn is_rotated(&self) -> bool {
|
2012-12-02 22:15:40 +00:00
|
|
|
// !self.default_eq(&Matrix::identity()) // FIXME: there's something wrong with static functions here!
|
2012-12-01 12:49:24 +00:00
|
|
|
!self.default_eq(&Mat4::identity())
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
2012-12-02 22:15:40 +00:00
|
|
|
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn is_symmetric(&self) -> bool {
|
|
|
|
self[0][1].default_eq(&self[1][0]) &&
|
|
|
|
self[0][2].default_eq(&self[2][0]) &&
|
|
|
|
self[0][3].default_eq(&self[3][0]) &&
|
|
|
|
|
|
|
|
self[1][0].default_eq(&self[0][1]) &&
|
|
|
|
self[1][2].default_eq(&self[2][1]) &&
|
|
|
|
self[1][3].default_eq(&self[3][1]) &&
|
|
|
|
|
|
|
|
self[2][0].default_eq(&self[0][2]) &&
|
|
|
|
self[2][1].default_eq(&self[1][2]) &&
|
|
|
|
self[2][3].default_eq(&self[3][2]) &&
|
|
|
|
|
|
|
|
self[3][0].default_eq(&self[0][3]) &&
|
|
|
|
self[3][1].default_eq(&self[1][3]) &&
|
|
|
|
self[3][2].default_eq(&self[2][3])
|
|
|
|
}
|
2012-11-15 02:23:39 +00:00
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-30 03:13:20 +00:00
|
|
|
pure fn is_invertible(&self) -> bool {
|
2012-11-15 02:23:39 +00:00
|
|
|
let _0 = cast(0);
|
2012-12-03 01:08:36 +00:00
|
|
|
!self.determinant().default_eq(&_0)
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-12-02 22:15:40 +00:00
|
|
|
pub impl<T> Mat4<T>: Matrix4<T, Vec4<T>> {
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T:Copy Num NumCast> Mat4<T>: Neg<Mat4<T>> {
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn neg(&self) -> Mat4<T> {
|
|
|
|
Mat4::from_cols(-self[0], -self[1], -self[2], -self[3])
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T> Mat4<T>: Dimensional<Vec4<T>> {
|
|
|
|
#[inline(always)]
|
|
|
|
static pure fn dim() -> uint { 4 }
|
2012-11-15 02:23:39 +00:00
|
|
|
|
2012-12-02 22:15:40 +00:00
|
|
|
#[inline(always)]
|
|
|
|
static pure fn size_of() -> uint { size_of::<Mat4<T>>() }
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T:Copy> Mat4<T>: Index<uint, Vec4<T>> {
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn index(i: uint) -> Vec4<T> {
|
|
|
|
unsafe { do buf_as_slice(
|
|
|
|
transmute::<*Mat4<T>, *Vec4<T>>(
|
|
|
|
to_unsafe_ptr(&self)), 4) |slice| { slice[i] }
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T:Copy> Mat4<T>: ToPtr<T> {
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn to_ptr(&self) -> *T {
|
|
|
|
self[0].to_ptr()
|
|
|
|
}
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
2012-11-20 05:35:06 +00:00
|
|
|
pub impl<T:Copy DefaultEq> Mat4<T>: Eq {
|
2012-11-15 02:23:39 +00:00
|
|
|
#[inline(always)]
|
2012-11-29 03:14:42 +00:00
|
|
|
pure fn eq(&self, other: &Mat4<T>) -> bool {
|
2012-11-29 03:49:57 +00:00
|
|
|
self[0] == other[0] &&
|
|
|
|
self[1] == other[1] &&
|
|
|
|
self[2] == other[2] &&
|
|
|
|
self[3] == other[3]
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#[inline(always)]
|
2012-11-29 03:14:42 +00:00
|
|
|
pure fn ne(&self, other: &Mat4<T>) -> bool {
|
|
|
|
!(self == other)
|
2012-11-15 02:23:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub impl<T:Copy FuzzyEq> Mat4<T>: FuzzyEq {
|
|
|
|
#[inline(always)]
|
|
|
|
pure fn fuzzy_eq(other: &Mat4<T>) -> bool {
|
|
|
|
self[0].fuzzy_eq(&other[0]) &&
|
|
|
|
self[1].fuzzy_eq(&other[1]) &&
|
|
|
|
self[2].fuzzy_eq(&other[2]) &&
|
|
|
|
self[3].fuzzy_eq(&other[3])
|
|
|
|
}
|
|
|
|
}
|
2012-11-20 05:35:06 +00:00
|
|
|
|
|
|
|
pub impl<T:Copy DefaultEq> Mat4<T>: DefaultEq {
|
|
|
|
#[inline(always)]
|
2012-12-01 05:05:11 +00:00
|
|
|
pure fn default_eq(&self, other: &Mat4<T>) -> bool {
|
2012-11-20 05:35:06 +00:00
|
|
|
self[0].default_eq(&other[0]) &&
|
|
|
|
self[1].default_eq(&other[1]) &&
|
|
|
|
self[2].default_eq(&other[2]) &&
|
|
|
|
self[3].default_eq(&other[3])
|
|
|
|
}
|
|
|
|
}
|