zig/mach
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

math: Move maxDim function inside Ray struct

Browse source
This commit is contained in:
Joel D. Schüller 2023-10-07 16:23:17 +02:00 • committed by Stephen Gutekanst
parent e7c95b8ce9
commit 1c32ae83a7
1 changed files with 16 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

31
src/math/ray.zig
View file

@ -5,21 +5,6 @@ const testing = mach.testing;
const math = mach.math;
const vec = @import("vec.zig");
// Determine the 3D vector dimension with the largest scalar value
fn maxDim(v: math.Vec3) u8 {
if (v.v[0] > v.v[1]) {
if (v.v[0] > v.v[2]) {
return 0;
} else {
return 2;
}
} else if (v.v[1] > v.v[2]) {
return 1;
} else {
return 0;
}
}
// A Ray in three-dimensional space
pub fn Ray(comptime Vec3P: type) type {
// Floating point precision, will be either f16, f32, or f64
@ -45,6 +30,22 @@ pub fn Ray(comptime Vec3P: type) type {
pub usingnamespace switch (Vec3P) {
math.Vec3, math.Vec3h, math.Vec3d => struct {
// Determine the 3D vector dimension with the largest scalar
// value
fn maxDim(v: [3]P) u8 {
if (v[0] > v[1]) {
if (v[0] > v[2]) {
return 0;
} else {
return 2;
}
} else if (v[1] > v[2]) {
return 1;
} else {
return 0;
}
}
// Algorithm based on:
// https://www.jcgt.org/published/0002/01/05/
/// Check for collision of a ray and a triangle in 3D space.