has some of you shader maniacs an idea why the old electricity shader doesnt work on recent (geforce 570/560) cards but on an old geforce 8800gtx.
the shader compiles just fine on both system but does its magic only on the old card.
//Electricty PS1.1 / VS2.0
//
// -----------------------------------------------------------------------------
// PARAMETERS:
// ------------------------------------------------------------------------------
//Tranforms
float4x4 tWVP: WORLDVIEWPROJECTION;
//Tweaks
float4 col2 : COLOR <String uiname="Color"; > = {1, 1, 1, 1};
float glowStrength;
float ambientGlow;
float ambientGlowHeightScale;
float height;
float glowFallOff;
float speed;
float vertexNoise;
float time;
//Texture
texture Noise_Tex;
sampler Noise = sampler_state
{
Texture = (Noise_Tex);
ADDRESSU = WRAP;
ADDRESSV = WRAP;
ADDRESSW = WRAP;
MAGFILTER = LINEAR;
MINFILTER = LINEAR;
MIPFILTER = LINEAR;
};
//Structure
struct vs2ps {
float4 Pos: POSITION;
float2 texCoord: TEXCOORD;
};
// -----------------------------------------------------------------------------
// VERTEXSHADER
// -----------------------------------------------------------------------------
vs2ps VS(
float4 Pos: POSITION)
{
vs2ps Out = (vs2ps)0;
// Clean up inaccuracies
Pos.xy = sign(Pos.xy);
Out.Pos = mul(Pos, tWVP);
Out.texCoord = Pos.xy;
return Out;
}
// -----------------------------------------------------------------------------
// PIXELSHADER
// -----------------------------------------------------------------------------
float4 PS(
float2 texCoord: TEXCOORD) : COLOR
{
float2 t = float2(speed * time * 0.5871 - vertexNoise * abs(texCoord.y), speed * time);
// Sample at three positions for some horizontal blur
// The shader should blur fine by itself in vertical direction
float xs0 = texCoord.x;
float xs1 = texCoord.x;
float xs2 = texCoord.y + texCoord.x ;
// Noise for the three samples
float noise0 = tex3D(Noise, float3(xs0, t)).r;
float noise1 = tex3D(Noise, float3(xs1, t)).r;
float noise2 = tex3D(Noise, float3(xs2, t)).r;
// The position of the flash
float mid0 = height * (noise0 * 2 - 1) * (1 - xs0 * xs0);
float mid1 = height * (noise1 * 2 - 1) * (1 - xs1 * xs1);
float mid2 = height * (noise2 * 2 - 1) * (1 - xs2 * xs2);
// Distance to flash
float dist0 = abs(texCoord.y - mid0);
float dist1 = abs(texCoord.y - mid1);
float dist2 = abs(texCoord.y - mid2);
// Glow according to distance to flash
float glow = 1.0 - pow(0.25 * (dist0 + 2 * dist1 + dist2), glowFallOff);
// Add some ambient glow to get some power in the air feeling
float ambGlow = ambientGlow * (1 - xs1 * xs1) * (1 - abs(ambientGlowHeightScale * texCoord.y));
return (glowStrength * glow * glow + ambGlow) * col2;
}
//--------------------------------------------------------------//
// Technique
//--------------------------------------------------------------//
technique Electricty
{
pass P0
{
VertexShader = compile vs_1_1 VS();
PixelShader = compile ps_2_0 PS();
}
}
Elektricity.rar (758.8 kB)
