From 3fd33ecff7472e4d6fc9e6b3905f56982e497ef2 Mon Sep 17 00:00:00 2001 From: hachem Date: Sun, 23 Aug 2026 17:21:37 +0200 Subject: [feat]: complete RHI api --- assets/shaders/equirect_to_cubemap.slang | 33 ++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 assets/shaders/equirect_to_cubemap.slang (limited to 'assets/shaders/equirect_to_cubemap.slang') diff --git a/assets/shaders/equirect_to_cubemap.slang b/assets/shaders/equirect_to_cubemap.slang new file mode 100644 index 0000000..9b2ea4b --- /dev/null +++ b/assets/shaders/equirect_to_cubemap.slang @@ -0,0 +1,33 @@ +uniform float4x4 u_Projection; +uniform float4x4 u_View; + +struct VSInput { float3 position : POSITION; }; +struct VSOutput { float4 position : SV_Position; float3 worldPos : TEXCOORD0; }; + +[shader("vertex")] +VSOutput vertexMain(VSInput input) +{ + VSOutput output; + output.worldPos = input.position; + output.position = mul(u_Projection, mul(u_View, float4(input.position, 1.0))); + return output; +} + +Sampler2D u_EquirectangularMap; +static const float2 invAtan = float2(0.1591, 0.3183); + +float2 SampleSphericalMap(float3 v) +{ + float2 uv = float2(atan2(v.z, v.x), asin(v.y)); + uv *= invAtan; + uv += 0.5; + return uv; +} + +[shader("fragment")] +float4 fragmentMain(VSOutput input) : SV_Target +{ + float2 uv = SampleSphericalMap(normalize(input.worldPos)); + float3 color = u_EquirectangularMap.Sample(uv).rgb; + return float4(color, 1.0); +} -- cgit v1.3