Terrain MultiTex

From GameStudio Wiki

matrix matMtl;

texture mtlSkin1; // Blending map for Pass P1
texture mtlSkin2; // Blending map for Pass P2
texture mtlSkin3; // The Shadow map
texture entSkin1; // Tileable Tex (ie, Grass)
texture entSkin2; // Tileable Tex (ie, Sand)
texture entSkin3; // Tileable Tex (ie, Shale)

technique ffp_terrain_shadow{
	pass P0{
		// Lets lay the first texture down. no alpha work
		AlphaBlendEnable = False;
		AlphaTestEnable = False;
		ZEnable = True;
		ZWriteEnable = True;

		// Stage 0
		Texture[0] = <entSkin1>;
		MagFilter[0] = Linear;
		MinFilter[0] = Linear;
		MipFilter[0] = Linear;
		TextureTransformFlags[0] = Count2;

		// Adjust The UV Tiling Scale here
		TextureTransform[0] = <matMtl>;
		texcoordindex[0] = 0;
		ColorArg1[0] = Texture;
		ColorOp[0] = selectarg1;
		AlphaOp[0] = Disable;

		//stage 1
		ColorOp[1] = Disable;
		AlphaOp[1] = Disable;
	}
	pass P1{
		// Now we blend another texture using an alphamap
		// Stage 0
		// We need to enable alphablending
		AlphaBlendEnable = True;
		SrcBlend = SrcAlpha;
		DestBlend = InvSrcAlpha;

		// AlphaTestEnable uses the AlphaRef and AlphaFunc to
		// determine which pixels get drawn.
		// In this case, anything greater that 0 will be drawn.
		AlphaTestEnable = True;
		AlphaRef = 0x00000000; //Reference Value
		AlphaFunc = Greater; //Comparison Function
		ZEnable = False;
		ZWriteEnable = False;
		Texture[0] = <mtlSkin1>;
		MagFilter[0] = Linear;
		MinFilter[0] = Linear;
		MipFilter[0] = Linear;

		// We don't want the alphamap to tile
		TextureTransformFlags[0] = Disable;
		TexCoordIndex[0] = 0;
		ColorArg1[0] = Current;
		ColorOp[0] = SelectArg1;
		AlphaArg1[0] = Texture | AlphaReplicate;
		AlphaOp[0] = SelectArg1;

		// Stage 1
		Texture[1] = <entSkin2>;

		// Zenable is supposed to default to true.
		// This enables depth testing to determine what pixels
		// are visible to the viewer
		ZEnable = True;
		ZWriteEnable = True;
		MagFilter[1] = Linear;
		MinFilter[1] = Linear;
		MipFilter[1] = Linear;
		TextureTransformFlags[1] = Count2;

		// Adjust The UV Tiling Scale here
		TextureTransform[1] = <matMtl>;
		TexCoordIndex[1] = 1;
		ColorArg1[1] = Texture;
		ColorOp[1] = Modulate;
		AlphaArg1[1] = Current | AlphaReplicate;
		AlphaOp[1] = Disable;

		// Stage 2
		ColorOp[2] = Disable;
		AlphaOp[2] = Disable;
	}
	pass P2{
		// A ditto of Pass p1 but with different a different texture and alphamap
		// Stage 0
		AlphaBlendEnable = True;
		SrcBlend = SrcAlpha;
		DestBlend = InvSrcAlpha;
		AlphaTestEnable = True;
		AlphaRef = 0x00000000;
		AlphaFunc = Greater;
		Texture[0] = <mtlSkin2>;
		ZEnable = True;
		ZWriteEnable = True;
		MagFilter[0] = Linear;
		MinFilter[0] = Linear;
		MipFilter[0] = Linear;
		TextureTransformFlags[0] = Disable;
		TexCoordIndex[0] = 1;
		ColorArg1[0] = Current;
		ColorOp[0] = SelectArg1;
		AlphaArg1[0] = Texture | AlphaReplicate;
		AlphaOp[0] = SelectArg1;

		// Stage 1
		Texture[1] = <entSkin3>;
		ZEnable = True;
		ZWriteEnable = True;
		MagFilter[1] = Linear;
		MinFilter[1] = Linear;
		MipFilter[1] = Linear;
		TextureTransformFlags[1] = Count2;

		// Adjust The UV Tiling Scale here
		TextureTransform[1] = matMtl>;
		TexCoordIndex[1] = 0;
		ColorArg1[1] = Texture;
		ColorOp[1] = Modulate;
		AlphaArg1[1] = Current | AlphaReplicate;
		AlphaOp[1] = Disable;

		// Stage 2
		ColorOp[2] = Disable;
		AlphaOp[2] = Disable;
	} // End of Pass P2
	Pass p3{
		// Lets do some lighting and shadows
		AlphaBlendEnable = True;
		SrcBlend = Zero;
		DestBlend = SrcColor;
		ZEnable = True;
		ZWriteEnable = True;
		DitherEnable = True;

		// Stage 0 - Lighting
		ColorArg1[0] = Diffuse;
		ColorOp[0] = Modulate2x;
		ColorArg2[0] = Current;
		AlphaOp[0]=Disable;

		// Stage 1 - Lighting
		Texture[1] = <mtlSkin3>;
		MagFilter[1] = Linear;
		MinFilter[1] = Linear;
		MipFilter[1] = Linear;
		ColorArg1[1] = Texture;
		ColorOp[1] = Modulate2x;
		TextureTransformFlags[1] = Disable;
		TexCoordIndex[1] = 1;
	} // End of Pass P3
} // End of Technique

technique fallback { pass p0 { } } // empty fallback causes normal rendering without effect