// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Touch-sampled rounded-diamond shape
// Not compiled or tested in-world
// Setup: Put in a spare ordinary cube you own. Touch different places on one face to sample the procedural pattern at live surface coordinates. Edit the constants to design a pattern.
// Stop / restore: Disable/remove. Only private owner messages are produced; no texture or tint is applied.
// Notes: Exponent2 gives an ellipse,1 a diamond, and larger values squarer shapes. This is not an exact distance field. Surface coordinates depend on the viewer and mesh; ordinary prim faces are the clearest test surface.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Live surface-coordinate sampler.
float EXPONENT=4.0;
float HALF_W=0.7;
float HALF_H=0.5;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        vector uv=llDetectedTouchST(0);
        if(llDetectedTouchFace(0)<0||uv==TOUCH_INVALID_TEXCOORD)
        {
            llOwnerSay("Surface coordinates unavailable.");
            return;
        }
        vector p=2.0*uv-<1.0,1.0,0.0>;
        if(EXPONENT<=0.0||HALF_W<=0.0||HALF_H<=0.0)
        {
            llOwnerSay("Positive settings required.");
            return;
        }
        float value=llPow(llFabs(p.x)/HALF_W,EXPONENT)+llPow(llFabs(p.y)/HALF_H,EXPONENT);
        llOwnerSay("Implicit value="+(string)value+" inside="+(string)(value<=1.0));
    }
}