HLSL shader hints

Posted By: jcl

HLSL shader hints - 11/16/04 03:47

I've put some general information about how to use sun light, dynamic lights, and fog in HLSL shaders on the Wiki:

http://www.conitecserver.com/wiki/index.php/ShaderHints

Posted By: Steempipe

Re: HLSL shader hints - 11/16/04 05:30

Thanks. Useful stuff.

Posted By: jcl

Re: HLSL shader hints - 11/16/04 06:15

This is a template script as an example how to do a shader with dynamic lights, using the terrain multitexture shader concept by you and ventilator. It mixes three textures plus a shadow map, according to the red, green, and blue channels of the first terrain skin.

http://server.conitec.net/down/mtlterrainmulti.wdl

A6.31.3 is required for running the script. At the moment the 8 dynamic lights must be set manually by a script or in the shader code. In the next update, the engine will pass the light positions and colors directly to the shaders.

Posted By: Steempipe

Re: HLSL shader hints - 11/16/04 10:22

Runs smooth and fast. Easy to implement.

Thanks.. this is a very good template. Now for the experimenting!

Posted By: Matt_Aufderheide

Re: HLSL shader hints - 11/16/04 11:41

Quote:

In the next update, the engine will pass the light positions and colors directly to the shaders.

is this what i think it is? awsome!!

Posted By: Steempipe

Re: HLSL shader hints - 11/16/04 12:19

Here's _one_ way to modify the code to put light constants in:

Code:


        // preset this with light positions (xyz) and ranges (w)
	const float4 vecLightPos[8]= {
					-327,650,470,400, 
					-893,607,400,400,
					62,703,417,800,
					0,0,0,0,
					0,0,0,0,
					0,0,0,0,
					0,0,0,0,
					0,0,0,0};
	 
	// preset this with light colors
	const float4 vecLightColor[8]= {
                                        1,0,0,1, //Red
					0,1,0,1, //Green
					0,0,1,1, //Blue
					0,0,0,0,
					0,0,0,0,
					0,0,0,0,
					0,0,0,0,
					0,0,0,0};

Posted By: Patrick_Star

Re: HLSL shader hints - 01/07/05 15:05

Quick question. How would you implement fog into this? Currently I've had no luck in getting this to work. TIA.

Posted By: Steempipe

Re: HLSL shader hints - 01/07/05 17:32

There was a brief discussion on fog here:
web page

And you can see it in a complete code here:
web page

Posted By: Patrick_Star

Re: HLSL shader hints - 01/07/05 17:39

Ah many thanks for pointing those posts out. All is working well now.

Posted By: Darkstorm

Re: HLSL shader hints - 01/10/05 15:23

Hey quick question. Any idea why is it that when I try to use mtlSkin instead of entSkin on the sencond and third texture skin I get a strange black "fog" over the HMP? The textures are there but there is almost a fog-of-war thing going on

Posted By: Darkstorm

Re: HLSL shader hints - 01/12/05 06:23

Anyone have any insight on this? If a screenshot would help let me know and I'll post one.

Posted By: Rhuarc

Re: HLSL shader hints - 01/12/05 06:35

Screenshot would be good, also what GPU this is being rendered on...

Posted By: Darkstorm

Re: HLSL shader hints - 01/12/05 17:39

Okay here's a shot of what I'm talking about:

The code that I added is this:

Code:


bmap grassmap = <grass001.bmp>;
bmap dirtmap = <dirt001.bmp>;

function mtl_terrainmulti3_init()
{
	bmap_to_mipmap(mtl.skin2);
	bmap_to_mipmap(mtl.skin3);
}


MATERIAL mtl_terrainmulti3
{
	skin2 = grassmap;
	skin3 = dirtmap;
	
	event = mtl_terrainmulti3_init;
	
	effect = "

........

And I canged the two skins from entSkin to mtlSkin:

Code:


sampler sMaskTex = sampler_state
	{
		Texture = <entSkin1>;
		MipFilter = LINEAR;
		MinFilter = LINEAR;
		MagFilter = LINEAR;
		AddressU = Wrap;
		Addressv = Wrap;
	};

	sampler sBaseTex = sampler_state
	{
		Texture = <mtlSkin2>;
		MipFilter = LINEAR;
		MinFilter = LINEAR;
		MagFilter = LINEAR;
		AddressU = Wrap;
		Addressv = Wrap;
	};

	sampler sRedTex = sampler_state
	{
		Texture = <mtlSkin3>;
		MipFilter = LINEAR;
		MinFilter = LINEAR;
		MagFilter = LINEAR;
		AddressU = Wrap;
		Addressv = Wrap;
	};

#ifdef GREENMASK
	sampler sGreenTex = sampler_state
	{
		Texture = <entSkin4>;
		MipFilter = LINEAR;
		MinFilter = LINEAR;
		MagFilter = LINEAR;
		AddressU = Wrap;
		Addressv = Wrap;
	};
#endif

The entSkins are working as they should but the mtlSkins have that blacked out look.