1 files changed, 23 insertions, 0 deletions
diff --git a/assets/shaders/Skybox.slang b/assets/shaders/Skybox.slang
new file mode 100644
index 0000000..6ba81bc
--- /dev/null
+++ b/assets/shaders/Skybox.slang
@@ -0,0 +1,23 @@
+uniform float4x4 u_Projection;
+uniform float4x4 u_View;
+
+struct VSInput  { float3 position : POSITION; };
+struct VSOutput { float4 position : SV_Position; float3 texCoords : TEXCOORD0; };
+
+[shader("vertex")]
+VSOutput vertexMain(VSInput input)
+{
+    VSOutput output;
+    output.texCoords = input.position;
+    float4 pos = mul(u_Projection, mul(u_View, float4(input.position, 1.0)));
+    output.position = pos.xyww;   // force depth = 1 so the skybox stays behind everything
+    return output;
+}
+
+SamplerCube u_Skybox;
+
+[shader("fragment")]
+float4 fragmentMain(VSOutput input) : SV_Target
+{
+    return u_Skybox.Sample(input.texCoords);
+}