water shader headaches

(damocles) #1

I’m making a water shader similar too (aka ripped off from) the battery water shader. I have terrain also to create the foamy parts and I added a second terrain texture that is transparent so that the water seems to fade away into the fog. Problem is, it’s fading in the wrong direction:

http://homepage.ntlworld.com/dave88/water.jpg

And here is the sahder causing the grief:

textures/water1/terrain_0
{
	q3map_baseshader textures/water1/terrain_base
	cull none
	deformVertexes wave 1317 sin 0 15 0 0.15
 	deformVertexes wave 317 sin 0 10 0 0.30
	
	{
		map textures/liquids_sd/seawall_specular.tga
		blendFunc GL_ONE GL_ONE
		rgbGen vertex
		tcGen environment
		depthWrite
		tcMod scale 0.063 0.063
	}
		
	{ 
		map textures/liquids_sd/sea_bright_na.tga
		blendFunc blend
		rgbGen identity
		//alphaGen const 0.8
		tcMod scale 0.063 0.063
		tcmod scroll 0.005 0.03
	}
}

textures/water1/terrain_1
{
	q3map_baseshader textures/water1/terrain_base
	cull none
	deformVertexes wave 1317 sin 0 15 0 0.15
 	deformVertexes wave 317 sin 0 10 0 0.30
	
	{
		map textures/liquids_sd/seawall_specular.tga
		blendFunc GL_ONE GL_ONE
		rgbGen vertex
		tcMod scale 0.063 0.063
		tcGen environment
		depthWrite
	}
	
	{ 
		map textures/liquids_sd/sea_bright_na.tga
		blendFunc blend
		rgbGen identity
		//alphaGen const .8
		tcMod scale 0.063 0.063
		tcmod scroll 0.005 0.03
	}
	{
		map textures/liquids_sd/seawall_foam.tga
		blendFunc GL_SRC_ALPHA GL_ONE
		rgbGen wave sin 0.2 0.1 0 0.2
		alphaGen vertex
		tcMod scale 0.063 0.063
		tcMod turb 0 0.05 0 0.15
		tcmod scroll -0.01 0.08
	}
	{ 
		map textures/liquids_sd/seawall_foam.tga
		blendFunc GL_SRC_ALPHA GL_ONE
		rgbGen wave sin 0.15 0.1 0.1 0.15
		alphaGen vertex
		tcMod scale 0.063 0.063
		tcMod turb 0 0.05 0.5 0.15
		tcmod scroll 0.01 0.09
	}
}

textures/water1/terrain_2
{
	q3map_baseshader textures/water1/terrain_base
	cull none
		
	{ 
		map textures/mp_subpen/empty.tga
		blendFunc blend
		rgbGen identity
		tcMod scale 0.063 0.063
	}
}

textures/water1/terrain_0to1
{
	q3map_baseshader textures/water1/terrain_base
	cull none
	deformVertexes wave 1317 sin 0 15 0 0.15
 	deformVertexes wave 317 sin 0 10 0 0.30 	
	
	{
		map textures/liquids_sd/seawall_specular.tga
		blendFunc GL_ONE GL_ONE
		rgbGen vertex
		tcGen environment
		tcMod scale 0.063 0.063
		depthWrite
	}
	
	{ 
		map textures/liquids_sd/sea_bright_na.tga
		blendFunc blend
		//rgbGen identity
		//alphaGen const .8
		tcMod scale 0.063 0.063
		tcmod scroll 0.005 0.03
	}
	{
		map textures/liquids_sd/seawall_foam.tga
		blendFunc GL_SRC_ALPHA GL_ONE
		rgbGen wave sin 0.2 0.1 0 0.2
		alphaGen vertex
		tcMod turb 0 0.05 0 0.15
		tcMod scale 0.063 0.063
		tcmod scroll -0.01 0.08
	}
	{ 
		map textures/liquids_sd/seawall_foam.tga
		blendFunc GL_SRC_ALPHA GL_ONE
		rgbGen wave sin 0.15 0.1 0.1 0.15
		alphaGen vertex
		tcMod turb 0 0.05 0.5 0.15
		tcMod scale 0.063 0.063
		tcmod scroll 0.01 0.09
	}
}

textures/water1/terrain_0to2
{
	q3map_baseshader textures/water1/terrain_base
	deformVertexes wave 1317 sin 0 15 0 0.15
 	deformVertexes wave 317 sin 0 10 0 0.30 
	{
		map textures/liquids_sd/seawall_specular.tga
		blendFunc GL_ONE GL_ONE
		rgbGen vertex
		tcGen environment
		alphaGen vertex
		tcMod scale 0.063 0.063
		depthWrite
	}
	
	{ 
		map textures/liquids_sd/sea_bright_na.tga
		blendFunc blend
		//rgbGen identity
		//alphaGen const .8
		alphaGen vertex
		tcMod scale 0.063 0.063
		tcmod scroll 0.005 0.03
	}
	{
		map textures/mp_subpen/empty.tga
		blendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA
		//alphaGen vertex
		tcMod scale 0.063 0.125
	}
	{
		map $lightmap
		blendFunc GL_DST_COLOR GL_ZERO
	}
}

textures/water1/terrain_1to2
{
	q3map_baseshader textures/water1/terrain_base
	deformVertexes wave 1317 sin 0 15 0 0.15
 	deformVertexes wave 317 sin 0 10 0 0.30 

	{
		map textures/subpen/empty.tga
		//alphagen const 0.0
		//tcMod scale 0.063 0.063
	}
	{
		map textures/liquids_sd/sea_bright_na.tga
		blendFunc GL_SRC_ALPHA GL_ONE
		rgbGen wave sin 0.2 0.1 0 0.2
		alphaGen vertex
		tcMod turb 0 0.05 0 0.15
		tcmod scroll -0.01 0.08
		tcMod scale 0.063 0.063
	}
	{ 
		map textures/liquids_sd/sea_bright_na.tga
		blendFunc GL_SRC_ALPHA GL_ONE
		rgbGen wave sin 0.15 0.1 0.1 0.15
		alphaGen vertex
		tcMod turb 0 0.05 0.5 0.15
		tcmod scroll 0.01 0.09
		tcMod scale 0.063 0.063
	}
}

textures/water1/terrain_base
{
	qer_editorimage textures/liquids_sd/seawall_ocean.tga
	qer_trans 0.5
	q3map_tcGen ivector ( 512 0 0 ) ( 0 512 0 )
	//tcMod scale 0.063 0.063
	q3map_globalTexture
	surfaceparm nonsolid
	surfaceparm trans
	surfaceparm nomarks
	surfaceparm lightfilter
	surfaceparm pointlight
	nopicmip
}

I know it’s a mess and got other problems besides the vertx alpha problem.

Anyway, the terrain0to2 is the shader at fault. And it seems to me, no matter how I edit the shader, I cannot get the blending to be performed the other direction. Is this even possible or am I going to have to remake the shader and alphamap to make it blend in the right direction?

(chavo_one) #2

Shot in the dark…

Can you give “tcmod scale” negative values, and if so does it reverse the fade?

(ydnar) #3

You don’t need to go through that rigamarole to get it to fade out into the fog. Just use fog. :slight_smile:

Alternatively you could just have an additional terrain layer that’s nodraw, and use the blend shaders to achieve the same effect via vertex alpha.

y

(damocles) #4

That’s what I was trying to do in the first place - have the vertex alpha fade it away, but the vertex fade was going in the wrong direction.

Doesn’t matter now - I returned to tried and tested methods - I made a haze effect shader and stuck at the back of the sea :slight_smile: