hi there, i was once again trying to implement a displacementmapping and used tex2D(map,texCoord).x as a scaling factor. however, i get "Malfunction w1550 .. cannot map expression to vertex shader instruction set, ID3DXEffectCompiler::CompilerEffect.

this way of using a texture in the vertex shader (model 3.0) is shown all over in books so, why doesnt it work here?

another strange thing i found is the following code, which doesnt give any error, but doesnt work too,:

Code:

---

static float3 g[] =
{
	1,1,0, -1,1,0, 1,-1,0, -1,-1,0,
	1,0,1, -1,0,1, 1,0,-1, -1,0,-1,
	0,1,1, 0,-1,-1, 0,1,-1, 0,-1,-1,
	1,1,0, 0,-1,1, -1,1,0, 0,-1,-1
};

texture gradTexture
<
string texturetype = "2D";
string format = "q8w8v8u8";
string function = "GenerateGradTexture";
int width = 16, height = 1; 
>;

float3 GenerateGradTexture (float p: POSITION) : COLOR
{
	return g[p*16];
}

sampler gradSampler = sampler_state
{
	texture = <gradTexture>;
	AddressU = Wrap;
	AddressV = Clamp;
	MAGFILTER = POINT;
	MINFILTER = POINT;
	MIPFILTER = NONE;
};

---

when using the sampler lateron , something shoud be visible, but it isnt.

is this something i am doing wrong, or is shadermodel3.0 not fully supported by 3dgs?

if you feel this belongs to the shader forum, please move it over. i thought to put it here

thanks in advance for any info

I'm moving this to the shader forum where the question probably can be better answered - compared to me, many users know lot more about shaders.

Error messages like above are often caused because not all register combinations are supported in lower shader models.

Shadermodel 3.0 is supported by 3DGS (if you give it in the vs_compile and ps_compile instructions).

ehm, vs_compile and ps_compile? i thought its only compile for both. i'll check that