feat: RHI interface with shared scene and black hole renderers

3 files changed, 48 insertions, 37 deletions

diff --git a/assets/shaders/grid.slang b/assets/shaders/grid.slang
index ea7d263..d90799e 100644
--- a/assets/shaders/grid.slang
+++ b/assets/shaders/grid.slang
@@ -1,6 +1,13 @@
-uniform float4x4 u_ViewProjection;
-uniform float4x4 u_Transform;
-uniform float    u_GridSize;
+struct GridU
+{
+    float4x4 u_ViewProjection;
+    float4x4 u_Transform;
+    float    u_GridSize;
+    float3   u_GridColor;
+    float    u_GridAlpha;
+    float3   u_CameraPos;
+};
+ConstantBuffer<GridU> gu;
 
 struct VSInput  { float3 position : POSITION; };
 struct VSOutput { float4 position : SV_Position; };
@@ -9,23 +16,19 @@ struct VSOutput { float4 position : SV_Position; };
 VSOutput vertexMain(VSInput input)
 {
     VSOutput output;
-    float3 scaledPosition = input.position * (u_GridSize / 50.0);
-    output.position = mul(u_ViewProjection, mul(u_Transform, float4(scaledPosition, 1.0)));
+    float3 scaledPosition = input.position * (gu.u_GridSize / 50.0);
+    output.position = mul(gu.u_ViewProjection, mul(gu.u_Transform, float4(scaledPosition, 1.0)));
     return output;
 }
 
-uniform float3 u_GridColor;
-uniform float  u_GridAlpha;
-uniform float3 u_CameraPos;
-
 [shader("fragment")]
 float4 fragmentMain(VSOutput input) : SV_Target
 {
-    float dist       = length(u_CameraPos);
+    float dist       = length(gu.u_CameraPos);
     float fadeFactor = 1.0 - clamp(dist / 100.0, 0.0, 0.8);
 
-    float3 color = u_GridColor;
-    float  alpha = u_GridAlpha * fadeFactor;
+    float3 color = gu.u_GridColor;
+    float  alpha = gu.u_GridAlpha * fadeFactor;
 
     float gridFade = 1.0 - clamp(dist / 50.0, 0.0, 0.9);
     alpha *= gridFade;
diff --git a/assets/shaders/skybox.slang b/assets/shaders/skybox.slang
index cffffcd..b7e5de8 100644
--- a/assets/shaders/skybox.slang
+++ b/assets/shaders/skybox.slang
@@ -1,5 +1,9 @@
-uniform float4x4 u_Projection;
-uniform float4x4 u_View;
+struct SkyboxU
+{
+    float4x4 u_Projection;
+    float4x4 u_View;
+};
+ConstantBuffer<SkyboxU> sb;
 
 struct VSInput  { float3 position : POSITION; };
 struct VSOutput { float4 position : SV_Position; float3 texCoords : TEXCOORD0; };
@@ -9,7 +13,7 @@ VSOutput vertexMain(VSInput input)
 {
     VSOutput output;
     output.texCoords = input.position;
-    float4 pos = mul(u_Projection, mul(u_View, float4(input.position, 1.0)));
+    float4 pos = mul(sb.u_Projection, mul(sb.u_View, float4(input.position, 1.0)));
     output.position = pos.xyww;
     return output;
 }
diff --git a/assets/shaders/sphere.slang b/assets/shaders/sphere.slang
index 0871438..256372d 100644
--- a/assets/shaders/sphere.slang
+++ b/assets/shaders/sphere.slang
@@ -1,5 +1,17 @@
-uniform float4x4 u_ViewProjection;
-uniform float4x4 u_Transform;
+struct SphereU
+{
+    float4x4 u_ViewProjection;
+    float4x4 u_Transform;
+    float3   u_Color;
+    float    u_Specular;
+    float    u_Emission;
+    float3   u_LightPos;
+    float3   u_CameraPos;
+    int      u_IsSelected;
+    float3   u_OutlineColor;
+    float    u_OutlineWidth;
+};
+ConstantBuffer<SphereU> su;
 
 struct VSInput
 {
@@ -18,29 +30,21 @@ struct VSOutput
 VSOutput vertexMain(VSInput input)
 {
     VSOutput output;
-    output.worldPos = mul(u_Transform, float4(input.position, 1.0)).xyz;
-    float3x3 normalMatrix = (float3x3)u_Transform;
+    output.worldPos = mul(su.u_Transform, float4(input.position, 1.0)).xyz;
+    float3x3 normalMatrix = (float3x3)su.u_Transform;
     output.normal   = mul(normalMatrix, input.normal);
-    output.position = mul(u_ViewProjection, float4(output.worldPos, 1.0));
+    output.position = mul(su.u_ViewProjection, float4(output.worldPos, 1.0));
     return output;
 }
 
-uniform float3 u_Color;
-uniform float  u_Specular;
-uniform float  u_Emission;
-uniform float3 u_LightPos;
-uniform float3 u_CameraPos;
-uniform int    u_IsSelected;
-uniform float3 u_OutlineColor;
-uniform float  u_OutlineWidth;
-SamplerCube    u_HDRIEnvironment;
+SamplerCube u_HDRIEnvironment;
 
 [shader("fragment")]
 float4 fragmentMain(VSOutput input) : SV_Target
 {
     float3 normal     = normalize(input.normal);
-    float3 lightDir   = normalize(u_LightPos - input.worldPos);
-    float3 viewDir    = normalize(u_CameraPos - input.worldPos);
+    float3 lightDir   = normalize(su.u_LightPos - input.worldPos);
+    float3 viewDir    = normalize(su.u_CameraPos - input.worldPos);
     float3 reflectDir = reflect(-lightDir, normal);
 
     float3 hdriLight     = u_HDRIEnvironment.Sample(normal).rgb;
@@ -49,18 +53,18 @@ float4 fragmentMain(VSOutput input) : SV_Target
     float diff = max(dot(normal, lightDir), 0.0);
     float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32.0);
 
-    float3 diffuse  = u_Color * (diff + hdriIntensity * hdriLight);
-    float3 specular = float3(u_Specular, u_Specular, u_Specular) * spec;
-    float3 emission = u_Color * u_Emission;
+    float3 diffuse  = su.u_Color * (diff + hdriIntensity * hdriLight);
+    float3 specular = float3(su.u_Specular, su.u_Specular, su.u_Specular) * spec;
+    float3 emission = su.u_Color * su.u_Emission;
 
     float3 result = diffuse + specular + emission;
 
-    if (u_IsSelected > 0)
+    if (su.u_IsSelected > 0)
     {
         float ndotv       = max(dot(normal, viewDir), 0.0);
         float rim         = 1.0 - ndotv;
-        float outlineMask = step(1.0 - u_OutlineWidth, rim);
-        result = lerp(result, u_OutlineColor, outlineMask);
+        float outlineMask = step(1.0 - su.u_OutlineWidth, rim);
+        result = lerp(result, su.u_OutlineColor, outlineMask);
     }
 
     return float4(result, 1.0);