HLSL Programmable Tweening

[rifter1818]

This is my Effect file.

float4x4 WorldViewProj;

float Time;

void Main(

in float4 Pos1 : POSITION0,

in float4 Pos2 : POSITION1,

out float4 Pos : POSITION)

{

float4 tPos = pos2 - pos1;

tPos *= Time;

Pos = tPos + pos1;

pos = mul(pos,WorldViewProj);

}

technique ANM

{

pass p0

{

VertexShader = compile vs_1_1 Main;

PixelShader = Null;

}

}

When i try and load it i get the following error

C:\ANM.fx(8): error X3004: undeclared identifier 'pos2'

Any ideas folks.

On another note my vertex Declaration is

Dim ve As VertexElement() = New VertexElement() {New VertexElement(0, 0, _

DeclarationType.Float4, DeclarationMethod.Default, _

DeclarationUsage.Position, 0), New VertexElement(1, 0, _

DeclarationType.Float4, DeclarationMethod.Default, _

DeclarationUsage.Position, 1), VertexElement.VertexDeclarationEnd}

Dec = New VertexDeclaration(dev, ve)

if you see anything wrong there let me know.

[RobyDx]

HLSL is case sensitive then

pos2 is differente from Pos2

hovever to interpolate value use Lerp that do a linear interpolation from 2 vector passing a single value from 0 to 1.

[createdbyx]

I think HLSL is case sensitive so the line "float4 tPos = pos2 - pos1;" needs to be "float4 tPos = Pos2 - Pos1;" cause you declared your Pos1 and Pos2 vars with capital P's. ... Yes, no, maybe so???

[rifter1818]

Very Much So. Got The Case sensitive thing worked out not sure what the problem is now, no errors but nothing is displayed. But thats not a problem for here right now. Oh And Thumbs up for RobyDx's ShaderDK very nice. Check out his site.

[RobyDx]

If you can't see nothing the problen could be that you havent passed transform matrix in properly way