Hi,

this is probably a really stupid question, but I'm having problems with a simple function-call in an OpenCL Kernel.

Here's the code:
Code :
const float PI = 3.14159265359;
const float TWOPI = 6.28318530718;
 
float4 makeSphere(float4 pos, float radius) {
 
	float u = pos.x * TWOPI;
	float v = pos.y * PI;
 
	float4 sphere;
	sphere.x = radius * cos(u) * sin(v);
	sphere.y = radius * css(u) * sin(v);
	sphere.z = radius * cos(v);
	sphere.w = 1.0;
 
	return sphere;
}
 
 
__kernel void read_rgba8888(__rd image2d_t BaseImg, float Width, float Height, float Displacement,
						__global float4 *Mesh, __global float4 *Colors)
{
	// Get values for current iteration
	int		tid_x = get_global_id(0),
			tid_y = get_global_id(1),
			indx = tid_y * get_global_size(0) + tid_x;
 
	// Init variables		
	float4 color, vertex;
	//int2   pos = (int2)(tid_x, tid_y);
	// Floating-point position in 0 > 1 range
	float4 posFloat = (float4)((float)tid_x / Width, (float)tid_y / Height, 0.0, 1.0); 
 
 
	sampler_t smp = CLK_ADDRESS_CLAMP_TO_EDGE | CLK_FILTER_NEAREST;
 
	// Sample colour from base image
	color = read_imagef(BaseImg, smp, (int2)(tid_x, tid_y));
 
	// Write color at index in Colors output array
	Colors[indx] = color;
 
	// Displacement is determined by the displacement amount * the "length" of the color vector (ie approximate brightness)
	/*vertex =	(float4)
				((float)tid_x / get_global_size(0) - 0.5,
				1.0 - (float)tid_y / get_global_size(1) - 0.5,
				Displacement * length(color.xyzw), 1.0);*/
 
 
	// Write mesh value at index of Mesh output array
	Mesh[indx] = makeSphere(posFloat, 0.5);
}

It's obviously just supposed to bend the vertices around into a sphere, but I get an error
kernel referenced an external function css, that can not be found
I'm sure it's something very simple I'm doing wrong...

Anyone any advice?

a|x
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