Merge pull request #2099 from jim-ec/master

Compute vertex positions in the shader

1 files changed, 7 insertions, 0 deletions

diff --git a/wgpu/src/shader/vertex.wgsl b/wgpu/src/shader/vertex.wgsl
new file mode 100644
index 00000000..e6af6fc0
--- /dev/null
+++ b/wgpu/src/shader/vertex.wgsl
@@ -0,0 +1,7 @@
+// Compute the normalized quad coordinates based on the vertex index.
+fn vertex_position(vertex_index: u32) -> vec2<f32> {
+    // #: 0 1 2 3 4 5
+    // x: 1 1 0 0 0 1
+    // y: 1 0 0 0 1 1
+    return vec2<f32>((vec2(1u, 2u) + vertex_index) % vec2(6u) < vec2(3u));
+}