Initial commit

data/shaders/dx11/rain_snow.vertex.hlsl

@@ -0,0 +1,81 @@
+#include "ShaderConstants.fxh"
+
+struct VS_Input {
+	float3 position : POSITION;
+	float2 uv0 : TEXCOORD_0;
+	float4 color : COLOR;
+#ifdef INSTANCEDSTEREO
+	uint instanceID : SV_InstanceID;
+#endif
+};
+
+struct PS_Input {
+	float4 position : SV_Position;
+	float2 uv : TEXCOORD_0;
+	float4 color : COLOR;
+	float4 worldPosition : TEXCOORD_1;
+	float4 fogColor : FOG_COLOR;
+#ifdef INSTANCEDSTEREO
+	uint instanceID : SV_InstanceID;
+#endif
+};
+
+void main(in VS_Input VSInput, out PS_Input PSInput)
+{
+	float spriteSelector = VSInput.color.x*255.0f;
+	PSInput.uv = UV_INFO.xy + (VSInput.uv0 * UV_INFO.zw);
+	PSInput.uv.x += spriteSelector * UV_INFO.z;
+
+	float3 position = VSInput.position.xyz;
+		
+	// subtract the offset then fmod into (0.0f, PARTICLE_BOX)
+	position.xyz += POSITION_OFFSET.xyz;
+	position.xyz = fmod(position.xyz, PARTICLE_BOX.xxx);
+	
+	// centre box on origin
+	position.xyz -= PARTICLE_BOX.xxx * 0.5f;
+	
+	// push along view vector so box is positioned more infront of camera
+	position.xyz += FORWARD.xyz;
+	
+	// get world position
+	float4 worldPositionBottom = float4(position.xyz, 1.0f);
+	float4 worldPositionTop = float4(worldPositionBottom.xyz + (VELOCITY.xyz * SIZE_SCALE.y), 1.0f);
+
+	// get projected positions of top and bottom of particle, and top of particle in previous frame
+#ifdef INSTANCEDSTEREO
+	int i = VSInput.instanceID;
+	float4 bottom = mul(WORLDVIEWPROJ_STEREO[i], worldPositionBottom);
+	float4 top = mul(WORLDVIEWPROJ_STEREO[i], worldPositionTop);
+	PSInput.instanceID = i;
+#else
+	float4 bottom = mul(WORLDVIEWPROJ, worldPositionBottom);
+	float4 top = mul(WORLDVIEWPROJ, worldPositionTop);
+#endif
+	// get 2d vector in screenspace between top and bottom of particle
+	float2 dir = (top.xy/top.w) - (bottom.xy/bottom.w);
+	
+	// get 2d vector perpendicular to velocity
+	float2 dirPerp = normalize(float2(-dir.y, dir.x));
+
+	// choose either the top or bottom projected position using uv.y
+	PSInput.position = lerp(top, bottom, VSInput.uv0.y);
+	 	
+	// offset the position of each side of the particle using uv.x 
+	PSInput.position.xy += (0.5f - VSInput.uv0.x) * dirPerp * SIZE_SCALE.x;
+	
+	// get the final colour including the lighting, distance and length scales, and per instance alpha
+	PSInput.color = ALPHA;
+
+	//fog
+	PSInput.fogColor.rgb = FOG_COLOR.rgb;
+	PSInput.fogColor.a = clamp(((PSInput.position.z / RENDER_DISTANCE) - FOG_CONTROL.x) / (FOG_CONTROL.y - FOG_CONTROL.x), 0.0, 1.0);
+
+	worldPositionBottom.xz *= 1.0f / 64.0f;	// Scale by 1/TextureDimensions to get values between
+	worldPositionBottom.xz += 0.5f;			// Offset so that center of view is in the center of occlusion texture
+	worldPositionBottom.y += VIEW_POSITION.y - 0.5f;
+	worldPositionBottom.y *= 1.0f / 255.0f;
+	PSInput.worldPosition = worldPositionBottom;
+}
+
+