Initial commit

data/shaders/dx11/rain_snow.fragment.hlsl

@@ -0,0 +1,39 @@
+#include "ShaderConstants.fxh"
+
+struct PS_Input {
+	float4 position : SV_Position;
+	float2 uv : TEXCOORD_0;
+	float4 color : COLOR;
+	float4 worldPosition : TEXCOORD_1;
+	float4 fogColor : FOG_COLOR;
+};
+
+struct PS_Output {
+	float4 color : SV_Target;
+};
+
+void main( in PS_Input PSInput, out PS_Output PSOutput ) {
+	
+	PSOutput.color = TEXTURE_0.Sample(TextureSampler0, PSInput.uv);
+
+	PSOutput.color.a *= PSInput.color.a;
+
+	float2 uv = PSInput.worldPosition.xz;
+	float4 occlusionTexture = TEXTURE_1.Sample(TextureSampler1, uv);
+
+	// clamp the uvs
+	if (uv.x >= 0.0f && uv.x <= 1.0f && 
+		uv.y >= 0.0f && uv.y <= 1.0f && 
+		PSInput.worldPosition.y < occlusionTexture.a) {
+		PSOutput.color.a = 0.0f;
+	}
+
+	float mixAmount = saturate((PSInput.worldPosition.y - occlusionTexture.a)*10.0f);
+	float3 lighting = lerp(occlusionTexture.rgb, PSInput.color.rgb, mixAmount);
+	PSOutput.color.rgb *= lighting.rgb;
+
+	//apply fog
+	PSOutput.color.rgb = lerp(PSOutput.color.rgb, PSInput.fogColor.rgb, PSInput.fogColor.a);
+}
+
+