Scratched Film

From GameStudio Wiki

Lite-C:

---

Material and function to adjust the effect:

//Scrached Film
BMAP* Noise2_bmap = "noise1.jpg";
MATERIAL* ScrachedFilm_mat =
{
	skin1 = Noise2_bmap;
	effect = "ScrachedFilm.fx";
}

function ScrachedFilm_set_Value(SideScrollSpeed)
{
	ScrachedFilm_mat.skill1 = floatv(SideScrollSpeed);	//usually a small value like 0.01
}

The ScrachedFilm.fx file:

//////////////////////////////////////////////////////////
////Scrached Film Effect from the Nvidia Shaderlibrary////
//////////////////////////////////////////////////////////

float4 vecSkill1;	//Side Scroll Speed
float4 vecTime;

float Speed = 10.0f;	//Speed (Slower=Longer Scratches)
//float Speed2 = 0.005f;	//Side Scroll Speed
float ScratchIntensity = 0.65f;	//Scratch Threshhold
float IS = 0.01f;	//Scratch Width

static float ScanLine = (vecTime.w*Speed);
static float Side = (vecTime.w*vecSkill1.x);


texture TargetMap;
sampler postTex = sampler_state
{
   texture = (TargetMap);
   MinFilter = linear;
   MagFilter = linear;
   MipFilter = linear;
   AddressU = clamp;
   AddressV = clamp;
};

texture mtlSkin1;
sampler Noise2DSamp = sampler_state
{
   texture = (mtlSkin1);
   MinFilter = linear;
   MagFilter = linear;
   MipFilter = linear;
   AddressU = Wrap;
   AddressV = clamp;
};


float4 Scratch_PS(float2 TexCoord : TEXCOORD0)	:	COLOR
{
	float4 img = tex2D(postTex,TexCoord);
	float2 s = float2(TexCoord.x+Side,ScanLine);
	float scratch = tex2D(Noise2DSamp,s).x;
	scratch = 2.0f*(scratch - ScratchIntensity)/IS;
	scratch = 1.0-abs(1.0f-scratch);
	//scratch = scratch * 100.0f;
	scratch = max(0,scratch);
	//scratch = min(scratch,1.0f);
	return img + float4(scratch.xxx,0);
}

technique Main
{
	pass p001
	{
		VertexShader = null;
		PixelShader = compile ps_2_0 Scratch_PS();
	}
}

technique fallback { pass one { } }

You also need this image "noise1.jpg":

C-Script

---

Material and function to adjust the effect:

//Scrached Film
bmap Noise2_bmap = "noise1.jpg";
material ScrachedFilm_mat
{
	skin1 = Noise2_bmap;
	effect = "ScrachedFilm.fx";
}

function ScrachedFilm_set_Value(SideScrollSpeed)
{
	ScrachedFilm_mat.skill1 = floatv(SideScrollSpeed);	//usually a small value like 0.01
}

The ScrachedFilm.fx file:

//////////////////////////////////////////////////////////
////Scrached Film Effect from the Nvidia Shaderlibrary////
//////////////////////////////////////////////////////////

float4 vecSkill1;	//Side Scroll Speed
float4 vecTime;

float Speed = 10.0f;	//Speed (Slower=Longer Scratches)
//float Speed2 = 0.005f;	//Side Scroll Speed
float ScratchIntensity = 0.65f;	//Scratch Threshhold
float IS = 0.01f;	//Scratch Width

static float ScanLine = (vecTime.w*Speed);
static float Side = (vecTime.w*vecSkill1.x);


texture entSkin1;
sampler postTex = sampler_state
{
   texture = (entSkin1);
   MinFilter = linear;
   MagFilter = linear;
   MipFilter = linear;
   AddressU = clamp;
   AddressV = clamp;
};

texture mtlSkin1;
sampler Noise2DSamp = sampler_state
{
   texture = (mtlSkin1);
   MinFilter = linear;
   MagFilter = linear;
   MipFilter = linear;
   AddressU = Wrap;
   AddressV = clamp;
};


float4 Scratch_PS(float2 TexCoord : TEXCOORD0)	:	COLOR
{
	float4 img = tex2D(postTex,TexCoord);
	float2 s = float2(TexCoord.x+Side,ScanLine);
	float scratch = tex2D(Noise2DSamp,s).x;
	scratch = 2.0f*(scratch - ScratchIntensity)/IS;
	scratch = 1.0-abs(1.0f-scratch);
	//scratch = scratch * 100.0f;
	scratch = max(0,scratch);
	//scratch = min(scratch,1.0f);
	return img + float4(scratch.xxx,0);
}

technique Main
{
	pass p001
	{
		VertexShader = null;
		PixelShader = compile ps_2_0 Scratch_PS();
	}
}

You also need this image "noise1.jpg":

--Slin 01:41, 11 November 2007 (CET)