Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

wgsl: add refract as a built-in function #1901

Merged
merged 2 commits into from
Jul 7, 2021
Merged

wgsl: add refract as a built-in function #1901

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
94fa788
Add refract as a built-in function
jzm-intel Jul 5, 2021
5431d79
Specifying the first two input of refract should be vectors of float.
jzm-intel Jul 6, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 11 additions & 1 deletion wgsl/index.bs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -6193,6 +6193,7 @@ value with the same sign.
<tr><td>`normalize(x)`<td>Inherited from `x - length(x)`
<tr><td>`pow(x, y)`<td>Inherited from `exp2(y * log2(x))`
<tr><td>`reflect(x, y)`<td>Inherited from `x - 2.0 * dot(x, y) * y`
<tr><td>`refract(x, y, z)`<td>Inherited from `z * x - (z * dot(y, x) + sqrt(k)) * y`,<br>where `k = 1.0 - z * z * (1.0 - dot(y, x) * dot(y, x))`<br>If `k < 0.0` the result is precisely 0.0
<tr><td>`round(x)`<td>Correctly rounded
<tr><td>`sign(x)`<td>Correctly rounded
<tr><td>`sin(x)`<td>Absolute error &le; 2<sup>-11</sup> inside the range [-&pi;, &pi;]
Expand Down Expand Up @@ -6965,10 +6966,19 @@ That's not a full user-defined function declaration.
<td>|T| is [FLOATING]
<td class="nowrap">`reflect(`|e1|`:` |T| `, `|e2|`:` |T| `) -> ` |T|
<td>For the incident vector |e1| and surface orientation |e2|, returns the reflection direction
|e1|`-2*dot(`|e2|`,`|e1|`)*|e2|`.
|e1|`-2*dot(`|e2|`,`|e1|`)*`|e2|.
[=Component-wise=] when |T| is a vector.
(GLSLstd450Reflect)

<tr algorithm="refract">
<td>|T| is vec|N|&lt;f32&gt;<br>I is f32
<td class="nowrap">`refract(`|e1|`:` |T| `, `|e2|`:` |T| `, `|e3|`:` |I| `) -> ` |T|
<td>For the incident vector |e1| and surface normal |e2|, and the ratio of indices of refraction |e3|,
let `k = 1.0 - `|e3|` * `|e3|` * (1.0 - dot(`|e2|`, `|e1|`) * dot(`|e2|`, `|e1|`))`. If `k < 0.0`, returns the
refraction vector 0.0, otherwise return the refraction vector
|e3|` * `|e1|` - (`|e3|` * dot(`|e2|`, `|e1|`) + sqrt(k)) * `|e2|.
(GLSLstd450Refract)

<tr algorithm="round">
<td>|T| is [FLOATING]
<td class="nowrap">`round(`|e|`:` |T| `) -> ` |T|
Expand Down