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this.$page.frontmatter.lang||this.$localeConfig.lang||"en-US"}},{key:"$localePath",get:function(){return this.$localeConfig.path||"/"}},{key:"$themeLocaleConfig",get:function(){return(this.$site.themeConfig.locales||{})[this.$localePath]||{}}},{key:"$page",get:function(){return this.__page?this.__page:function(t,e){for(var n=0;n - + @@ -61,6 +61,6 @@ →

- + diff --git a/beginner/tutorial2-swapchain/index.html b/beginner/tutorial2-swapchain/index.html index 0f388070..960b54b5 100644 --- a/beginner/tutorial2-swapchain/index.html +++ b/beginner/tutorial2-swapchain/index.html @@ -8,7 +8,7 @@ - + @@ -250,6 +250,6 @@ event_loop.r →

- + diff --git a/beginner/tutorial3-pipeline/index.html b/beginner/tutorial3-pipeline/index.html index 62402c17..4e730fe2 100644 --- a/beginner/tutorial3-pipeline/index.html +++ b/beginner/tutorial3-pipeline/index.html @@ -8,7 +8,7 @@ - + @@ -153,6 +153,6 @@ fn main(in: VertexOutput) -> [[location(0)]] vec4<f32> { →

- + diff --git a/beginner/tutorial4-buffer/index.html b/beginner/tutorial4-buffer/index.html index 523c69dd..8bf255a0 100644 --- a/beginner/tutorial4-buffer/index.html +++ b/beginner/tutorial4-buffer/index.html @@ -8,7 +8,7 @@ - + @@ -260,6 +260,6 @@ render_pass. →

- + diff --git a/beginner/tutorial5-textures/index.html b/beginner/tutorial5-textures/index.html index 9a3876c3..bf09254b 100644 --- a/beginner/tutorial5-textures/index.html +++ b/beginner/tutorial5-textures/index.html @@ -8,7 +8,7 @@ - + @@ -406,6 +406,6 @@ fn main( →

- + diff --git a/beginner/tutorial6-uniforms/index.html b/beginner/tutorial6-uniforms/index.html index 51663cc1..80ea5933 100644 --- a/beginner/tutorial6-uniforms/index.html +++ b/beginner/tutorial6-uniforms/index.html @@ -8,7 +8,7 @@ - + @@ -328,6 +328,6 @@ fn main( →

- + diff --git a/beginner/tutorial7-instancing/index.html b/beginner/tutorial7-instancing/index.html index 3cef083c..9aae4b2b 100644 --- a/beginner/tutorial7-instancing/index.html +++ b/beginner/tutorial7-instancing/index.html @@ -8,7 +8,7 @@ - + @@ -181,6 +181,6 @@ fn main( →

- + diff --git a/beginner/tutorial8-depth/index.html b/beginner/tutorial8-depth/index.html index c7b06bdd..60414958 100644 --- a/beginner/tutorial8-depth/index.html +++ b/beginner/tutorial8-depth/index.html @@ -8,7 +8,7 @@ - + @@ -109,6 +109,6 @@ →

- + diff --git a/beginner/tutorial9-models/index.html b/beginner/tutorial9-models/index.html index 9aff6b25..2bc24825 100644 --- a/beginner/tutorial9-models/index.html +++ b/beginner/tutorial9-models/index.html @@ -8,7 +8,7 @@ - + @@ -361,6 +361,6 @@ render_pass. →

- + diff --git a/index.html b/index.html index 799698c5..a71d2eaf 100644 --- a/index.html +++ b/index.html @@ -8,7 +8,7 @@ - + @@ -17,6 +17,6 @@ →

- + diff --git a/intermediate/tutorial10-lighting/index.html b/intermediate/tutorial10-lighting/index.html index 87a25fc2..a43e060c 100644 --- a/intermediate/tutorial10-lighting/index.html +++ b/intermediate/tutorial10-lighting/index.html @@ -8,7 +8,7 @@ - + @@ -628,6 +628,6 @@ let specular_strength = pow(max(dot(in.world_normal, half_dir), 0.0), 32.0); →

- + diff --git a/intermediate/tutorial11-normals/index.html b/intermediate/tutorial11-normals/index.html index 8414ed1d..9b6b6e40 100644 --- a/intermediate/tutorial11-normals/index.html +++ b/intermediate/tutorial11-normals/index.html @@ -8,7 +8,7 @@ - + @@ -480,6 +480,6 @@ render_pass. →

- + diff --git a/intermediate/tutorial12-camera/index.html b/intermediate/tutorial12-camera/index.html index 7445c344..2d23918b 100644 --- a/intermediate/tutorial12-camera/index.html +++ b/intermediate/tutorial12-camera/index.html @@ -8,7 +8,7 @@ - + @@ -375,6 +375,6 @@ →

- + diff --git a/intermediate/tutorial13-threading/index.html b/intermediate/tutorial13-threading/index.html index 47d9f812..53f012f5 100644 --- a/intermediate/tutorial13-threading/index.html +++ b/intermediate/tutorial13-threading/index.html @@ -8,7 +8,7 @@ - + @@ -108,6 +108,6 @@ Elapsed (Threaded): 199.645027ms →

- + diff --git a/news/index.html b/news/index.html index ce247f0f..332a62ee 100644 --- a/news/index.html +++ b/news/index.html @@ -8,7 +8,7 @@ - + @@ -24,6 +24,6 @@

- + diff --git a/showcase/alignment/index.html b/showcase/alignment/index.html index 243d6a28..8eee1e75 100644 --- a/showcase/alignment/index.html +++ b/showcase/alignment/index.html @@ -7,14 +7,14 @@ - - + +
Learn Wgpu

# Memory Layout in GLSL

# Alignments

The address of the position of an instance in memory has to a multiple of its alignment.

Normally alignment is the same as size. Exceptions are vec3, structs and arrays.

A vec3 is padded to be a vec4 which means it behaves as if it was a vec4 just that the last entry is not used.

{i,u,b}vec is shorthand for ivec, uvec, bvec so a vector of int or uint or bool. A vec is a vec of float.

type Alignment in bytes size in bytes
int, uint, float, bool 4 4
double 8 8
{i,u,b}vec2 8 8
dvec2 16 16
{i,u,b}vec3 16 12
{i,u,b}vec4 16 16
dvec3 32 24
dvec4 32 32
mat3 (like array of 3 vec3) 16 3*16
mat4 (like array of 4 vec4) 16 4*16

Reference section 7.6.2.2

# In WGPU

To make uniform buffers portable they have to be std140 and not std430. Uniform structs have to be std140. -Storage structs have to be std430.

Storage buffers for compute shaders can be std140 or std430.

# std140 (since GLSL 1.4, OpenGL 3.1)

Array:

  • determine the alignment of the member type and lets name it align_member
  • the alignment of the array is maximum(align_member, 16)

Struct:

  • determine the member with the largest alignment and lets name it max_member_align
  • the alignment of the array is maximum(max_member_align, 16)

# crates to make your struct compatible with std140

glsl_layout crevice

# std430 (since GLSL 4.3, OpenGL 4.3)

more space efficient for structs and arrays

Array

  • alignment is the alignment of the element type

Struct

  • alignment is the alignment of the member with the largest alignment

# crates to make yuor struct compatible with std430

glsl_layout issue crevice issue

Last Updated: 11/24/2020, 6:30:37 AM

+Storage structs have to be std430.

Storage buffers for compute shaders can be std140 or std430.

# std140 (since GLSL 1.4, OpenGL 3.1)

Array:

  • determine the alignment of the member type and lets name it align_member
  • the alignment of the array is maximum(align_member, 16)

Struct:

  • determine the member with the largest alignment and lets name it max_member_align
  • the alignment of the array is maximum(max_member_align, 16)

# crates to make your struct compatible with std140

glsl_layout crevice

# std430 (since GLSL 4.3, OpenGL 4.3)

more space efficient for structs and arrays

Array

  • alignment is the alignment of the element type

Struct

  • alignment is the alignment of the member with the largest alignment

# crates to make yuor struct compatible with std430

glsl_layout issue crevice issue

Last Updated: 11/21/2020, 8:16:07 PM

← →

- + diff --git a/showcase/compute/index.html b/showcase/compute/index.html index 747b9732..b214cf47 100644 --- a/showcase/compute/index.html +++ b/showcase/compute/index.html @@ -8,7 +8,7 @@ - + @@ -122,6 +122,6 @@ →

- + diff --git a/showcase/gifs/index.html b/showcase/gifs/index.html index c1251acc..f96a4555 100644 --- a/showcase/gifs/index.html +++ b/showcase/gifs/index.html @@ -8,7 +8,7 @@ - + @@ -149,6 +149,6 @@ →

- + diff --git a/showcase/imgui-demo/index.html b/showcase/imgui-demo/index.html index 6beef110..be7f5ed7 100644 --- a/showcase/imgui-demo/index.html +++ b/showcase/imgui-demo/index.html @@ -8,7 +8,7 @@ - + @@ -115,6 +115,6 @@ display.queue - + diff --git a/showcase/index.html b/showcase/index.html index bbe99363..422a8022 100644 --- a/showcase/index.html +++ b/showcase/index.html @@ -7,12 +7,12 @@ - - + + -
Learn Wgpu

# Foreward

The articles in this section are not meant to be tutorials. They are showcases of the various things you can do with wgpu. I won't go over specifics of creating wgpu resources, as those will be covered elsewhere. The code for these examples is still available however, and will be accessible on Github.

Last Updated: 11/24/2020, 6:30:37 AM

+

Learn Wgpu

# Foreward

The articles in this section are not meant to be tutorials. They are showcases of the various things you can do with wgpu. I won't go over specifics of creating wgpu resources, as those will be covered elsewhere. The code for these examples is still available however, and will be accessible on Github.

Last Updated: 10/6/2020, 3:28:01 AM

← →

- + diff --git a/showcase/pong/index.html b/showcase/pong/index.html index e246030a..5579a195 100644 --- a/showcase/pong/index.html +++ b/showcase/pong/index.html @@ -8,7 +8,7 @@ - + @@ -205,6 +205,6 @@ →

- + diff --git a/showcase/windowless/index.html b/showcase/windowless/index.html index 23249c5c..bb9e8180 100644 --- a/showcase/windowless/index.html +++ b/showcase/windowless/index.html @@ -8,7 +8,7 @@ - + @@ -228,6 +228,6 @@ output_buffer. - + diff --git a/todo.html b/todo.html index 95e3aa24..d563380b 100644 --- a/todo.html +++ b/todo.html @@ -7,12 +7,12 @@ - - + + - - + +