Added slang shaders for additional samples

shaders/slang/radialblur/phongpass.slang

@@ -0,0 +1,67 @@
+/* Copyright (c) 2025, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+struct VSInput
+{
+    float4 Pos;
+    float2 UV;
+    float3 Color;
+    float3 Normal;
+};
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+    float3 Normal;
+    float3 Color;
+    float3 EyePos;
+    float3 LightVec;
+    float2 UV;
+};
+
+struct UBO
+{
+    float4x4 projection;
+    float4x4 model;
+    float gradientPos;
+};
+ConstantBuffer<UBO> ubo;
+
+Sampler2D samplerGradientRamp;
+
+[shader("vertex")]
+VSOutput vertexMain(VSInput input)
+{
+    VSOutput output;
+    output.Normal = input.Normal;
+    output.Color = input.Color;
+    output.UV = float2(ubo.gradientPos, 0.0);
+    output.Pos = mul(ubo.projection, mul(ubo.model, input.Pos));
+    output.EyePos = mul(ubo.model, input.Pos).xyz;
+    float4 lightPos = float4(0.0, 0.0, -5.0, 1.0); // * ubo.model;
+    output.LightVec = normalize(lightPos.xyz - input.Pos.xyz);
+    return output;
+}
+
+[shader("fragment")]
+float4 fragmentMain(VSOutput input)
+{
+	// No light calculations for glow color
+	// Use max. color channel value
+	// to detect bright glow emitters
+	if ((input.Color.r >= 0.9) || (input.Color.g >= 0.9) || (input.Color.b >= 0.9))
+    {
+        return float4(samplerGradientRamp.Sample(input.UV).rgb, 1);
+	} else {
+		float3 Eye = normalize(-input.EyePos);
+		float3 Reflected = normalize(reflect(-input.LightVec, input.Normal));
+		float4 IAmbient = float4(0.2, 0.2, 0.2, 1.0);
+		float4 IDiffuse = float4(0.5, 0.5, 0.5, 0.5) * max(dot(input.Normal, input.LightVec), 0.0);
+		float specular = 0.25;
+		float4 ISpecular = float4(0.5, 0.5, 0.5, 1.0) * pow(max(dot(Reflected, Eye), 0.0), 4.0) * specular;
+		return float4((IAmbient + IDiffuse) * float4(input.Color, 1.0) + ISpecular);
+	}
+}